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 the earliest event reported): November 7, 2018

K2M GROUP HOLDINGS, INC.

(Exact name of registrant as specified in its charter)

600 Hope Parkway SE

Leesburg, Virginia 20175

(Address of principal executive offices, including zip code)

Registrant’s telephone number, including area code: (703) 777-3155

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 as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company  ☐

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.  ☐

On November 7, 2018, K2M Group Holdings, Inc. (“K2M”) received notice that the U.S. Federal Trade Commission granted early termination, effective immediately, of the applicable waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended (the “HSR Act”), in connection with the proposed merger of Austin Merger Sub Corp. (“Merger Sub”) with and into K2M (the “Merger”), pursuant to the Agreement and Plan of Merger, dated as of August 29, 2018 (the “Merger Agreement”), by and among K2M, Stryker Corporation and Merger Sub.

The early termination of the waiting period under the HSR Act satisfies one of the conditions to the closing of the Merger, which remains subject to the satisfaction or waiver of other customary closing conditions set forth in the Merger Agreement. The Merger is expected to be consummated on November 9, 2018, subject to the satisfaction or waiver of such other customary closing conditions.

Forward-Looking Statements

The foregoing contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. We intend for these forward-looking statements to be covered by the safe harbor provisions of the federal securities laws relating to forward-looking statements. These forward-looking statements include statements relating to the expected timing, completion and effects of the proposed merger, as well as other statements representing management’s beliefs about, future events, transactions, strategies, operations and financial results, including, without limitation, our expectations with respect to the costs and other anticipated financial impacts of the merger; future financial and operating results of K2M Group Holdings, Inc. (“K2M”); K2M’s plans, objectives, expectations and intentions with respect to future operations and services; required approvals to complete the merger by our stockholders and by governmental regulatory authorities, and the timing and conditions for such approvals; the stock price of K2M prior to the consummation of the transactions; and the satisfaction of the closing conditions to the proposed merger. Such forward-looking statements often contain words such as “assume,” “will,” “anticipate,” “believe,” “predict,” “project,” “potential,” “contemplate,” “plan,” “forecast,” “estimate,” “expect,” “intend,” “is targeting,” “may,” “should,” “would,” “could,” “goal,” “seek,” “hope,” “aim,” “continue” and other similar words or expressions or the negative thereof or other variations thereon. Forward-looking statements are made based upon management’s current expectations and beliefs and are not guarantees of future performance. Such forward-looking statements involve numerous assumptions, risks and uncertainties that may cause actual results to differ materially from those expressed or implied in any such statements. Our actual business, financial condition or results of operations may differ materially from those suggested by forward-looking statements as a result of risks and uncertainties which include, among others, those risks and uncertainties described in any of our filings with the Securities and Exchange Commission (the “SEC”). Certain other factors which may impact our business, financial condition or results of operations or which may cause actual results to differ from such forward-looking statements are discussed or included in our periodic reports filed with the SEC and are available on our website at www.k2m.com under “Investor Relations.” You are urged to carefully consider all such factors. Although it is believed that the expectations reflected in such forward-looking statements are reasonable and are expressed in good faith, such expectations may not prove to be correct and persons reading this Current Report on Form 8-K are therefore cautioned not to place undue reliance on these forward-looking statements which speak only to expectations as of the date of this Current Report on Form 8-K. We do not undertake or plan to update or revise forward-looking statements to reflect actual results, changes in plans, assumptions, estimates or projections, or other circumstances occurring after the date of this communication, even if such results, changes or circumstances make it clear that any forward-looking information will not be realized. If we make any future public statements or disclosures which modify or impact any of the forward-looking statements contained in or accompanying this Current Report on Form 8-K, such statements or disclosures will be deemed to modify or supersede such statements in this Current Report on Form 8-K.

About K2M Group Holdings, Inc.

K2M Group Holdings, Inc. is a global leader of complex spine and minimally invasive solutions focused on achieving three-dimensional Total Body Balance^™. Since its inception, K2M has designed, developed, and commercialized innovative complex spine and minimally invasive spine technologies and techniques used by spine surgeons to treat some of the most complicated spinal pathologies. K2M has leveraged these core competencies into

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Balance ACS^®, a platform of products, services, and research to help surgeons achieve three-dimensional spinal balance across the axial, coronal, and sagittal planes, with the goal of supporting the full continuum of care to facilitate quality patient outcomes. The Balance ACS platform, in combination with the Company’s technologies, techniques and leadership in the 3D-printing of spinal devices, enables K2M to compete favorably in the global spine surgery market. For more information, please visit: www.K2M.com.

From time to time, K2M may use its website as a distribution channel of material company information. Financial and other important information regarding the Company is routinely accessible through and posted on its website at www.investors.k2m.com.

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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.

Dated: November 7, 2018