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

Rhea-AI Filing Summary

MACOM Technology Solutions Holdings (MTSI) reported insider transactions involving indirect holdings in family trusts. On 10/23/2025, trusts for the reporting person’s children sold 1,862 shares at a weighted average $141.00. On 10/24/2025, trusts sold 44,809 shares at a weighted average $142.10. On 10/27/2025, trusts sold 60,705 shares at a weighted average $147.02.

After these transactions, the filing lists 2,815,721 shares indirectly held by trusts for children (post-10/23), then 2,770,912 shares (post-10/24), and 2,710,207 shares (post-10/27). Additional indirect holdings are disclosed as 4,416,954 shares by Ocampo Family Trusts and 1,500,000 shares by a GRAT. Prices reflect weighted averages with detailed ranges noted for each trade.

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

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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^*

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)
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		S		1,862	D	$141(1)	2,815,721(2)	I	By trusts for children(3)
Common Stock	10/24/2025		S		44,809	D	$142.1(4)	2,770,912(5)	I	By trusts for children(3)
Common Stock	10/27/2025		S		60,705	D	$147.02(6)	2,710,207(7)	I	By trusts for children(3)
Common Stock								4,416,954	I	By Ocampo Family Trusts(3)
Common Stock								1,500,000	I	By GRAT(3)

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 $141.00 to $141.01. 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. 734,944 of such shares are held by two trusts for the Reporting Person's son; 1,040,388 of such shares are held by two trusts for the Reporting Person's daughter; and 1,040,389 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 $142.00 to $142.60. 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. 734,944 of such shares are held by two trusts for the Reporting Person's son; 1,017,984 of such shares are held by two trusts for the Reporting Person's daughter; and 1,017,984 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 $147.00 to $147.29. 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. 734,944 of such shares are held by two trusts for the Reporting Person's son; 987,631 of such shares are held by two trusts for the Reporting Person's daughter; and 987,632 of such shares are held by two trusts for the Reporting Person's son.

	/s/ Ambra R. Roth, Attorney-in-Fact	10/27/2025
	** Signature of Reporting Person	Date
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