Amendment shows Susan Ocampo holds 6.80M MTSI shares (9.1%) — MTSI

Rhea-AI Filing Summary

MACOM Technology Solutions Holdings, Inc. reports an amended Schedule 13G/A showing 6,801,395 shares of Common Stock beneficially owned by Susan M. Ocampo, representing 9.1% of the class. Shares outstanding are 75,011,970 as of March 31, 2026. The holdings are held in multiple trusts for family beneficiaries, with shared voting and dispositive power reported.

Insights

Governance Analyst

Passive ownership update: trustee holds 6.80M shares (9.1%).

The amendment restates beneficial ownership details for Susan M. Ocampo, who reports voting and dispositive power over shares held in family trusts and a grantor retained annuity trust. The filing lists precise share counts and an March 31, 2026 outstanding share base for the percentage calculation.

Cash‑flow treatment or sale intent is not disclosed; subsequent filings would be needed to show any change in trading activity or dispositions.

Key Figures

Beneficially owned shares: 6,801,395 shares Percent of class: 9.1% Shares outstanding: 75,011,970 shares

3 metrics

Beneficially owned shares 6,801,395 shares reported beneficial ownership by Susan M. Ocampo

Percent of class 9.1% percentage ownership based on shares outstanding as of March 31, 2026

Shares outstanding 75,011,970 shares shares outstanding as of March 31, 2026 used to calculate percentage

Key Terms

Schedule 13G/A, beneficially owned, grantor retained annuity trust

3 terms

Schedule 13G/A regulatory

"This Amendment No. 18 to the Schedule 13G/A is filed by Susan M. Ocampo"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

beneficially owned financial

"The 6,801,395 shares reported as beneficially owned by the Reporting Person consists of"

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.

grantor retained annuity trust legal

"938,631 shares held in a grantor retained annuity trust"

A grantor retained annuity trust (GRAT) is an estate-planning tool where the person who creates the trust transfers assets into it but receives fixed cash payments (an annuity) from the trust for a set number of years; whatever remains after that term passes to designated beneficiaries. It matters to investors because it can shift future appreciation of assets out of the creator’s taxable estate—like putting an asset into a timed vending machine that pays you fixed amounts while any extra value that grows inside the machine goes to heirs with reduced gift or estate tax consequences.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 18)

MACOM Technology Solutions Holdings, Inc.

(Name of Issuer)

Common Stock, $0.001 par value

(Title of Class of Securities)

55405Y100

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 55405Y100

1

Names of Reporting Persons

Susan M. Ocampo

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 6,801,395.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 6,801,395.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

6,801,395.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

9.1 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: MACOM Technology Solutions Holdings, Inc.
(b)	Address of issuer's principal executive offices: 100 Chelmsford Street, Lowell, MA 01851
Item 2.
(a)	Name of person filing: This Amendment No. 18 to Schedule 13G is filed by Susan M. Ocampo. Reference is hereby made to the Schedule 13G filed with the Securities and Exchange Commission on February 14, 2013, Amendment No. 1 thereto filed on February 12, 2014, Amendment No. 2 thereto filed on February 18, 2015, Amendment No. 3 thereto filed on February 10, 2016, Amendment No. 4 thereto filed on January 12, 2017, Amendment No. 5 thereto filed on January 11, 2018, Amendment No. 6 thereto filed on January 16, 2019, Amendment No. 7 thereto filed on January 15, 2020, Amendment No. 8 thereto filed on January 6, 2021, Amendment No. 9 thereto filed on January 18, 2022, Amendment No. 10 thereto filed on January 12, 2023, Amendment No. 11 thereto filed on January 23, 2024, Amendment No. 12 thereto filed on October 28, 2024, Amendment No. 13 thereto filed on February 10, 2025, Amendment No. 14 thereto filed on April 21, 2025, Amendment No. 15 thereto filed on July 24, 2025, Amendment No. 16 thereto filed on October 20, 2025, and Amendment No. 17 thereto filed on January 28, 2026 (as so amended, the "Schedule 13G"). Terms defined in the Schedule 13G are used herein as so defined. The items responded to in this Amendment No. 18 are hereby amended and restated.
(b)	Address or principal business office or, if none, residence: Box #88439 Honolulu, HI, 96815
(c)	Citizenship: United States
(d)	Title of class of securities: Common Stock, $0.001 par value
(e)	CUSIP No.: 55405Y100
Item 4.	Ownership
(a)	Amount beneficially owned: The information required by this paragraph is set forth in the cover page to this Schedule 13G/A and is incorporated herein by reference. The 6,801,395 shares reported as beneficially owned by the Reporting Person consists of (i) an aggregate of 3,285,430 shares held by Susan M. Ocampo as trustee of two Ocampo Family Trusts, (ii) an aggregate of 2,577,334 shares held by Susan M. Ocampo as trustee of three trusts for the benefit of her children and (iii) 938,631 shares held in a grantor retained annuity trust (collectively, the "Trusts"). Susan M. Ocampo is the trustee of each of the Trusts and has voting and dispositive power over the shares held by the Trusts.
(b)	Percent of class: The information required by this paragraph is set forth in the cover page to this Schedule 13G/A and is incorporated herein by reference. Percentage ownership is based on 75,011,970 shares of Common Stock outstanding as of March 31, 2026.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: The information required by this paragraph is set forth in the cover page to this Schedule 13G/A and is incorporated herein by reference.
	(ii) Shared power to vote or to direct the vote: The information required by this paragraph is set forth in the cover page to this Schedule 13G/A and is incorporated herein by reference.
	(iii) Sole power to dispose or to direct the disposition of: The information required by this paragraph is set forth in the cover page to this Schedule 13G/A and is incorporated herein by reference.
	(iv) Shared power to dispose or to direct the disposition of: The information required by this paragraph is set forth in the cover page to this Schedule 13G/A and is incorporated herein by reference.
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.	Certifications:
	Not Applicable

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Susan M. Ocampo

Signature:	/s/ Susan M. Ocampo
Name/Title:	Susan M. Ocampo, Individually
Date:	05/05/2026

FAQ

What stake does Susan M. Ocampo report in MTSI?

Susan M. Ocampo reports 6,801,395 shares, representing 9.1% of the class. This figure is based on 75,011,970 shares outstanding as of March 31, 2026 and is disclosed in Amendment No. 18 to the Schedule 13G/A.

How are the 6.80M shares held according to the filing?

The shares are held through family trusts: 3,285,430 shares in two Ocampo Family Trusts, 2,577,334 in three trusts for her children, and 938,631 in a grantor retained annuity trust, with Ms. Ocampo serving as trustee and reporting voting power.

Does the filing indicate Ms. Ocampo intends to sell MTSI shares?

No sale intent or plan is disclosed in this amendment. The filing reports beneficial ownership and voting/dispositive power; it does not state any planned transactions, proceeds, or timing for sales or transfers.

What date is used to calculate the ownership percentage?

The ownership percentage is calculated using the outstanding share count of 75,011,970 shares as of March 31, 2026, which the amendment cites when stating the 9.1% beneficial ownership figure.

Who has voting and dispositive power over the reported shares?

Susan M. Ocampo reports shared voting power of 6,801,395 and shared dispositive power of 6,801,395 over the shares held by the trusts, reflecting her role as trustee for the listed trusts.