MACOM COO sells 252 shares at $275.20 each

MACOM Technology Solutions Holdings, Inc. (MTSI) reported that Senior VP and COO Robert Dennehy sold 252 shares of common stock on 2026-08-28 at an average price of $275.20 per share in an open-market or private transaction.

Rhea-AI Filing Summary

MACOM Technology Solutions Holdings, Inc. (MTSI) reported that Senior VP and COO Robert Dennehy sold 252 shares of common stock on 2026-08-28 at an average price of $275.20 per share in an open-market or private transaction. Following this sale, he directly holds 12,758 shares. The transaction was executed under a Rule 10b5-1 trading plan adopted on May 29, 2026.

Insider Trade Summary 10b5-1

Net Seller: 252 shares

Net Sell 1 txn

Insider Dennehy Robert

Role Senior VP and COO

Sold 252 shs ($69K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	252	$275.20	$69K

Holdings After Transaction: Common Stock — 12,758 shares (Direct)

Footnotes (1)

1. F1. The shares were sold pursuant to a sales plan adopted by the Reporting Person on May 29, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

Key Figures

Shares sold: 252 shares Sale price per share: $275.20 Shares owned after transaction: 12,758 shares +1 more

4 metrics

Shares sold 252 shares Common stock sold by Robert Dennehy on 2026-08-28

Sale price per share $275.20 Average price for the 252 MTSI shares sold

Shares owned after transaction 12,758 shares Direct holdings of Robert Dennehy following the sale

Net shares sold 252 shares Net sell activity in the Form 4 transaction summary

Key Terms

Rule 10b5-1, open market or private transaction, Form 4, Reporting Person

4 terms

Rule 10b5-1 regulatory

"intended to comply with Rule 10b5-1 under the Securities Exchange Act"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

open market or private transaction financial

"Sale in open market or private transaction"

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Reporting Person regulatory

"sales plan adopted by the Reporting Person on May 29, 2026"

FAQ

What insider transaction did MTSI disclose for Robert Dennehy?

MTSI disclosed that Senior VP and COO Robert Dennehy sold 252 shares of common stock on 2026-08-28 at an average price of $275.20 per share in an open-market or private transaction, as reported on Form 4.

How many MTSI shares did Robert Dennehy retain after the reported sale?

After the reported transaction, Robert Dennehy directly holds 12,758 shares of MACOM Technology Solutions Holdings, Inc. common stock, according to the Form 4 disclosure.

Was the MTSI insider sale by Robert Dennehy under a Rule 10b5-1 plan?

Yes. The Form 4 states that the 252-share sale by Robert Dennehy was made pursuant to a sales plan adopted on May 29, 2026, intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

What price did Robert Dennehy receive for the MTSI shares sold?

The Form 4 reports that Robert Dennehy sold 252 shares of MTSI common stock at an average price of $275.20 per share in an open-market or private transaction on 2026-08-28.

Does the Form 4 for MTSI report any option exercises or derivative transactions?

No. The Form 4 for MTSI reports only a single sale of 252 shares of common stock and indicates no derivative transactions or option exercises in the transaction summary.

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Available on EDGAR 09/01/2026 - 04:37 PM Accepted by SEC EDGAR 09/01/2026 - 04:36 PM Learn about SEC filing dates

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).

X

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^*

Dennehy Robert

(Last) (First) (Middle)

C/O MACOM TECHNOLOGY SOLUTIONS HOLDINGS

100 CHELMSFORD STREET

(Street)

LOWELL MASSACHUSETTS 01851

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	Senior VP and COO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/28/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	08/28/2026		S(1)		252	D	$275.2	12,758	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 shares were sold pursuant to a sales plan adopted by the Reporting Person on May 29, 2026 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

	/s/ Ambra R. Roth, Attorney-in-Fact	09/01/2026
	** 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.
* Form 4: SEC 1474 (03-26)