SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

CompoSecure, Inc.

(Name of Issuer)

Class A Common Stock, par value $0.0001 per share

(Title of Class of Securities)

20459V105

(CUSIP Number)

Attn: General Counsel
360 North Crescent Drive, South Building,
Beverly Hills, CA, 90210
(310) 712-1850

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

01/12/2026

(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. Checkbox not checked

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).

SCHEDULE 13D

CUSIP No.

20459V105

Name of reporting person

Platinum Equity, LLC

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 52,829,757.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 52,829,757.00

Aggregate amount beneficially owned by each reporting person

52,829,757.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

18.3 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

Limited Liability Company

SCHEDULE 13D

CUSIP No.

20459V105

Name of reporting person

Platinum Equity Investment Holdings, LLC

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 52,829,757.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 52,829,757.00

Aggregate amount beneficially owned by each reporting person

52,829,757.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

18.3 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

Limited Liability Company

SCHEDULE 13D

CUSIP No.

20459V105

Name of reporting person

Platinum Equity Investment Holdings IC (Cayman), LLC

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 52,829,757.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 52,829,757.00

Aggregate amount beneficially owned by each reporting person

52,829,757.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

18.3 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

Limited Liability Company

SCHEDULE 13D

CUSIP No.

20459V105

Name of reporting person

Platinum Equity InvestCo, L.P.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

CAYMAN ISLANDS

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 52,829,757.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 52,829,757.00

Aggregate amount beneficially owned by each reporting person

52,829,757.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

18.3 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

CUSIP No.

20459V105

Name of reporting person

Platinum Equity Investment Holdings IV, LLC

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 52,829,757.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 52,829,757.00

Aggregate amount beneficially owned by each reporting person

52,829,757.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

18.3 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

Limited Liability Company

SCHEDULE 13D

CUSIP No.

20459V105

Name of reporting person

Platinum Equity Investment Holdings IV (Cayman), LLC

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 52,829,757.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 52,829,757.00

Aggregate amount beneficially owned by each reporting person

52,829,757.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

18.3 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

Limited Liability Company

SCHEDULE 13D

CUSIP No.

20459V105

Name of reporting person

Platinum Equity Partners International IV (Cayman), L.P.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

CAYMAN ISLANDS

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 52,829,757.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 52,829,757.00

Aggregate amount beneficially owned by each reporting person

52,829,757.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

18.3 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

CUSIP No.

20459V105

Name of reporting person

PE Titan CS Holdings, L.P.

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 52,829,757.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 52,829,757.00

Aggregate amount beneficially owned by each reporting person

52,829,757.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

18.3 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

CUSIP No.

20459V105

Name of reporting person

Tom Gores

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 52,829,757.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 52,829,757.00

Aggregate amount beneficially owned by each reporting person

52,829,757.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

18.3 %

Type of Reporting Person (See Instructions)

SCHEDULE 13D

Item 1.

Security and Issuer

(a)

Title of Class of Securities:

Class A Common Stock, par value $0.0001 per share

(b)

Name of Issuer:

CompoSecure, Inc.

(c)

Address of Issuer's Principal Executive Offices:

309 Pierce Street, Somerset, NEW JERSEY , 08873.

Item 2.

Identity and Background

(a)

The Schedule 13D is being filed by the following individuals (each a "Reporting Person" and collectively, the "Reporting Persons"): Platinum Equity, LLC Platinum Equity Investment Holdings, LLC Platinum Equity Investment Holdings IC (Cayman), LLC Platinum Equity InvestCo, L.P. Platinum Equity Investment Holdings IV, LLC Platinum Equity Investment Holdings IV (Cayman), LLC Platinum Equity Partners International IV (Cayman), L.P. PE Titan CS Holdings, L.P. Tom Gores The executive officers of Platinum Equity, LLC are set forth in Exhibit 99.1 to this Schedule 13D (collectively, the "Related Persons").

(b)

The business address for each of the Reporting Persons and the Related Persons is c/o Platinum Equity Advisors, LLC, 360 North Crescent Drive, South Building, Beverly Hills, CA 90210.

(c)

Mr. Gores is the Chairman and Chief Executive Officer of Platinum Equity Advisors, LLC. Each of the remaining Reporting Persons is principally engaged in the business of investments in securities. The principal occupation of each of the Related Persons is set forth in Exhibit 99.1 to this Schedule 13D.

(d)

During the last five years, none of the Reporting Persons or Related Persons have been convicted in any criminal proceeding (excluding traffic violations or similar misdemeanors).

(e)

During the last five years, none of the Reporting Persons or Related Persons were a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

(f)

Mr. Gores is a citizen of the United States. Each of Platinum Equity InvestCo, L.P. and Platinum Equity Partners International IV (Cayman), L.P. is organized under the laws of the Cayman Islands. Each of the remaining Reporting Persons is organized under the laws of the State of Delaware. The citizenship of each of the Related Persons is set forth in Exhibit 99.1 to this Schedule 13D.

Item 3.

