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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

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FORM 10-K/A
(Amendment No. 1)

ZENITH NATIONAL INSURANCE CORP.

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act: None.

        Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act:     Yes   X     No         

        Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act:     Yes           No    X   

        Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.     Yes   X     No          

        Indicate by checkmark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).      Yes           No          

        Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.    ý

        Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a small reporting company. See definitions of "large accelerated filer," "accelerated filer," and "smaller reporting company" in Rule 12b-2 of the Exchange Act.

        Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act):      Yes           No    X   

        The aggregate market value of the voting and non-voting common equity of the registrant held by non-affiliates was $794,234,000 (based on the closing price for such common equity reported by the New York Stock Exchange for June 30, 2009, the last business day of the registrant's most recently completed second quarter).

        At January 31, 2010, there were 37,880,463 shares of Zenith National Insurance Corp. common stock outstanding.

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EXPLANATORY NOTE

       Pursuant to General Instruction G to Form 10-K, this Amendment No. 1 on Form 10-K/A ("Amendment No. 1") to Zenith National Insurance Corp.'s Annual Report on Form 10-K for the fiscal year ended December 31, 2009, which was filed with the Securities and Exchange Commission ("SEC") on February 10, 2010 ("Original Filing"), is being filed for the sole purpose of including information in Part III, Items 10 through 14, because the definitive proxy statement for our 2010 Annual Meeting of Stockholders will not be filed with the SEC within 120 days after the end of our 2009 fiscal year. The reference on the cover of the Original Filing to the incorporation by reference of portions of our definitive proxy statement into Part III of the Original Filing is hereby deleted.

       In accordance with Rule 12b-15 under the Securities Exchange Act of 1934, as amended ("Exchange Act"), Part III, Items 10 through 14 of the Original Filing have been amended and restated in their entirety and Part IV, Item 15, Paragraph (a) 3 of the Original Filing has been amended and restated solely to include as exhibits the new certifications required by Rule 13a-14(a) under the Exchange Act. This Amendment No. 1 does not amend or otherwise update any other information in the Original Filing. Accordingly, this Amendment No. 1 should be read in conjunction with the Original Filing and with Zenith National Insurance Corp.'s filings with the SEC subsequent to the Original Filing.

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PART III

Item 10.  DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

Directors

       The current serving directors ("Directors") of Zenith National Insurance Corp. ("Zenith") are set forth below. Each of the Directors also serves as a director of Zenith Insurance Company ("Zenith Insurance"), Zenith's principal operating subsidiary. Once elected, a Director serves until the next Annual Meeting of Stockholders and until his or her successor is elected and qualified or until his or her earlier death, resignation or removal. Pursuant to an Agreement and Plan of Merger dated February 17, 2010 by and among Zenith, Fairfax Financial Holdings Limited and Fairfax Investments II USA Corp., upon satisfaction of customary closing conditions and consummation of the transaction, each of the Directors will resign from the boards of directors of Zenith and Zenith Insurance. See "Change in Control" in Item 12.

       Each Director has been determined by the Nominating and Corporate Governance Committee and the Board of Directors (the "Board") to meet the minimum qualifications for service as a Director, namely an ability, as demonstrated by recognized success in his or her field, to make meaningful contributions to the Board's oversight of the business and affairs of Zenith and an impeccable reputation of integrity and competence in his or her personal and professional activities. Criteria utilized by the Nominating and Corporate Governance Committee in evaluating Directors include the possession of such knowledge, skills, expertise and diversity of experience so as to enhance the Board's ability to manage and direct the business and affairs of Zenith, including when applicable, to enhance the ability of committees of the Board to fulfill their duties and/or satisfy any independence requirements imposed by law, regulation or New York Stock Exchange ("NYSE") listing requirements. In making this assessment, the Nominating and Corporate Governance Committee and the Board have also identified the experience, qualifications, attributes or skills of each Director, further qualifying him or her to serve as a Director. These further qualifications are set forth in the following table, along with other information on each Director that was supplied or confirmed by such Director.

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Section 16(a) Beneficial Ownership Reporting Compliance

       Section 16(a) of the Exchange Act and the regulations of the SEC thereunder require Zenith's Executive Officers and Directors, and persons who own more than ten percent of a registered class of Zenith's equity securities, to file reports of ownership and changes in ownership with the SEC and the NYSE and to furnish Zenith with copies of all such forms they file.

       Based solely on its review of the copies of such forms received by it and written representations from certain reporting persons, Zenith believes that, during the year ended December 31, 2009, its Executive Officers, Directors and 10% stockholders complied with all applicable filing requirements with respect to Zenith's only registered class of equity securities, its common stock, $1.00 par value per share ("Common Stock").

Audit Committee

       The Audit Committee, which was established in accordance with Section 3(a)(58)(A) of the Exchange Act, consists of Messrs. Zavis (Chairman), Coben and Rothenberg and Ms. Reynolds. The primary purpose of this committee is to assist the Board's oversight of: (1) the integrity of Zenith's financial statements; (2) Zenith's compliance with legal and regulatory requirements; (3) the qualifications and independence of Zenith's independent auditors; and (4) the performance of Zenith's independent auditors and Zenith's internal audit function. The Audit Committee is directly responsible, in its sole discretion, for the selection, evaluation and compensation of Zenith's independent auditors. In connection with the oversight of the integrity of Zenith's financial statements, among other responsibilities, the Audit Committee: (i) reviews with management and the independent auditors and, if appropriate, the officer responsible for Zenith's internal audit department, Zenith's audited annual financial statements and quarterly financial statements including reviewing Zenith's specific disclosures under "Management's Discussion and Analysis of Consolidated Financial Condition and Results of Operations," Zenith's critical and other accounting policies, and any major financial reporting issues that have arisen in connection with the preparation of the financial statements; (ii) attempts to resolve disagreements, if any, between Zenith's independent auditors and management regarding financial reporting; (iii) reviews on a regular basis any problems or difficulties encountered by the independent

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auditors in the course of any audit work; and (iv) regularly reviews the adequacy and effectiveness of Zenith's internal control policies, including the responsibilities, budget and staffing of Zenith's internal audit function. During 2009, the Audit Committee communicated frequently with personnel from Zenith's financial and accounting department, internal audit department, actuarial department, corporate legal staff and independent auditors, including at seven meetings.

       The Charter for the Audit Committee was last revised and readopted by the Board on December 7, 2006. A copy of the current Charter is posted on Zenith's website, www.thezenith.com.

       Each member of the Audit Committee is an independent director under the NYSE listing standards and other applicable laws, rules and regulations.

       All members of the Audit Committee are financially literate. The Board has determined that each of Ms. Reynolds and Mr. Rothenberg, both of whom are independent, qualify as audit committee financial experts and that each of them has accounting or related financial management expertise.

Compensation Committee

       The Compensation Committee consists of Messrs. Miller (Chairman), Rothenberg and Zavis and Ms. Reynolds. This committee discharges the Board's responsibilities relating to compensation, including: (1) establishing, implementing and reviewing policies relating to, and the goals and objectives of, compensation plans and practices for Zenith's executive officers as identified under "Executive Officers" in this Item 10 ("Executive Officers"); (2) evaluating the performance of Zenith's Executive Officers in light of established compensation goals and practices and setting appropriate compensation levels based on this evaluation; (3) providing for the administration of Executive Officer compensation plans and practices (and discharging any duties or responsibilities imposed on the Compensation Committee thereby); (4) reviewing Zenith's general compensation, equity compensation, and incentive compensation plans and their goals and objectives; (5) amending Zenith's general compensation, equity compensation and incentive compensation plans; (6) performing any duties assigned to the Compensation Committee under Zenith's general compensation, equity compensation and incentive compensation plans; (7) evaluating compensation levels for non-employee members of the Board; (8) reviewing and discussing with management Zenith's Compensation Discussion and Analysis for inclusion in Zenith's Annual Report on Form 10-K or proxy statement; and (9) preparing the Compensation Committee Report as required by the rules of the SEC. As part of its duties, the Compensation Committee administers the Executive Officer Bonus Plan ("Bonus Plan"), a performance-based compensation plan approved by stockholders, and the Zenith National Insurance Corp. Third Amended and Restated 2004 Restricted Stock Plan ("Restricted Stock Plan"). The Compensation Committee held four meetings in 2009. The Compensation Committee has not delegated any of its authority to others.

