UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): December 7, 2018

OrthoPediatrics Corp.

(Exact name of registrant as specified in its charter)

Delaware

(State or other jurisdiction of incorporation)

Registrant’s telephone number, including area code: (574) 268-6379

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 under the Securities Act (17 CFR 230.405) or Rule 12b-2 under the Exchange Act (17 CFR 240.12b-2).

Emerging growth company x

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act x

Item 1.01. Entry Into a Material Definitive Agreement.

On December 7, 2018, OrthoPediatrics Corp. (the “Company”) entered into an underwriting agreement (the “Underwriting Agreement”) with Piper Jaffray & Co. and Stifel, Nicolaus & Company, Incorporated, acting as representatives of the several underwriters named therein (collectively, the “Underwriters”), in connection with the underwritten public offering by the Company (the “Offering”) of 1,500,000 shares (the “Shares”) of the Company’s common stock, par value $0.00025 per share (the “Common Stock”). The price to the public is $27.00 per Share, and the Underwriters have agreed to purchase the Shares from the Company pursuant to the Underwriting Agreement at a price of $25.38 per Share. Pursuant to the Underwriting Agreement, the Company granted the Underwriters a 30-day option to purchase up to an additional 225,000 shares of Common Stock (the “Additional Shares”) on the same terms. The net proceeds from the sale of the Shares, after deducting the Underwriters’ discount and other estimated offering expenses payable by the Company, are expected to be approximately $37.7 million.

The Offering is being conducted pursuant to the Company’s shelf registration statement on Form S-3 (Registration No. 333-228103) filed with the Securities and Exchange Commission (the “SEC”) under the Securities Act of 1933, as amended (the “Securities Act”), and declared effective on November 9, 2018. A preliminary prospectus supplement, dated December 7, 2018, relating to the Offering has been filed with the SEC. The closing of the Offering is expected to occur on or about December 11, 2018, subject to customary closing conditions.

The Underwriting Agreement contains customary representations, warranties and covenants by the Company, as well as customary indemnification obligations of the Company and the Underwriters, including for liabilities under the Securities Act, other obligations of the parties and termination provisions.

The Underwriting Agreement has been filed as an exhibit hereto. It is not intended to provide any other factual information about the Company. The representations, warranties and covenants contained in the Underwriting Agreement were made only for purposes of the Underwriting Agreement and as of specific dates, were solely for the benefit of the parties to the Underwriting Agreement, and may be subject to limitations agreed upon by the contracting parties, including being qualified by confidential disclosures exchanged between the parties in connection with the execution of the Underwriting Agreement.

The foregoing description of the Underwriting Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Underwriting Agreement, which is filed as Exhibit 1.1 to this Current Report and is incorporated herein by reference.

A copy of the legal opinion and consent of Bingham Greenebaum Doll LLP, counsel to the Company, with respect to the legality of the issuance and sale of Shares and the Additional Shares in the Offering is filed as Exhibit 5.1 to this Current Report.

Cautionary Note on Forward-Looking Statements

This Current Report contains forward-looking statements within the meaning of the U.S. Private Securities Litigation Reform Act of 1995 and other federal securities laws. Any statements contained herein that do not describe historical facts, including but not limited to statements related to the timing and completion of the Offering and the amount of net proceeds expected from the Offering are forward-looking statements that involve risks and uncertainties that could cause actual results to differ materially from those discussed in such forward-looking statements. Such risks and uncertainties include, among others, the, as risks detailed from time to time in the Company’s SEC filings, including those described under “Risk Factors” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017, as well as those discussed in the preliminary prospectus supplement and accompanying prospectus related to the Offering, the documents incorporated by reference herein and therein, any related free writing prospectus, and subsequent filings with the SEC. Any of these risks and uncertainties could materially and adversely affect the Company’s results of operations. The Company cautions you not to place undue reliance on any forward-looking statements, which speak only as of the date they are made. The Company undertakes no obligation to update publicly any forward-looking statements to reflect new information, events or circumstances after the date they were made or to reflect the occurrence of unanticipated events.

Item 8.01. Other Events.

On December 7, 2018, the Company issued a press release announcing the pricing of the Offering. A copy of this press release is attached as Exhibit 99.1 to this Current Report and is incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits.

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SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.