SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No.    )*

BMC Stock Holdings, Inc.

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

05591B109

(CUSIP Number)

Christopher Shackelton/Adam Gray

105 Rowayton Avenue

Rowayton, CT 06853

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

November 4, 2019

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §240.13d-1(e), §240.13d-1(f) or §240.13d-1(g), check the following box. ☐

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

Item 1. Security and Issuer.

This Schedule 13D (this “Schedule 13D”) relates to the common stock, par value $0.01 per share (the “Common Stock”), of BMC Stock Holdings, Inc. (the “Issuer”), a Delaware corporation. The principal executive offices of the Issuer are located at 8020 Arco Corporate Drive, Suite 400, Raleigh, North Carolina, 27617.

Item 2. Identity and Background.

The persons filing this statement and the persons enumerated in Instruction C of Schedule 13D and, where applicable, their respective places of organization, general partners, directors, executive officers and controlling persons and the information regarding them, are as follows:

The foregoing persons are hereinafter sometimes collectively referred to as the “Reporting Persons”.

CCM is the investment adviser to CCP, which is an investment limited partnership. CC is the General Partner of CCP. Gray and Shackelton are the managers of CC and CCM.

Item 3. Source and Amount of Funds or Other Consideration.

The source and amount of funds used in purchasing the Common Stock by the Reporting Persons and a separate account investment advisory client of CCM (the “Separate Account”) were as follows:

Item 4. Purpose of Transaction.

The Reporting Persons acquired the Common Stock for investment purposes, and such purposes were made in the Reporting Persons’ ordinary course of business. In pursuing such investment purposes, the Reporting Persons may further purchase, hold, vote, trade, dispose or otherwise deal in the Common Stock at times, and in such manner (including pursuant to hedging transactions), as they deem advisable to benefit from changes in market prices of the Common Stock, changes in the Issuer’s operations, business strategy or prospects, or from a sale or merger of the Issuer. To evaluate such alternatives, the Reporting Persons routinely will monitor the Issuer’s operations, prospects, business development, management, competitive and strategic matters, capital structure, and prevailing market conditions, as well as alternative investment opportunities, liquidity requirements of the Reporting Persons and other investment considerations. Consistent with their investment research methods and evaluation criteria, the Reporting Persons may discuss such matters with management or directors of the Issuer, other shareholders, industry analysts, existing or potential strategic partners or competitors, investment and financing professionals, sources of credit and other investors. Such factors and discussions may materially affect, and result in, the Reporting Persons’ modifying their ownership of the Common Stock, exchanging information with the Issuer pursuant to appropriate confidentiality or similar agreements, proposing changes in the Issuer’s operations, governance or capitalization, or in proposing one or more of the other actions described in paragraphs (a) through (j) of Item 4 of Schedule 13D. The Reporting Persons reserve the right to formulate other plans and/or make other proposals, and take such actions with respect to their investment in the Issuer, including any or all of the actions set forth in paragraphs (a) through (j) of Item 4 of Schedule 13D, or acquire additional shares of Common Stock or dispose of all shares of Common Stock beneficially owned by them, in public market or privately negotiated transactions. The Reporting Persons may at any time reconsider and change their plans or proposals relating to the foregoing.

Item 5. Interest in Securities of the Issuer.

(a) – (b) The information relating to the beneficial ownership of Common Stock by each of the Reporting Persons set forth in Rows 7 through 13 of the cover pages hereto is incorporated by reference herein. The percentages set forth in Row 13 of all the cover pages filed herewith are calculated based upon 66,749,662 shares of Common Stock outstanding as of November 4, 2019, as reported in the Issuer’s Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 5, 2019.

The information in Items 4 and 6 hereof is incorporated by reference herein.

Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.

CCM is an investment adviser whose clients, including CCP and the Separate Account, have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the Common Stock. CC is the general partner of CCP. Gray and Shackelton are the managers of CC and CCM.

The Reporting Persons are parties to an agreement with respect to the joint filing of this Schedule 13D and any amendments hereto. A copy of such agreement is attached as Exhibit 1 to this Schedule 13D and is incorporated by reference herein.

The information in Item 4 is incorporated by reference herein.

Item 7. Material to Be Filed as Exhibits.

SIGNATURES

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

DATED: November 14, 2019

Exhibit 1

JOINT FILING AGREEMENT

PURSUANT TO RULE 13d-1(k)

This joint filing agreement is made pursuant to Rule 13d-l(k)(1) under the Securities and Exchange Act of 1934, as amended (the “Act”), by and among the parties listed below, each referenced to herein as a “Joint Filer”. The Joint Filers agree that a statement of beneficial ownership as required by Sections 13(g) or 13(d) of the Act and the Rules thereunder may be filed on each of their behalf on Schedule 13G or Schedule 13D, as appropriate, and that said joint filing may thereafter be amended by further joint filings. The Joint Filers state that they each satisfy the requirements for making a joint filing under Rule 13d-1.

DATED: November 14, 2019