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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
Weldon Steven W
22 Dec 2020
Former Officer and Director
Sell
47,978
$0.40
$19.19K
Weldon Steven W
21 Dec 2020
Former Officer and Director
Sell
35,722
$0.34
$12.15K
Weldon Steven W
21 Dec 2020
Former Officer and Director
Sell
50,000
$0.33
$16.50K
Weldon Steven W
21 Dec 2020
Former Officer and Director
Sell
50,000
$0.30
$15.00K
Weldon Steven W
18 Dec 2020
Former Officer and Director
Sell
50,000
$0.30
$15.00K
Weldon Steven W
17 Dec 2020
Former Officer and Director
Sell
50,000
$0.31
$15.50K
Weldon Steven W
17 Dec 2020
Former Officer and Director
Sell
50,000
$0.30
$15.00K
Weldon Steven W
16 Dec 2020
Former Officer and Director
Sell
50,000
$0.30
$15.00K
Weldon Steven W
15 Dec 2020
Former Officer and Director
Sell
50,000
$0.32
$16.00K
Weldon Steven W
15 Dec 2020
Former Officer and Director
Sell
50,000
$0.30
$15.00K
Weldon Steven W
15 Dec 2020
Former Officer and Director
Sell
50,000
$0.30
$15.00K
Weldon Steven W
14 Dec 2020
Former Officer and Director
Sell
46,300
$0.29
$13.43K
Weldon Steven W
14 Dec 2020
Former Officer and Director
Sell
50,000
$0.29
$14.50K
Weldon Steven W
14 Dec 2020
Former Officer and Director
Sell
50,000
$0.28
$14.00K
Weldon Steven W
11 Dec 2020
Former Officer and Director
Sell
50,000
$0.26
$13.00K
Weldon Steven W
11 Dec 2020
Former Officer and Director
Sell
50,000
$0.25
$12.50K
Cataldo Tony
2 Jun 2020
CEO
Sell
4,234,320
$0.00
$4.23K
Weldon Steven W
13 May 2020
CFO
Sell
2,269,708
$0.00
$2.27K
Cataldo Tony
6 Feb 2019
Director
Sell
800,000
$0.00
$800.00
Urbanski Raymond W.
1 Feb 2019
CEO
Sell
176,980
$0.00
$176.98

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