MACOM director awarded 776 RSUs in equity grant

Rosenband Jihye Whang reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Rosenband Jihye Whang reported acquisition or exercise transactions in this Form 4 filing.

MACOM Technology Solutions Holdings, Inc. director Jihye Whang Rosenband received an equity award of 776 shares of Common Stock in the form of restricted stock units. After this grant, she holds 7,165 shares directly. The RSUs vest in full on March 6, 2027, if she remains in continuous service with the company through that date.

Insider Trade Summary

Grant/Award: 776 shares

Grant/Award 1 txn

Insider Rosenband Jihye Whang

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	776	$0.00	$0.00

Holdings After Transaction: Common Stock — 7,165 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 in full on March 6, 2027, provided that the Reporting Person remains in continuous service with the Issuer through the vesting date.

FAQ

What insider transaction did MACOM (MTSI) director Jihye Whang Rosenband report?

Director Jihye Whang Rosenband reported receiving an award of 776 restricted stock units of MACOM common stock. This is a compensation-related equity grant rather than an open‑market purchase or sale, and it increases her direct equity stake in the company.

How many MACOM (MTSI) shares does Jihye Whang Rosenband hold after this Form 4?

Following the reported award, Jihye Whang Rosenband directly holds 7,165 shares of MACOM common stock. This total includes the newly granted 776 restricted stock units, which represent the right to receive the same number of common shares at vesting.

What are the key terms of the 776 RSUs granted to MACOM (MTSI) director Rosenband?

The 776 restricted stock units each represent the contingent right to receive one share of MACOM common stock. They vest in full on March 6, 2027, provided Rosenband remains in continuous service with the company through that vesting date as disclosed.

Is the MACOM (MTSI) Form 4 transaction a market purchase or sale of shares?

The Form 4 shows a grant coded as an acquisition (A), not a market trade. Rosenband received 776 restricted stock units at no cash price as part of equity compensation, rather than buying or selling shares on the open market.

What does the vesting condition on MACOM (MTSI) director Rosenband’s RSUs mean for investors?

The RSUs vest only if Rosenband remains in continuous service with MACOM through March 6, 2027. This structure ties part of her compensation to ongoing board service and long‑term alignment with shareholder interests via future delivery of common stock.

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Accepted by SEC EDGAR 03/10/2026 - 05:01 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).

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^*

Rosenband Jihye Whang

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
03/06/2026

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	03/06/2026		A		776(1)	A	$0	7,165	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 in full on March 6, 2027, provided that the Reporting Person remains in continuous service with the Issuer through the vesting date.

	/s/ Ambra R. Roth, Attorney-in-Fact	03/10/2026
	** 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.