       The Charter for the Compensation Committee was last revised and readopted by the Board on December 6, 2007. A copy of the current Charter is posted on Zenith's website, www.thezenith.com.

       Each member of the Compensation Committee is a "non-employee director" as defined under Rule 16b-3 of the Exchange Act and is also an "outside" director as defined under Section 162(m) of the Internal Revenue Code of 1986, as amended ("Code"), as well as an independent director under the NYSE listing standards and other applicable laws, rules and regulations.

Compensation Committee Process and Procedures

       The Compensation Committee determines the compensation (specifically, fees and awards of restricted stock) to be paid to non-employee Directors for service on the Board, on Board committees and as committee chairs. In most instances, the Compensation Committee receives suggestions on the level of compensation for non-employee Directors from Mr. Zax, the Chief Executive Officer, or from

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other members of the Board. These suggestions are then considered by the Compensation Committee as part of establishing any changes to the compensation for non-employee Directors.

       In establishing the compensation for Zenith's Executive Officers, other than Mr. Zax (who is the Chief Executive Officer), the Compensation Committee receives and considers recommendations from Mr. Zax, together with an explanation of his recommendations. The Compensation Committee evaluates Mr. Zax's recommendations in light of Zenith's performance and its goals, as well as the Executive Officer's performance, and either accepts, modifies or rejects Mr. Zax's recommendations. In establishing the compensation for Mr. Zax, the Compensation Committee usually meets with Mr. Zax and discusses his performance, as reflected in Zenith's performance, stockholder value, significant undertakings, posture in the industry and positioning for the future. Mr. Zax's compensation is evaluated based on the foregoing, after which the Compensation Committee arrives at an appropriate level of compensation for him. (See "Compensation Discussion and Analysis for 2009" in Item 11 for more information.)

       In establishing the compensation for non-employee Directors, the Compensation Committee usually relies on the experience and knowledge of its members and may consider surveys or studies. It does not engage the services of any compensation consultants. Similarly, in determining the appropriate level of compensation for Mr. Zax and the other Executive Officers, the Compensation Committee does not utilize benchmarking or surveys or the services of compensation consultants, but relies on the experience and knowledge of its members. The Compensation Committee consists of four members. Three are attorneys, one of whom served as Governor of Nevada, another was a founding partner of a national business law firm and the third was a senior partner in a major firm and is involved in a number of business and sports-related ventures. The fourth member was the founder and chief executive officer of a successful national lender to students pursuing higher education. Further, with respect to any action the Compensation Committee is authorized to take, the Compensation Committee may, in its discretion, elect to recommend action to the Board, rather than take action itself, to the extent permitted by applicable law or stock exchange regulations.

Nominating and Corporate Governance Committee

       The Nominating and Corporate Governance Committee consists of Messrs. Kampelman (Chairman), Miller, Nuñez and Sessions. The primary purpose of this committee is to assist the Board in identifying, and recommending to the Board for nomination, qualified individuals to serve as members of the Board and committees of the Board. The committee is also responsible for: (1) developing and recommending to the Board a set of corporate governance guidelines applicable to Zenith; (2) reviewing those guidelines adopted by the Board at least annually to assure that they are appropriate for Zenith and consistent with applicable laws, rules and regulations; and (3) overseeing the evaluation of the Board as a whole and the management of Zenith, including the Chief Executive Officer of Zenith. The Nominating and Corporate Governance Committee held four meetings in 2009.

       The Charter for the Nominating and Corporate Governance Committee was last revised and readopted by the Board on February 10, 2005. A copy of the current Charter is posted on Zenith's website, www.thezenith.com.

       Each member of the Nominating and Corporate Governance Committee is an independent director under the NYSE listing standards and other applicable laws, rules and regulations.

Healthcare Committee

       On February 5, 2009, the Board formed the Healthcare Committee and appointed Messrs. Nuñez (Chairman), Coben and Rothenberg as members of the committee. The purpose of the Healthcare Committee is to oversee all healthcare-related matters involving Zenith's workers' compensation insurance subsidiaries ("Insurance Companies"). "Healthcare" for this purpose means all activities associated with the provision of workers' compensation medical care to injured workers, including, but

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not limited to, the provider networks, utilization review and medical management activities and related administrative and operational capacities of the Insurance Companies. This oversight is conducted by (1) providing general supervision and oversight of all healthcare-related matters involving the Insurance Companies; (2) periodically reviewing the personnel and organizational structure of all healthcare-related functions and areas of the Insurance Companies; (3) periodically reviewing audit reports, regulatory findings and other reports and materials related to the Insurance Companies' provider networks, utilization review and medical management activities, and related administrative and operational capabilities; (4) periodically reviewing the Insurance Companies' policies and procedures (or parts thereof) to make timely and appropriate medical care available to injured workers; and (5) making such recommendations and providing such guidance related to the foregoing as the Healthcare Committee determines to be appropriate.

       The Charter for the Healthcare Committee was adopted by the Board on February 5, 2009. A copy of the current Charter is posted on Zenith's website, www.thezenith.com. The Healthcare Committee held four meetings in 2009.

Executive Officers

       The Executive Officers are elected each year at the Board meeting immediately following the Annual Meeting of Stockholders, and at other Board meetings, as appropriate. Each of the Executive Officers is an officer of Zenith and certain of its subsidiaries. Except as noted in the pertinent notes, each Executive Officer has been employed by Zenith or Zenith Insurance in executive positions for more than the past five years.

       At February 25, 2010 (except for Janet Frank), the Executive Officers of Zenith are:

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Code of Ethics for Senior Financial Officers

       A "Code of Ethics for Senior Financial Officers" was revised and readopted by the Board on February 11, 2004. This code applies to Zenith's principal executive officer, its principal financial officer and its principal accounting officer. A copy of the current code is posted on Zenith's website, www.thezenith.com.

Code of Business Conduct

       A "Code of Business Conduct" was revised and readopted by the Board on December 7, 2006. This code, which governs business conduct and ethics, applies to Zenith's directors, officers and employees. A copy of the current code is posted on Zenith's website, www.thezenith.com.

Item 11.  EXECUTIVE COMPENSATION

Compensation Discussion and Analysis for 2009 ("CD&A")

Introduction

       Total executive compensation is designed to attract and retain our Executive Officers, including the named executive officers identified in the Summary Compensation Table in this Item 11 ("Named Executive Officers"), as well as to reward them for above average performance over a sustained period of time. The guiding philosophies for the design of our Executive Officer compensation are to be fair, simple and transparent, easily quantifiable and related to the performance of Zenith. Total Executive Officer compensation includes base salary, cash bonuses, restricted stock awards and certain perquisites, which are discussed below under "Elements of Executive Officer Compensation" in this CD&A. It is our belief that if our Executive Officers have substantial long-term incentives and are partners with our stockholders, the rewards to all will be maximized. We initially established these general objectives for Executive Officer compensation over thirty years ago and the objectives continue to withstand the test of time.

       Our Executive Officers also receive certain other benefits which are available to all other full-time Zenith employees, including group health insurance, group life insurance, 401(k) Plan benefits, paid vacation time off and employee stock purchase plan benefits. In addition, Executive Officers are eligible, along with all other senior officers of Zenith and its subsidiaries, to an enhanced life insurance program, except for Mr. Zax, who is entitled to a specific level of life insurance coverage under his employment agreement. (See the description of the enhanced life insurance program and Mr. Zax's life insurance benefits that is set forth below under "Perquisites and Other Personal Benefits" in this CD&A.)

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       Refer to the discussion under "Compensation Committee" in Item 10 for a general description of the Compensation Committee and its membership and activities in 2009. In establishing the appropriate level of compensation for our Executive Officers, the Compensation Committee relies on the experience and knowledge of its members, as well as input from the Chief Executive Officer for all Executive Officers other than himself. Zenith does not utilize benchmarking, surveys, the services of outside compensation consultants or tally sheets in making its compensation decisions.

