GOSS

Gossamer Bio Inc$0.17 5.25%
Health CareUSCUSIP 38341P102· EOD Jul 16, 2026◍ Confluence graph
Tracked 13F Holders
152
+3 QoQ
13F Value (tracked)
$51.1M
Insider Net · 180d
$0
0↑ 0↓
Recent Filings
15
Smart-money sentimentBullish
BearishBullish
13F funds (latest Q)36 adding · 11 trimming
Insider net (180d)$0

Price & smart-money activity

$0.17 5.25%5Y -97.8%
$0.13$4.11$8.10$12.08$16.062021202220232024202520261614320196251722124440193234236192313222224218145162131421121113161617241841244828494262
Hover for who · click for detailEnd-of-day closing prices52w $0.14 – $3.79

Top institutional holders

152 tracked 13F filers
1 source-reported value row is withheld because the reported units do not agree with same-security peers. Share counts remain visible and unchanged.
#FundPosition valueSharesLast moveAs ofHistory
1BlackRock, Inc.
$5.5M
16.8M
−1.3%
Reduced · −230K sh
Q1 2026
2Kalehua Capital Management LLC
$3.4M
10.2M
New
+10.2M sh
Q1 2026
3AQR CAPITAL MANAGEMENT LLC
$3.3M
10.1M
+805%
Added · +9.0M sh
Q1 2026
4VANGUARD CAPITAL MANAGEMENT LLC
$3.1M
9.4M
New
+9.4M sh
Q1 2026
5ARCH Venture Management, LLC
$2.6M
8.1M
Held
Q1 2026
6Octagon Capital Advisors LP
$2.5M
7.8M
−44%
Reduced · −6.2M sh
Q1 2026
7Samsara BioCapital, LLC
$2.4M
7.2M
Held
Q1 2026
8BALYASNY ASSET MANAGEMENT L.P.
$1.9M
5.9M
+290%
Added · +4.4M sh
Q1 2026
9Siren, L.L.C.
$1.7M
5.2M
Held
Q1 2026
10683 Capital Management, LLC
$1.6M
5.0M
−3.7%
Reduced · −191K sh
Q1 2026
11HHLR ADVISORS, LTD.
$1.6M
5.0M
Held
Q1 2026
12GEODE CAPITAL MANAGEMENT, LLC
$1.6M
4.9M
+1.4%
Added · +67K sh
Q1 2026
13Qube Research & Technologies Ltd
$1.6M
4.9M
+810%
Added · +4.4M sh
Q1 2026
14TWO SIGMA INVESTMENTS, LP
$1.6M
4.8M
+41%
Added · +1.4M sh
Q1 2026
15STATE STREET CORP
$1.4M
4.4M
−53%
Reduced · −4.9M sh
Q1 2026
16Corient Private Wealth LLC
$1.3M
4.0M
+3.6%
Added · +139K sh
Q1 2026
17Squarepoint Ops LLC
$1.1M
3.4M
15×
Added · +3.2M sh
Q1 2026
18BANK OF AMERICA CORP /DE/
$1.0M
3.2M
+66%
Added · +1.3M sh
Q1 2026
19BARCLAYS PLC
$1.0M
3.1M
+432%
Added · +2.5M sh
Q1 2026
20VANGUARD PORTFOLIO MANAGEMENT LLC
$711K
2.2M
New
+2.2M sh
Q1 2026
21Alyeska Investment Group, L.P.
$674K
2.1M
+126%
Added · +1.1M sh
Q1 2026
22UBS Group AG
$620K
1.9M
+6.3%
Added · +112K sh
Q1 2026
23Ensign Peak Advisors, Inc
$559K
1.7M
New
+1.7M sh
Q1 2026
24JACOBS LEVY EQUITY MANAGEMENT, INC
$557K
1.7M
−22%
Reduced · −483K sh
Q1 2026
25Rock Springs Capital Management LP
$529K
1.6M
−51%
Reduced · −1.7M sh
Q1 2026

Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.

Fund activity: latest quarter

Opened (NEW)
12
funds
Added
24
funds
Reduced
11
funds
Exited
0
funds

Funds that own GOSS also own

CompanyCo-held byCombined value
AMAZON.COM INCAMZN71 funds$18.0B
ALPHABET INC-CL AGOOGL71 funds$15.7B
ELI LILLY & COLLY71 funds$6.1B
MICROSOFT CORPMSFT70 funds$24.8B
UNITEDHEALTH GROUP INCUNH70 funds$2.5B
NVIDIA CORPNVDA69 funds$37.1B
META PLATFORMS INC-CLASS AMETA69 funds$11.7B
BOSTON SCIENTIFIC CORPBSX69 funds$1.0B
BROADCOM INCAVGO68 funds$13.1B
TESLA INCTSLA68 funds$7.4B
CHEVRON CORPCVX68 funds$3.4B
DANAHER CORPDHR68 funds$1.1B

Ranked by how many of GOSS's institutional holders also hold each name, a cross-fund conviction signal.

Insider activity (Form 4)

Full insider page →
Buys · 180d
$0
0 insiders
Sells · 180d
$0
0 insiders
Net
$0
0 P/S txns
Signal
Mixed
open-market
DateInsiderRoleActionSharesValue
Aug 19, 2025Milligan SandraDirectorBuy (P)26K$50K
Jun 24, 2024Aranda RichardChief Medical OfficerSell (S)2K$1K
Jun 21, 2024Hasnain FaheemPresident & CEO, DirectorBuy (P)372K$249K
Jun 18, 2024Giraudo BryanCOO/CFOBuy (P)100K$59K
Jun 17, 2024Smith Robert Paul JRChief Commercial OfficerBuy (P)25K$15K
Mar 27, 2024Hasnain FaheemPresident & CEO, DirectorSell (S)23K$27K
Mar 27, 2024Giraudo BryanCOO/CFOSell (S)6K$7K
Mar 27, 2024Christian WaageEVP, Tech Ops and AdminSell (S)6K$7K
Mar 18, 2024Peterson CarynEVP, Regulatory AffairsSell (S)4K$5K
Mar 18, 2024Aranda RichardChief Medical OfficerSell (S)4K$5K
Nov 15, 2023Milligan SandraDirectorBuy (P)32K$25K
Nov 13, 2023Giraudo BryanCOO/CFOBuy (P)200K$112K

Institutional ownership over time

150 funds+78 since Q3 2024
075150Q3 2024Q1 2025Q3 2025Q1 2026
funds holding aggregate valuelatest $51.2M · 2 values withheld

Recent filings

15 shown

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Ask your agent what changed in GOSS

This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.

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curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://arkolith.com/api/v1/stocks/GOSS/capital-change-brief"
Ask your agent
Use Arkolith's capital_change_brief for GOSS.
Tell me what changed, whether insider activity
corroborates it, and cite the SEC evidence.

13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for GOSS. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.