SEC Form NT 10-K filed by VivoSim Labs Inc.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

SEC FILE NUMBER

Washington, D.C. 20549

001-35996

FORM 12b-25

CUSIP NUMBER

68620A302

NOTIFICATION OF LATE FILING

(Check One):

☒ Form 10-K ☐ Form 20-F ☐ Form 11-K ☐ Form 10-Q ☐ Form 10-D

☐ Form N-CEN ☐ Form N-CSR

For Period Ended: March 31, 2026

☐ Transition Report on Form 10-K

☐ Transition Report on Form 20-F

☐ Transition Report on Form 11-K

☐ Transition Report on Form 10-Q

For the Transition Period Ended:

Nothing in this form shall be construed to imply that the Commission has verified any information contained herein.

VivoSim Labs, Inc.

Full Name of Registrant

Former Name if Applicable

11555 Sorrento Valley Rd, Suite 100

Address of Principal Executive Office (Street and Number)

San Diego, California 92121

City, State and Zip Code

☒

(a)

The reason described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense;

(b)

The subject annual report, semi-annual report, transition report on Form 10-K, Form 20-F, Form 11-K, Form N-CEN or Form N-CSR, or portion thereof, will be filed on or before the fifteenth calendar day following the prescribed due date; or the subject quarterly report or transition report on Form 10-Q or subject distribution report on Form 10-D, or portion thereof, will be filed on or before the fifth calendar day following the prescribed due date; and

(c)

The accountant’s statement or other exhibit required by Rule 12b-25(c) has been attached if applicable.

(1)

Name and telephone number of person to contact in regard to this notification

Norman Staskey, Chief Financial Officer

(858)

224-1000

(Name)

(Area Code)

(Telephone Number)

(2)

Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed? If answer is no, identify report(s). ☒ Yes ☐ No

(3)

Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof? ☐ Yes ☒ No

Date: June 29, 2026

By:

/s/ Norman Staskey

Norman Staskey

Chief Financial Officer