MACOM SVP reports PRSU vesting; 53,456 shares held post-settlement

Rhea-AI Filing Summary

MACOM Technology Solutions Holdings (MTSI) reported insider equity activity by its SVP, Global Sales. On 11/06/2025, 38,591 performance-based restricted stock units vested and settled into common stock at $0. To cover taxes related to this vesting, the issuer withheld 17,117 shares at $166.92 on the same date.

On 11/08/2025, the issuer also withheld 471 shares at $170.03 for tax withholding tied to restricted stock unit vesting. After the reported transactions, the officer directly owned 53,456 shares.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Hwang Donghyun Thomas

Role SVP, Global Sales

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	471	$170.03	$80K
Grant/Award	Common Stock	38,591	$0.00	--
Tax Withholding	Common Stock	17,117	$166.92	$2.86M

Holdings After Transaction: Common Stock — 53,456 shares (Direct)

Footnotes (1)

1. Represents performance-based restricted stock units ("PRSUs") previously granted to the Reporting Person under an equity compensation plan maintained by the Issuer, which vested and settled in shares of Common Stock on November 6, 2025. Shares withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the vesting and settling of PRSUs on November 6, 2025. Shares withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units on November 8, 2025.

Form 4 Insider Transactions: What Each Field Means →

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^*

Hwang Donghyun Thomas

(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, Global Sales

3. Date of Earliest Transaction (Month/Day/Year)
11/06/2025

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	11/06/2025		A		38,591(1)	A	$0	71,044	D
Common Stock	11/06/2025		F		17,117(2)	D	$166.92	53,927	D
Common Stock	11/08/2025		F		471(3)	D	$170.03	53,456	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. Represents performance-based restricted stock units ("PRSUs") previously granted to the Reporting Person under an equity compensation plan maintained by the Issuer, which vested and settled in shares of Common Stock on November 6, 2025.

2. Shares withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the vesting and settling of PRSUs on November 6, 2025.

3. Shares withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units on November 8, 2025.

	/s/ Ambra R. Roth, Attorney-in-Fact	11/10/2025
	** 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.

FAQ

What insider activity did MTSI report on Form 4?

The SVP, Global Sales reported PRSU vesting of 38,591 shares on 11/06/2025, plus share withholdings for taxes on 11/06/2025 and 11/08/2025.

How many PRSUs vested for MTSI’s SVP?

38,591 PRSUs vested and settled into common stock at $0 on 11/06/2025.

What shares were withheld for taxes in the MTSI filing?

The issuer withheld 17,117 shares at $166.92 on 11/06/2025 and 471 shares at $170.03 on 11/08/2025.

What is the officer’s share ownership after the transactions?

Following the transactions, the officer directly owned 53,456 shares.

What is the officer’s role at MTSI?

The reporting person is MTSI’s SVP, Global Sales.

Were these transactions sales on the open market?

No; the filing shows PRSU vesting and share withholdings for taxes, not open-market sales.