Director Geoffrey Ribar sells 1,623 MACOM (MTSI) shares at $361.84

Rhea-AI Filing Summary

MACOM Technology Solutions Holdings, Inc. director Geoffrey G. Ribar sold 1,623 shares of Common Stock in an open-market transaction on May 11, 2026 at an average price of $361.84 per share. Following this sale, he directly holds 12,563 MACOM common shares.

Insider Trade Summary

Net Seller: 1,623 shares ($587,266)

Net Sell 1 txn

Insider RIBAR GEOFFREY G

Role null

Sold 1,623 shs ($587K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,623	$361.84	$587K

Holdings After Transaction: Common Stock — 12,563 shares (Direct, null)

Footnotes (1)

Key Figures

Shares sold: 1,623 shares Sale price per share: $361.84 per share Shares held after transaction: 12,563 shares +1 more

4 metrics

Shares sold 1,623 shares Open-market sale of Common Stock on May 11, 2026

Sale price per share $361.84 per share Average price for the 1,623 shares sold

Shares held after transaction 12,563 shares Director’s direct holdings following the sale

Net shares sold 1,623 shares Net sell direction from transaction summary

Key Terms

Form 4, open-market sale, non-derivative, beneficially owned

4 terms

Form 4 regulatory

"reported in the Form 4 insider trading report filed with the SEC"

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.

open-market sale financial

"completed an open-market sale of 1,623 shares of Common Stock"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

non-derivative financial

"These shares were reported as a non-derivative open-market sale"

beneficially owned financial

"total shares beneficially owned following completion of the May 11, 2026 sale"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

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^*

RIBAR GEOFFREY G

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/11/2026

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	05/11/2026		S		1,623	D	$361.84	12,563	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	05/13/2026
	** 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 Technology Solutions (MTSI) report on this Form 4?

MACOM reported that director Geoffrey G. Ribar completed an open-market sale of 1,623 shares of Common Stock. The transaction took place on May 11, 2026 and is classified as a non-derivative sale in the company’s Form 4 insider filing.

At what price did Geoffrey G. Ribar sell MACOM (MTSI) shares?

Geoffrey G. Ribar sold his MACOM shares at an average price of $361.84 per share. This price reflects the weighted average for the 1,623 shares sold in the open-market transaction reported in the Form 4 filing.

How many MACOM (MTSI) shares did the director sell in this transaction?

The director sold 1,623 shares of MACOM common stock in this transaction. These shares were reported as a non-derivative open-market sale under transaction code “S” in the Form 4 insider trading report filed with the SEC.

How many MACOM (MTSI) shares does Geoffrey G. Ribar hold after the sale?

After the reported sale, Geoffrey G. Ribar directly holds 12,563 shares of MACOM common stock. This post-transaction holding amount is disclosed in the Form 4 as the total shares beneficially owned following completion of the May 11, 2026 sale.

Was the MACOM (MTSI) insider transaction a purchase or a sale?

The transaction was a sale of MACOM common stock by director Geoffrey G. Ribar. It is coded as “S” for sale and described as an open-market or private sale of 1,623 non-derivative shares at an average price of $361.84 per share.