Large MTSI (MTSI) holder files Rule 144 to sell 19,877 shares

Rhea-AI Filing Summary

A stockholder of MTSI has filed a Rule 144 notice to sell 19,877 shares of common stock. The planned sale, through The Charles Schwab Corporation as broker, has an aggregate market value of 4,870,489, with 75,011,970 shares reported outstanding and an approximate sale date of 02/13/2026 on NASDAQ.

The seller, identified as Susan Ocampo of Honolulu, acquired these founder shares from the issuer on 11/21/2023. She also reported multiple sales of common stock during the past three months, including individual transactions such as 100000 shares on 02/03/2026 for gross proceeds of 23,029,116 and 100000 shares on 02/06/2026 for gross proceeds of 23,584,697.

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	19877	4870489	75011970	02/13/2026	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			19877	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	12/02/2025	4171	750780.00
Susan Ocampo Box #88439 Honolulu HI 96830	Common	12/03/2025	95829	17255136.70
Susan Ocampo Box #88439 Honolulu HI 96830	Common	12/04/2025	2291	435290
Susan Ocampo Box #88439 Honolulu HI 96830	Common	12/05/2025	76642	14569250
Susan Ocampo Box #88439 Honolulu HI 96830	Common	12/09/2025	121067	23011418
Susan Ocampo Box #88439 Honolulu HI 96830	Common	02/03/2026	100000	23029116
Susan Ocampo Box #88439 Honolulu HI 96830	Common	02/06/2026	100000	23584697
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

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 Form 144 filing for MTSI disclose about upcoming share sales?

The filing shows a stockholder intends to sell 19,877 MTSI common shares under Rule 144. The planned NASDAQ sale, routed through The Charles Schwab Corporation, carries an aggregate market value of 4,870,489, with 75,011,970 shares reported outstanding at the time.

Who is the selling security holder named in the MTSI Form 144?

The selling security holder is identified as Susan Ocampo, with an address in Honolulu, Hawaii. The notice states that the 19,877 common shares to be sold were acquired as founder shares from the issuer on 11/21/2023, with payment also dated 11/21/2023.

How many MTSI shares has the seller reported selling in the past three months?

The filing lists multiple past sales of MTSI common stock by Susan Ocampo over three months. Individual transactions include amounts such as 121,067 shares on 12/09/2025 and 100,000 shares on 02/03/2026, each with separately reported gross proceeds for every sale date.

What gross proceeds are reported for recent MTSI share sales by the filer?

The document details gross proceeds for each sale, such as 17,255,136.70 on 12/03/2025 and 23,029,116 on 02/03/2026. Additional reported proceeds include 23,584,697 on 02/06/2026 and 13,897,141 on 02/12/2026, tied to corresponding share amounts sold.

When were the MTSI founder shares to be sold under Form 144 originally acquired?

The 19,877 MTSI common shares covered by this notice were acquired on 11/21/2023 as founder shares. The filing states they were obtained directly from the issuer, with the date of payment also recorded as 11/21/2023 and the nature of payment described as N/A.

On which exchange and approximate date is the MTSI Rule 144 sale expected?

The filing lists NASDAQ as the securities exchange for the planned sale of 19,877 common shares. The approximate date of sale is stated as 02/13/2026, with The Charles Schwab Corporation named as the broker handling the transaction from its Westlake, Texas address.