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Employer with a benefit plan

GT BIOPHARMA, INC.

The Employer Identification Number (EIN) for GT BIOPHARMA, INC. is 94-1620407.

At a glance

EIN
94-1620407 · 941620407
Legal name
GT BIOPHARMA, INC.
Also filed as
OXIS INTERNATIONAL INC
Address on file
505 MONTGOMERY STREET, 10TH FL., SAN FANCISCO, CA 94111
Records show
SEC filer; employer with a benefit plan; state registration
Latest record
2026-09-03

State registration

Florida Division of Corporations (Sunbiz) bulk data · records as of 2026-07-10

Florida registration
Inactive · Foreign profit corporation
Source: Florida registry · as of 2026-07-10
Florida document number
F15000003703
Source: Florida registry · as of 2026-07-10
Registered in Florida
2015-08-20
Source: Florida registry · as of 2026-07-10
Registered agent
WELDON STEVEN
Source: Florida registry · as of 2026-07-10
Last registry activity
2018-09-28
Source: Florida registry · as of 2026-07-10

SEC records

SEC EDGAR company filings · records as of 2026-09-03

SEC CIK
0000109657
Source: SEC · as of 2026-09-03
Industry (SIC)
Pharmaceutical Preparations (2834)
Source: SEC · as of 2026-09-03
State of incorporation
DE
Source: SEC · as of 2026-09-03
Ticker
GTBP
Source: SEC · as of 2026-09-03
Latest SEC filing
8-K 2026-09-03
Source: SEC · as of 2026-09-03

Benefit plans

DOL Form 5500-SF filings (EFAST2) · records as of 2025-07-04

Benefit plan 1, 2024 filing
GT BIOPHARMA, INC. 401(K) PLAN
Source: DOL 5500-SF · as of 2025-07-04
Participants (start of year)
2
Source: DOL 5500-SF · as of 2025-07-04
Plan assets (end of year)
$111,999
Source: DOL 5500-SF · as of 2025-07-04
Plan features
Profit-sharing; ERISA 404(c) plan; Participant-directed; 401(k) feature; 401(m) matching; Automatic enrollment
Source: DOL 5500-SF · as of 2025-07-04

What this record is

Public filings that carry this EIN (DOL Form 5500-SF filings (EFAST2), Florida Division of Corporations (Sunbiz) bulk data and SEC EDGAR company filings), shown as filed. Nothing is scraped from the IRS, and a public-record match is not IRS TIN validation.

What it is not

Registry status, formation date, and registered agent come from the California Secretary of State, Business Programs Division (Business Entities); see the California business entity search.

If something is wrong

A name, address, or classification here is what the source published. To correct the source, file with it; to have this page removed, see corrections and removal.

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