MACOM COO sells 18,398 shares under 10b5‑1 plan

MACOM Technology Solutions Holdings, Inc. Senior VP and COO Robert Dennehy reported selling common stock in a series of open‑market transactions.

Rhea-AI Filing Summary

MACOM Technology Solutions Holdings, Inc. Senior VP and COO Robert Dennehy reported selling common stock in a series of open‑market transactions. On February 26, 2026, he sold a total of 18,398 shares of common stock under a pre‑arranged sales plan adopted on November 27, 2025 and intended to comply with Rule 10b5‑1 under the Securities Exchange Act of 1934.

The reported weighted average sale prices for these trades ranged from $240.20 to $254.05 per share across multiple transaction groups. Following these sales, Dennehy directly owned 12,864 shares of MACOM Technology Solutions common stock.

Insider Trade Summary

Net Seller: 18,398 shares

Net Sell 9 txns

Insider Dennehy Robert

Role Senior VP and COO

Sold 18,398 shs ($4.51M)

Type	Security	Shares	Price	Value
Sale	Common Stock	971	$240.40	$233K
Sale	Common Stock	300	$241.70	$73K
Sale	Common Stock	3,200	$242.96	$777K
Sale	Common Stock	4,780	$243.95	$1.17M
Sale	Common Stock	4,100	$244.85	$1.00M
Sale	Common Stock	2,576	$246.70	$635K
Sale	Common Stock	400	$248.97	$100K
Sale	Common Stock	500	$250.52	$125K
Sale	Common Stock	1,571	$253.58	$398K

Holdings After Transaction: Common Stock — 12,864 shares (Direct)

Footnotes (10)

1. F1. The shares were sold pursuant to a sales plan adopted by the Reporting Person on November 27, 2025 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.
2. F2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $240.20 to $240.73. 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.
3. F3. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $241.38 to $242.37. 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.
4. F4. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $242.44 to $243.42. 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. F5. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $243.45 to $244.41. 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.
6. F6. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $244.46 to $245.40. 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. F7. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $246.15 to $247.09. 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.
8. F8. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $248.61 to $249.11. 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.
9. F9. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $250.51 to $250.54. 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.
10. F10. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $253.30 to $254.05. 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.

FAQ

What insider transaction did MACOM Technology Solutions (MTSI) report for Robert Dennehy?

MACOM Technology Solutions reported that Senior VP and COO Robert Dennehy sold common stock in multiple open‑market transactions on February 26, 2026. The Form 4 shows these were routine stock sales executed under a pre‑arranged Rule 10b5‑1 trading plan.

How many MACOM Technology Solutions (MTSI) shares did Robert Dennehy sell?

Robert Dennehy sold a total of 18,398 shares of MACOM Technology Solutions common stock. These shares were divided into several open‑market sale transactions, all dated February 26, 2026, as detailed in the Form 4 insider trading report.

At what prices were Robert Dennehy’s MTSI shares sold on February 26, 2026?

The reported weighted average prices for Robert Dennehy’s MACOM Technology Solutions share sales ranged from $240.20 to $254.05 per share. Each line in the filing reflects a weighted average, with underlying trades executed within the specific price ranges described in the footnotes.

How many MACOM Technology Solutions (MTSI) shares does Robert Dennehy own after these sales?

After completing the reported transactions, Robert Dennehy directly owned 12,864 shares of MACOM Technology Solutions common stock. This post‑transaction holding amount is listed in the Form 4 as the total number of shares beneficially owned following the final sale.

What is the Rule 10b5‑1 trading plan mentioned in Robert Dennehy’s MTSI Form 4?

The filing states that the shares were sold under a sales plan adopted on November 27, 2025, intended to comply with Rule 10b5‑1. This indicates the trades followed a pre‑established schedule rather than being decided at the time of each sale.

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Accepted by SEC EDGAR 03/02/2026 - 04:42 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 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		10% Owner
X	Officer (give title below)		Other (specify below)
	Senior VP and COO

3. Date of Earliest Transaction (Month/Day/Year)
02/26/2026

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	02/26/2026		S(1)		971	D	$240.4(2)	30,291	D
Common Stock	02/26/2026		S(1)		300	D	$241.7(3)	29,991	D
Common Stock	02/26/2026		S(1)		3,200	D	$242.96(4)	26,791	D
Common Stock	02/26/2026		S(1)		4,780	D	$243.95(5)	22,011	D
Common Stock	02/26/2026		S(1)		4,100	D	$244.85(6)	17,911	D
Common Stock	02/26/2026		S(1)		2,576	D	$246.7(7)	15,335	D
Common Stock	02/26/2026		S(1)		400	D	$248.97(8)	14,935	D
Common Stock	02/26/2026		S(1)		500	D	$250.52(9)	14,435	D
Common Stock	02/26/2026		S(1)		1,571	D	$253.58(10)	12,864	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 November 27, 2025 and intended to comply with Rule 10b5-1 under the Securities Exchange Act of 1934.

2. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $240.20 to $240.73. 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.

3. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $241.38 to $242.37. 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.

4. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $242.44 to $243.42. 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. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $243.45 to $244.41. 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.

6. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $244.46 to $245.40. 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. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $246.15 to $247.09. 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.

8. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $248.61 to $249.11. 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.

9. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $250.51 to $250.54. 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.

10. The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $253.30 to $254.05. 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.

	/s/ Ambra R. Roth, Attorney-in-Fact	03/02/2026
	** 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.