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Institutional Cluster

GOSS

Gossamer Bio, Inc.
NEUTRAL
Impact 3/10
Horizonweeks Processed4mo ago
Institutional cluster: 4 buyers, 2 sellers (mixed)
Actionable Insight • Neutral

The cluster is entirely passive/index-driven with no active manager conviction — treat as index rebalancing noise, not a fundamental signal. Monitor for any active fund 13F filings or insider buying to confirm a real thesis shift. Given GOSS's $37M market cap, the $20M net inflow is large relative to float but likely mechanical.

DirectionNeutral
Confidencemedium
Horizonweeks
Final — all horizons settled through T+60d
GOSS ▼ -1.18% at T+60d
NEUTRAL call -1.18% · α vs SPY -5.58% · entry $0.1774 → $0.1753
Entry = T+0 close
Jun 11, 2026
via day close
T+1d
-8.74%
call -8.74% · α -9.28%
$0.1619
settled 5mo ago
T+5d
+0.90%
call +0.90% · α +0.47%
$0.1790
settled 4mo ago
T+20d
-1.35%
call -1.35% · α -3.24%
$0.1750
settled 4mo ago
T+60d
-1.18%
call -1.18% · α -5.58%
$0.1753
settled 7w ago

Executive Summary

Four mega-passive institutional investors (State Street, Invesco, UBS, BofA) significantly increased their GOSS holdings in Q3 2025, adding $22.2M in net new positions, while two sellers (Fidelity, Morgan Stanley) trimmed $2.2M.

Key Financial Metrics

Direction
accumulating
Buy Value
$26.0M
Sell Value
$12.2M
Net Flow
$20.0M

Institutional Positions

Net institutional flow: $20.0M

▲ Buyers (4)

InstitutionActionChangePosition ValueValue Δ
State StreetADD+56.5%$10.2M$7.2M
InvescoADD+47.2%$926.0K$632.0K
UBSDOUBLED+785.7%$7.3M$6.9M
BofADOUBLED+4196.2%$7.6M$7.5M

▼ Sellers (2)

InstitutionActionChangePrev ValueValue Δ
FidelityTRIM-44.2%$9.0M$1.7M
Morgan StanleyTRIM-30.8%$1.0M$483.0K

Key Facts

  • 4 buyers added $22.2M net; 2 sellers reduced $2.2M; aggregate net buying of $20.0M
  • All 6 institutions are mega-passive (index/rebalancing) — no active managers or hedge funds involved
  • UBS and BofA both DOUBLED positions, with BofA increasing shares by 4,196% (67K → 2.88M shares)
  • Fidelity trimmed 44.2% of its position (7.32M → 4.09M shares) but value rose $1.7M due to stock appreciation

Financial Impact

4 passive institutions accumulated $22.2M in new GOSS positions while 2 passive institutions reduced holdings by $2.2M, for a net institutional inflow of $20.0M in Q3 2025

institutional ownershipfloat

Risk Factors

  • 13F data is 45+ days stale; positions may have been unwound since quarter-end
  • Passive flows can reverse on next rebalance date with no fundamental catalyst

Market Snapshot

Exchange
Nasdaq
Sector
Pharmaceutical Preparations
Analyst Consensus
57% bullish (14 analysts)

Investment Themes

Documents Analyzed

This report is based on 1 institutional 13F filing from SEC EDGAR.

DocumentAccession Number
INST-CLUSTER Data (Synthetic)inst-cluster-GOSS-2025-Q3
15 reports for GOSS
Performance horizon
75% Hit rate @ T+20 3 of 4 directional calls Went positive at some point 6 of 6 best @ T+60▲ +25.28%Jun 17, 2026
Filters
Rows
Reports for GOSS — sortable, filterable
TypeNow
Oct 8, 2026
17d ago
SC 13D/A
BEARISH ★ 5/10
$9.31awaiting T+20——
Sep 28, 2026
27d ago
SC 13D/A
BEARISH ★ 6/10
$11.58awaiting T+20——
Sep 22, 2026
4w ago
Institutional Cluster
MIXED ★ 4/10
$11.69 $9.58▼ −18.05%▼ −17.49%—
Sep 16, 2026
5w ago
8-K
NEUTRAL ★ 4/10
$11.94 $8.89▼ −25.54%▼ −26.75%—
Sep 11, 2026
6w ago
8-K
BEARISH ★ 6/10
$10.73 $9.31▲ +13.23%▲ +15.10%—
Sep 9, 2026
6w ago
8-K
NEUTRAL ★ 3/10
$0.1597 $0.1273▼ −20.32%▼ −22.26%—
Aug 21, 2026
9w ago
8-K
BEARISH ★ 6/10
$0.1547 $0.1410▲ +8.86%▲ +9.87%—
Aug 13, 2026
10w ago
8-K
NEUTRAL ★ 5/10
$0.1542 $0.1337▼ −13.26%▼ −11.27%—
Jul 1, 2026
16w ago
8-K
BEARISH ★ 5/10
$0.1677 $0.1783▼ −6.32%▼ −6.87%—
Jun 17, 2026
18w ago
8-K
BEARISH ★ 7/10
$0.1790 $0.1701▲ +4.97%▲ +5.29%—
Showing 10 of 15

US Market Status

Market Closed — Opens Tue (< 1m)

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Report published Jun 11, 2026