MACOM Technology Solutions Holdings, Inc.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the Securities

Exchange Act of 1934 (Amendment No. )

Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐

Check the appropriate box:

(Name of Registrant as Specified in its Charter)

(Name of Person(s) Filing Proxy Statement, if Other Than the Registrant)

Payment of Filing Fee (Check the appropriate box):

Lowell, Massachusetts

January 16, 2026

Dear Stockholders:

You are cordially invited to attend the MACOM Technology Solutions Holdings, Inc. 2026 Annual Meeting of Stockholders on Thursday, March 5, 2026 at 3:00 p.m. (Eastern Time). The meeting will be held at the Holiday Inn Express, 8 Independence Drive, Chelmsford, Massachusetts 01824. Our board of directors has fixed the close of business on January 12, 2026 as the record date for determining those stockholders entitled to notice of, and to vote at, the annual meeting of our stockholders and any adjournments thereof.

The Notice of Annual Meeting of Stockholders and Proxy Statement, both of which accompany this letter, provide details regarding the business to be conducted at the annual meeting, including proposals for the election of the eight directors named in the accompanying proxy materials (Proposal 1), for an advisory vote to approve our executive compensation (Proposal 2) and to ratify the appointment of Deloitte & Touche LLP as our independent registered public accounting firm for the fiscal year ending October 2, 2026 (Proposal 3).

Our board of directors recommends that you vote FOR the director nominees set forth in Proposal 1, and FOR Proposals 2 and 3. Each proposal is described in more detail in our Proxy Statement.

Your vote is very important. Please vote your shares promptly, whether or not you expect to attend the meeting in person. You may vote over the Internet, as well as by telephone, or, if you requested to receive printed proxy materials, by mailing a proxy or voting instruction card. If you attend the annual meeting, you may vote in person if you are eligible to do so, even if you have previously submitted your vote.

Sincerely,

Ambra R. Roth

Senior Vice President, General Counsel

and Secretary

100 Chelmsford Street

Lowell, MA 01851

NOTICE OF ANNUAL MEETING OF STOCKHOLDERS

TO BE HELD ON MARCH 5, 2026

The 2026 Annual Meeting of Stockholders of MACOM Technology Solutions Holdings, Inc. (the “Annual Meeting”) will be held at the Holiday Inn Express, 8 Independence Drive, Chelmsford, MA 01824, on Thursday, March 5, 2026 at 3:00 p.m. (Eastern Time). The purposes of the Annual Meeting are to:

Only holders of our common stock at the close of business on January 12, 2026 (the “Record Date”) will be entitled to notice of and to vote at the Annual Meeting and any adjournments thereof.

In accordance with Securities and Exchange Commission rules, on or about January 16, 2026, we sent a Notice of Internet Availability of Proxy Materials and provided access to our proxy materials over the Internet to the holders of record and beneficial owners of our common stock as of the close of business on the Record Date.

Our stockholders and persons holding proxies from stockholders may attend the Annual Meeting. If your shares are registered in your name, you must bring a form of identification to the Annual Meeting. If your shares are held in the name of a broker, trust, bank or other nominee, you must bring a proxy or letter from that broker, trust, bank or other nominee that confirms you are the beneficial owner of those shares.

By order of the board of directors,

Ambra R. Roth

Senior Vice President, General Counsel

and Secretary

Lowell, Massachusetts

January 16, 2026

Important Notice Regarding the Availability of Proxy Materials

For the Annual Meeting of Stockholders to be Held on March 5, 2026

This Proxy Statement and our Annual Report are available at: www.proxyvote.com

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