NASDAQ:GOSS

Gossamer Bio Stock Insider Trading

Healthcare > Biotechnology

Buy GOSS

*Your capital is at risk

$0.188

-0.0119 (-5.94%)

At Close: Jun 03, 2026

Gossamer Bio Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be negative at -61.64. In total, the insiders bought 20.89M and sold 16.59M GOSS shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	-61.64
● Buy	20.89M shares
● Sell	16.59M shares
60% Buy Activity Moderate Positive Correlation
Sell Signal High Confidence Mar 19, 2026 Analysis Breakdown: Strongly supported by a very low Insider Power Score of -61.64. Partially supported by a positive historical correlation. Confidence increased due to high data reliability score of 100.

Historical Insider Trades

Date	Type	Person	Role	Amount
Mar 19, 2026 Sell	Stock Option (Right to Buy) D-Return	Hasnain Faheem President & CEO	CEO / President	544 500 Value: $658.8K
Mar 19, 2026 Sell	Stock Option (Right to Buy) D-Return	Hasnain Faheem President & CEO	CEO / President	325 000 Value: $3.18M
Mar 19, 2026 Sell	Stock Option (Right to Buy) D-Return	Hasnain Faheem President & CEO	CEO / President	1 312 500 Value: $1.27M
Mar 19, 2026 Sell	Stock Option (Right to Buy) D-Return	Hasnain Faheem President & CEO	CEO / President	1 540 000 Value: $1.74M
Mar 19, 2026 Sell	Stock Option (Right to Buy) D-Return	Hasnain Faheem President & CEO	CEO / President	1 680 000 Value: $4.84M
Mar 19, 2026 Buy	Stock Option (Right to Buy) A-Award	Giraudo Bryan COO/cfo	C-Suite Officer	181 250 Value: $81.6K
Mar 19, 2026 Buy	Stock Option (Right to Buy) A-Award	Giraudo Bryan COO/cfo	C-Suite Officer	176 667 Value: $79.5K
Mar 19, 2026 Buy	Stock Option (Right to Buy) A-Award	Giraudo Bryan COO/cfo	C-Suite Officer	100 000 Value: $45.0K
Mar 19, 2026 Buy	Stock Option (Right to Buy) A-Award	Giraudo Bryan COO/cfo	C-Suite Officer	96 667 Value: $43.5K
Mar 19, 2026 Buy	Stock Option (Right to Buy) A-Award	Giraudo Bryan COO/cfo	C-Suite Officer	60 000 Value: $27.0K
Mar 19, 2026 Buy	Stock Option (Right to Buy) A-Award	Giraudo Bryan COO/cfo	C-Suite Officer	47 667 Value: $21.5K
Mar 19, 2026 Sell	Stock Option (Right to Buy) D-Return	Giraudo Bryan COO/cfo	C-Suite Officer	211 500 Value: $456.8K
Mar 19, 2026 Buy	Stock Option (Right to Buy) A-Award	Christian Waage EVP, Tech Ops And Admin	Officer	440 000 Value: $198.0K
Mar 19, 2026 Buy	Stock Option (Right to Buy) A-Award	Christian Waage EVP, Tech Ops And Admin	Officer	375 000 Value: $168.8K
Mar 19, 2026 Buy	Stock Option (Right to Buy) A-Award	Christian Waage EVP, Tech Ops And Admin	Officer	157 500 Value: $70.9K
Mar 19, 2026 Buy	Stock Option (Right to Buy) A-Award	Christian Waage EVP, Tech Ops And Admin	Officer	126 667 Value: $57.0K
Mar 19, 2026 Buy	Stock Option (Right to Buy) A-Award	Christian Waage EVP, Tech Ops And Admin	Officer	70 000 Value: $31.5K
Jan 02, 2026 Buy	Stock Option (Right to Buy) A-Award	Peterson Caryn EVP, Regulatory Affairs	Officer	506 250 Value: $1.46M
Jan 02, 2026 Buy	Common Stock A-Award	Aranda Richard Chief Medical Officer	Officer	93 750 Value: $270.0K
Jan 02, 2026 Buy	Stock Option (Right to Buy) A-Award	Aranda Richard Chief Medical Officer	Officer	562 500 Value: $1.62M
Jan 02, 2026 Buy	Stock Option (Right to Buy) A-Award	Hasnain Faheem President & CEO	CEO / President	1 680 000 Value: $4.84M
Jan 02, 2026 Buy	Common Stock A-Award	Hasnain Faheem President & CEO	CEO / President	280 000 Value: $806.4K
Jan 02, 2026 Buy	Stock Option (Right to Buy) A-Award	Giraudo Bryan COO/cfo	C-Suite Officer	693 750 Value: $2.00M
Jan 02, 2026 Buy	Common Stock A-Award	Giraudo Bryan COO/cfo	C-Suite Officer	115 750 Value: $333.4K
Jan 02, 2026 Buy	Stock Option (Right to Buy) A-Award	Smith Robert Paul Jr Chief Commercial Officer	Officer	562 500 Value: $1.62M

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT GOSSAMER BIO INC.

Gossamer Bio, Inc., a clinical-stage biopharmaceutical company, focuses on discovering, acquiring, developing, and commercializing therapeutics in the disease areas of immunology, inflammation, and oncology in the United States. The company is developing GB002, an inhaled, small molecule, platelet-derived growth factor receptor, or PDGFR, colonystimulating factor 1 receptor, or CSF1R, and c-KIT inhibitor for the treatment of pulmonary arterial hy...

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