       The following provides details on (1) the objectives of Zenith's compensation program, (2) what the program is designed to reward, (3) the specific elements of compensation, (4) why Zenith has chosen to pay each element, (5) how Zenith determines amounts to be allocated to each element and (6) how these elements fit within, and are consistent with, Zenith's overall compensation objectives.

Objective and Design of Zenith's Executive Officer Compensation

       We believe our Executive Officers are critical to continuing our long history of success as a specialist workers' compensation insurance company with a quality service strategy. We therefore attempt to primarily align compensatory rewards of our Executive Officers with the success of Zenith's workers' compensation business operations over a sustained period of time. Executive Officers receive compensatory rewards above their existing base salary when Zenith has successful performance relative to the workers' compensation industry and the amount of the rewards to a given Executive Officer takes into consideration the Executive Officer's contribution to the successful performance of Zenith. We evaluate Zenith's performance by its overall profitability, increase in stockholders' equity plus dividends to stockholders over the long term, workers' compensation combined ratio as compared to the combined ratio of the industry and the performance of its investment portfolio, including realized gains and losses.

       In determining each Executive Officer's contribution to the success of Zenith, we not only consider the manner in which the Executive Officer favorably affects Zenith's combined ratio and profitability or otherwise performs his or her operational or administrative duties, but also the ability of each Executive Officer to appropriately assess "risk versus reward" and the manner in which the Executive Officer performs in Zenith's environment, which cultivates an entrepreneurial spirit, innovation, efficiency, compliance with ethical operating standards, customer service, teamwork, an understanding and use of technology and a commitment to education.

       We believe an entrepreneurial spirit fosters above-average results, promotes sound execution of good business fundamentals and helps Zenith attract, develop and retain talented employees. Compliance with strong ethical operating standards is essential to assure a disciplined business approach and to preserve Zenith's reputation. An orientation towards customer service promotes Zenith's focused workers' compensation strategy. Adherence to teamwork is crucial to the effective and efficient implementation of Zenith's goals. Understanding, adopting and using technology are necessary for Zenith to continually improve the delivery of quality services in a disciplined and efficient manner. A commitment to education means a dedication to lifelong learning and training for oneself, developing future leaders of Zenith and creating conditions so that the workforce is similarly dedicated. This dedication to continuous improvement in our aggregate knowledge and curiosity is critical to Zenith's ability to address changes in market conditions and to use such changes to its competitive advantage. In such an environment, proactive approaches that are innovative, yet controlled and well considered, are strongly encouraged and rewarded. On the operational side, activities that demonstrate an opportunistic outlook, anticipate changing business conditions, an ability to assess risk versus reward, and take advantage of opportunities to increase short-term and long-term profits are rewarded. On the administrative side, efficiency, competence, strong compliance and risk management efforts, anticipation and avoidance of problems, as well as innovation, are rewarded.

       We believe Zenith benefits when its Executive Officers have a long-term commitment to Zenith coupled with the expectation to consistently deliver superior leadership and performance over time. As

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a result, we granted restricted stock to our Executive Officers (other than to Mr. Zax as described below) and have employment agreements with all Executive Officers other than Keith E. Trotman. Mr. Trotman had been employed by Zenith for more than 16 years prior to being named an Executive Officer in 2005; therefore, an employment agreement was not considered necessary to ensure his long-term commitment to Zenith. All employment agreements (other than the employment agreement for Mr. Zax, our Chief Executive Officer) have similar terms and conditions. These agreements define the specific elements of compensation provided to the Executive Officers (which are also provided to Mr. Trotman), and also contain provisions providing for the payment of post-termination benefits as described in more detail below. The term of all of the agreements ends on December 31, 2012.

       Mr. Zax has the same compensation elements as the other Executive Officers, except for restricted stock (which he has not been granted due to his existing significant personal ownership interest in Zenith). In addition, Mr. Zax is provided with certain perquisites pursuant to his employment agreement initially entered into in 1981, as amended from time to time thereafter.

Elements of Executive Officer Compensation

       Within the context of these overarching principles, Executive Officer compensation includes the following elements, which apply generally to all Executive Officers, except as noted above for Mr. Zax:

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Base Salary — Base salary is determined separately for each Executive Officer and is initially determined based on a number of factors including the executive's position and scope of responsibilities; the educational background, experience and expertise of the individual; and our ability to attract the individual to Zenith, which takes into account compensation received by the individual prior to joining Zenith. We also consider the total compensation offered to each Executive Officer at the time of hire in determining the initial base salary. The base salary may be increased over time for an Executive Officer based on the individual's performance and contributions to the success of Zenith. The employment agreements provide that base salaries may not be decreased. Base salary is paid in cash in 24 equal installments each year.

Increases to the level of an Executive Officer's base salary are generally based on a combination of (1) the performance of Zenith, (2) the performance of the business segment, if any, to which the Executive Officer is principally assigned, (3) a subjective and qualitative evaluation of the personal contribution made by the Executive Officer over time, (4) the length of time since the last increase in base salary for the Executive Officer and (5) the total compensation provided to the Executive Officer, including cash bonuses and stock awards. These factors do not translate mechanically into compensation levels and compensation is not based on any formulaic weighting. Each Executive Officer's performance and compensation, including base salary, are reviewed by the Compensation Committee each December, as well as other times determined to be appropriate by the Compensation Committee. Mr. Zax provides input to the Compensation Committee on the amount and timing of base salary increases for Executive Officers, except for himself, based on the above, and subject to the discretionary approval of or modification by the Compensation Committee. Base salary increases for Mr. Zax are determined and approved by the Compensation Committee at its discretion based on the overall performance of Zenith, including the performance of the investment portfolio and increases in stockholder value attributable to his efforts. In making compensation decisions, the Compensation Committee members have the further benefits of interacting with the Executive Officers frequently with the opportunity to continually evaluate them, as well as having been on the Board for an extended period of time and gaining familiarity with Zenith's operations and executives. (The length of service as a Director for members of the Compensation Committee range from about six years to about twelve years.)

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Annual Cash and Stock Bonus Awards — The Compensation Committee has full discretion to award both cash bonuses and shares of restricted stock to reward our Executive Officers for

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successful performance consistent with the compensation objectives described above. In making these annual bonus award determinations, the Compensation Committee considers input from Mr. Zax regarding the amount of annual bonus awards (other than his own) based on his discretionary judgment of the performance and contribution of each Executive Officer using the factors outlined and described under "Objective and Design of Zenith's Executive Officer Compensation" above in this CD&A and other factors it deems relevant, as well as the Executive Officer's tenure with Zenith and other factors. These annual bonus awards are made through cash bonuses and through grants of restricted stock. Although ordinarily cash bonuses are paid under the Bonus Plan, the Compensation Committee also retains the ability to award discretionary cash bonuses outside of the plan. In determining the total annual bonus amount for each Executive Officer, the Compensation Committee considers the Executive Officer's total compensation.


As for Mr. Zax, his annual bonus award (and the components thereof) are determined by the Compensation Committee at its sole discretion, based on its discretionary judgment of the performance and contributions of Mr. Zax using the factors outlined and described under "Objective and Design of Zenith's Officer Executive Compensation" above in this CD&A and other factors it deems relevant, such as those described below under the description of the consideration of whether or not to award him a discretionary cash bonus for 2009.


The following sets forth a description of each of these components of annual bonus awards.

Executive Officer Bonus Plan — The Bonus Plan was initially approved by stockholders in 1994, was amended and restated by stockholders in 2003, and was amended in 2008 to comply with Section 409A of the Code. The Bonus Plan is described under "Bonus" following the Summary Compensation Table in this Item 11 and is designed and administered to provide an annual reward for Executive Officers when (1) Zenith achieves an underwriting profit measured by Zenith's workers' compensation combined ratio of under 100% and (2) Zenith's combined ratio is better than the workers' compensation industry by certain increments. By providing this potential annual reward, Zenith believes it provides a compelling incentive to Executive Officers to achieve underwriting profits in excess of these objective performance goals. Zenith's underwriting performance determines the maximum level of bonuses Executive Officers are eligible to receive under the Bonus Plan.

