MTSI Form 4: Officer withheld 260 shares at $139.31 for taxes

MACOM Technology Solutions Holdings (MTSI) — Form 4: The company’s SVP, Operations reported a tax-related share withholding tied to restricted stock unit vesting.

Rhea-AI Filing Summary

MACOM Technology Solutions Holdings (MTSI) — Form 4: The company’s SVP, Operations reported a tax-related share withholding tied to restricted stock unit vesting. On 10/23/2025 (transaction code F), 260 shares of common stock were withheld at $139.31 per share to satisfy tax obligations.

After the transaction, the reporting person beneficially owns 6,292 shares, held directly. This filing reflects an administrative, non-open-market event associated with equity compensation vesting.

Insider Trade Summary

Exercise Price or Tax Liability: 260 shares

Exercise Price or Tax Liability 1 txn

Insider Dennehy Robert

Role SVP, Operations

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	260	$139.31	$36K

Holdings After Transaction: Common Stock — 6,292 shares (Direct)

Footnotes (1)

1. F1. Shares withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units on October 23, 2025.

FAQ

What did MTSI disclose in this Form 4?

An officer had 260 shares withheld on 10/23/2025 to cover taxes from RSU vesting (code F), at $139.31 per share.

How many MTSI shares does the reporting person own after the transaction?

The reporting person beneficially owns 6,292 shares directly after the reported transaction.

What was the purpose of the MTSI share withholding?

Per the explanation, shares were withheld to satisfy tax withholding obligations upon RSU vesting on October 23, 2025.

What transaction code appears in the MTSI Form 4?

The filing lists transaction code F, indicating tax withholding related to equity award vesting.

What price was reported for the withheld MTSI shares?

The reported price for the 260 withheld shares was $139.31 per share.

What is the reporting person’s role at MTSI?

The individual is an Officer, serving as SVP, Operations.

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Accepted by SEC EDGAR 10/27/2025 - 08:08 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Dennehy Robert

(Last) (First) (Middle)

C/O MACOM TECHNOLOGY SOLUTIONS HOLDINGS

100 CHELMSFORD STREET

(Street)

LOWELL MA 01851

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
MACOM Technology Solutions Holdings, Inc. [ MTSI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Operations

3. Date of Earliest Transaction (Month/Day/Year)
10/23/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/23/2025		F		260(1)	D	$139.31	6,292	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Shares withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units on October 23, 2025.

	/s/ Ambra R. Roth, Attorney-in-Fact	10/27/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.