Gossamer Bio, Inc.

Gossamer Bio, Inc.

GOSS·NASDAQ

$0.23

+4.0%
HealthcareBiotechnology

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 hypertension; GB004, a gut-targeted, oral small molecule for the treatment of inflammatory bowel disease; GB5121, an oral, irreversible, covalent, small molecule inhibitor of Bruton's Tyrosine Kinase for the treatment of primary central nervous system lymphoma; and GB7208, an oral, small molecule, BTK inhibitor for the treatment of multiple sclerosis. It has license agreements with Pulmokine, Inc. to develop and commercialize GB002 and related backup compounds; and Aerpio Pharmaceuticals, Inc. to develop and commercialize GB004 and related compounds. The company was formerly known as FSG, Bio, Inc. and changed its name to Gossamer Bio, Inc. in 2017. Gossamer Bio, Inc. was incorporated in 2015 and is headquartered in San Diego, California.

At a Glance

Live Snapshot
Market Cap$54.19M
EPS-0.7500
P/E Ratio-4.16
Earnings Date08/04/2026
-148.67%
Return on Invested Capital
573%
3Y+62.0%
5Y+256.0%
10Y-249.0%
138.78%
Return on Equity
-172%
3Y-107.0%
5Y-283.0%
10Y+106.0%
-98.91%
Return on Assets
452%
3Y+17.0%
5Y+119.0%
10Y-28.0%
Gossamer Bio, Inc.

Gossamer Bio, Inc. Management Team

GOSS · NASDAQ
DR

Dr. Richard Aranda M.D.

Chief Medical Officer

Compensation

$677,492

Born 1960(Age 66)
MB

Mr. Bryan Giraudo

Chief Operating Officer & Chief Financial Officer

Compensation

$739,622

Born 1975(Age 51)
male
MF

Mr. Faheem Hasnain

Co-Founder, Chief Executive Officer, President & Chairman

Compensation

$961,995

Born 1958(Age 68)
male
MC

Ms. Caryn L. Peterson

Executive Vice President of Regulatory Affairs

Born 1959(Age 67)
female
MC

Mr. Christian Waage J.D.

Executive Vice President of Technical Operations & Administration

Compensation

$583,156

Born 1967(Age 59)
male
MJ

Mr. Jeff Boerneke

General Counsel & Secretary

male
MM

Mr. Matt Cravets

Senior Vice President of Biometrics

male
DR

Dr. Robert F. Roscigno Ph.D.

Senior Vice President of Clinical Development of Pulmonary Vascular Disease

Born 1966(Age 60)
MD

Ms. Deanna Weber

Senior Vice President of Human Resources

female
MJ

Ms. Jeanine Anthony

Senior Vice President of Marketing

female
goss

Gossamer Bio, Inc. Insider Positioning

GOSS · NASDAQ

During the last 12 months, insiders have purchased $988K worth of GOSS shares, with no selling activity reported.

3 Months

Bought

0

0.00

Sold

0

0.00

Net Activity

+0

+$0

3-6 Months

Bought

0

0.00

Sold

0

0.00

Net Activity

+0

+$0

6-9 Months

Bought

0

0.00

Sold

0

0.00

Net Activity

+0

+$0

9-12 Months

Bought

716.0K

988.42K

Sold

0

0.00

Net Activity

+988K

+$988K

Top Buyers

1
MS

Milligan Sandra

Director

141.1K shares2 transactions

$206K

2
DTO

Daniel Thomas O

Director

115.0K shares1 transactions

$156K

3
NSD

Nathan Steven D

Director

115.0K shares1 transactions

$156K

4
CRJ

Cox Russell J.

Director

115.0K shares1 transactions

$156K

5
QJD

Quisel John D

Director

115.0K shares1 transactions

$156K

Top Sellers

No selling activity

Insider Activity Analysis

Net Insider Sentiment

Bullish

Strong bullish signal with $988K net buying. Insiders are aggressively accumulating shares, suggesting significant confidence in future prospects.

Buy/Sell Ratio

∞:1

Perfect buy/sell ratio. Only buying activity with zero selling—the most bullish possible insider signal.

Insider Participation

High Buying

5 insider buyers vs. 0 sellers. Broad-based buying across management team suggests widespread confidence.

Insider Activity Insight

Compelling insider conviction: The combination of strong buy/sell ratio and multiple buyers suggests insiders see attractive risk/reward. Consider this alongside fundamental analysis for confirmation.

SEC Filings

GOSS - Filing history and reports

Filing TypeFiling DatePeriod EndingFiscal YearActions
DEF 14A

DEF 14A 2026

N/A

April 24, 2026
April 24, 2026
2026
DEF 14A

DEF 14A 2025

N/A

April 29, 2025
April 28, 2025
2025
DEF 14A

DEF 14A 2024

N/A

April 24, 2024
April 16, 2024
2024
DEF 14A

DEF 14A

N/A

April 28, 2023
April 28, 2023
 
DEF 14A

DEF 14A 2022

N/A

April 27, 2022
June 09, 2022
2022
DEF 14A

DEF 14A 2021

N/A

April 27, 2021
June 09, 2021
2021
DEF 14A

DEF 14A 2020

N/A

April 27, 2020
June 17, 2020
2020
DEF 14A

DEF 14A 2019

N/A

April 30, 2019
June 10, 2019
2019
Showing 1 to 8 of 8 filings