Within the maximum levels of bonuses established when the performance goals set forth in the plan (related to Zenith's underwriting performance) are met, the Compensation Committee retains "negative discretion" in awarding lower payouts under the Bonus Plan. By setting a maximum bonus amount, which can then be reduced, the Bonus Plan complies with Section 162(m) of the Code, so that Zenith preserves its tax deduction for compensation paid under the Bonus Plan, as described below under "Tax and Accounting Policies" in this CD&A. Historically, although there is a performance target that establishes eligibility for compensation under the Bonus Plan, the use of negative discretion typically results in awards of compensation as if the Bonus Plan were a discretionary plan.

The performance goals of the Bonus Plan were not met for 2009, so no awards were payable under it for such year.

Discretionary Cash Bonuses — As noted above, the Compensation Committee also retains the ability to award cash bonuses separate and outside of the Bonus Plan at its sole discretion, taking into account the factors used to determine base salary and such other factors it deems to be appropriate.

Restricted Stock Awards — Restricted stock awards granted under the Restricted Stock Plan provide Executive Officers with equity-based incentives that are tied to Zenith's long-term

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stock price performance and also encourage Executive Officers to increase their ownership in Zenith. Restricted stock is awarded and issued at the sole discretion of the Compensation Committee to recognize an Executive Officer's contribution to the success of Zenith and to reinforce the Executive Officer's long-term commitment to this success, consistent with our long-term view of the business. Prior to 2009, stock awarded to Executive Officers under the Restricted Plan only provided for a four-year time-based vesting schedule, which was designed to provide a long-term retention vehicle for our Executive Officers and to also tie the awards to Zenith's long-term economic performance. In 2009, to further tie the awards to Zenith's long-term economic performance, performance-based vesting was instituted in addition to time-based vesting, so as to provide additional performance-based incentives for our Executive Officers. The Compensation Committee retains the discretion to determine which form of vesting (as well as, in certain instances, what combination of the two forms) to employ with respect to individual awards. (See "Restricted Stock Awards" following the Summary Compensation Table in this Item 11 for a description of the vesting provisions.)

In addition, in 2009 the Compensation Committee determined that with respect to future awards of restricted stock to employees, dividends on unvested restricted stock should no longer be paid when dividends are declared and paid on outstanding Common Stock, but instead should be accrued and paid only if and when the stock vests. The Compensation Committee concluded that this treatment would be consistent with, and reinforce the concept that grants of restricted stock are intended to award, above average performance over a sustained period of time.

Each Executive Officer's performance and compensation, including prior stock awards, are reviewed by the Compensation Committee each December (Compensation Committee meetings are usually scheduled a year in advance). If the Compensation Committee determines that awards of restricted stock should be made, they are granted and effective on the date of the Compensation Committee meeting at which the action is taken (except that if, at the time of the committee meeting, a prospective Executive Officer had committed to joining Zenith at a later date, the award may be made effective on the future date that he or she actually commences employment).

Mr. Zax provides input to the Compensation Committee on stock awards for Executive Officers, other than himself, and the Compensation Committee approves or modifies all awards based on the individual recipient's performance and contributions to the success of Zenith, taking into consideration the various factors described above, as well as other factors it deems relevant. There is no formula governing which vesting schedule is used or the number of shares awarded, which can be varied for each Executive Officer based on his or her individual contributions, tenure with Zenith, the length of time since the last award was granted, the number of shares previously awarded and other elements of compensation.

Restricted stock is also generally awarded to Executive Officers on commencement of employment, subject to approval by the Compensation Committee, as a means of attracting and retaining the Executive Officer.

Zenith has determined that its Restricted Stock Plan provides equity-based incentives aligned with the interest of stockholders for the long-term successful performance of Zenith. Stock options are no longer awarded and there are no stock options outstanding. Other than restricted stock, the discontinued stock options and the employee stock purchase plan (which is available to all employees), Zenith has not used any other type of equity-based compensation for its Executive Officers.

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Perquisites and Other Personal Benefits — Perquisites and other personal benefits are provided to Executive Officers. They receive (i) at their option, either an automobile allowance (paid in cash in 24 equal installments each year) or a company car (Executive Officers provided with a company car receive imputed income for income tax purposes on the value of their personal use of the car) and (ii) the right to use Zenith's corporate aircraft for both business and limited personal use. Executive Officers are not permitted to reimburse Zenith for the costs of personal use of the corporate aircraft because reimbursement would require Zenith to operate the aircraft under a charter certificate issued by the Federal Aviation Administration, which Zenith does not have, or require the entry into a time-sharing arrangement with the Executive Officers. As a result, Executive Officers receive imputed income for income tax purposes on their personal use of the corporate aircraft using Standard Industry Fare Level rates pursuant to Internal Revenue Service regulations. Executive Officers have use of the corporate aircraft primarily for security reasons and also for convenience. Personal use of the corporate aircraft by Mr. Zax is limited to 125 hours of flight time per calendar year. During 2009, Mr. Zax was the only Executive Officer to utilize the corporate aircraft for personal use.

Also, under his employment agreement, Mr. Zax is entitled to receive life insurance coverage with an aggregate face amount of at least $6,125,000. The aggregate face amount of life insurance Zenith currently maintains for Mr. Zax is $5,250,000 (which is $875,000 less than the coverage to which he is entitled under his employment agreement) and Mr. Zax has consented to receive this lesser coverage amount.

No other Executive Officers are entitled to a specific level of life insurance under their employment agreements. Executive Officers are entitled, as are all employees, to group life insurance in an amount equal to three times their annual base salary, with a ceiling of $750,000 (or a lower amount based on age). In addition, all senior officers, including the Executive Officers (other than Mr. Zax), are provided with additional life insurance benefits in order to receive total company-paid coverage equal to four times their respective annual base salary (subject to certain underwriting requirements based on age and amount of coverage). Under the program, senior officers may also elect to participate in a variable universal life feature, allowing them to purchase additional coverage and make payments into a cash accumulation account. The options to purchase additional coverage and to make deposits to the cash accumulation account are entirely between the insurance company and the employee and are at the personal cost of the employee.

Each senior officer (including all Executive Officers) is also paid an additional amount necessary to reimburse him or her for federal and state income taxes payable on the imputed income that he or she receives on the cost of any additional life insurance coverage in excess of the group life insurance coverage.

Perquisites are provided to Executive Officers irrespective of any actions taken on any other element of compensation. The Compensation Committee has full discretion in determining when and to what extent to reduce or expand the perquisites available to Executive Officers. Perquisites are factored into the Compensation Committee's evaluation of what constitutes a fair salary and are considered in establishing total compensation.

Other than standard employee benefits and the specific benefits described above, Zenith does not provide additional perquisites to its Executive Officers. The Compensation Committee believes that its total compensation package is reasonable and Zenith has demonstrated that it is able to hire and retain talented executives without offering additional perquisites.

Determination of Elements of Named Executive Officer Compensation

       The Named Executive Officers, as identified for the Summary Compensation Table in this Item 11, are Mr. Zax, the Chief Executive Officer, Ms. Van Gundy, the Chief Financial Officer, and

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Messrs. Trotman, Miller and Jansen, Zenith's three other most highly compensated Executive Officers serving as of December 31, 2009. Following is a description of the manner in which each element of their compensation was determined.

       Mr. Zax's compensation is determined under his employment agreement, which was amended by the Compensation Committee in September 2008. Mr. Zax's current annual base salary of $2,500,000 in effect since January 1, 2008 was established in 2007 and is subject to such increases as the Board or Compensation Committee may determine from time to time. Because Mr. Zax has accumulated a substantial personal ownership position in Zenith over his 30 years of leading Zenith (including stock he initially purchased in 1977), he was not granted any restricted stock awards.

       The Compensation Committee reviewed Mr. Zax's current base salary, as well as the amount of past increases. In considering whether there should be an increase in Mr. Zax's base salary or an award of a discretionary cash bonus to him, the Compensation Committee recognized that Mr. Zax continued to provide exceptional leadership in maintaining financial strength and achieving excellent returns to stockholders during a historically challenging economic environment, where Zenith was faced with continued volatility in the financial markets and an economic recession combined with intense competition in the workers' compensation industry.

