GOSS- Gossamer Bio, Inc.

Name: Gossamer Bio, Inc. Insider Trading Data
Creator: U.S. Securities and Exchange Commission
License: https://www.sec.gov/privacy#accessibility

GOSS sits in the Biotechnology industry within the Health Care sector, so this activity is best read against the sector's broader insider trend.

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Insider Ownership

Role	Insider	Shares	Value	30d
Other	Smith Robert Paul Jr	5.80M	-	-
Other	Peterson Caryn	5.80M	-	-
VP	Christian Waage	2.90M	-	-
Dir	Ciongoli Gregory Austin	30.0K	-	-
Dir	Drynan Skye	10.0K	-	-

Activity

Buys and sells only

Transactions

10 filings

Date	Insider	Role	Type	Shares	Price	Value	Chg%	3M	12M
Aug 19, 2025	Milligan Sandra	Director	Buy	26,050	$1.92	$50,016.00	+81.4%	+55.7%	-
Jun 24, 2024	Aranda Richard66	Chief Medical Officer	Sell	1,908	$0.66	$1,260.23	-1.0%	+21.1%	+67.0%
Jun 21, 2024	Hasnain Faheem74	President &CEO	Buy	372,000	$0.67	$250,281.60	+7.4%	+47.7%	+121.5%
Jun 18, 2024	Giraudo Bryan73	Coo/ CFO	Buy	100,000	$0.59	$59,110.00	+26.3%	+67.8%	+137.8%
Jun 17, 2024	Smith Robert Paul Jr	Chief Commercial Officer	Buy	25,000	$0.60	$15,050.00	New	+75.0%	+138.4%
Mar 27, 2024	Christian Waage75	EVP, Tech Ops And Admin	Sell	6,430	$1.16	$7,429.87	-1.1%	-13.7%	-0.9%
Mar 27, 2024	Giraudo Bryan73	Coo/ CFO	Sell	6,430	$1.16	$7,430.51	-6.5%	-13.7%	-0.9%
Mar 27, 2024	Hasnain Faheem74	President &CEO	Sell	23,172	$1.16	$26,772.93	-16.2%	-13.7%	-0.9%
Mar 18, 2024	Peterson Caryn63	EVP, Regulatory Affairs	Sell	4,018	$1.33	$5,342.73	-7.5%	-62.3%	+2.9%
Mar 18, 2024	Aranda Richard66	Chief Medical Officer	Sell	4,018	$1.33	$5,341.93	-2.0%	-62.3%	+2.9%

Understand these filings

How to Read SEC Form 4 Filings →Understanding Insider Buying Signals →What is Insider Trading? A Complete Guide →Cluster Buying: When Multiple Insiders Buy Together →

Insider	Role	Shares	Value	Buys	Sells

Date	Ticker	Insider	Role	Type	Shares	Price	Value	Chg%	SEC