Steven W Weldon

Insider

First SEC filing: Feb. 12, 2016 · Latest: Feb. 12, 2016

On this page

Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Initial holdings The stakes this person held when they first started reporting.

Insider at

GTBP selling Dec. 22, 2020

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 2 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

2 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Dec. 22, 2020	GTBP	S 10b5-1	47,978	$0.40	$19,191	3,720,000 Direct	-1.27%	Disposed	-99.9% (price as of 2026-08-20)
Dec. 21, 2020	GTBP	S 10b5-1	50,000	$0.30	$15,000	3,853,700 Direct	-1.28%	Disposed	-99.8% (price as of 2026-08-20)
Dec. 21, 2020	GTBP	S 10b5-1	50,000	$0.33	$16,500	3,803,700 Direct	-1.30%	Disposed	-99.8% (price as of 2026-08-20)
Dec. 21, 2020	GTBP	S 10b5-1	35,722	$0.34	$12,145	3,767,978 Direct	-0.94%	Disposed	-99.8% (price as of 2026-08-20)
Dec. 18, 2020	GTBP	S 10b5-1	50,000	$0.30	$15,000	3,903,700 Direct	-1.26%	Disposed	-99.8% (price as of 2026-08-20)
Dec. 17, 2020	GTBP	S 10b5-1	50,000	$0.30	$15,000	4,003,700 Direct	-1.23%	Disposed	-99.8% (price as of 2026-08-20)
Dec. 17, 2020	GTBP	S 10b5-1	50,000	$0.31	$15,500	3,953,700 Direct	-1.25%	Disposed	-99.8% (price as of 2026-08-20)
Dec. 16, 2020	GTBP	S 10b5-1	50,000	$0.30	$15,000	4,053,700 Direct	-1.22%	Disposed	-99.8% (price as of 2026-08-20)
Dec. 15, 2020	GTBP	S 10b5-1	50,000	$0.30	$15,000	4,203,700 Direct	-1.18%	Disposed	-99.8% (price as of 2026-08-20)
Dec. 15, 2020	GTBP	S 10b5-1	50,000	$0.30	$15,000	4,153,700 Direct	-1.19%	Disposed	-99.8% (price as of 2026-08-20)
Dec. 15, 2020	GTBP	S 10b5-1	50,000	$0.32	$16,000	4,103,700 Direct	-1.20%	Disposed	-99.8% (price as of 2026-08-20)
Dec. 14, 2020	GTBP	S 10b5-1	50,000	$0.28	$14,000	4,350,000 Direct	-1.14%	Disposed	-99.8% (price as of 2026-08-20)
Dec. 14, 2020	GTBP	S 10b5-1	50,000	$0.29	$14,500	4,300,000 Direct	-1.15%	Disposed	-99.8% (price as of 2026-08-20)
Dec. 14, 2020	GTBP	S 10b5-1	46,300	$0.29	$13,427	4,253,700 Direct	-1.08%	Disposed	-99.8% (price as of 2026-08-20)
Dec. 11, 2020	GTBP	S 10b5-1	50,000	$0.25	$12,500	4,450,000 Direct	-1.11%	Disposed	-99.8% (price as of 2026-08-20)
Dec. 11, 2020	GTBP	S 10b5-1	50,000	$0.26	$13,000	4,400,000 Direct	-1.12%	Disposed	-99.8% (price as of 2026-08-20)
May 13, 2020	GTBP	S	2,269,708	—	—	4,500,000 Direct	-33.53%	Disposed	(price as of 2026-08-20)
Aug. 14, 2019	GTBP	A	4,500,000	—	—	6,769,707 Direct	+198.26%	Acquired	(price as of 2026-08-20)
Sept. 1, 2017	GTBP	A	2,566,835	—	—	2,568,840 Direct	+128021.70%	Acquired	(price as of 2026-08-20)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Initial ownership (Form 3) 1 holding

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
Feb. 12, 2016	GTBP	Common Stock	601,610	Direct