       The Compensation Committee recognizes that the long-term success of Zenith is attributable to its successful management of risk (both insurance and investment) and that under Mr. Zax's leadership, the long-term strategy of effective risk management served Zenith and its stockholders well, particularly in 2009. In this regard, the Compensation Committee recognized the following factors attributable to Mr. Zax's leadership:

Investments: During 2009 there was substantial improvement in the value of Zenith's investment portfolio. The market value of the available-for-sale investment portfolio increased $133.4 million, ending the year in a net unrealized gain position of $56.1 million before tax. In addition, Zenith recognized net realized gains of $36.3 million in 2009 compared to losses of $18.5 million in 2008. Zenith's investment strategy is focused on benefiting from compound interest over the long term and prudently managing the risks versus reward of investment decisions. During 2009, Zenith increased liquidity and reduced the maturity length of its invested assets during a period in which interest rates continued at historically low levels, inflation was low, and credit spreads narrowed. This strategy resulted in lower investment income in the short term but positioned the Company to take advantage of investment opportunities over the long term.

Workers' Compensation: The loss ratio is a measure of how risk is managed over the long term and continued at acceptable levels and substantially below industry averages during 2009. Zenith recognized an underwriting loss in 2009 for the first time in seven years of $57.5 million before tax. Underwriting losses were caused by the combination of a reasonable loss ratio combined with relatively fixed expenses in relation to the declining premium volume. Net premiums earned declined 24% in 2009 due to the combination of the recessionary impacts on payroll and employment levels of insureds, competition and rate decreases. Costs were reduced as the business declined, but Zenith continues its strategy to maintain and improve its services to customers and ensure that it is in a position to grow the business when the economy and employment trends improve.

Financial Condition: After taking into account the stockholder dividends declared in 2009 of approximately $91 million, stockholders' equity was relatively unchanged from 2008. Zenith's tangible book value plus dividends per share increased 12.0% during the year, and at an annual average rate of 17.8% over five years.

       The Compensation Committee believed that Mr. Zax should be rewarded for his exceptional performance in 2009. However, in light of the workers' compensation underwriting loss in 2009 and the continuing economic uncertainties, the Compensation Committee decided that it was appropriate to

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continue to be conservative. Therefore, the Compensation Committee determined that Mr. Zax's annual base salary would not be changed and that no discretionary cash bonus would be awarded to Mr. Zax for 2009. The Compensation Committee concluded, based on its own judgment and experience, that Mr. Zax's annual base salary and all other elements of his total compensation are fair and appropriate at this time.

       The base salaries of Ms. Van Gundy and Messrs. Miller and Jansen are established under their employment agreements, which were amended in 2009. Except for Ms. Van Gundy whose amended employment agreement provides for an annual increase of $50,000 in June of 2009 and 2010, the base salaries of these three Named Executive Officers were not changed by the amendment. Further increases in base salary under the employment agreements are awarded at the discretion of the Compensation Committee, with input from Mr. Zax. Although Mr. Trotman does not have an employment agreement, any increases to his base salary are also awarded at the discretion of the Compensation Committee, with input from Mr. Zax. Mr. Miller's base salary is higher than the other three officers because of his service as President of Zenith Insurance with broad operational responsibilities for Zenith's principal operating subsidiary, and his base salary also reflects his tenure with Zenith as well as his years of experience in the workers' compensation industry. Ms. Van Gundy's compensation reflects the mutually agreed upon base salary between her and Zenith when she re-joined Zenith in July 2006 and the scheduled increases are in recognition of her contribution and leadership not only in the financial and accounting areas, but in certain operational areas, as well. Mr. Jansen's salary reflects the mutually agreed upon base salary between him and Zenith when he joined Zenith in 2006.

       The Compensation Committee, with input from Mr. Zax, reviewed the performance of each of these Named Executive Officers in 2009 based on all of the factors discussed above. It determined that each officer made significant contributions to the success of Zenith based on their specific roles and responsibilities. As it did in considering Mr. Zax's 2009 bonus and his annual base salary, the Compensation Committee decided that in considering the bonuses and annual base salaries of the Named Executive Officers, it was appropriate to be conservative in the face of the current economic challenges and uncertainties. The Compensation Committee determined that, except for the previously approved increase for Ms. Van Gundy, their annual base salaries would not be changed, but each officer would be awarded restricted stock awards as individually determined.

       As noted earlier, the performance goal under the Bonus Plan was not met for 2009 and no bonuses were payable under it. In determining whether discretionary cash bonuses should be awarded to Ms. Van Gundy and Messrs. Trotman, Miller and Jansen, the Compensation Committee first received input from Mr. Zax on the performance of each of these Named Executive Officers. The Compensation Committee determined that these Named Executive Officers made significant contributions to the success of Zenith based on their specific roles and responsibilities. The Compensation Committee then considered all other elements of compensation, including, in particular, the amount of annual restricted stock awards that had been granted to each of the Named Executive Officers in 2009 based on his or her individual contributions, tenure with Zenith, the length of time since the last award was granted and the number of shares previously awarded. Finally, the Compensation Committee applied its analysis of the same external factors that it had in determining whether a discretionary cash award should be awarded to Mr. Zax.

       After this process, the Compensation Committee decided that it was appropriate to award a discretionary cash bonus to Mr. Trotman because of his exceptional efforts and results during 2009 relative to managing the investment portfolio as discussed above. Mr. Trotman has day-to-day operational oversight over Zenith's investment portfolio and is not involved in the operations of the workers' compensation segment. The Compensation Committee awarded Mr. Trotman a discretionary cash bonus of $1 million in recognition of his extraordinary achievement in implementing Zenith's investment philosophy in 2009. The Compensation Committee decided that no other Executive Officer would be awarded a discretionary cash bonus for the reasons discussed above.

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       The Compensation Committee, with input from Mr. Zax, also concluded that each of these four Named Executive Officers' base salary plus all other elements of his or her total compensation was fair and appropriate. This determination recognized these Named Executive Officers' tenure and responsibilities in their current roles with Zenith, their past and continued outstanding performance and their stature in the workers' compensation industry.

Amendment to the Executive Officers' Employment Agreements

       In 2009, the employment agreement of each of the Executive Officers (except Mr. Zax, whose agreement had been amended in 2008 and Mr. Trotman, who does not have an agreement) were amended. The provisions of the amended and restated employment agreements are identical to one another, except with respect to the compensation and duties of the Executive Officers. In amending the employment agreements of the Executive Officers, the Compensation Committee extended the term of their employment to December 31, 2012 from October 31, 2009, but made no changes to their duties or compensation arrangement (except for two scheduled increases to Ms. Van Gundy's annual salary). The Compensation Committee authorized the entry into the amendments in an effort to retain availability of the Executive Officer's services for another three years.

       The amended and restated employment agreements of the Executive Officers were patterned after Mr. Zax's recently amended and restated employment agreement. In particular, the Compensation Committee took into consideration a concern raised by RiskMetrics Group's ISS Governance Service in its report and recommendations issued in connection with Zenith's 2008 Annual Meeting of Stockholders. The report indicated that Mr. Zax's employment agreement contained a "modified single trigger change in control arrangement" permitting him to terminate his employment for any reason following a change in control and receive severance benefits. In 2008, that provision was eliminated when Mr. Zax's employment agreement was amended and a similar provision in the employment agreements of the Executive Officers was eliminated as well when they were amended in 2009. Under the amended and restated employment agreements of all Executive Officers (including Mr. Zax), the only benefits they would have due strictly to a change in control would be the automatic vesting of any shares of restricted stock held by them and the payment by Zenith of an amount necessary to reimburse him or her for the excise tax that may be due for severance payments under Section 280G of the Code.

       As amended, an Executive Officer's ability to terminate his or her employment, whether before, after or unrelated to a change in control, and receive a severance payment will always require the existence of "Good Reason." Good Reason is defined as (a) material diminution in annual base salary; (b) material diminution in authority, duties, responsibilities or reporting relationship; (c) material diminution in the budget over which he or she has authority; (d) material change in geographic work location; or (e) any other material breach of the employment agreement by Zenith.

