Stocks · Health care · Pharmaceutical Preparations

Gossamer Bio, Inc.

GOSS Clue Score23
United States Fiscal year ends December CIK 0001728117
$9.31 -5.77% Close, 9 Oct 2026

Price, with every insider trade on it

Closing prices, 12 months · point at a dot for who traded, or at the line for the close
9.31 on 9 Oct 2026
12 6 0 Oct 2025 Apr 2026 Oct 2026 13 Oct 2025 $2.44 14 Oct 2025 $2.38 15 Oct 2025 $2.41 16 Oct 2025 $2.31 17 Oct 2025 $2.19 20 Oct 2025 $2.27 21 Oct 2025 $2.18 22 Oct 2025 $2.21 23 Oct 2025 $2.09 24 Oct 2025 $2.48 27 Oct 2025 $2.39 28 Oct 2025 $2.38 29 Oct 2025 $2.39 30 Oct 2025 $2.42 31 Oct 2025 $2.45 3 Nov 2025 $2.39 4 Nov 2025 $2.30 5 Nov 2025 $2.37 6 Nov 2025 $2.31 7 Nov 2025 $2.36 10 Nov 2025 $2.48 11 Nov 2025 $2.59 12 Nov 2025 $2.70 13 Nov 2025 $2.51 14 Nov 2025 $2.71 17 Nov 2025 $2.99 18 Nov 2025 $3.05 19 Nov 2025 $3.14 20 Nov 2025 $3.11 21 Nov 2025 $3.06 24 Nov 2025 $3.18 25 Nov 2025 $3.27 26 Nov 2025 $3.34 28 Nov 2025 $3.34 1 Dec 2025 $3.14 2 Dec 2025 $2.99 3 Dec 2025 $3.42 4 Dec 2025 $3.32 5 Dec 2025 $3.33 8 Dec 2025 $3.41 9 Dec 2025 $3.45 10 Dec 2025 $3.49 11 Dec 2025 $3.62 12 Dec 2025 $3.60 15 Dec 2025 $3.79 16 Dec 2025 $3.56 17 Dec 2025 $3.57 18 Dec 2025 $3.43 19 Dec 2025 $3.44 22 Dec 2025 $3.77 23 Dec 2025 $3.29 24 Dec 2025 $3.44 26 Dec 2025 $3.23 29 Dec 2025 $3.21 30 Dec 2025 $3.12 31 Dec 2025 $3.10 2 Jan 2026 $2.88 5 Jan 2026 $2.74 6 Jan 2026 $2.56 7 Jan 2026 $2.41 8 Jan 2026 $2.50 9 Jan 2026 $2.50 12 Jan 2026 $2.52 13 Jan 2026 $2.66 14 Jan 2026 $2.55 15 Jan 2026 $2.45 16 Jan 2026 $2.52 20 Jan 2026 $2.60 21 Jan 2026 $2.74 22 Jan 2026 $2.87 23 Jan 2026 $2.70 26 Jan 2026 $2.66 27 Jan 2026 $2.64 28 Jan 2026 $2.55 29 Jan 2026 $2.42 30 Jan 2026 $2.28 2 Feb 2026 $2.48 3 Feb 2026 $2.67 4 Feb 2026 $2.46 5 Feb 2026 $2.44 6 Feb 2026 $2.26 9 Feb 2026 $2.26 10 Feb 2026 $2.33 11 Feb 2026 $2.35 12 Feb 2026 $2.32 13 Feb 2026 $2.29 17 Feb 2026 $2.15 18 Feb 2026 $2.17 19 Feb 2026 $2.11 20 Feb 2026 $2.13 23 Feb 2026 $0.42 24 Feb 2026 $0.42 25 Feb 2026 $0.38 26 Feb 2026 $0.40 27 Feb 2026 $0.42 2 Mar 2026 $0.43 3 Mar 2026 $0.47 4 Mar 2026 $0.58 5 Mar 2026 $0.52 6 Mar 2026 $0.50 9 Mar 2026 $0.56 10 Mar 2026 $0.51 11 Mar 2026 $0.49 12 Mar 2026 $0.46 13 Mar 2026 $0.44 16 Mar 2026 $0.46 17 Mar 2026 $0.47 18 Mar 2026 $0.43 19 Mar 2026 $0.45 20 Mar 2026 $0.42 23 Mar 2026 $0.37 24 Mar 2026 $0.34 25 Mar 2026 $0.38 26 Mar 2026 $0.37 27 Mar 2026 $0.35 30 Mar 2026 $0.32 31 Mar 2026 $0.33 1 Apr 2026 $0.37 2 Apr 2026 $0.37 6 Apr 2026 $0.35 7 Apr 2026 $0.33 8 Apr 2026 $0.35 9 Apr 2026 $0.37 10 Apr 2026 $0.41 13 Apr 2026 $0.40 14 Apr 2026 $0.43 15 Apr 2026 $0.45 16 Apr 2026 $0.44 17 Apr 2026 $0.45 20 Apr 2026 $0.42 21 Apr 2026 $0.38 22 Apr 2026 $0.39 23 Apr 2026 $0.37 24 Apr 2026 $0.36 27 Apr 2026 $0.35 28 Apr 2026 $0.34 29 Apr 2026 $0.35 30 Apr 2026 $0.37 1 May 2026 $0.37 4 May 2026 $0.35 5 May 2026 $0.34 6 May 2026 $0.35 7 May 2026 $0.34 8 May 2026 $0.33 11 May 2026 $0.34 12 May 2026 $0.34 13 May 2026 $0.34 14 May 2026 $0.33 15 May 2026 $0.34 18 May 2026 $0.19 19 May 2026 $0.20 20 May 2026 $0.22 21 May 2026 $0.20 22 May 2026 $0.21 26 May 2026 $0.22 27 May 2026 $0.22 28 May 2026 $0.21 29 May 2026 $0.23 1 Jun 2026 $0.20 2 Jun 2026 $0.20 3 Jun 2026 $0.19 4 Jun 2026 $0.18 5 Jun 2026 $0.18 8 Jun 2026 $0.17 9 Jun 2026 $0.16 10 Jun 2026 $0.16 11 Jun 2026 $0.18 12 Jun 2026 $0.16 15 Jun 2026 $0.17 16 Jun 2026 $0.17 17 Jun 2026 $0.18 18 Jun 2026 $0.17 22 Jun 2026 $0.16 23 Jun 2026 $0.17 24 Jun 2026 $0.17 25 Jun 2026 $0.17 26 Jun 2026 $0.16 29 Jun 2026 $0.16 30 Jun 2026 $0.16 1 Jul 2026 $0.17 2 Jul 2026 $0.17 6 Jul 2026 $0.19 7 Jul 2026 $0.18 8 Jul 2026 $0.17 9 Jul 2026 $0.18 10 Jul 2026 $0.17 13 Jul 2026 $0.14 14 Jul 2026 $0.14 15 Jul 2026 $0.16 16 Jul 2026 $0.17 17 Jul 2026 $0.17 20 Jul 2026 $0.14 21 Jul 2026 $0.15 22 Jul 2026 $0.14 23 Jul 2026 $0.14 24 Jul 2026 $0.14 27 Jul 2026 $0.20 28 Jul 2026 $0.21 29 Jul 2026 $0.21 30 Jul 2026 $0.18 31 Jul 2026 $0.17 3 Aug 2026 $0.17 4 Aug 2026 $0.18 5 Aug 2026 $0.18 6 Aug 2026 $0.18 7 Aug 2026 $0.18 10 Aug 2026 $0.18 11 Aug 2026 $0.18 12 Aug 2026 $0.18 13 Aug 2026 $0.17 14 Aug 2026 $0.15 17 Aug 2026 $0.14 18 Aug 2026 $0.14 19 Aug 2026 $0.16 20 Aug 2026 $0.16 21 Aug 2026 $0.15 24 Aug 2026 $0.18 25 Aug 2026 $0.20 26 Aug 2026 $0.17 27 Aug 2026 $0.17 28 Aug 2026 $0.17 31 Aug 2026 $0.17 1 Sep 2026 $0.17 2 Sep 2026 $0.17 3 Sep 2026 $0.18 4 Sep 2026 $0.18 8 Sep 2026 $0.18 9 Sep 2026 $0.16 10 Sep 2026 $0.14 11 Sep 2026 $10.73 14 Sep 2026 $10.70 15 Sep 2026 $10.38 16 Sep 2026 $10.96 17 Sep 2026 $11.94 18 Sep 2026 $10.73 21 Sep 2026 $11.28 22 Sep 2026 $11.69 23 Sep 2026 $10.99 24 Sep 2026 $10.93 25 Sep 2026 $10.94 28 Sep 2026 $11.52 29 Sep 2026 $11.58 30 Sep 2026 $11.85 1 Oct 2026 $10.93 2 Oct 2026 $10.71 5 Oct 2026 $10.65 6 Oct 2026 $10.78 7 Oct 2026 $10.18 8 Oct 2026 $9.88 9 Oct 2026 $9.31
0 buys0 sales at will0 planned sales

