Form 8-K

8-K — GT Biopharma, Inc.

Accession: 0001493152-26-028457

Filed: 2026-06-12

Period: 2026-06-08

CIK: 0000109657

SIC: 2834 (PHARMACEUTICAL PREPARATIONS)

Item: Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year

Item: Financial Statements and Exhibits

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UNITED

STATES

SECURITIES

AND EXCHANGE COMMISSION

Washington,

D.C. 20549

FORM

8-K

CURRENT

REPORT

Pursuant

to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date

of Report (Date of earliest event reported): June 8, 2026

Biopharma, Inc.

(Exact

name of registrant as specified in its charter)

Delaware

(State

or other Jurisdiction of Incorporation)

1-40023

94-1620407

(Commission

File

Number)

(IRS

Employer

Identification

No.)

N/A1

(Address

of Principal Executive Offices and zip code)

(415)

919-4040

(Registrant’s

telephone number, including area code)

N/A

(Former

name or former address, if changed since last report)

Check

the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under

any of the following provisions:

☐

Written

communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐

Soliciting

material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐

Pre-commencement

communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐

Pre-commencement

communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities

registered pursuant to Section 12(b) of the Act:

Title

of each class

Trading

Symbol(s)

Name

of each exchange on which registered

Common

stock, $0.001 par value

GTBP

The

Nasdaq Stock Market LLC

Indicate

by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405

of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging

growth company ☐

an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying

with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Effective as of July 1, 2024, the Company became a fully remote company. We do not maintain a principal executive office. For purposes

of compliance with applicable requirements of the Securities Act of 1933, as amended, and the Securities Exchange Act of 1934, as amended,

any stockholder communication required to be sent to the Company’s principal executive offices may be directed to 505 Montgomery

Street, 10th Floor, San Francisco, California 94111, or by email to auditcommittee@gtbiopharma.com.

Item

5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.

June 8, 2026, the Board of Directors (the “Board”) of GT Biopharma, Inc., a Delaware corporation (the “Company”)

approved an amendment (the “Amendment”) to the Company’s Amended and Restated Bylaws, effective June 8, 2026, to reduce

the number of shares that are required to be present in person or by proxy at a meeting of the Company’s stockholders (a “Meeting”)

for purposes of establishing a quorum. Prior to the Amendment, the presence, in person or by proxy duly authorized, of the holders of

a majority of the outstanding shares of stock entitled to vote was required to establish a quorum for the transaction of business at

a Meeting. As approved in the Amendment, the presence, in person or by proxy duly authorized, of the holders of not less than one-third

(1/3) of the outstanding shares of stock entitled to vote will constitute a quorum for the transaction of business at a Meeting.

The

Board adopted the Amendment to be better able to obtain a quorum and conduct business at a Meeting. The Board based its decision on the

increasing prevalence of brokerage firms opting to forgo discretionary or proportionate voting of the shares held by them in street name,

which is making it increasingly difficult for companies to obtain a quorum of the majority. The change to the quorum requirement was

made to improve the Company’s ability to hold Meetings when called.

The

foregoing description of the Amendment is qualified by reference to the full text of the Amendment, which is attached to this Form 8-K

as Exhibit 3.1, and which is incorporated herein by reference.

Item

9.01 Financial Statements and Exhibits.

(d)

Exhibits.

Exhibit

Number

Description

3.1

Amendment No. 1 to the Amended and Restated Bylaws of GT Biopharma, Inc.

104

Cover

Page Interactive Data File, formatted in Inline XBRL

SIGNATURES

Pursuant

to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by

the undersigned hereunto duly authorized.

BIOPHARMA, INC.

Date:

June 12, 2026

By:

/s/

Alan Urban

Alan

Urban

Chief

Financial Officer

EX-3.1

Filename: ex3-1.htm · Sequence: 2

Exhibit

3.1

AMENDMENT

NO. 1

THE AMENDED AND RESTATED BYLAWS

BIOPHARMA, INC.

The

Amended and Restated Bylaws (“Bylaws”) of GT Biopharma, Inc. (the “Corporation”), are hereby amended

as follows, effective June 8, 2026:

Section

2.6 of the Bylaws of the Corporation is hereby amended and restated in its entirety to read as follows:

“2.6.

Quorum. At all meetings of stockholders, except where otherwise provided by law, the Certificate of Incorporation,

or these Bylaws, the presence, in person or by proxy duly authorized, of the holders of not less than one-third (1/3) of the outstanding

shares of stock entitled to vote shall constitute a quorum for the transaction of business. Where a separate vote by a class or series

or classes or series is required, not less than one-third (1/3) of the outstanding shares of such class or series or classes or series,

present in person or represented by proxy, shall constitute a quorum entitled to take action with respect to that vote on that matter,

except where otherwise provided by law, the Certificate of Incorporation or these Bylaws. Any shares, the voting of which at said meeting

have been enjoined, or which for any reason cannot be lawfully voted at such meeting, shall not be counted to determine a quorum at said

meeting. In the absence of a quorum, any meeting of stockholders may be adjourned, from time to time, by the chairman, which shall be

in the discretion of the chairman and without any action by the stockholders. At such adjourned meeting at which a quorum is present

or represented, any business may be transacted which might have been transacted at the original meeting. The stockholders present at

a duly called or convened meeting, at which a quorum is present, may continue to transact business until adjournment, notwithstanding

the withdrawal of enough stockholders to leave less than a quorum.”

Except

as specifically amended herein, the Bylaws shall remain unchanged and in full force and effect.

[Remainder

of page intentionally left blank]

The

undersigned hereby certifies that he is the duly elected or appointed, qualified, and acting Secretary of GT Biopharma,

Inc., a Delaware corporation, and that the foregoing Amendment to the Bylaws constitutes the entire amendment to the Bylaws, as duly

adopted by the Board of Directors on June 8, 2026.

/s/

Alan Urban

Name:

Alan Urban

Title:

Chief Financial Officer and Secretary

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Entity Central Index Key

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