       The new key financial provisions of the amended and restated employment agreements are:

•

Severance payments upon the occurrence of the following events are:

•

Continued insurance benefits for two years for the affected Executive Officer and/or his or her family in the event of any termination due to any of the four events set forth above.

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•

The affected Executive Officer is eligible to receive a prorated amount of his or her annual bonus, the full amount of the previous year's bonus or no bonus for the year of termination depending upon the date of his or her termination (this is in addition to the other bonus payments that may become payable as severance under the employment agreement).

       The Compensation Committee believes the amended employment agreement is simple, transparent and fair to each of the Named Executive Officers, Zenith and its stockholders, in that the level of reward to each of them is commensurate with the benefit that Zenith and its stockholders will gain from the continuing employment of the Named Executive Officer.

Post-Employment Compensation

       The various post-employment compensation arrangements in the Executive Officers' employment agreements are identical except for the amounts and are included in order to attract and retain them. These arrangements also help provide our Executive Officers with financial security that permits them to professionally and consistently manage our insurance and investment segments with a long-term view of business opportunities and economic cycles.

       As currently structured, under the most economically favorable scenario to any one of the Executive Officers (including Mr. Zax), he or she would be entitled to receive no more than two years of severance payments. The Compensation Committee concluded that these severance amounts were reasonable.

       Mr. Zax's employment agreement provides that upon his retirement a five-year post-termination consulting arrangement will be entered into with Zenith to allow Zenith to continue to benefit from Mr. Zax's experience and unique knowledge of Zenith and the workers' compensation industry for an appropriate transition period. (See "Salary and Employment Agreements" following the Summary Compensation Table in this Item 11 under "Stanley R. Zax" for a description of this arrangement.)

Other Post-Retirement Benefits

       Executive Officers are not provided pension or other post-retirement benefits (other than Zenith's 401(k) Plan benefits which are available to all full-time employees); however, the overall level of compensation anticipates that each Executive Officer will be able to plan for his or her individual retirement needs. This approach is consistent with Zenith's philosophy of fair, simple and transparent compensation that is easily quantifiable and related to the performance of Zenith as further detailed above.

Tax and Accounting Policies

       Zenith applies the accounting guidance related to stock compensation in determining the value of the restricted stock awards described above.

       Section 162(m) of the Code generally limits the federal income tax deduction that a public corporation may claim for annual compensation paid to certain executive officers. The limitation with respect to each affected Executive Officer is $1 million per year. However, the limitation does not apply to compensation which is performance-based, earned under a plan approved by the corporation's stockholders and which satisfies certain other conditions set forth in Section 162(m) and the regulations thereunder. Bonuses payable under the Bonus Plan are intended to comply with Section 162(m). Accordingly, the amount of any bonus payment made to Executive Officers under the Bonus Plan should not be subject to the $1 million limit on deductibility. However, discretionary bonuses paid outside of the Bonus Plan and any income recognized upon the vesting of shares of restricted stock are subject to such limit on deductibility. The Board has determined that Zenith will pay annual salary (including Mr. Zax's annual salary over $1 million), pay potential discretionary bonuses outside of the Bonus Plan, and award shares of restricted stock to Executive Officers, even though some or all of an

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Executive Officer's income over $1 million may not be deductible by Zenith. In awarding the discretionary cash bonus in 2009 to Mr. Trotman, the Compensation Committee was aware that a large portion of the bonus would not be tax deductible and took this fact into consideration in making the award.

       As discussed above under "Perquisites and Other Personal Benefits" in this CD&A, all Executive Officers are paid additional amounts necessary to reimburse them for federal and state income taxes payable on the imputed income that they receive on the cost of any additional life insurance coverage in excess of the coverage provided under the group life insurance. In addition, as described under "Early Termination of Employment and Change in Control Arrangements" in this Item 11, pursuant to the current employment agreements with the Executive Officers (except Mr. Trotman, who does not have an employment agreement), if one of the specified termination events occurs, an Executive Officer is entitled to the continuation of certain benefits beyond the termination date at Zenith's cost. In such event, Zenith will also pay the affected Executive Officer such additional amount necessary to reimburse him or her for all payroll taxes payable on the imputed income received due to such benefit continuation. Finally, these employment agreements provide that if there is a severance payment made in connection with a termination following a change in control, Zenith will pay any affected Executive Officer such amount as necessary to reimburse him or her for the tax due on "excess golden parachute payments" as defined in Section 280G of the Code. In general, such excess payments are defined in Section 280G as amounts paid to an individual due to a change in control in excess of three times the average of that individual's income as reported by the employer on Form W-2 for the prior five years less one dollar.

Compensation Committee Report

       The Compensation Committee has reviewed and discussed the Compensation Discussion and Analysis for 2009 with Zenith's management.

       Based on this review and their discussions, the Compensation Committee has recommended to the Board of Directors that the Compensation Discussion and Analysis for 2009 be included in Zenith's Annual Report on Form 10-K and, as applicable, the Proxy Statement for the 2010 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission.

Robert J. Miller, Chairman
Catherine B. Reynolds
Alan I. Rothenberg
Michael Wm. Zavis

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Summary Compensation Table

       The Summary Compensation Table sets forth information regarding the compensation paid during the 2009, 2008 and 2007 fiscal years to the Named Executive Officers. The Named Executive Officers are Zenith's Chief Executive Officer, its Chief Financial Officer and its three other most highly compensated Executive Officers serving as of December 31, 2009.

       Except for the elements included under the All Other Compensation column in the table below, there are only three elements of compensation available for all of these individuals — salary, cash bonus and restricted stock awards. Each of these elements of compensation is described in the sections following the Summary Compensation Table entitled "Salary and Employment Agreements," "Bonus" and "Restricted Stock Awards." The components of the entries under the All Other Compensation column are set out in footnote (3) to the Summary Compensation Table.

(1)

An automobile allowance of $15,600 is included as a part of the salary reported for Ms. Van Gundy and Messrs. Miller and Jansen.

(2)

Fair value of awards of shares of restricted stock for the years indicated under the Restricted Stock Plan. (See "Restricted Stock Awards" following this table for a description of the Restricted Stock Plan.) The fair value of each award is equal to the number of restricted shares constituting the award multiplied by the NYSE closing price per share of Common Stock on the award date.

The restricted stock will vest upon the achievement of a performance goal. However, the amount shown in the table is the full fair value of the restricted stock and has not been reduced to reflect the probable outcome of achievement of the performance goal.

Forfeiture rates are not assumed or factored into the determination of the fair value of the restricted shares for the purposes of the table and the value of future dividends is assumed to be reflected in the closing price per share of Common Stock and, consequently, in the fair value of each award. Therefore, dividends paid on unvested restricted stock are not shown separately in the table. (Note that dividends will not be paid on unvested shares of restricted stock that are granted to employees, including all Executive Officers after 2009, but will be accrued and paid only upon the vesting of such shares.)

The assumption that the value of future dividends is reflected in the closing price per share of Common Stock and the fair value of each award was made only with respect to regular quarterly dividends declared and paid by Zenith. That assumption

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was not made with respect to the extra dividend of $0.40 per share that was declared and paid in December 2009 on all outstanding shares of Common Stock. Consequently, the amount of extra dividend that each Named Executive Officer received on his or her unvested restricted stock that was awarded prior to 2009 is included under the All Other Compensation column.


In compliance with the rules and regulations of the Commission, the amounts shown for restricted stock awarded in 2008 and 2007 have been changed from those shown in prior Summary Compensation Tables included in Proxy Statements to reflect the fair value of the awards in each of those years. (Previously, the amount shown in those two years were the compensation costs recognized in each of those years for all unvested shares of restricted stock then held by the Named Executive Officers.) Because of the changes to the amounts shown for restricted stock awards, the total compensation amounts for 2008 and 2007 were also changed.

