13F

Stock

GT Biopharma, Inc.

GTBP · held by 38 managers

Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025

Reported value

$339.8K

Holders

38

+1 new · −1 exited

Holders’ est. mark

$2.79K

Price effect on 3 books still in the name

Largest holder

$63.4K

Citadel

Notable conviction

Share of each notable manager’s 13F book.

Holder count by quarter

Q4 2023Q2 2025Q3 2025Q4 2025Q1 2026

Who holds it

Notable only
InvestorSharesValueEst. markChange
Citadel80.8K$63.4K—Held
Scientech Research LLC54.7K$43K—Held
SeaCrest Wealth Management, LLC50K$36.6K—Held
JANE STREET GROUP, LLC26K$20.4K—Held
Integrated Wealth Concepts LLC20K$15.7K—Held
GEODE CAPITAL MANAGEMENT, LLC19.3K$15.1K—Held
MORGAN STANLEY18.6K$14.6K$2.78KAdded$6.38K
Caitlin John, LLC16.5K$13K—Held
WELLS FARGO & COMPANY/MN16K$12.6K—Held
Cerity Partners LLC15K$11.8K—Held
Verdence Capital Advisors LLC13K$10.2K—Held
TWO SIGMA SECURITIES, LLC12.5K$9.84K—Held
Prospera Financial Services Inc12K$9.42K—Held
PARSONS CAPITAL MANAGEMENT INC/RI10.9K$8.56K—Held
BANK OF MONTREAL /CAN/10.8K$8.51K—Held
LPL Financial LLC10.6K$8.35K—Held
Advisory Services Network, LLC10K$7.85K—Held
BlackRock, Inc.8.41K$6.6K—Held
HBK Sorce Advisory LLC10K$5.39K—Held
WOLFF WIESE MAGANA LLC5K$3.93K—Held
Newbridge Financial Services Group, Inc.3.75K$2.94K—Held
Farther Finance Advisors, LLC3K$2.36K—Held
CITIGROUP INC2.78K$2.18K—Held
OSAIC HOLDINGS, INC.2K$1.58K—Held
CIBC Private Wealth Group LLC2K$1.57K—Held
Tower Research Capital LLC (TRC)1.7K$1.34K—Held
Triumph Capital Management1.66K$1.3K—New
SWAN Capital LLC1K$785—Held
Spire Wealth Management994$785—Held
BANK OF AMERICA CORP /DE/24$19$5Added$5
BNP PARIBAS FINANCIAL MARKETS16$13—Held
Coston, McIsaac & Partners17.1K$13—Held
AM INVESTMENT STRATEGIES LLC15K$12—Held
HRT FINANCIAL LP11.8K$9—Held
JPMORGAN CHASE & CO1$1—Held
UBS Group AG1$1—Held
SBI Securities Co., Ltd.1$1—Held
Allworth Financial LP1$1$0Held

Who left

Positions as of Q4 2025. 13F filings arrive up to 45 days after quarter-end and omit shorts. Values are quarter-end marks, as filed. Estimated mark is the price effect on shares still held — not realized P&L or investment advice.