OM Outset Medical, Inc.
Executive Summary
In Q3 2025, three mega-passive institutional holders — BlackRock, State Street, and Morgan Stanley — collectively added $3.3M in OM by increasing their positions by 27% to 257%. BlackRock's dollar position actually fell slightly ($1.3M) due to a sharp Q3 price decline, masking the share accumulation. With zero sellers in this tracked cohort, the cluster signals index-driven rebalancing rather than an active investment thesis.
Key Financial Metrics
Institutional Positions
Net institutional flow: $3.3M
▲ Buyers (3)
| Institution | Action | Change | Position Value | Value Δ |
|---|---|---|---|---|
| BlackRock | ADD | +26.9% | $17.6M | -$1.3M |
| State Street | ADD | +61.6% | $4.7M | $741.0K |
| Morgan Stanley | DOUBLED | +256.9% | $6.1M | $3.8M |
Actionable Insight
The cluster is entirely passive index/rebalancing activity — no active manager conviction signal. With no sellers and modest share accumulation from BlackRock/State Street/Morgan Stanley, the data suggests OM may have been added to a small-cap index or was a routine rebalance. Monitor next 13F cycle for any active-fund buying before considering this a genuine catalyst.
Key Facts
- 3 buyers, 0 sellers among tracked institutions in Q3 2025
- Aggregate position value: $28.4M, net increase of $3.3M from share accumulation
- Morgan Stanley doubled its stake (+257%), adding $3.8M in value despite OM's decline
- BlackRock added 265K shares (+27%) but dollar value fell $1.3M due to price drop
- All three buyers are mega-passive/index managers, not active funds
- No institutional sellers in this tracked cohort
Financial Impact
3 mega-passive funds accumulated $28.4M in aggregate OM positions, adding a net $3.3M of new buying; zero tracked institutions sold.
Risk Factors
- 13F data reflects quarter-end positions as of Sep 30, 2025; holdings may have been reduced since
- All buyers are passive managers — the signal is index rebalancing, not fundamental conviction
- OM's Q3 price declined sharply (BlackRock's dollar value fell despite adding shares), suggesting fundamental headwinds remain
Market Snapshot
Documents Analyzed
This report is based on 1 institutional 13F filing from SEC EDGAR.
| Document | Accession Number |
|---|---|
| INST-CLUSTER Data (Synthetic) | inst-cluster-OM-2025-Q3 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
|
Jun 11, 2026
2d ago
|
Institutional Cluster
| $4.66 awaiting T+5 | awaiting T+5 | — | — |
|
May 20, 2026
24d ago
|
Insider Cluster
| $4.38 $5.01 | ▲ +14.38% | ▲ +12.58% | — |
|
May 16, 2026
28d ago
|
144
| $3.72 $4.40 | ▲ +18.28% | ▲ +16.66% | — |
|
Apr 27, 2026
6w ago
|
Press Release
| $4.32 $4.33 | ▲ +0.23% | ▼ −1.46% | — |
|
Apr 24, 2026
7w ago
|
DEFA14A
| $4.41 $4.33 | ▼ −1.81% | ▼ −2.21% | — |
|
Apr 8, 2026
9w ago
|
Press Release
| $4.32 $4.40 | ▲ +1.85% | ▼ −1.33% | — |
US Market Status
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