Source and Amount of Funds or Other Consideration

Transaction Agreement On January 12, 2026 (the "Closing Date"), the Issuer consummated its acquisition (the "Husky Acquisition") of Husky Technologies Limited ("Husky") pursuant to the terms of a share purchase agreement, dated November 2, 2025 (the "Transaction Agreement"), by and among the Issuer, certain subsidiaries of the Issuer, Husky, Platinum Equity Advisors, LLC ("Platinum Advisors"), certain entities affiliated with Platinum Advisors, including PE Titan CS Holdings, L.P., and certain members of Husky management (together with Platinum Advisors and its affiliates, the "Platinum Parties"). Pursuant to the Transaction Agreement, at the closing of the Husky Acquisition, (i) the Issuer combined with Husky, with Husky becoming an indirect wholly owned subsidiary of the Issuer, and (ii) the Platinum Parties received aggregate consideration of approximately $680.69 million in cash and 54,978,334 shares (the "Stock Consideration") of the Issuer's Class A Common Stock, par value $0.0001 per share ("Class A Common Stock"), with PE Titan CS Holdings, L.P. receiving 52,829,757 shares of the Stock Consideration.

Item 4.

Purpose of Transaction

Transaction Agreement Item 3 above summarizes certain provisions of the Transaction Agreement and is incorporated herein by reference. Investor Rights Agreement On the Closing Date, the Issuer and PE Titan CS Holdings, L.P. entered into an investor rights agreement (the "Investor Rights Agreement"), pursuant to which, PE Titan CS Holdings, L.P. has the right to nominate (i) two members of the Issuer's board of directors (the "Board"), for so long as it, together with its affiliates, continue to hold at least 10% of the outstanding shares of Class A Common Stock, and (ii) one member of the Board so long as it, together with its affiliates, continue to hold less than 10% but more than 5% of the outstanding shares of Class A Common Stock. Pursuant to the terms of the Investor Rights Agreement, PE Titan CS Holdings, L.P. nominated Delara Zarrabi and Louis Samson to serve on the Board. In addition, pursuant to the Investor Rights Agreement, PE Titan CS Holdings, L.P. has agreed to be subject to a lock-up period of 90 days following the Closing Date, subject to early release by the Issuer. Registration Rights Agreement In addition, on the Closing Date, the Issuer and PE Titan CS Holdings, L.P. entered into a registration rights agreement (the "Registration Rights Agreement") which, among other things, provides for customary resale, demand and piggyback registration rights. The foregoing descriptions of the Transaction Agreement, the Investor Rights Agreement and the Registration Rights Agreement do not purport to be complete and are qualified in their entirety by the full text of such agreements, each of which is attached as an exhibit to this Schedule 13D and incorporated herein by reference. General The Reporting Persons acquired the securities described in this Schedule 13D in connection with the Husky Acquisition, and they intend to review their investments in the Issuer on a continuing basis. Any actions the Reporting Persons might undertake will be dependent upon the Reporting Persons' review of numerous factors, including, but not limited to: an ongoing evaluation of the Issuer's business, financial condition, operations and prospects; price levels of the Issuer's securities; general market, industry and economic conditions; the relative attractiveness of alternative business and investment opportunities; and other future developments. The Reporting Persons may acquire additional securities of the Issuer, or retain or sell all or a portion of the securities then held, in the open market or in privately negotiated transactions. In addition, the Reporting Persons, including its nominees to the Board, from time to time, in their positions as directors of the Issuer, may engage in discussions with management, the Board, and other securityholders of the Issuer and other relevant parties or encourage, cause or seek to cause the Issuer or such persons to consider or explore extraordinary corporate transactions, such as: a merger, reorganization or take-private transaction that could result in the de-listing or de-registration of the Class A Common Stock; security offerings and/or stock repurchases by the Issuer; sales or acquisitions of assets or businesses; changes to the capitalization or dividend policy of the Issuer; or other material changes to the Issuer's business or corporate structure, including changes in management or the composition of the Board. To facilitate their consideration of such matters, the Reporting Persons may retain consultants and advisors and may enter into discussions with potential sources of capital and other third parties. The Reporting Persons may exchange information with any such persons pursuant to appropriate confidentiality or similar agreements. The Reporting Persons will likely take some or all of the foregoing steps at preliminary stages in their consideration of various possible courses of action before forming any intention to pursue any particular plan or direction. Other than as described above, the Reporting Persons do not currently have any plans or proposals that relate to, or would result in, any of the matters listed in Items 4(a)-(j) of Schedule 13D, although the Reporting Persons may change their purpose or formulate different plans or proposals with respect thereto at any time.

Item 5.

