PTGX

Healthcare

Protagonist Therapeutics, Inc.

$91.14-4.28 (-4.49%)

Prev Close

$95.42

Open

$96.91

High

$98.30

Low

$91.04

Volume

653.9K

Market Cap

$6.15B

P/E

—

Div Yield

—

Over the past 12 months, insider activity at Protagonist Therapeutics, Inc. (PTGX) has been exclusively selling, with 0 insider purchases totaling $0.00 and 9 insider sales totaling $18.78M. The most recent insider transaction was by Williams Lewis T (director), who sold $1.48M worth of shares on Feb 18, 2026. Protagonist Therapeutics, Inc. operates in the Healthcare sector, within the Biotechnology industry, with a market cap of $6.15B.

Buys (12M)

$0.00

Sells (12M)

$18.78M

Net Activity

Net Seller

$18.78M

Active Insiders

last 12 mo

PTGX Price Chart

PTGX Insider Trading Activity

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Feb 18, 2026↗	Williams Lewis T	director	Sell	18,000	$82.42	$1.48M	7,825
Feb 17, 2026↗	Williams Lewis T	Director	Sell	18,000	$82.42	$1.48M	0
Feb 6, 2026↗	Waddill William D.	director	Sell	20,000	$83.68	$1.67M	7,825
Jan 27, 2026↗	Ali Asif	officer: Chief Financial Officer	Sell	46,203	$83.13	$3.84M	78,523
Jan 27, 2026↗	MOLINA ARTURO MD	officer: Chief Medical Officer	Sell	23,151	$82.30	$1.91M	84,115
Jan 27, 2026↗	PATEL DINESH V PH D	director, officer: President and CEO	Sell	48,273	$84.18	$4.06M	574,505
Jan 21, 2026↗	Ali Asif	officer: Chief Financial Officer	Sell	8,588	$82.48	$708.3K	78,077
Jan 21, 2026↗	MOLINA ARTURO MD	officer: Chief Medical Officer	Sell	9,514	$82.48	$784.7K	97,266
Jan 21, 2026↗	PATEL DINESH V PH D	director, officer: President and CEO	Sell	34,438	$82.48	$2.84M	580,505

PTGX Insider Buying Activity

The following table shows recent insider purchases of Protagonist Therapeutics, Inc. (PTGX) stock reported via SEC Form 4 filings.

No insider buying activity found for PTGX in the last 12 months.

PTGX Insider Selling Activity

The following table shows recent insider sales of Protagonist Therapeutics, Inc. (PTGX) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
Feb 18, 2026↗	Williams Lewis T	director	Sell	18,000	$82.42	$1.48M	7,825
Feb 17, 2026↗	Williams Lewis T	Director	Sell	18,000	$82.42	$1.48M	0
Feb 6, 2026↗	Waddill William D.	director	Sell	20,000	$83.68	$1.67M	7,825
Jan 27, 2026↗	Ali Asif	officer: Chief Financial Officer	Sell	46,203	$83.13	$3.84M	78,523
Jan 27, 2026↗	MOLINA ARTURO MD	officer: Chief Medical Officer	Sell	23,151	$82.30	$1.91M	84,115
Jan 27, 2026↗	PATEL DINESH V PH D	director, officer: President and CEO	Sell	48,273	$84.18	$4.06M	574,505
Jan 21, 2026↗	Ali Asif	officer: Chief Financial Officer	Sell	8,588	$82.48	$708.3K	78,077
Jan 21, 2026↗	MOLINA ARTURO MD	officer: Chief Medical Officer	Sell	9,514	$82.48	$784.7K	97,266
Jan 21, 2026↗	PATEL DINESH V PH D	director, officer: President and CEO	Sell	34,438	$82.48	$2.84M	580,505