tradingkey.logo
tradingkey.logo
Search

GT Biopharma Inc

GTBP
Add to Watchlist
0.439USD
+0.126+40.36%
Close 05/14, 16:00ETQuotes delayed by 15 min
11.21MMarket Cap
LossP/E TTM

GT Biopharma Inc

0.439
+0.126+40.36%

More Details of GT Biopharma Inc Company

GT Biopharma, Inc. is a clinical-stage biopharmaceutical company. The Company is focused on the development and commercialization of immuno-oncology therapeutic products based on its proprietary Tri-specific Killer Engager (TriKE) natural killer (NK) cell engager platform. Its TriKE platform is designed to harness and enhance the cancer-killing abilities of a patient’s immune system’s natural killer cells. Its product candidate pipeline includes GTB-3550, GTB-3650, GTB-5550, GTB-7550, GTB-6550, GTB-1050, and other product candidates. GTB-3550 is a TriKE comprised of two single-chain variable fragments (scFv) composed of the variable regions of the heavy and light chains of anti-CD16 and anti-CD33 antibodies and a modified form of IL-15. GTB-3650 is a TriKE which targets CD33 on the surface of myeloid leukemias. The Company also has a worldwide license agreement with the University of Minnesota to further develop and commercialize therapies using TriKE technology.

GT Biopharma Inc Info

Ticker SymbolGTBP
Company nameGT Biopharma Inc
IPO dateOct 22, 2013
CEOBreen (Michael)
Number of employees1
Security typeOrdinary Share
Fiscal year-endOct 22
Address505 Montgomery Street
CitySAN FRANCISCO
Stock exchangeNASDAQ OMX - NASDAQ BASIC
CountryUnited States of America
Postal code94111
Phone18003049888
Websitehttps://www.gtbiopharma.com/
Ticker SymbolGTBP
IPO dateOct 22, 2013
CEOBreen (Michael)

Company Executives of GT Biopharma Inc

Name
Name/Position
Position
Shareholding
Change
Mr. Charles J. (Chuck) Casamento
Mr. Charles J. (Chuck) Casamento
Independent Director
Independent Director
62.50K
--
Mr. Alan Louis Urban
Mr. Alan Louis Urban
Chief Financial Officer, Secretary
Chief Financial Officer, Secretary
50.00K
--
Mr. Michael Breen
Mr. Michael Breen
Executive Chairman of the Board, Chief Executive Officer
Executive Chairman of the Board, Chief Executive Officer
--
--
Ms. Hilary Kramer
Ms. Hilary Kramer
Independent Director
Independent Director
--
--
Mr. David Mun-Gavin
Mr. David Mun-Gavin
Non-Executive Independent Director
Non-Executive Independent Director
--
--
Mr. Corey Davis
Mr. Corey Davis
IR Contact Officer
IR Contact Officer
--
--
Name
Name/Position
Position
Shareholding
Change
Mr. Charles J. (Chuck) Casamento
Mr. Charles J. (Chuck) Casamento
Independent Director
Independent Director
62.50K
--
Mr. Alan Louis Urban
Mr. Alan Louis Urban
Chief Financial Officer, Secretary
Chief Financial Officer, Secretary
50.00K
--
Mr. Michael Breen
Mr. Michael Breen
Executive Chairman of the Board, Chief Executive Officer
Executive Chairman of the Board, Chief Executive Officer
--
--
Ms. Hilary Kramer
Ms. Hilary Kramer
Independent Director
Independent Director
--
--
Mr. David Mun-Gavin
Mr. David Mun-Gavin
Non-Executive Independent Director
Non-Executive Independent Director
--
--
Mr. Corey Davis
Mr. Corey Davis
IR Contact Officer
IR Contact Officer
--
--

Revenue Breakdown

Relevant data have not been disclosed by the company yet.
Relevant data have not been disclosed by the company yet.
By Business
By Region
Relevant data have not been disclosed by the company yet.

Shareholding Stats

Updated: 23 hours ago
Updated: 23 hours ago
Shareholders
Shareholder Types
Shareholders
Shareholders
Proportion
Bristol Capital Advisors, LLC
2.80%
Marzilli (Robert A)
2.22%
Vanguard Capital Management, LLC
1.43%
Breen (Michael Martin)
0.77%
Vanguard Fiduciary Trust Co
0.72%
Other
92.06%
Shareholders
Shareholders
Proportion
Bristol Capital Advisors, LLC
2.80%
Marzilli (Robert A)
2.22%
Vanguard Capital Management, LLC
1.43%
Breen (Michael Martin)
0.77%
Vanguard Fiduciary Trust Co
0.72%
Other
92.06%
Shareholder Types
Shareholders
Proportion
Investment Advisor
3.48%
Individual Investor
3.38%
Hedge Fund
3.10%
Corporation
0.52%
Research Firm
0.14%
Investment Advisor/Hedge Fund
0.07%
Other
89.30%

Institutional Shareholding

Updated: Wed, Apr 1
Updated: Wed, Apr 1
Reporting Period
No. of institutions
Shares Held
Proportion
Change
2026Q1
67
2.14M
6.79%
+183.04K
2025Q4
63
815.08K
3.30%
-670.24K
2025Q3
59
539.33K
15.18%
-858.08K
2025Q2
66
1.25M
38.22%
-642.80K
2025Q1
68
804.53K
32.52%
-1.10M
2024Q4
67
1.69M
77.15%
+250.78K
2024Q3
72
1.78M
83.42%
+447.50K
2024Q2
86
1.49M
74.57%
+1.15M
2024Q1
114
291.84K
21.12%
+12.53K
2023Q4
122
330.03K
23.89%
+44.31K
View more

Shareholder Activity

Name
Shares Held
Proportion
Change
Chg %
Date
Bristol Capital Advisors, LLC
884.52K
2.8%
+660.00K
+293.95%
Feb 23, 2026
Marzilli (Robert A)
700.00K
2.22%
+500.00K
+250.00%
Feb 23, 2026
Breen (Michael Martin)
243.54K
0.77%
+198.33K
+438.73%
Feb 23, 2026
Five Narrow Lane LP
131.82K
0.42%
-92.58K
-41.26%
Feb 23, 2026
Citadel Advisors LLC
80.76K
0.26%
+41.13K
+103.77%
Dec 31, 2025
Casamento (Charles J)
62.50K
0.2%
+62.50K
--
Feb 23, 2026
Scientech Research LLC
54.74K
0.17%
+54.74K
--
Dec 31, 2025
Urban (Alan Louis)
50.00K
0.16%
+50.00K
--
Feb 23, 2026
View more

Related ETFs

Updated: Sat, Dec 6
Updated: Sat, Dec 6
Name
Proportion
DFA Dimensional US Sustainability Core 1 ETF
0%
DFA Dimensional US Sustainability Core 1 ETF
Proportion0%

Dividend

A total of 0.00 USD has been distributed in dividends over the past 5 years.
Date
Dividend
Record Date
Payment Date
Ex-dividend Date
No Data

Stock Splits

Date
Ex-dividend Date
Type
Ratio
Feb 01, 2024
Merger
30→1
Feb 01, 2024
Merger
30→1
Feb 01, 2024
Merger
30→1
Feb 01, 2024
Merger
30→1
Date
Ex-dividend Date
Type
Ratio
Feb 01, 2024
Merger
30→1
Feb 01, 2024
Merger
30→1
Feb 01, 2024
Merger
30→1
Feb 01, 2024
Merger
30→1
KeyAI