(3)

Our Executive Officers do not receive company loans, country club memberships or financial planning assistance, and Zenith does not own any life insurance on their lives. The Executive Officers' health benefits (such as medical, dental and vision) and other benefits (such as group life insurance, long-term disability insurance, paid vacation time off and participation in a 401(k) Plan and employee stock purchase plan) are available to all full-time regular employees and, therefore, except for Zenith's matching contributions to the Executive Officer's contributions under Zenith's 401(k) Plan and Zenith's employee stock purchase plan, are not included in the above table. Included in the above table are the premiums paid by Zenith for the additional life insurance coverage on certain of the Named Executive Officers under the enhanced life insurance program available to all senior officers of Zenith and its subsidiaries and the amount paid by Zenith to the Named Executive Officer to reimburse him or her for federal and state income taxes payable on the imputed income received on the cost of any additional life insurance coverage. (See "Perquisites and Other Personal Benefits" under the CD&A in this Item 11 for a description of the enhanced life insurance program.)

The 2009 entries under the All Other Compensation column consist of the following amounts incurred or paid by Zenith in 2009:

Stanley R. Zax

The amount shown for Mr. Zax consists of: (a) life insurance premiums of $49,329 paid by Zenith and reimbursement of $43,308 for Mr. Zax's income tax liability on Zenith's payment of these premiums; (b) the cost of the personal use of a company-leased automobile of $22,592; and (c) the incremental cost to Zenith of $83,063 for his personal use of the corporate aircraft in compliance with Zenith's security policy. The calculation of incremental cost for personal use of the corporate aircraft includes the variable costs incurred as a result of personal flight activity (including any related empty pick-up or return flights commonly known as "deadhead flights"), such as a portion of ongoing maintenance and repairs, aircraft fuel, navigation and communications fees and any travel expenses for the flight crew. It excludes non-variable costs, such as aircraft purchase costs and depreciation, flight crew salaries, exterior paint, interior refurbishment and regularly scheduled inspections, which would have been incurred regardless of whether there was any personal use of the aircraft. Mr. Zax receives imputed income for income tax purposes on his personal usage of the corporate aircraft using Standard Industry Fare Level rates pursuant to Internal Revenue Service regulations. Mr. Zax is responsible for all taxes on this imputed income for personal aircraft usage, and he is not reimbursed for the taxes he pays.

Kari L. Van Gundy

The amount shown for Ms. Van Gundy consists of: (a) Zenith's matching contributions of $7,350 to Zenith's 401(k) Plan; (b) extra $0.40 dividend totaling $9,500 paid on her shares of unvested restricted stock; (c) life insurance premiums of $4,165 paid by Zenith under the enhanced life insurance program for all senior officers and reimbursement of $2,413 for Ms. Van Gundy's income tax liability on Zenith's payment of these premiums; and (d) Zenith's matching contribution of $3,000 under Zenith's employee stock purchase plan.

Keith E. Trotman

The amount shown for Mr. Trotman consists of: (a) Zenith's matching contributions of $7,350 to Zenith's 401(k) Plan; (b) extra $0.40 dividend totaling $8,400 paid on his shares of unvested restricted stock; and (c) the cost of the personal use of a company-leased automobile of $12,619.

Jack D. Miller

The amount shown for Mr. Miller consists of: (a) Zenith's matching contributions of $7,350 to Zenith's 401(k) Plan; (b) extra $0.40 dividend totaling $9,000 paid on his shares of unvested restricted stock; and (c) life insurance premiums of $13,230 paid by Zenith under the enhanced life insurance program for all senior officers and reimbursement of $7,664 for Mr. Miller's income tax liability on Zenith's payment of these premiums.

Michael E. Jansen

The amount shown for Mr. Jansen consists of: (a) Zenith's matching contributions of $7,350 to Zenith's 401(k) Plan; (b) extra $0.40 dividend totaling $10,000 paid on his shares of unvested restricted stock; (c) life insurance premiums of $3,521 paid by Zenith under the enhanced life insurance program for all senior officers and reimbursement of $2,039 for Mr. Jansen's income tax liability on Zenith's payment of these premiums; and (d) Zenith's matching contribution of $31,250 under Zenith's employee stock purchase plan.

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       Salary and bonus constitute a substantial portion of the total compensation received by each Executive Officer. This is pursuant to Zenith's philosophy that compensation be fair, simple and transparent, easily quantifiable and related to Zenith's performance.

Salary and Employment Agreements

       The salary shown in the Summary Compensation Table for each of Ms. Van Gundy and Messrs. Zax, Miller and Jansen is paid pursuant to employment agreements, which have all been approved by the Compensation Committee. Mr. Zax's employment agreement was amended and restated in 2008; the employment agreements of Ms. Van Gundy and Messrs. Miller and Jansen were amended and restated in 2009. (See "Amendment to the Executive Officers' Employment Agreements" under the CD&A in this Item 11 for a discussion of the changes to the employment agreements.) Mr. Trotman does not have an employment agreement. Pertinent provisions of the employment agreements, including payments due upon early termination and a change in control are set forth below and under "Early Termination of Employment and Change in Control Arrangements" in this Item 11.

Stanley R. Zax

       Stanley R. Zax, who serves as Zenith's Chairman of the Board and President (which office constitutes Zenith's Chief Executive Officer), is employed under an employment agreement effective as of December 11, 1997, which, after its latest amendment and restatement in September 2008, provides for an employment term ending on December 31, 2012 (unless further extended or renewed). Under his employment agreement, Mr. Zax is paid an annual base salary, is eligible for discretionary cash bonuses and/or cash bonuses under the Bonus Plan, is allowed personal use of the corporate aircraft for up to 125 hours per year, and is provided the exclusive use of an automobile of his choice and is entitled to certain additional benefits that are generally available to all Zenith employees. Pursuant to Mr. Zax's employment agreement, Zenith is to provide life insurance of at least $6,125,000, of which at least $5,000,000 is to be term life insurance. Currently, however, the aggregate amount of life insurance provided is $5,250,000, and Mr. Zax has consented to this lesser amount.

       The latest amendment in September 2008 to Mr. Zax's employment agreement continued his annual base salary of $2,500,000, subject to such increases as the Board or Compensation Committee may determine from time to time. Mr. Zax's annual base salary is currently $2,500,000.

       Upon the normal expiration of Mr. Zax's employment agreement or upon his retirement, a five-year consulting agreement would be entered into between Mr. Zax and Zenith, pursuant to which Zenith would provide an office, secretarial assistance, an automobile allowance, health insurance and a consulting fee in a declining amount for each year of the five-year term of $750,000, $600,000, $500,000, $400,000 and $300,000, respectively, in return for Mr. Zax's providing consulting hours of no more than 100, 75, 50, 25 and 10 hours per quarter in the first, second, third, fourth and fifth years, respectively. The consulting agreement may be terminated by Mr. Zax for any reason or by Zenith with or without cause or based on the death or disability of Mr. Zax. In the event of any such termination, consulting fee payments to Mr. Zax would cease; however, if the termination by Zenith is without cause or is based on Mr. Zax's disability, he would continue to be provided an office, secretarial assistance, an automobile allowance and health insurance for the balance of the consulting agreement term.

Kari L. Van Gundy

       Kari L. Van Gundy, who serves as Executive Vice President, Chief Financial Officer and Treasurer (which office constitutes Zenith's Chief Financial Officer) of both Zenith and Zenith Insurance is employed under an amended and restated employment agreement executed June 3, 2009. Her employment agreement provides for a term ending December 31, 2012 (unless further extended or renewed), an annual base salary of $400,000 (with increases of $50,000 on each of June 1, 2009 and 2010) plus such other increases as the Compensation Committee may establish from time to time,

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eligibility for discretionary cash bonuses and/or cash bonuses under the Bonus Plan, an automobile allowance and certain additional benefits that are generally available to all Zenith employees. Ms. Van Gundy's annual base salary is currently $450,000.

