Bryan Giraudo

PTGX

Bryan Giraudo serves as director at Protagonist Therapeutics, Inc. (PTGX). This page tracks their complete SEC Form 4 insider trading history including stock purchases and sales.

Total Buys

5 trades

$376.5K

Total Sells

4 trades

$6.07M

Net Position

Net Seller

$5.70M

Companies Traded

PTGX, GOSS

Active Period

Mar 2021 – May 2026

9 total trades

Most Recent

Sell PTGX

May 11, 2026 · $5.92M

Bryan Giraudo's Insider Trading at Protagonist Therapeutics, Inc. (PTGX)

Buys

0 · $0.00

Sells

1 · $5.92M

Total Shares Bought

Total Shares Sold

59,130

PTGX Price Chart

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Date	Type	Shares	Avg Price	Value	Shares After
May 11, 2026	Sell	59,130	$100.10	$5.92M	27,825

Bryan Giraudo's Insider Trading at Gossamer Bio, Inc. (GOSS)

Buys

5 · $376.5K

Sells

3 · $155.1K

Total Shares Bought

418,869

Total Shares Sold

22,642

GOSS Price Chart

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Date	Type	Shares	Avg Price	Value	Shares After
Jun 20, 2024	Buy	100,000	$0.59	$59.1K	480,010
Mar 28, 2024	Sell	6,430	$1.16	$7.4K	92,737
Nov 14, 2023	Buy	200,000	$0.56	$112.9K	380,010
Apr 5, 2023	Buy	55,000	$1.02	$56.1K	125,990
Mar 22, 2023	Buy	50,000	$0.97	$48.4K	70,990
Jul 15, 2022	Buy	13,869	$7.21	$100.0K	20,990
Mar 24, 2022	Sell	10,722	$8.91	$95.6K	99,167
Mar 25, 2021	Sell	5,490	$9.48	$52.0K	109,889