Key numbers

Fiscal year 2025, ended 31 Dec 2025, as filed
Revenue
$48.47M
Net income
$170.37M
Free cash flow
$171.35M
Operating margin
-352.2%
Net margin
-351.5%
Revenue growth, 1 yr
-57.7%

Revenue and profit

Fiscal years, as filed with the SEC · point at a year for the detail
Full statements →
0K -243M FY20 Fiscal year 2020 Revenue $0.00 Net income $243.36M Margin n/a 0K -234M FY21 Fiscal year 2021 Revenue $0.00 Net income $234.00M Margin n/a 0K -229M FY22 Fiscal year 2022 Revenue $0.00 Net income $229.38M Margin n/a 0K -180M FY23 Fiscal year 2023 Revenue $0.00 Net income $179.82M Margin n/a 115M -57M FY24 Fiscal year 2024 Revenue $114.70M Net income $56.53M Margin -49.3% 48M -170M FY25 Fiscal year 2025 Revenue $48.47M Net income $170.37M Margin -351.5% · growth -57.7%
RevenueNet incomeLoss

Latest insider transactions

From Form 4, most recent first
All of them →
DateInsiderTypeValueOf own stake
19 Aug 2025 Milligan Sandra
Director
Bought $50.02K 81.4%
24 Jun 2024 Aranda Richard
Chief Medical Officer
Sold at will $1.26K 1.0%
21 Jun 2024 Hasnain Faheem
President & CEO
Bought $250.28K 7.4%
18 Jun 2024 Giraudo Bryan
COO/CFO
Bought $59.11K 26.3%
17 Jun 2024 Smith Robert Paul JR
Chief Commercial Officer
Bought $15.05K opened
27 Mar 2024 Hasnain Faheem
President & CEO
Sold at will $26.77K 16.2%