Jack D. Miller

       Jack D. Miller, who currently serves as Zenith's Executive Vice President and Zenith Insurance's President (until March 15, 2010 when he will become its Vice Chairman), is employed under an amended and restated employment agreement executed June 3, 2009, which was further amended in January 2010, naming him Vice Chairman of Zenith Insurance effective March 15, 2010. Mr. Miller's employment agreement provides for a term ending December 31, 2012 (unless further extended or renewed), an annual base salary of $700,400 with such increases as the Compensation Committee may establish from time to time, eligibility for discretionary cash bonuses and/or cash bonuses under the Bonus Plan, an automobile allowance and certain additional benefits that are generally available to all Zenith employees. Mr. Miller's annual base salary is currently $700,400.

Michael E. Jansen

       Michael E. Jansen, who serves as Executive Vice President and General Counsel of both Zenith and Zenith Insurance, is employed under an amended and restated employment agreement executed June 3, 2009. His employment agreement provides for a term ending December 31, 2012 (unless further extended or renewed), an annual base salary of $500,000 with such increases as the Compensation Committee may establish from time to time, eligibility for discretionary cash bonuses and/or cash bonuses under the Bonus Plan, an automobile allowance and certain additional benefits that are generally available to all Zenith employees. Mr. Jansen's annual base salary is currently $500,000.

Bonus

       The amounts shown in the Summary Compensation Table under the Bonus column were all paid under the Bonus Plan, except for the $1 million discretionary cash bonus paid to Mr. Trotman in 2009.

       Under the Bonus Plan, annual cash bonuses may be paid to Executive Officers based on Zenith's financial performance during the calendar year. The maximum amount of bonus potentially payable to each Executive Officer for each calendar year is determined as follows:

•

100% of his or her base salary at the beginning of the year if Zenith's workers' compensation combined ratio for such year is at least three percentage points, but less than five percentage points, below the workers' compensation industry combined ratio (in each case on a statutory accounting basis); or

•

150% of his or her base salary at the beginning of the year if Zenith's workers' compensation combined ratio for such year is at least five percentage points below the workers' compensation industry combined ratio (in each case on a statutory accounting basis);

provided, however, that, in either instance, the Compensation Committee may, in its sole discretion, on a case by case basis, reduce such bonus by any amount. Thus, although there is a performance target that establishes compensation under the Bonus Plan, the use of negative discretion results in awards of compensation as if the Bonus Plan were a discretionary plan. In determining the total amount of annual bonus award for each Executive Officer, the Compensation Committee considers and uses both cash bonuses and awards of restricted stock.

       In 2009, on a statutory accounting basis, Zenith's workers' compensation combined ratio was 113.9% and the industry's estimated combined ratio, as reported by A.M. Best Company, was 109.0%. Hence, the objective performance goal under the Bonus Plan was not met and no bonuses were payable under the Bonus Plan for 2009.

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       The Compensation Committee retains the ability to award cash bonuses from time to time separate from and outside of the Bonus Plan at its discretion, taking into account the factors used to determine base salary and such other factors it deems to be appropriate. The Compensation Committee awarded Mr. Trotman a discretionary cash bonus of $1 million outside of the Bonus Plan for 2009.

Restricted Stock Awards

       The awards of restricted stock reported in the Summary Compensation Table were made under the Restricted Stock Plan. The Restricted Stock Plan permits the awarding of restricted stock to our employees and non-employee Directors. Generally, "restricted stock" is Common Stock that may not be transferred or otherwise disposed of for a specified period of time. The Compensation Committee is responsible for administering the Restricted Stock Plan.

       Management recommends individuals to the Compensation Committee to receive awards, the terms of awards to be granted and the number of shares subject to these awards. The Compensation Committee then determines whether or not to accept management's recommendation. In making these determinations, a number of factors are taken into account, including the duties and responsibilities of the individual, the value of the individual's services to Zenith, the individual's past, present and potential contribution to Zenith's success, past awards of restricted stock and other relevant factors.

       The Compensation Committee prescribes the restrictions and conditions imposed on the restricted stock award. Beginning in 2009, in addition to time-based vesting, the Compensation Committee added performance-based vesting of restricted stock awards made to employees. The committee may, in its discretion, make an award utilizing time-based vesting or performance-based vesting or a combination of the two. Also, commencing with awards to employees in 2009, the Compensation Committee changed the manner in which dividends are paid on unvested shares of restricted stock. Rather than paying dividends on unvested shares when such dividends are declared and paid on the Common Stock, dividends declared while the restricted stock is unvested are now accrued and paid upon vesting.

       Accordingly, under the Restricted Stock Plan and the form of the restricted stock agreement that is elected to be used by the Compensation Committee in its discretion, awards of restricted stock granted to employees in 2009 and after will become vested either on a time basis or a performance basis, as follows:

Time-based vesting

•

50% of the shares subject to such award will vest no earlier than two (2) years after the date of grant; and

•

The remaining 50% of the shares subject to such award will vest no earlier than four (4) years after the date of grant.

Performance-based vesting

•

All of the shares will become vested upon the determination that the statutory combined ratio of Zenith's workers' compensation operations for the three calendar years following the year in which the award is made is at least five percentage points below the average of the industry's combined ratio for same three calendar years, with such determination expected to be made by February 15 following the end of the third calendar year.

In either case, the recipient must be an employee on the applicable vesting date in order to be vested in the shares.

       Under the compensation arrangement for non-employee Directors, each non-employee Director will receive an annual award of 2,500 shares of restricted stock upon his or her election at the Annual Meeting of Stockholders. The 2,500 shares will vest 833 shares on each of the first two anniversaries of the award date and 834 shares on the third anniversary of the award date, provided the recipient is

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serving as a Director on the applicable vesting date. If a Director is appointed at other than an Annual Meeting of Stockholders, the number of shares of restricted stock granted at the time of such appointment will be adjusted proportionately downward in order to reflect the period of time until the next Annual Meeting of Stockholders, at which time the annual 2,500 shares will be granted.

       In general, the recipient of a restricted stock award has the rights of a holder of Common Stock, including the right to vote the shares and to receive dividends. (Employees granted awards before 2009 and non-employee Directors receive dividends as they are declared and paid on the Common Stock; employees granted awards in 2009 and later will receive dividends declared and paid on the Common Stock during the vesting period only if and at the time such shares become vested.)

       Under the terms of the Restricted Stock Plan, an award of restricted stock will automatically become fully vested upon the participant's death or termination of employment or service due to disability. In addition, vesting will accelerate pursuant to the employment agreements of Ms. Van Gundy and Messrs. Zax, Miller and Jansen upon a change in control as defined in their employment agreements. (Mr. Zax does not hold any restricted stock.) Pursuant to the Restricted Stock Plan, the Compensation Committee has the right to provide for acceleration of the vesting of an award in its discretion based upon factors it determines appropriate including, but not limited to, the attainment of certain performance-related goals, the termination of the recipient's employment or service with Zenith or change in control; provided, however, that the Compensation Committee can only waive restrictions it has established in certain limited circumstances.

       In addition, in the event of a change in control of Zenith, unless an award of restricted stock is assumed by the successor corporation or substituted with an equivalent award, the restricted stock will become fully vested and free of restrictions. A "change in control" of Zenith is defined in the Restricted Stock Plan and generally includes any of the following:

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a person or entity becomes the owner of 50% or more of the voting stock of Zenith;

•

a majority of the Board is replaced by directors who were not approved or recommended by the incumbent Board;

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Zenith's stockholders approve a plan of complete liquidation or dissolution of Zenith;

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a sale of all or substantially all of the assets of Zenith; or

•

a merger or consolidation with any other corporation.

Grants of Plan-Based Awards in 2009

       The number of shares of restricted stock awarded to the Named Executive Officers under the Restricted Stock Plan in 2009 and the fair values of such awards were:

Other than the Restricted Stock Plan, Zenith has no other plans under which equity grants may be made.

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Outstanding Equity Awards at 2009 Year-End

       None of the Named Executive Officers holds any outstanding stock options. The only equity awards held by them are shares of restricted stock. At December 31, 2009, the number of shares of unvested restricted stock and their market value are set out in the following table. Market value is based on the NYSE closing price of $29.76 per share of Common Stock on December 31, 2009.

       The vesting dates for the unvested shares held at December 31, 2009 by Ms. Van Gundy and Messrs. Trotman, Miller and Jansen are:

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