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

Rhea-AI Filing Summary

Insider sales by MACOM director Jihye Whang Rosenband. The filing shows two open-market dispositions: 800 shares sold on 08/21/2025 at $123.81 and 800 shares sold on 08/22/2025 at $125.00. Beneficial ownership declined from 7,189 shares after the first sale to 6,389 shares after the second sale. The Form 4 was signed by an attorney-in-fact on 08/25/2025.

Positive

• Transparent disclosure of transaction dates, prices, and resulting beneficial ownership as required on Form 4
• Timely signature present (attorney-in-fact signed on 08/25/2025) documenting the filing

Negative

• None.

Insights

Financial Analyst

TL;DR: Director executed two market sales totaling 1,600 shares for proceeds near $200k.

The transactions are routine open-market dispositions totaling 1,600 shares sold across two days at prices of $123.81 and $125.00. The filing documents the change in beneficial ownership from 7,189 to 6,389 shares. This Form 4 provides clear transaction dates, prices, and post-sale holdings but includes no explanation for the sales or broader context about total holdings or percent ownership.

Corporate Governance Expert

TL;DR: Insider sale disclosed properly; no governance red flags within this filing.

The report identifies the reporting person as a director and records two disclosed sales under Section 16. The Form 4 is signed by an attorney-in-fact and contains required transaction detail. The filing does not indicate any planned trading arrangement or change in role, and it does not present additional governance issues beyond the disclosed sales.

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^*

Rosenband Jihye Whang

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
08/21/2025

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	08/21/2025		S		800	D	$123.81	7,189	D
Common Stock	08/22/2025		S		800	D	$125	6,389	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:

	/s/ Ambra R. Roth, Attorney-in-Fact	08/25/2025
	** 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 MTSI director Jihye Whang Rosenband report?

She reported two open-market sales: 800 shares on 08/21/2025 at $123.81 and 800 shares on 08/22/2025 at $125.00.

How many shares did the reporting person own after these transactions?

Beneficial ownership is reported as 7,189 shares after the first sale and 6,389 shares after the second sale.

Was the Form 4 properly signed and when?

Yes. The Form 4 contains a signature by an attorney-in-fact, /s/ Ambra R. Roth, dated 08/25/2025.

Does the filing state the reason for the sales or a 10b5-1 plan?

No. The filing does not state a reason for the sales and does not indicate a 10b5-1 trading plan.

Are these transactions derivative or non-derivative?

They are reported as non-derivative securities (common stock) sales.