Interest in Securities of the Issuer

(a)

The ownership information set forth herein represents beneficial ownership of Class A Common Stock as of the date hereof, based upon 289,415,409 shares of Class A Common Stock outstanding as of the Closing Date. PE Titan CS Holdings, L.P. is the record holder of 52,829,757 shares of Class A Common Stock, representing 18.3% of the outstanding shares. Tom Gores is the manager of Platinum Equity, LLC, which is the sole member of Platinum Equity Investment Holdings, LLC, which is the sole member of Platinum Equity Investment Holdings IC (Cayman), LLC, which is the general partner of Platinum Equity InvestCo, L.P., which is the sole member of Platinum Equity Investment Holdings IV, LLC, which is the sole member of Platinum Equity Investment Holdings IV (Cayman), LLC, which is the general partner of Platinum Equity Partners International IV (Cayman), L.P., which is the general partner of PE Titan CS Holdings, L.P. By virtue of these relationships, each of the foregoing entities and Mr. Gores may be deemed to share beneficial ownership of the securities held of record by PE Titan CS Holdings, L.P.

(b)

Sole power to vote or to direct the vote: 0 Shared power to vote or to direct the vote: 52,829,757 Sole power to dispose or to direct the disposition: 0 Shared power to dispose or to direct the disposition: 52,829,757

(c)

Except as otherwise disclosed in Item 3 and Item 4 herein, during the past 60 days, none of the Reporting Persons or the Related Persons have effected any transactions in the Class A Common Stock during the past 60 days.

(d)

None.

(e)

Not applicable.

Item 6.

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

Item 4 above summarizes certain provisions of the Transaction Agreement, the Investor Rights Agreement and the Registration Rights Agreement and is incorporated herein by reference. A copy of each agreement is attached as an exhibit hereto and incorporated herein by reference. Except as set forth herein, none of the Reporting Persons or Related Persons has any contracts, arrangements, understandings or relationships (legal or otherwise) with any person with respect to any securities of the Issuer, including, but not limited to, any contracts, arrangements, understandings or relationships concerning the transfer or voting of such securities, finder's fees, joint ventures, loan or option arrangements, puts or calls, guarantees of profits, division of profits or losses, or the giving or withholding of proxies.

Item 7.

Material to be Filed as Exhibits.

Exhibit 99.1: Executive Officers of Platinum Equity, LLC Exhibit 99.2: Joint Filing Agreement. Exhibit 99.3: Power of Attorney. Exhibit 99.4: Share Purchase Agreement, dated as of November 2, 2025, by and among CompoSecure, Inc., certain of its subsidiaries, Husky Technologies Limited, Platinum Equity, certain entities affiliated with Platinum Equity and management members of Husky (incorporated by reference to Exhibit 2.1 to the Current Report on Form 8-K filed by the Issuer on November 4, 2025). Exhibit 99.5: Investor Rights Agreement, dated as of January 12, 2026, by and between CompoSecure, Inc. and PE Titan CS Holdings L.P. (incorporated by reference to Exhibit 10.1 to the Current Report on Form 8-K filed by the Issuer on January 12, 2026). Exhibit 99.6: Registration Rights Agreement, dated as of January 12, 2026, by and between CompoSecure, Inc. and PE Titan CS Holdings L.P. (incorporated by reference to Exhibit 10.2 to the Current Report on Form 8-K filed by the Issuer on January 12, 2026).

SIGNATURE

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.

Platinum Equity, LLC

Signature:	/s/ Mary Ann Sigler
Name/Title:	Mary Ann Sigler, Executive Vice President, Chief Financial Officer and Treasurer
Date:	01/20/2026

Platinum Equity Investment Holdings, LLC

Signature:	/s/ Mary Ann Sigler
Name/Title:	Mary Ann Sigler, Vice President, Secretary and Treasurer
Date:	01/20/2026

Platinum Equity Investment Holdings IC (Cayman), LLC

Signature:	/s/ Mary Ann Sigler
Name/Title:	Mary Ann Sigler, President
Date:	01/20/2026

Platinum Equity InvestCo, L.P.

Signature:	By: Platinum Equity Investment Holdings IC (Cayman), LLC, its general partner, /s/ Mary Ann Sigler
Name/Title:	Mary Ann Sigler, President
Date:	01/20/2026

Platinum Equity Investment Holdings IV, LLC

Signature:	/s/ Ty Renbarger
Name/Title:	Ty Renbarger, Vice President
Date:	01/20/2026

Platinum Equity Investment Holdings IV (Cayman), LLC

Signature:	/s/ Ty Renbarger
Name/Title:	Ty Renbarger, Vice President
Date:	01/20/2026

Platinum Equity Partners International IV (Cayman), L.P.

Signature:	By: Platinum Equity Investment Holdings IV (Cayman), LLC, its general partner, /s/ Ty Renbarger
Name/Title:	Ty Renbarger, Vice President
Date:	01/20/2026

PE Titan CS Holdings, L.P.

Signature:	By: Platinum Equity Partners International IV (Cayman), L.P., its GP, Platinum Equity Investment Holdings IV (Cayman), LLC, its GP, /s/ Ty Renbarger
Name/Title:	Ty Renbarger, Vice President
Date:	01/20/2026

Tom Gores

Signature:	/s/ Mary Ann Sigler
Name/Title:	Mary Ann Sigler, Attorney-in-Fact
Date:	01/20/2026

SEC Form SCHEDULE 13D filed by CompoSecure Inc.