GT Biopharma, Inc.

GTBP·NASDAQ·$0.39Share Price as of 11/2·$4MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/14/26 10-QQ1 ended 03/31/2605/15/26 10-Q/AQ2 ended 06/30/2503/06/26 10-Q/AQ3 ended 09/30/2503/06/26 10-KFY 202503/02/26

Disclosures

8-KCurrent report09/25/26 8-KCurrent report09/21/26 8-KCurrent report09/15/26 8-KCurrent report09/03/26 8-KCurrent report08/14/26

Prospectuses and Registrations

424B3Prospectus10/20/26 S-1Registration statement (IPO)10/09/26 424B3Prospectus05/13/26 S-1Registration statement (IPO)04/30/26 424B3Prospectus01/30/26

Proxies

DEF 14ADefinitive proxy10/13/26 PRE 14APreliminary proxy10/02/26 DEF 14ADefinitive proxy07/02/26 PRE 14APreliminary proxy06/18/26 DEF 14ADefinitive proxy06/11/25

Ownership

SC 13GBeneficial ownership09/15/26 Form 4Insider transaction09/08/25 Form 4Insider transaction09/08/25 Form 4Insider transaction09/08/25 Form 4Insider transaction09/08/25

Other

EFFECTRequest for effectiveness10/20/26 DD09/29/26 EFFECTRequest for effectiveness05/13/26 CORRESPCorrespondence with the SEC05/11/26 UPLOADLetter from the SEC05/06/26