[144] MACOM Technology Solutions Holdings, Inc. SEC Filing

Rhea-AI Filing Summary

MACOM Technology Solutions Holdings, Inc. (MTSI) filing a Form 144 reports a proposed sale of 150,000 common shares with an aggregate market value of $19,195,500.00. The shares were originally acquired as founder shares on 06/30/2009. The filing names Susan O'Campo as the recent seller in multiple transactions: nine sales between 09/05/2025 and 09/18/2025 and one sale on 10/07/2025, totaling 808,911 shares sold in the past three months. The issuer shows 74,471,281 shares outstanding, and the proposed sale is scheduled for approximately 10/08/2025 on NASDAQ. The notice includes the standard insider representation that no material nonpublic information is known.

Positive

• Planned sale is disclosed under Form 144, providing transparency on insider selling
• Seller previously reported multiple sales, making the disposition pattern publicly visible

Negative

• Insider sold 808,911 shares in the past three months, a noticeable disposition of holdings
• Proposed sale equals 150,000 shares (~0.20% of outstanding), continuing recent material sales

Insights

Insider Trading/Compliance Analyst

Insider plans a 150,000-share sale after prior large disposals totaling 808,911 shares.

The filing documents a proposed sale of 150,000 founder shares with a stated market value of $19,195,500, and lists prior disposals by Susan O'Campo totaling 808,911 shares in the past three months. Given the issuer's reported outstanding share count of 74,471,281, recent sales represent roughly 1.09% of the outstanding stock, indicating a meaningful but not controlling reduction in insider holdings.

Compliance risks center on Rule 144 timing and volume requirements and the signatory's representation of no material nonpublic information. Monitor execution around 10/08/2025 for actual trade reporting and any follow-up filings that change the intended amount or dates.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	The Charles Schwab Corporation 3000 Schwab Way Westlake TX 76262	150000	19195500.00	74471281	10/08/2025	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	06/30/2009	Founder Shares	Issuer			150000	06/03/2009	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
SUSAN OCAMPO 100 CHELMSFORD STREET LOWELL MA 01851	Common	09/05/2025	113275	14885388.00
SUSAN OCAMPO 100 CHELMSFORD STREET LOWELL MA 01851	Common	09/08/2025	3195	421918.00
SUSAN OCAMPO 100 CHELMSFORD STREET LOWELL MA 01851	Common	09/09/2025	45986	6029536.00
SUSAN OCAMPO 100 CHELMSFORD STREET LOWELL MA 01851	Common	09/10/2025	50361	6679719.00
SUSAN OCAMPO 100 CHELMSFORD STREET LOWELL MA 01851	Common	09/11/2025	80891	10716701.00
SUSAN OCAMPO 100 CHELMSFORD STREET LOWELL MA 01851	Common	09/12/2025	89868	11940024.00
SUSAN OCAMPO 100 CHELMSFORD STREET LOWELL MA 01851	Common	09/15/2025	150424	19920486.00
SUSAN OCAMPO 100 CHELMSFORD STREET LOWELL MA 01851	Common	09/17/2025	62435	8305195.00
SUSAN OCAMPO 100 CHELMSFORD STREET LOWELL MA 01851	Common	09/18/2025	150000	19964226.00
Susan O'Campo 100 Chelmsford Street Lowell MA 01851	Common	10/07/2025	62476	8323322.80

144: Remarks and Signature

Remarks

Date of Notice

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does MTSI Form 144 disclose about insider selling?

The Form 144 discloses a proposed sale of 150,000 common shares valued at $19,195,500 and prior sales by Susan O'Campo totaling 808,911 shares in the past three months.

When is the proposed sale of MTSI shares expected to occur?

The filing lists the approximate date of sale as 10/08/2025 and identifies the execution venue as NASDAQ.

How many MTSI shares are outstanding and what percent were sold recently?

The issuer reports 74,471,281 shares outstanding; recent insider disposals of 808,911 shares equal about 1.09% of the outstanding shares.

Who sold shares and how were the acquired shares described?

Sales are attributed to Susan O'Campo; the shares proposed for sale were acquired as founder shares on 06/30/2009.

Does the filing assert the seller has material nonpublic information?

By signing the notice, the seller represents they do not know any material adverse nonpublic information regarding the issuer.