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GT Biopharma, Inc.

GTBP Net selling
CIK 0000109657 #5196 in the set updated 17 Sep 2026
Bought (120 mo)
$76.30K
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$244.24K
$0.00 on a plan · $0.00 straight out of an exercise
Sold at will
$244.24K
20 of 20 sales
Net
−$167.95K
−$167.95K against sales at will

By person

7 insiders · 27 transactions
0.6×

Michael Breen holds only 0.6 times base salary in stock. $428.11K of shares against $641.02K in salary for 2025.

Salary from the company's own proxy. The shares are what Michael Breen last reported holding, valued at $0.50, the price Common Stock was last bought or sold at on the open market here, on 11 Apr 2023.

Insider
Role
Bought
Sold
Net
Holding
Worth
Change
Weldon Steven W
Former Officer and Director
$239.03K (17)
−$239.03K
3,720,000
$1.86M
Wendel Bruce
Director
$26.30K (3)
+$26.30K
352,655
$176.33K
Breen Michael Martin
CEO and Director
$25.00K (1)
+$25.00K
856,218
$428.11K
Ohri Manu
CFO & Secretary
$25.00K (1)
+$25.00K
300,000
$150.00K
Cataldo Tony
CEO
$5.03K (2)
−$5.03K
6,500,000
$3.25M
+140.3%
Urbanski Raymond W.
CEO
$176.98 (1)
−$176.98
1,351,918
$675.96K
−11.6%
Berk Gregory
Pres. of R&D, CMO
278,058
$139.03K

No percentages here. This company's share count has moved by a factor of 20.2 over the window, from 2,234,328 to 45,109,497 shares. A split, a merger or a large issue changes what the company is, and a holding measured at one point in that run is not a fraction of it at another.

Insider
Date
Role
Action
Shares
Price
Amount
Breen Michael Martin
11 Apr 2023
Executive Chairman/Interim CEO
Buy
50,000
$0.50
$25.00K
Ohri Manu
6 Apr 2023
CFO & Secretary
Buy indirect
50,000
$0.50
$25.00K
Wendel Bruce
22 Dec 2020
Director
Buy
441
$8.73
$3.85K
Wendel Bruce
22 Dec 2020
Director
Buy
1,374
$8.87
$12.19K
Wendel Bruce
16 Nov 2020
Director
Buy
3,268
$3.14
$10.26K

What was left out

Form 4 filings counted 37
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 0
Sales at will 20
Transactions with no price 0
Shares from compensation/vesting 24,828,343
Sales filed before the plan box existed 20
History held since 1 Dec 2017