GT Biopharma
GTBP · NASDAQ
$7.31+$0.62 (+9.27%)TodayMarket closed ·
Prev close $6.69
Who owns GTBP
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 8.5% of GTBP’s shares.
- Marzilli (Robert A)4.8%
- Vanguard Capital Management, LLC0.8%
- Breen (Michael Martin)0.7%
- Geode Capital Management, L.L.C.0.6%
- Next 6 largest institutions1.5%
- All other shareholders91.5%
| Holder | Shares | % of shares |
|---|---|---|
| Marzilli (Robert A) | 2.13M | 4.80% |
| Vanguard Capital Management, LLC | 376.40K | 0.85% |
| Breen (Michael Martin) | 295.21K | 0.67% |
| Geode Capital Management, L.L.C. | 266.79K | 0.60% |
| Vanguard Fiduciary Trust Co | 225.94K | 0.51% |
| HRT Financial LP | 107.14K | 0.24% |
| Everhart Financial Group, Inc. | 100.00K | 0.23% |
| Arax Advisory Partners | 93.63K | 0.21% |
| Opal Wealth Advisors, LLC | 81.81K | 0.18% |
| Northern Trust Investments, Inc. | 75.46K | 0.17% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Extended Market Index Fund | 15.06K | 0.03% |
| Fidelity Extended Market Index Fund | 6.72K | 0.02% |
| Fidelity Series Total Market Index Fund | 2.48K | 0.01% |
| Fidelity Total Market Index Fund | 88 | 0.00% |
Short interest
Settled Sep 30, 2026
- Shares short
- 259.43K
- Days to cover
- 4.41
- % of shares outstanding
- 0.59%
- Average daily volume
- 58.78K
- Change since last report
- +1.1%
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