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Gossamer Bio, Inc.

GOSS Net selling
CIK 0001728117 #4496 in the set updated 22 Sep 2026
Bought (120 mo)
$4.55M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$11.40M
$0.00 on a plan · $631.54K straight out of an exercise
Sold at will
$10.77M
38 of 40 sales
Net
−$6.85M
−$6.22M against sales at will

By person

16 insiders · 68 transactions
28.7×

Faheem Hasnain holds 28.7 times base salary in stock. $18.67M of shares against $649.65K in salary for 2025.

Salary from the company's own proxy. The shares are what Faheem Hasnain last reported holding, valued at $1.92, the price Common Stock was last bought or sold at on the open market here, on 19 Aug 2025.

Insider
Role
Bought
Sold
Net
Holding
Worth
Change
Omega Fund V, L.P. entity
10% owner
$8.68M (8)
−$8.68M
13,506,832
$25.93M
+94.2%
Hasnain Faheem
President & CEO
$3.42M (7)
$196.47K (2)
+$3.22M
9,724,495
$18.67M
+43.2%
Salter-Cid Luisa
Chief Scientific Officer
$1.05M (3)
−$1.05M
206,065
$395.64K
+18.4%
Dupont Jakob
Chief Medical Officer
$631.54K (2) scheduled
−$631.54K
46,500
$89.28K
Giraudo Bryan
COO/CFO
$565.98K (10)
$155.06K (3)
+$410.92K
876,868
$1.68M
+12,214%
Aranda Richard
Chief Medical Officer
$168.00K (8)
−$168.00K
463,106
$889.16K
+108.3%
Gujrathi Sheila
President & CEO
$167.98K (1)
+$167.98K
4,237,742
$8.14M
+6.6%
Carter Laura
Chief Scientific Officer
$49.99K (1)
$217.75K (6)
−$167.75K
76,263
$146.42K
+23.3%
Peterson Caryn
Chief Development Officer
$152.18K (5)
−$152.18K
259,333
$497.92K
+305.2%
Cox Russell J.
Director
$115.20K (1)
+$115.20K
7,200
$13.82K
Milligan Sandra
Director
$75.23K (2)
+$75.23K
90,050
$172.90K
+181.4%
Christian Waage
EVP, Tech Ops and Admin
$137.41K (5)
$155.07K (3)
−$17.66K
889,129
$1.71M
+57.8%
Smith Robert Paul JR
Chief Commercial Officer
$15.05K (1)
+$15.05K
285,898
$548.92K
+6,051%
Burow Kristina
Director
4,027,958
$7.73M
ARCH Venture Partners IX, LLC entity
10% owner
4,027,958
$7.73M
Daniel Thomas O
Director
38,095
$73.14K

No percentages here. This company's share count has moved by a factor of 2.2 over the window, from 226,604,137 to 488,846,722 shares. A split, a merger or a large issue changes what the company is, and a holding measured at one point in that run is not a fraction of it at another.

Nothing of that kind in this period.

What was left out

Form 4 filings counted 198
Amendments (4/A) skipped 1
Filings about a different issuer 0
Unreadable filings 0
Joint filings 6
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 2
Sales at will 38
Transactions with no price 0
Shares from compensation/vesting 26,579,639
Sales filed before the plan box existed 28
History held since 12 Feb 2019