Exhibit 99.1

KCG ANNOUNCES FOURTH QUARTER RESULTS

KCG reported a GAAP net loss of $17.4 million; the pre-tax loss from

continuing operations of $18.0 million included $36.5 million

in certain merger and integration costs

Based on progress to date in the integration, on an annualized run-rate basis

KCG achieved the upper range of the projected $90 to $110 million

in cost synergies by the end of 2013

During the quarter, KCG completed $300 million in principal debt repayments;

future savings of approximately $17 million in annual pre-tax interest expense

will be additive to cost synergies

JERSEY CITY, New Jersey – January 31, 2014 – KCG Holdings, Inc. (NYSE: KCG) today reported GAAP net loss of $17.4 million, or a loss of $0.15 per diluted share, for the fourth quarter of 2013.

The fourth quarter 2013 GAAP net loss includes net loss from continuing operations of $18.3 million, or a loss of $0.16 per diluted share. The fourth quarter pre-tax loss from continuing operations was $18.0 million which includes the writeoff of capitalized debt costs related to principal repayments of debt, costs associated with a reduction in the global workforce and merger-related expenses and writedowns totaling $36.5 million. Excluding these charges, on a non-GAAP basis, fourth quarter 2013 income from continuing operations before income taxes was $18.5 million. A reconciliation of GAAP to non-GAAP results is included in Exhibit 4.

KCG was formed July 1, 2013 as a result of the merger between Knight Capital Group, Inc. and GETCO Holding Company, LLC (“the Merger”). Financial results for the periods prior to the third quarter of 2013 contained herein solely represent the results of GETCO Holding Company, LLC as the accounting acquirer. Within this announcement, descriptions of the comparative financial results for the three months ended December 31, 2013 to the three months ended December 31, 2012, have been excluded as KCG does not believe the information provides for a meaningful comparison.

Select Financial Results

Fourth Quarter Highlights

Daniel Coleman, Chief Executive Officer of KCG, said, “During the fourth quarter, KCG again delivered positive financial results on an operating basis. We continued efforts to bring the firm’s assets and resources into alignment and achieved the projected cost synergies from the merger well ahead of schedule, with additional savings yet to be realized. In addition, we began aggressively paying down debt. We’re intent on becoming the leading, independent, global, multi-asset class securities firm. And, while much work remains, we’re grateful for all that has been accomplished at such an early stage.”

Market Making

During the fourth quarter, the Market Making segment generated total revenues of $232.5 million and pre-tax income of $48.0 million, which included $5.3 million in compensation costs related to the reduction in force. Excluding these charges, non-GAAP pre-tax earnings from the Market Making segment was $53.2 million.

This segment encompasses direct-to-client and on-exchange market making across multiple asset classes and is an active participant in all major cash, options and futures markets in the U.S. and Europe. During the quarter, KCG was the industry leader in executing retail U.S. equity shares traded among market makers and the sequential rise in overall retail trading activity positively impacted revenue capture per dollar value traded. Weaker market conditions however in certain classes of global equities, fixed income and currencies, in terms of market volumes and related volatility, constrained the results for the quarter.

Select Trade Statistics: U.S. Equity Market Making

Global Execution Services

During the fourth quarter, the Global Execution Services segment generated total revenues of $84.1 million and a pre-tax loss of $4.5 million, which included $7.1 million in compensation costs related to the reduction in force and asset writedown charges. Excluding these items, non-GAAP pre-tax earnings from the Global Execution Services segment was $2.6 million.

The Global Execution Services segment comprises agency execution services and trading venues. During the quarter, the positive turn in financial results was attributable in part to a marked improvement in institutional equity sales in the U.S. and U.K. as well as increased contributions from KCG Hotspot and KCG BondPoint. The results for the quarter were impacted to a degree by the rebuilding underway in KCG’s ETF business.

Select Trade Statistics: Agency Execution and Trading Venues

Corporate and Other

The Corporate and Other segment includes strategic investments and corporate overhead expenses. During the fourth quarter, the Corporate and Other segment recorded total revenues of $5.5 million and a pre-tax loss of $61.5 million, which included approximately $24.2 million in writeoff of capitalized debt costs related to pay down of debt, asset writedown and lease losses, professional fees associated with the Merger and Knight’s August 1, 2012 technology issue and compensation costs related to a reduction in force.

Financial Condition

As of December 31, 2013, KCG had approximately $674.3 million in cash and cash equivalents. Total outstanding debt was approximately $657 million. The company had $1.5 billion in stockholders’ equity equivalent to a book value of $12.33 per share and tangible book value of $10.67 per share.

KCG’s headcount at December 31, 2013 was 1,229 full-time employees as compared to 1,304 full-time employees at September 30, 2013, excluding employees of Urban. As of July 1, 2013 KCG’s consolidated headcount was 1,397 full-time employees, excluding employees of Urban.

Integration Update

As a result of the rapid progress to date in the integration, KCG achieved the upper range of the projected cost synergies on an annualized run-rate basis from the merger by the end of 2013 primarily from reductions in compensation expense. KCG previously estimated cost synergies from the merger of $90 to $110 million per year when fully realized within three years of the merger close, which occurred July 1, 2013.

Subsequent Events

Subsequent to the fourth quarter of 2013, BATS Global Markets Inc. and Direct Edge Holdings LLC announced plans to pay certain dividends to shareholders contingent on the completion of their pending merger. As a shareholder in both BATS and Direct Edge, KCG expects to receive approximately $41.0 million from the aggregate dividends paid at the close of the merger, which is expected in the first quarter of 2014.

