// company-profile
GT Biopharma, Inc.
GTBPExchangeNasdaqSectorPharmaceutical PreparationsInc.DEFilings11Insiders6
// api This GT Biopharma, Inc. insider-trading data is served live by the Form4API insider trading API. Get the same data via API.
// activity-summary
No insider transactions in the last 30 days.
No insider activity recorded for GTBP in the last 90 days.
Institutional Ownership
Top 13F-HR holders of GT Biopharma, Inc. as of 2026-03-31
Total reported AUM
$538,391
QoQ change
+61.6%
Reporting period
2026-03-31
#1
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
$184,365
452K shares
#2
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
$106,626
261K shares
#3
Arax Advisory Partners
CIK 1586767
$38,210
94K shares
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 4, 2025 | Breen Michael Martin | GTBP | Award | 100,000 | $0.00 | $0K |
| Sep 4, 2025 | CASAMENTO CHARLES J | GTBP | Award | 62,500 | $0.00 | $0K |
| Sep 4, 2025 | Breen Michael Martin | GTBP | Award | 100,000 | $0.00 | $0K |
| Sep 4, 2025 | Breen Michael Martin | GTBP | Award | 100,000 | $0.00 | $0K |
| Sep 4, 2025 | Kramer Hilary | GTBP | Award | 31,250 | $0.00 | $0K |
11 more transactions hidden
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