MACOM (MTSI) insider reports PRSU vesting and tax withholdings

Q: What did MTSI’s insider acquire on the Form 4?

On November 6, 2025 , the officer acquired 38,591 shares at $0 upon vesting and settlement of PRSUs.

Q: How many MTSI shares were withheld for taxes and at what prices?

The issuer withheld 19,086 shares at $166.92 on Nov 6, 2025 and 540 shares at $170.03 on Nov 8, 2025 .

Q: How many MTSI shares does the officer own after the reported transactions?

Direct beneficial ownership was 27,105 shares following the reported transactions.

Q: What is the officer’s role at MTSI noted in the filing?

The reporting person is SVP, General Counsel and Secretary .

Filing Impact

(Very High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

MACOM Technology Solutions Holdings (MTSI) reported insider equity activity by its SVP, General Counsel and Secretary. On November 6, 2025, the officer acquired 38,591 shares of Common Stock at $0 upon vesting and settlement of performance-based RSUs. To cover taxes, the issuer withheld 19,086 shares at $166.92 on November 6 and 540 shares at $170.03 on November 8, 2025.

Following these transactions, the officer directly beneficially owned 27,105 shares. These entries reflect equity award vesting and share withholding for tax obligations.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Roth Ambra R.

Role SVP, GC and Secretary

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	540	$170.03	$92K
Grant/Award	Common Stock	38,591	$0.00	--
Tax Withholding	Common Stock	19,086	$166.92	$3.19M

Holdings After Transaction: Common Stock — 27,105 shares (Direct)

Footnotes (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 →

11/10/2025 - 05:12 PM

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
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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^*

Roth Ambra R.

(Last)

(First)

(Middle)

C/O MACOM TECHNOLOGY SOLUTIONS HOLDINGS

100 CHELMSFORD STREET

(Street)

LOWELL

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, GC and Secretary

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	11/06/2025		A		38,591⁽¹⁾	A	$0	46,731	D
Common Stock	11/06/2025		F		19,086⁽²⁾	D	$166.92	27,645	D
Common Stock	11/08/2025		F		540⁽³⁾	D	$170.03	27,105	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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	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.

Source: View Original Filing on SEC EDGAR

FAQ

What did MTSI’s insider acquire on the Form 4?

On November 6, 2025, the officer acquired 38,591 shares at $0 upon vesting and settlement of PRSUs.

How many MTSI shares were withheld for taxes and at what prices?

The issuer withheld 19,086 shares at $166.92 on Nov 6, 2025 and 540 shares at $170.03 on Nov 8, 2025.

How many MTSI shares does the officer own after the reported transactions?

Direct beneficial ownership was 27,105 shares following the reported transactions.

What is the officer’s role at MTSI noted in the filing?

The reporting person is SVP, General Counsel and Secretary.

What do transaction codes A and F indicate on the Form 4 for MTSI?

A reflects shares acquired from equity award vesting; F reflects shares withheld by the issuer to satisfy tax obligations.