Large insider resale reported for MTSI (NASDAQ: MTSI) in Form 144 filing

Rhea-AI Filing Summary

Form 144 notice reports proposed sales of Common Stock by an individual identified as Susan Ocampo. The filing lists a prior issuance of Founder Shares: 400,000 shares (11/21/2023) and multiple sale entries between 02/12/2026 and 05/06/2026, including large single-day transactions such as 261,763 shares on 02/25/2026 and 200,000 shares on 03/02/2026. The filing is a routine notice of intended resale under Rule 144 reporting numerous dispositions by the holder.

Insights

Securities Compliance Attorney

Routine Rule 144 resale notice showing multiple dispositions by a single holder.

The document is a procedural Form 144 listing proposed sales of Common Stock by Susan Ocampo, including an earlier listing of Founder Shares: 400,000. Multiple dated sale entries from 02/12/2026 through 05/06/2026 appear in the excerpt.

Key compliance items to confirm in subsequent filings are the method of sale, holding-period qualifications under Rule 144, and whether actual transactions match the proposed amounts; timing and broker/dealer details are not shown in the excerpt.

Key Figures

Founder Shares: 400,000 shares Largest single-day sale listed: 261,763 shares Notable sale: 200,000 shares +2 more

5 metrics

Founder Shares 400,000 shares Securities To Be Sold entry dated 11/21/2023

Largest single-day sale listed 261,763 shares Sale dated 02/25/2026

Notable sale 200,000 shares Sale dated 03/02/2026

Recent sale listed 176,663 shares Sale dated 05/06/2026

Reported aggregate numeric field 132655087.07 Value appearing in securities header row (as presented in excerpt)

Key Terms

Form 144, Founder Shares, Rule 144

3 terms

Form 144 regulatory

"Listed as the header and filing type for proposed resale notices"

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.

Founder Shares market

"Securities To Be Sold section showing 'Founder Shares 400000 11/21/2023'"

Founder shares are the ownership stakes given to the people who start a company, often with extra voting power or protections compared with ordinary shares. For investors, they matter because founders’ control and incentives influence decisions about strategy, hiring, and whether the company sells or stays independent — like a family that keeps majority voting rights in a household decision. High founder ownership can mean stable leadership but also a risk that outside shareholders have less influence.

Rule 144 regulatory

"Implied by the use of Form 144 for resale of restricted or control securities"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

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	400000	132655087.07	75011970	05/07/2026	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	11/21/2023	Founder Shares	Issuer			400000	11/21/2023	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 Box #88439 Honolulu HI 96830	Common	02/12/2026	57827	13897141
Susan Ocampo Box #88439 Honolulu HI 96830	Common	02/13/2026	42173	10136319
Susan Ocampo Box #88439 Honolulu HI 96830	Common	02/13/2026	19877	4870489
Susan Ocampo Box #88439 Honolulu HI 96830	Common	02/17/2026	80123	19655435
Susan Ocampo Box #88439 Honolulu HI 96830	Common	02/18/2026	3156	789003
Susan Ocampo Box #88439 Honolulu HI 96830	Common	02/24/2026	53509	13381379
Susan Ocampo Box #88439 Honolulu HI 96830	Common	02/25/2026	261763	66600315
Susan Ocampo Box #88439 Honolulu HI 96830	Common	03/02/2026	200000	50539095
Susan Ocampo Box #88439 Honolulu HI 96830	Common	03/25/2026	100000	24505253.65
Susan Ocampo Box #88439 Honolulu HI 96830	Common	04/08/2026	200000	49044227.56
Susan Ocampo Box #88439 Honolulu HI 96830	Common	04/10/2026	15221	3928692.31
Susan Ocampo Box #88439 Honolulu HI 96830	Common	04/13/2026	100000	26190830.39
Susan Ocampo Box #88439 Honolulu HI 96830	Common	04/14/2026	61898	16356261.77
Susan Ocampo Box #88439 Honolulu HI 96830	Common	04/15/2026	76218	19893766.89
Susan Ocampo Box #88439 Honolulu HI 96830	Common	04/16/2026	100000	26193350
Susan Ocampo Box #88439 Honolulu HI 96830	Common	04/17/2026	87888	23770803.7
Susan Ocampo Box #88439 Honolulu HI 96830	Common	04/21/2026	66541	19044326.54
Susan Ocampo Box #88439 Honolulu HI 96830	Common	04/24/2026	100000	29019401.25
Susan Ocampo Box #88439 Honolulu HI 96830	Common	05/06/2026	176663	54528345.41

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 the MTSI Form 144 filing mean?

It is a notice of proposed resale under Rule 144 by a holder. The excerpt lists dated sales and a prior 400,000 founder share entry, documenting intended dispositions rather than company actions.

Who is selling shares in the MTSI Form 144?

The filing identifies Susan Ocampo as the reporting holder. The excerpt lists multiple sales attributed to her between 02/12/2026 and 05/06/2026, with specific share counts per date.

How many Founder Shares are referenced in this MTSI filing?

The excerpt shows Founder Shares: 400,000 shares with an entry date of 11/21/2023. That label appears under the "Securities To Be Sold" section of the excerpt.

Do the Form 144 entries indicate completed sales for MTSI?

Form 144 lists proposed or planned sales under Rule 144, not guaranteed completed trades. The excerpt shows dated sale entries but does not confirm settlement or execution details.

Are dollar values shown for the MTSI sales in this excerpt?

The excerpt includes numeric amounts adjacent to sale dates (e.g., 261763 shares and 66600315) listed per row. The filing text does not label currency units explicitly in the excerpt.