Sonnet Biotherapeutics Holdings Inc.

12/16/2025 | Press release | Distributed by Public on 12/16/2025 15:47

Termination Notice (Form 15-12G)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 15

CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION

UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934

OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d)

OF THE SECURITIES EXCHANGE ACT OF 1934.

Commission File Number 001-35570

SONNET BIOTHERAPEUTICS HOLDINGS, INC.

(Exact name of registrant as specified in its charter)

100 Overlook Center, Suite 102

Princeton, New Jersey 08540

609-375-2227

(Address, including zip code, and telephone number, including area code, of registrant's principal executive offices)

Common Stock, $0.0001 par value per share

(Title of each class of securities covered by this Form)

None

(Titles of all other classes of securities for which a duty to file reports under Section 13(a) or 15(d) remains)

Please place an X in the box(es) to designate the appropriate rule provision(s) relied upon to terminate or suspend the duty to file reports:

Rule 12g-4(a)(1)
Rule 12g-4(a)(2)
Rule 12h-3(b)(1)(i)
Rule 12h-3(b)(1)(ii)
Rule 15d-6
Rule 15d-22(b)

Approximate number of holders of record as of the certification or notice date: One

Pursuant to the requirements of the Securities Exchange Act of 1934, Sonnet BioTherapeutics Holdings, Inc. has caused this certification/notice to be signed on its behalf by the undersigned duly authorized person.

Date: December 16, 2025 By:

/s/ Raghu Rao

Name: Raghu Rao
Title: Chief Executive Officer
Sonnet Biotherapeutics Holdings Inc. published this content on December 16, 2025, and is solely responsible for the information contained herein. Distributed via Edgar on December 16, 2025 at 21:47 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]