[Form 4] MACOM Technology Solutions Holdings, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Susan Ocampo, a director of MACOM Technology Solutions Holdings (MTSI), reported multiple open-market sales of common stock on September 15 and September 17, 2025. She sold a total of 212,859 shares in three transactions at weighted-average prices in ranges near $132.00–$133.63 per share. After those disposals, the filing shows she retains indirect beneficial ownership of common stock through family trusts and a GRAT totaling 4,415,331 shares held by Ocampo Family Trusts plus 1,500,000 shares held by a GRAT and smaller trust holdings, with specific trust allocations detailed in the filing. The report was signed by an attorney-in-fact on behalf of the reporting person.

Positive

• Timely compliance with Section 16 reporting by disclosing all transactions on Form 4
• Transparent price disclosure including weighted-average price ranges and offers to provide per-trade details on request
• Detailed trust breakdown clarifying indirect ownership across multiple family trusts and a GRAT

Negative

• Insider sales of 212,859 shares executed on 09/15/2025 and 09/17/2025, which represent a measurable disposition from the reporting person
• Concentrated family ownership remains (multi-million share holdings), which can limit outside shareholder influence

Insights

Corporate Governance Expert

TL;DR: Routine insider disposition disclosed with clear trust ownership; not unusual but notable for scale relative to trust holdings.

The Form 4 documents open-market sales by a director executed over two days with weighted-average prices disclosed and granular breakdowns of beneficial ownership across multiple trusts and a grantor retained annuity trust. The filing adheres to Section 16 reporting requirements and provides transparency about indirect ownership via trusts for beneficiaries. For governance, the key item is the combination of active sales and the retention of substantial indirect positions, which keeps voting and economic exposure within family-controlled structures.

Securities Analyst

TL;DR: Insider sold 212,859 shares across three transactions at about $132–$133.6, leaving multi-million share indirect holdings.

From an investor perspective, the transactions are clearly disclosed with weighted-average prices and trust allocations. The sales total 212,859 shares executed on 09/15/2025 and 09/17/2025. Following the sales, the filing reports multi-million share indirect holdings via family trusts and a GRAT, indicating continued concentrated exposure. The transactions are material in absolute share count but the filing shows continued significant ownership, which may limit governance impact.

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).

1. Name and Address of Reporting Person^*

OCAMPO SUSAN

(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	X	10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
09/15/2025

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	09/15/2025		S		107,361	D	$132.16(1)	3,627,684(2)	I	By trusts for children(3)
Common Stock	09/15/2025		S		43,063	D	$133.11(4)	3,584,621(5)	I	By trusts for children(3)
Common Stock	09/17/2025		S		62,435	D	$133.02(6)	3,522,186(7)	I	By trusts for children(3)
Common Stock								4,415,331	I	By Ocampo Family Trusts(3)
Common Stock								1,500,000	I	By GRAT(3)
Common Stock								1,623	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. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $132.00 to $132.98. The Reporting Person undertakes to provide to the Issuer, any shareholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

2. 960,898 of such shares are held by two trusts for the Reporting Person's son; 1,333,393 of such shares are held by two trusts for the Reporting Person's daughter; and 1,333,393 of such shares are held by two trusts for the Reporting Person's son.

3. The Reporting Person is a trustee of two Ocampo Family Trusts, the GRAT and each of the following six trusts for the benefit of her children: (i) two trusts for her son; (ii) two trusts for her daughter; and (iii) two trusts for her son.

4. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $133.00 to $133.63. The Reporting Person undertakes to provide to the Issuer, any shareholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

5. 946,544 of such shares are held by two trusts for the Reporting Person's son; 1,319,038 of such shares are held by two trusts for the Reporting Person's daughter; and 1,319,039 of such shares are held by two trusts for the Reporting Person's son.

6. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $133.00 to $133.32. The Reporting Person undertakes to provide to the Issuer, any shareholder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

7. 925,732 of such shares are held by two trusts for the Reporting Person's son; 1,298,227 of such shares are held by two trusts for the Reporting Person's daughter; and 1,298,227 of such shares are held by two trusts for the Reporting Person's son.

	/s/ Ambra R. Roth, Attorney-in-Fact	09/17/2025
	** 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 transactions did Susan Ocampo report for MTSI?

The Form 4 reports open-market sales of a total of 212,859 shares executed on 09/15/2025 and 09/17/2025 across three transactions.

At what prices were the MTSI shares sold by the reporting person?

Reported weighted-average prices ranged from approximately $132.00 to $133.63 per share, with per-transaction weighted averages disclosed and price ranges provided in footnotes.

How many MTSI shares does the reporting person beneficially own after the transactions?

The filing shows substantial indirect beneficial ownership including 4,415,331 shares held by Ocampo Family Trusts and 1,500,000 shares held by a GRAT, plus additional trust-level holdings detailed in the filing.

Were the shares held directly or indirectly after the reported sales?

The shares are reported as indirect beneficial ownership held through various family trusts and a GRAT, with the reporting person acting as trustee for several trusts.

Who signed the Form 4 filing for the reporting person?

The Form 4 was signed by Ambra R. Roth, Attorney-in-Fact on behalf of the reporting person on 09/17/2025.