Sec Form 3 Filing - Tansey Casey M @ Mobia Medical, Inc. - 2026-05-07

FORM 3 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Tansey Casey M 2. Issuer Name and Ticker or Trading Symbol Mobia Medical, Inc. [ MOBI] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 2802 FLINTROCK TRACE, SUITE 226 3. Date of Earliest Transaction (MM/DD/YY) 05/07/2026 (Street) AUSTIN, TX78738 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Series F Preferred Stock ( 1 ) ( 1 ) ( 1 ) Common Stock 1,620,078 I See Footnote ( 2 ) ( 3 ) ( 4 ) Series E-2 Preferred Stock ( 1 ) ( 1 ) ( 1 ) Common Stock 1,692,658 I See Footnote ( 2 ) ( 3 ) ( 4 ) Convertible Notes ( 5 ) ( 5 ) ( 5 ) Common Stock 166,666 D Convertible Notes ( 5 ) ( 5 ) ( 5 ) Common Stock 314,090 I By U.S. Venture Partners Select Fund I, L.P

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Tansey Casey M 2802 FLINTROCK TRACE, SUITE 226 AUSTIN, TX78738 X Signatures /s/ Chase Leavitt, Attorney-in-Fact 05/07/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Each share of our Series F Preferred Stock and Series E-2 Preferred Stock will convert into Common Stock immediately prior to the completion of the Issuer's initial public offering pursuant to its terms. ( 2 )Consists of (i) 1,309,155 shares of Common Stock underlying Series F Preferred Stock held by U.S. Venture Partners Select Fund I, L.P. ("USVP SFI") on its own behalf and as a nominee for U.S. Venture Partners Select Fund I-A, L.P. ("USVP SFI-A" and, together with USVP SFI, the "USVP Select Funds"), (ii) 1,610,903 shares of Common Stock underlying Series E-2 Preferred Stock and 295,906 shares of Common Stock underlying Series F Preferred Stock held by U.S. Venture Partners XII, L.P. ("USVP XII"), and (iii) 81,755 shares of Common Stock underlying Series E-2 Preferred Stock and 15,017 shares of Common Stock underlying Series F Preferred Stock held by U.S. Venture Partners XII-A, L.P. ("USVP XII-A" and, together with USVP XII, the "USVP XII Funds"). ( 3 )Presidio Management Group XII, L.L.C. ("PMG XII") is the general partner of USVP XII and USVP XII-A and may be deemed to have sole voting and dispositive power with respect to the shares held by USVP XII and USVP XII-A. Presidio Management Group Select Fund I, L.L.C. ("PMG Select") is the general partner of USVP SFI and USVP SFI-A and may be deemed to have sole voting and dispositive power with respect to the securites held by USVP SFI and USVP SFI-A. ( 4 )The Reporting Person is the managing partner and a managing member of each of PMG XII and PMG Select, and may be deemed to share voting and dispositive power with respect to the securites described herein. The Reporting Person disclaims beneficial ownership of such holdings, except to the extent of his pecuniary interest in the shares. ( 5 )The Convertible Notes will automatically convert into Common Stock immediately prior to the closing of the Issuer's initial public offering (the "Offering"). The conversion price is the lower of (a) 80% of the Offering price per share and (b) the valuation of the Issuer immediately prior to the closing of the Offering divided by the number of fully diluted shares of capital stock (on an as-converted basis) outstanding immediately prior to Offering, excluding the Convertible Notes.

Remarks: Exhibit 24 - Power of Attorney.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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