As filed with the Securities and Exchange Commission on October 2, 2014

Registration No. 333-198724

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

AMENDMENT NO. 1

TO

FORM S-1

REGISTRATION STATEMENT

UNDER THE SECURITIES ACT OF 1933

FRESHPET, INC.

(Exact name of registrant as specified in its charter)

400 Plaza Drive, 1st Floor

Secaucus, New Jersey 07094

(201) 520-4000

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Richard Kassar

Chief Financial Officer

400 Plaza Drive, 1st Floor

Secaucus, New Jersey 07094

(201) 520-4000

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies of all communications, including communications sent to agent for service, should be sent to:

Approximate date of commencement of proposed sale to the public:

As soon as practicable after this Registration Statement becomes effective.

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, check the following box:  ¨

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ¨

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities act registration statement number of the earlier effective registration statement for the same offering.  ¨

If this Form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

CALCULATION OF REGISTRATION FEE

The registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933, as amended, or until this Registration Statement shall become effective on such date as the Securities and Exchange Commission, acting pursuant to said Section 8(a), may determine.

Explanatory Note

This Amendment No. 1 to the Registration Statement on Form S-1 of Freshpet, Inc. is being filed solely for the purpose of filing Exhibits 5.1, 10.5, 23.2, 99.1, 99.2, 99.3 and 99.4 hereto. No changes have been made to Part I of the Registration Statement. Accordingly, Part I has been omitted from this amendment.

PART II—INFORMATION NOT REQUIRED IN PROSPECTUS

Item 13. Other Expenses of Issuance and Distribution.

The following table sets forth all costs and expenses, other than the underwriting discounts payable by us, in connection with the offer and sale of the common stock being registered. All amounts shown are estimates except for the Securities and Exchange Commission (“SEC”) registration fee and the Financial Industry Regulatory Authority, Inc. (“FINRA”) filing fee.

Item 14. Indemnification of Officers and Directors.

Section 102(b)(7) of the DGCL allows a corporation to provide in its certificate of incorporation that a director of the corporation shall not be personally liable to the corporation or its stockholders for monetary damages for breach of fiduciary duty as a director, except where the director breached the duty of loyalty, failed to act in good faith, engaged in intentional misconduct or knowingly violated a law, authorized the payment of a dividend or approved a stock repurchase in violation of Delaware corporate law or obtained an improper personal benefit. Our Certificate of Incorporation will provide for this limitation of liability.

Section 145 of the DGCL (“Section 145”), provides that a Delaware corporation may indemnify any person who was, is or is threatened to be made, party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of such corporation), by reason of the fact that such person is or was an officer, director, employee or agent of such corporation or is or was serving at the request of such corporation as a director, officer, employee or agent of another corporation or enterprise. The indemnity may include expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by such person in connection with such action, suit or proceeding, provided such person acted in good faith and in a manner he reasonably believed to be in or not opposed to the corporation’s best interests and, with respect to any criminal action or proceeding, had no reasonable cause to believe that his or her conduct was illegal. Where an officer or director is successful on the merits or otherwise in the defense of any action referred to above, the corporation must indemnify him against the expenses which such officer or director has actually and reasonably incurred.

Section 145 further authorizes a corporation to purchase and maintain insurance on behalf of any person who is or was a director, officer, employee or agent of the corporation or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation or enterprise, against any liability asserted against him and incurred by him in any such capacity, or arising out of his or her status as such, whether or not the corporation would otherwise have the power to indemnify him under Section 145.

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Our Certificate of Incorporation will provide that we must indemnify our directors and officers to the fullest extent authorized by the DGCL and must also pay expenses incurred in defending any such proceeding in advance of its final disposition upon delivery of an undertaking, by or on behalf of an indemnified person, to repay all amounts so advanced if it should be determined ultimately that such person is not entitled to be indemnified under this section or otherwise.

We intend to enter into indemnification agreements with each of our current directors and officers. These agreements will require us to indemnify these individuals to the fullest extent permitted under Delaware law against liabilities that may arise by reason of their service to us, and to advance expenses incurred as a result of any proceeding against them as to which they could be indemnified.

The indemnification rights set forth above shall not be exclusive of any other right which an indemnified person may have or hereafter acquire under any statute, provision of our Certificate of Incorporation, our Bylaws, agreement, vote of stockholders or disinterested directors or otherwise.

We maintain standard policies of insurance that provide coverage (1) to our directors and officers against loss rising from claims made by reason of breach of duty or other wrongful act and (2) to us with respect to indemnification payments that we may make to such directors and officers.

The proposed form of underwriting agreement to be filed as Exhibit 1.1 to this Registration Statement provides for indemnification to our directors and officers by the underwriters against certain liabilities.

Item 15. Recent Sales of Unregistered Securities

We sold 2,472,518 shares of Series C Preferred Stock to existing stockholders in the time period since January 1, 2011 in exchange for an aggregate of $17,550,974. In the time period since January 1, 2011, we issued to directors, officers, employees and contractors options to purchase an aggregate of 2,187,739 shares of common stock with exercise prices of $7.10 per share pursuant to the 2010 Plan. In the time period since January 1, 2011, upon the exercise of stock options, we have issued 7,952 shares of common stock to certain officers, directors, employees and contractors in exchange for an aggregate of $49,889. No underwriters were used in connection with the transactions. The sale of such securities was exempt from registration pursuant to Section 4(a)(2) of the Securities Act as transactions by an issuer not involving a public offering and/or Rule 506 promulgated under the Securities Act. All of the purchasers in these transactions represented to us in connection with their purchase that they were acquiring the shares for investment and not distribution, and that they could bear the risks of the investment and could hold the securities for an indefinite period of time. Such purchasers received written disclosures that the securities had not been registered under the Securities Act and that any resale must be made pursuant to a registration or an available exemption from such registration. All of the foregoing securities are deemed restricted securities for the purposes of the Securities Act.

Item 16. Exhibits

The exhibit index attached hereto is incorporated herein by reference.

No financial statement schedules are provided because the information called for is not required or is shown in the financial statements or the notes thereto.

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Item 17. Undertakings

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized in the City of Secaucus, State of New Jersey, on October 2, 2014.

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Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons on October 2, 2014 in the capacities indicated.

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EXHIBIT INDEX

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