MACOM grants Donghyun Thomas Hwang 1,439 stock units

Each RSU is a contingent right to one common share, with vesting conditional on continuous service through each scheduled date.

Rhea-AI Filing Summary

MACOM Technology Solutions Holdings, Inc. (MTSI) reported that SVP, Global Sales, Donghyun Thomas Hwang, was granted 1,439 restricted stock units (RSUs). Each RSU represents a contingent right to one common share. The RSUs vest in installments of 479 shares on October 21, 2027, 479 shares on October 21, 2028, and 481 shares on October 21, 2029, provided the reporting person remains in continuous service through each date. The reported total following the award was 31,195 shares.

Insider Trade Summary

Grant/Award: 1,439 shares

Grant/Award 1 txn

Insider Hwang Donghyun Thomas

Role SVP, Global Sales

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1	1,439	$0.00	$0.00

Holdings After Transaction: Common Stock — 31,195 shares (Direct)

Footnotes (1)

1. F1. Represents restricted stock units ("RSUs") granted to the Reporting Person under the Issuer's 2021 Omnibus Incentive Plan. Each RSU represents the contingent right to receive one share of Common Stock. The RSUs vest as to 479 shares on 10/21/2027, 479 shares on 10/21/2028 and 481 shares on 10/21/2029, provided that the Reporting Person remains in continuous service with the Issuer through each such vesting date.

Key Figures

Restricted stock units granted: 1,439 RSUs Reported total following award: 31,195 shares RSUs vesting: 479 shares +2 more

5 metrics

Restricted stock units granted 1,439 RSUs Granted to Donghyun Thomas Hwang

Reported total following award 31,195 shares Following the October 21, 2026 award

RSUs vesting 479 shares October 21, 2027

RSUs vesting 479 shares October 21, 2028

RSUs vesting 481 shares October 21, 2029

Key Terms

restricted stock units, contingent right, continuous service

3 terms

restricted stock units financial

"Represents restricted stock units ("RSUs") granted"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

contingent right financial

"Each RSU represents the contingent right to receive one share"

continuous service financial

"remains in continuous service with the Issuer"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How do Donghyun Thomas Hwang's MTSI RSUs vest?

The 1,439 RSUs vest as to 479 shares on October 21, 2027, 479 shares on October 21, 2028, and 481 shares on October 21, 2029. The reporting person must remain in continuous service through each applicable vesting date; each RSU represents the contingent right to one common share.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 10/23/2026 - 06:09 PM EDT Accepted by SEC EDGAR 10/23/2026 - 06:08 PM EDT 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).

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^*

Hwang Donghyun Thomas

(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)
	SVP, Global Sales

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/21/2026

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	10/21/2026		A		1,439(1)	A	$0	31,195	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. Represents restricted stock units ("RSUs") granted to the Reporting Person under the Issuer's 2021 Omnibus Incentive Plan. Each RSU represents the contingent right to receive one share of Common Stock. The RSUs vest as to 479 shares on 10/21/2027, 479 shares on 10/21/2028 and 481 shares on 10/21/2029, provided that the Reporting Person remains in continuous service with the Issuer through each such vesting date.

	/s/ Ambra R. Roth, Attorney-in-Fact	10/23/2026
	** 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)