In addition, on January 22, 2014, KCG completed an additional $100 million principal repayment on the Company’s $535 million first lien term loan. KCG has completed a total of $400 million in principal repayments since entering into the loan on July 1, 2013, fully satisfying the amortization payment of $235 million due on July 1, 2014 and leaving a remaining outstanding balance of $135 million.

Conference Call

KCG will hold a conference call to discuss fourth quarter 2013 financial results starting at 9:00 a.m. Eastern Time today, January 31, 2014. To access the call, dial 888-811-5445 (domestic) or 816-581-1703 (international) and enter passcode 3553273. In addition, the call will be webcast at http://investors.kcg.com/phoenix.zhtml?c=105070&p=irol-EventDetails&EventId=5086915. Following the conclusion of the call, a replay will be available by dialing 888-203-1112 (domestic) or 719-457-0820 (international) and entering passcode 3553273.

Additional information for investors can be found at http://investors.kcg.com.

Non-GAAP Financial Presentations

KCG believes that certain non-GAAP financial presentations, when taken into consideration with the corresponding GAAP financial presentations, are important in understanding operating results. Selected financial information is included in the non-GAAP financial presentations for the

three months ended September 30, 2013 and three and twelve months ended December 31, 2013 and 2012. KCG believes the presentations provide a meaningful summary of results of operations for the three months ended September 30, 2013 and three and twelve month periods ended December 31, 2013 and 2012. Reconciliations of GAAP to non-GAAP results are included in the schedules in Exhibit 4.

About KCG

KCG is a leading independent securities firm offering investors and clients a range of services designed to address trading needs across asset classes, product types and time zones. The firm combines advanced technology with exceptional client service across market making, agency execution and venues. KCG has multiple access points to trade global equities, fixed income, currencies and commodities via voice or automated execution. www.kcg.com

Certain statements contained herein may constitute “forward-looking statements” within the meaning of the safe harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995. Forward-looking statements are typically identified by words such as “believe,” “expect,” “anticipate,” “intend,” “target,” “estimate,” “continue,” “positions,” “prospects” or “potential,” by future conditional verbs such as “will,” “would,” “should,” “could” or “may,” or by variations of such words or by similar expressions. These “forward-looking statements” are not historical facts and are based on current expectations, estimates and projections about KCG’s industry, management beliefs and certain assumptions made by management, many of which, by their nature, are inherently uncertain and beyond our control. Any forward-looking statement contained herein speaks only as of the date on which it is made. We undertake no obligation to publicly update any forward-looking statement, whether written or oral, that may be made from time to time, whether as a result of new information, future developments or otherwise. Accordingly, readers are cautioned that any such forward-looking statements are not guarantees of future performance and are subject to certain risks, uncertainties and assumptions that are difficult to predict including, without limitation, risks associated with: (i) the strategic combination of Knight Capital Group, Inc. (“Knight”) and GETCO Holding Company, LLC (“GETCO”), including, among other things, (a) difficulties and delays in integrating the Knight and GETCO businesses or fully realizing cost savings and other benefits, (b) the inability to sustain revenue and earnings growth, and (c) customer and client reactions; (ii) the August 1, 2012 technology issue that resulted in Knight’s broker-dealer subsidiary sending numerous erroneous orders in NYSE-listed and NYSE Arca securities into the market and the impact to Knight’s capital structure and business as well as actions taken in response thereto and consequences thereof; (iii) the costs and risks associated with the sale of Knight’s institutional fixed income sales and trading business, the sale of KCG’s reverse mortgage origination and securitization business and the departure of the managers of KCG’s listed derivatives group; (iv) changes in market structure, legislative, regulatory or financial reporting rules, including the continuing legislative and regulatory scrutiny of high-frequency trading; (v) past or future changes to organizational structure and management; (vi) KCG’s ability to develop competitive new products and services in a timely manner and the acceptance of such products and services by KCG’s customers and potential customers; (vii) KCG’s ability to keep up with technological changes; (viii) KCG’s ability to effectively identify and manage market risk, operational and technology risk, legal risk, liquidity risk, reputational risk, counterparty and credit risk, international risk, regulatory risk, and compliance risk; (ix) the cost and other effects of material contingencies, including litigation contingencies, and any adverse judicial, administrative or arbitral rulings or proceedings; and (x) the effects of increased competition and KCG’s ability to maintain and expand market share. The list above is not exhaustive. Readers should carefully review the risks and uncertainties disclosed in KCG’s and Knight’s reports with the SEC, including, without limitation, those detailed under “Certain Factors Affecting Results of Operations” in KCG’s Quarterly Report on Form 10-Q for the period ended September 30, 2013, under “Risk Factors” in Knight’s Annual Report on Form 10-K for the year-ended December 31, 2012 and the Current Report on Form 8-K filed by KCG on November 12, 2013, and in other reports or documents KCG files with, or furnishes to, the SEC from time to time.

CONTACTS

CONSOLIDATED STATEMENTS OF OPERATIONS⁽¹⁾

(Unaudited)

CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION

(Unaudited)

PRE-TAX EARNINGS FROM CONTINUING OPERATIONS BY BUSINESS SEGMENT*

(In thousands)

(Unaudited)

Fourth and third quarter 2013 includes the results of KCG Holdings, Inc

Fourth quarter 2012 reflect solely the results of GETCO Holding Company, LLC.

Regulation G Reconciliation of Non-GAAP financial measures (Continuing operations)⁽¹⁾

(in thousands)

Fourth quarter 2012 reflect solely the results of GETCO Holding Company, LLC.