MACOM (MTSI) investor Susan Ocampo reports 6.4% stake in 13G/A update

Rhea-AI Filing Summary

MACOM Technology Solutions Holdings, Inc. had its ownership information updated by shareholder Susan M. Ocampo in Amendment No. 19 to a Schedule 13G. Ocampo reports beneficial ownership of 4,884,490 shares of common stock, representing 6.4% of the class, based on 76,295,774 shares outstanding as of June 30, 2026.

All 4,884,490 shares are held through trusts: 2,496,234 shares in two Ocampo Family Trusts, 1,890,850 shares in three trusts for her children, and 497,406 shares in a grantor retained annuity trust. She has shared voting and dispositive power over all reported shares and no sole voting or sole dispositive power.

Key Figures

Shares beneficially owned: 4,884,490 shares Ownership percentage: 6.4% Shares outstanding: 76,295,774 shares +5 more

8 metrics

Shares beneficially owned 4,884,490 shares Common stock beneficially owned by Susan M. Ocampo

Ownership percentage 6.4% Percent of MACOM common stock class beneficially owned

Shares outstanding 76,295,774 shares Common stock outstanding as of June 30, 2026

Ocampo Family Trusts holdings 2,496,234 shares Shares held in two Ocampo Family Trusts

Children’s trusts holdings 1,890,850 shares Shares held in three trusts for Ocampo’s children

Grantor retained annuity trust holdings 497,406 shares Shares held in a grantor retained annuity trust

Shared voting power 4,884,490 shares Shares over which Ocampo has shared voting power

Sole voting power 0 shares Shares over which Ocampo has sole voting power

Key Terms

beneficially owned, grantor retained annuity trust, shared voting power, shared dispositive power, +1 more

5 terms

beneficially owned financial

"The 4,884,490 shares reported as beneficially owned by the Reporting Person"

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 financial

"and (iii) 497,406 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.

shared voting power financial

"6 | Shared Voting Power 4,884,490.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

shared dispositive power financial

"8 | Shared Dispositive Power 4,884,490.00"

Schedule 13G regulatory

"This Amendment No. 19 to is filed by Susan M. Ocampo"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

FAQ

How many MACOM (MTSI) shares does Susan M. Ocampo report owning in this Schedule 13G/A?

Susan M. Ocampo reports beneficial ownership of 4,884,490 shares of MACOM common stock. This stake is disclosed in Amendment No. 19 and is held entirely through various family and grantor retained annuity trusts.

What percentage of MACOM (MTSI) common stock does Susan M. Ocampo beneficially own?

Susan M. Ocampo reports owning 6.4% of MACOM’s outstanding common stock. This percentage is calculated based on 76,295,774 shares of common stock outstanding as of June 30, 2026, as stated in the filing.

How are Susan M. Ocampo’s MACOM (MTSI) shares held according to the Schedule 13G/A?

The 4,884,490 shares are held through trusts: 2,496,234 shares in two Ocampo Family Trusts, 1,890,850 shares in three children’s trusts, and 497,406 shares in a grantor retained annuity trust, all with Ocampo as trustee.

What voting and dispositive powers does Susan M. Ocampo have over her MACOM (MTSI) shares?

Susan M. Ocampo reports 0 shares with sole voting or dispositive power and 4,884,490 shares with shared voting and shared dispositive power. As trustee of the trusts, she can vote and dispose of those shares.

What is the reference date for MACOM (MTSI) shares outstanding used in this ownership calculation?

The ownership percentage is based on 76,295,774 shares of MACOM common stock outstanding as of June 30, 2026. This figure is used to compute Susan M. Ocampo’s 6.4% beneficial ownership stake.

Where is Susan M. Ocampo’s principal business or residence address in this MACOM (MTSI) filing?

Susan M. Ocampo lists her address as Box #88439, Honolulu, HI 96815. The issuer, MACOM Technology Solutions Holdings, Inc., lists principal executive offices at 100 Chelmsford Street, Lowell, MA 01851.

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Available on EDGAR 08/12/2026 - 03:02 PM Accepted by SEC EDGAR 08/12/2026 - 03:02 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 19)

MACOM Technology Solutions Holdings, Inc.

(Name of Issuer)

Common Stock, $0.001 par value

(Title of Class of Securities)

55405Y100

(CUSIP Number)

06/30/2026

(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 4,884,490.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 4,884,490.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,884,490.00

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)

6.4 %

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. 19 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, and Amendment No. 18 thereto filed on May 5, 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. 19 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 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
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 4,884,490 shares reported as beneficially owned by the Reporting Person consists of (i) an aggregate of 2,496,234 shares held by Susan M. Ocampo as trustee of two Ocampo Family Trusts, (ii) an aggregate of 1,890,850 shares held by Susan M. Ocampo as trustee of three trusts for the benefit of her children and (iii) 497,406 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 76,295,774 shares of Common Stock outstanding as of June 30, 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:	08/12/2026