MACOM (MTSI) COO adds 146 shares through stock purchase plan

Rhea-AI Filing Summary

MACOM Technology Solutions Holdings, Inc. Senior VP and COO Robert Dennehy acquired 146 shares of Common Stock on May 15, 2026 at $138.13 per share. The shares were purchased under the company’s Employee Stock Purchase Plan, a routine compensation-related program.

Following this acquisition, Dennehy directly holds 13,010 MACOM common shares. The filing reflects a small, plan-based increase in his equity stake rather than an open-market trade.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Dennehy Robert

Role Senior VP and COO

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	146	$138.13	$20K

Holdings After Transaction: Common Stock — 13,010 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares acquired: 146 shares Purchase price: $138.13 per share Holdings after transaction: 13,010 shares +1 more

4 metrics

Shares acquired 146 shares Common Stock acquired on May 15, 2026

Purchase price $138.13 per share Price for ESPP acquisition on May 15, 2026

Holdings after transaction 13,010 shares Direct MACOM common stock held by Dennehy after acquisition

Transaction date May 15, 2026 Date of ESPP share acquisition reported on Form 4

Key Terms

Employee Stock Purchase Plan, Common Stock, Form 4, Senior VP and COO

4 terms

Employee Stock Purchase Plan financial

"The shares were purchased under the Issuer's Employee Stock Purchase Plan."

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

Common Stock financial

"security_title: Common Stock"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

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.

Senior VP and COO financial

"officer_title: Senior VP and COO"

Form 4 Insider Transactions: What Each Field Means →

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^*

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)
05/15/2026

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	05/15/2026		A(1)	V	146	A	$138.13	13,010	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 purchased under the Issuer's Employee Stock Purchase Plan.

	/s/ Ambra R. Roth, Attorney-in-Fact	05/20/2026
	** 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)

FAQ

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

MACOM reported that Senior VP and COO Robert Dennehy acquired 146 shares of Common Stock. The shares were obtained on May 15, 2026 at $138.13 per share under the company’s Employee Stock Purchase Plan, indicating a routine, compensation-related purchase.

How many MACOM (MTSI) shares did Robert Dennehy acquire and at what price?

Robert Dennehy acquired 146 MACOM common shares at $138.13 per share. The transaction occurred on May 15, 2026 and was executed through the company’s Employee Stock Purchase Plan, which allows employees to purchase stock on structured terms.

What are Robert Dennehy’s MACOM (MTSI) holdings after this Form 4 transaction?

After this transaction, Robert Dennehy directly holds 13,010 shares of MACOM common stock. The 146 shares acquired under the Employee Stock Purchase Plan modestly increase his existing equity position as reported in this Form 4 filing with the SEC.

Was the MACOM (MTSI) insider transaction an open-market buy or plan purchase?

The transaction was a plan-based purchase, not an open-market trade. The Form 4 footnote states the 146 shares were purchased under MACOM’s Employee Stock Purchase Plan, reflecting a routine, structured acquisition rather than a discretionary market buy.

What role does Robert Dennehy hold at MACOM (MTSI) in this Form 4 filing?

In this Form 4, Robert Dennehy is identified as MACOM’s Senior Vice President and Chief Operating Officer. His acquisition of 146 shares under the Employee Stock Purchase Plan increases his direct ownership to 13,010 common shares in the company.