# EDGAR Filing Document

**Accession Number:** 0000109657
**File Stem:** 0001493152-26-028457
**Filing Date:** 2026-6
**Character Count:** 9209
**Document Hash:** bd803823d0b5cc2e42d7d27c4dd06a24
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001493152-26-028457.hdr.sgml**: 20260612

**ACCESSION NUMBER**: 0001493152-26-028457

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20260608

**ITEM INFORMATION**: Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260612

**DATE AS OF CHANGE**: 20260612

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** GT Biopharma, Inc.
- **CENTRAL INDEX KEY:** 0000109657
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 941620407
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40023
- **FILM NUMBER:** 261087248

**BUSINESS ADDRESS:**
- **STREET 1:** 505 MONTGOMERY STREET
- **STREET 2:** 10TH FLOOR
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94111
- **BUSINESS PHONE:** (800) 304-9888

**MAIL ADDRESS:**
- **STREET 1:** 505 MONTGOMERY STREET
- **STREET 2:** 10TH FLOOR
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94111

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** OXIS INTERNATIONAL INC
- **DATE OF NAME CHANGE:** 19940916

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** DDI PHARMACEUTICALS INC
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** DIAGNOSTIC DATA INC /DE/
- **DATE OF NAME CHANGE:** 19850312

?xml version='1.0' encoding='ASCII'?

**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

**GT Biopharma, Inc.**

(Exact name of registrant as specified in its charter)

**Delaware**

(State or other Jurisdiction of Incorporation)

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| | |
|:---|:---|
| **1-40023** | **94-1620407** |
| (Commission<br> File Number) | (IRS Employer<br> Identification No.) |

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**N/A<sup>1</sup>**

(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:

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| | | |
|:---|:---|:---|
| 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 |

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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 ☐

If 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. ☐

<sup>1</sup> 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.**

On 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.

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| | |
|:---|:---|
| **Exhibit**<br> **Number** | **Description** |
| 3.1 | [Amendment No. 1 to the Amended and Restated Bylaws of GT Biopharma, Inc.](ex3-1.htm) |
| 104 | Cover Page Interactive Data File, formatted in Inline XBRL |

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**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.

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| | | |
|:---|:---|:---|
|  | **GT BIOPHARMA, INC.** | **GT BIOPHARMA, INC.** |
| Date: June 12, 2026 | By: | */s/ Alan Urban* |
|  |  | Alan Urban |
|  |  | Chief Financial Officer |

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## Exhibit 3.1

**Exhibit 3.1**

**AMENDMENT NO. 1**

**TO THE AMENDED AND RESTATED BYLAWS**

**OF**

**GT BIOPHARMA, INC.**

The Amended and Restated Bylaws ("**Bylaws**") of GT Biopharma, Inc. (the "**Corporation**"), are hereby amended as follows, effective June 8, 2026:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1. Section
 2.6 of the Bylaws of the Corporation is hereby amended and restated in its entirety to read as follows:

"2.6. <u>Quorum</u>*.*** 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."

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2. 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.

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| |
|:---|
| */s/ Alan Urban* |
| Name: Alan Urban |
| Title: Chief Financial Officer and Secretary |

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