MTSI: Form 144 shows insider sale of restricted shares

MTSI reported a Form 144 disclosing insider sales of Common Stock.

Rhea-AI Filing Summary

MTSI reported a Form 144 disclosing insider sales of Common Stock. The cover-area rows list 1,623 shares with an associated figure of $587,266.32 and a date of 05/11/2026. A separate entry shows Geoffrey Ribar sold 2,244 shares on 02/25/2026 for $569,051.92.

The filing identifies the securities as Restricted Stock and names the Issuer and broker information. This Form 144 is a routine disclosure of proposed or completed sales by an affiliate and does not itself state proceeds recipients or additional conditions.

Insights

Securities Compliance Analyst

Routine Form 144 sale notice showing affiliate sales of restricted shares.

The filing lists specific share counts and dollar figures: 1,623 shares (cover area) with $587,266.32 noted alongside a 05/11/2026 entry, and a disclosed sale by Geoffrey Ribar of 2,244 shares on 02/25/2026 totaling $569,051.92. The securities are labeled as Restricted Stock.

These notices are administrative: the form documents affiliate resale activity rather than company actions. Cash‑flow treatment and additional transfer conditions are not specified in the excerpt; future filings or broker reports would show settlement details.

Key Figures

Cover shares: 1,623 shares Cover aggregate dollar amount: $587,266.32 Sale by Geoffrey Ribar: 2,244 shares

3 metrics

Cover shares 1,623 shares listed in cover-area row with date <date>05/11/2026</date>

Cover aggregate dollar amount $587,266.32 associated figure in cover-area row

Sale by Geoffrey Ribar 2,244 shares sold on <date>02/25/2026</date> for <money>$569,051.92</money>

Key Terms

Restricted Stock, Form 144, Issuer

3 terms

Restricted Stock financial

"Common | 03/07/2026 | Restricted Stock | Issuer"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

Form 144 regulatory

"Filer Information | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

Issuer financial

"Restricted Stock | Issuer | 1623 | 03/07/2026"

FAQ

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

What does the MTSI Form 144 disclose?

The Form 144 discloses proposed or completed insider sales of Common Stock: 1,623 shares with $587,266.32 shown and Geoffrey Ribar sold 2,244 shares on 02/25/2026 for $569,051.92.

Who is listed as the selling person in the filing?

The filing lists Geoffrey Ribar at 100 Chelmsford Street, Lowell MA, as a selling person who reported selling 2,244 shares on 02/25/2026 with an aggregate figure of $569,051.92.

What class of securities is covered by this Form 144?

The Form 144 covers Common stock identified as Restricted Stock in the excerpt, with broker/issuer details shown and dates including 05/11/2026 and 03/07/2026 in the cover area.

Does the filing state who receives the sale proceeds?

The excerpt does not specify proceeds recipients; it shows dollar figures ($587,266.32, $569,051.92) but does not state whether proceeds go to the issuer or the selling holder.

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

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Accepted by SEC EDGAR 05/11/2026 - 04:41 PM EDT Learn about SEC filing 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	0001247434
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.
SEC File Number	001-35451
Address of Issuer	100 Chelmsford Street Lowell MASSACHUSETTS 01851
Phone	(978) 656-2500
Name of Person for Whose Account the Securities are To Be Sold	GEOFFREY RIBAR
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	Director

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	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	1623	587266.32	76295774	05/11/2026	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	03/07/2026	Restricted Stock	Issuer			1623	03/07/2026	Not Applicable

* 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
GEOFFREY RIBAR 100 Chelmsford Street Lowell MA 01851	Common	02/25/2026	2244	569051.92

144: Remarks and Signature

Remarks
Date of Notice	05/11/2026
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	/s/ Geoffrey George Ribar
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)