$GTBP

$5.51 -$0.07 (1.25%) Close

$GTBP Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 2.1M shares outstanding

Who owns GTBP?

By type of holder

Institutions 100.0% Everyone else 0.0%

No insider has reported a holding in the last two years, so insiders are counted in "Everyone else".

Concentration Top 10 holders own 70.6%

Vanguard Capital Management LLC 18.3% · Geode Capital Management, LLC 13.0%

Institutional ownership

100.0%

+21.7 pts vs last qtr

Institutional holders

+17 vs last qtr

Net shares bought

+488.0K

by institutions in Q2 2026

New / sold out

22 / 5

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

HRT Financial LP NEW +107.1K
Everhart Financial Group, Inc. NEW +100.0K

Biggest sellers in Q2 2026

Vanguard Capital Management LLC −75.5K
Citadel Advisors LLC SOLD OUT −66.2K

Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for GT Biopharma Inc in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2022–FY2025

+419.0%

+73.14% a year

Each share's claim on the business

−80.7%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $8.36M

over 4 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years0% 1–3 years17% Under 1 year83%

Quarterly turnover

33.3%

of institutional shares changed hands

Top 10 managers, median time held

0 quarters

Super Investors

Investment managers reporting GTBP on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
VC Vanguard Capital Management LLC	376.4K	18.27%	−75.5K (−16.7%)	Q1 '26	0.0%
Shares held by quarter Peak holding451.9K (Q1'26) Change over 8 quarters+376.4K Share of the company18.270% Vanguard Capital Management LLC's full portfolio →
GC Geode Capital Management, LLC	266.8K	12.95%	−27.7K (−9.4%)	2024	0.0%
Shares held by quarter Peak holding294.5K (Q1'26) Change over 8 quarters+251.7K Share of the company12.950% Geode Capital Management, LLC's full portfolio →

Vanguard Capital Management LLC

376.4K

% of company

18.27%

Change vs last qtr

−75.5K (−16.7%)

Held since

Q1 '26

Geode Capital Management, LLC

266.8K

% of company

12.95%

Change vs last qtr

−27.7K (−9.4%)

Held since

2024

28 more super investors behind a free account

See every manager holding GT Biopharma Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting GTBP on Form N-PORT; together they hold 29.5% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VE Vanguard Extended Market Index Fund Vanguard Index Funds	$184K	376.4K	18.27%	0.00%	June 30, 2026
FE Fidelity Extended Market Index Fund Fidelity Concord Street Trust	$47.8K	167.1K	8.11%	0.00%	August 31, 2026

Vanguard Extended Market Index Fund

Vanguard Index Funds

Position value

$184K

% of company

18.27%

% of the fund

0.00%

As of

June 30, 2026

Fidelity Extended Market Index Fund

Fidelity Concord Street Trust

Position value

$47.8K

% of company

8.11%

% of the fund

0.00%

As of

August 31, 2026

2 more funds behind a free account

See every fund holding GT Biopharma Inc and how much of the fund the position is.

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