Outset Medical, Inc. (OM) Ownership
OM ownership summary
as of October 18, 2026- Institutions
- 74.9% of shares outstanding
- Insiders
- 5.46% of shares outstanding
- Shares outstanding
- 18.8M
- Float
- 14.5M shares available to trade
- Short interest
- 5.70% 793K shares short
- Days to cover
- 5.73 short interest down 10.9% vs prior month
- Institutions 74.94%
- Insiders 5.46%
- Other investors 19.60%
OM top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | FMR Inc | 14.59% | 2.7M | $10.8M | +1,214 (+0.0%) | June 30, 2026 |
| 2 | BML Capital Management LLC | 13.40% | 2.5M | $9.9M | +617,500 (+32.5%) | June 30, 2026 |
| 3 | AQR Capital Management LLC | 5.31% | 999K | $3.9M | +190,676 (+23.6%) | June 30, 2026 |
| 4 | Perceptive Advisors LLC | 4.43% | 833K | $3.3M | — | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 4.15% | 780K | $3.1M | +16,312 (+2.1%) | June 30, 2026 |
| 6 | Assenagon Asset Management SA | 3.61% | 679K | $2.7M | +174,783 (+34.7%) | June 30, 2026 |
| 7 | Bank of America Corp | 3.54% | 666K | $2.6M | −283,550 (−29.9%) | June 30, 2026 |
| 8 | Partner Fund Management LP | 3.10% | 582K | $2.3M | −12,508 (−2.1%) | June 30, 2026 |
| 9 | Ensign Peak Advisors Inc | 2.31% | 434K | $1.7M | −92,244 (−17.5%) | June 30, 2026 |
| 10 | BlackRock Inc | 2.22% | 418K | $1.6M | −845,008 (−66.9%) | June 30, 2026 |
| 11 | Peapod Lane Capital LLC | 1.77% | 332K | $1.3M | +331,951 (0.0%) | June 30, 2026 |
| 12 | Marshall Wace Asset Management Ltd | 1.13% | 212K | $835,252 | +211,993 (0.0%) | June 30, 2026 |
| 13 | Geode Capital Management, LLC | 1.09% | 205K | $806,329 | −216,721 (−51.4%) | June 30, 2026 |
| 14 | Stratos Wealth Partners, LTD | 1.07% | 201K | $790,151 | — | June 30, 2026 |
| 15 | UBS Group AG | 1.01% | 190K | $749,739 | −62,210 (−24.6%) | June 30, 2026 |
| 16 | Morgan Stanley - Brokerage Accounts | 0.97% | 182K | $717,013 | +12,540 (+7.4%) | June 30, 2026 |
| 17 | Millennium Management LLC | 0.97% | 182K | $716,268 | +181,794 (0.0%) | June 30, 2026 |
| 18 | The Goldman Sachs Group Inc | 0.92% | 173K | $683,432 | +80,100 (+85.8%) | June 30, 2026 |
| 19 | Jane Street Group LLC | 0.74% | 139K | $548,436 | +74,387 (+114.8%) | June 30, 2026 |
| 20 | XTX Topco Ltd | 0.66% | 125K | $491,279 | −17,760 (−12.5%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 11 holders added 1.9M shares and 7 cut 1.5M.
OM top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Fidelity Select Health Care | 8.09% | 1.5M | $6.0M | — | August 31, 2026 |
| 2 | Fidelity Advisor Health Care I | 4.26% | 800K | $3.2M | — | August 31, 2026 |
| 3 | Vanguard MStar Total Stk Mkt Idx Invest | 2.94% | 553K | $2.2M | — | August 31, 2026 |
| 4 | Fidelity VIP Health Care Initial | 1.49% | 280K | $1.1M | — | August 31, 2026 |
| 5 | C WorldWide Healthcare Select 1A | 0.35% | 67K | $262,664 | — | June 30, 2026 |
| 6 | BSF Systematic US Eq Abs Ret A2 USD | 0.33% | 62K | $243,788 | — | December 31, 2025 |
| 7 | Fidelity Extended Market Index | 0.30% | 56K | $220,758 | −301 (−0.5%) | August 31, 2026 |
| 8 | iShares Micro-Cap ETF | 0.29% | 55K | $217,874 | −381 (−0.7%) | September 30, 2026 |
| 9 | AQR Delphi L/S Eq IAU1F | 0.25% | 47K | $183,604 | +46,600 (0.0%) | March 31, 2026 |
| 10 | Dimensional US Small Cap ETF | 0.20% | 37K | $146,485 | — | September 30, 2026 |
| 11 | Fidelity Total Market Index | 0.19% | 36K | $142,159 | — | August 31, 2026 |
| 12 | Fidelity Disruptive Medicine ETF | 0.18% | 34K | $133,960 | — | September 30, 2026 |
| 13 | AQR Small Cap Multi-Style I | 0.17% | 32K | $125,501 | −4,650 (−12.7%) | June 30, 2026 |
| 14 | Fidelity Series Total Market Index | 0.15% | 28K | $109,067 | — | August 31, 2026 |
| 15 | Avantis US Small Cap Equity ETF | 0.14% | 27K | $105,336 | — | September 30, 2026 |
| 16 | EA Bridgeway Ultra-Small Company Mkt ETF | 0.13% | 25K | $97,168 | — | September 30, 2026 |
| 17 | Dimensional US Core Equity 2 ETF | 0.13% | 24K | $95,864 | — | September 30, 2026 |
| 18 | Fidelity Nasdaq Composite Index | 0.08% | 15K | $57,162 | — | August 31, 2026 |
| 19 | T. Rowe Price Extended Equity Market Idx | 0.07% | 14K | $54,372 | — | August 31, 2026 |
| 20 | Goldman Sachs Absolute Ret Trckr Instl | 0.07% | 13K | $51,208 | +7,859 (+153.0%) | June 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
OM insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-17 | Leslie Trigg | Sell | $3.35 | 3,361 | $11,259 |
| 2026-02-17 | Marc Nash | Sell | $3.35 | 1,817 | $6,087 |
| 2026-02-17 | John L Brottem | Sell | $3.35 | 2,842 | $9,521 |
| 2026-01-21 | John L Brottem | Sell | $5.01 | 1,180 | $5,912 |
| 2026-01-21 | Leslie Trigg | Sell | $5.05 | 2,120 | $10,706 |
| 2026-01-21 | Marc Nash | Sell | $4.98 | 980 | $4,880 |
| 2026-01-20 | John L Brottem | Sell | $5.12 | 9,314 | $47,688 |
| 2026-01-20 | Leslie Trigg | Sell | $5.12 | 11,794 | $60,385 |
| 2026-01-20 | Marc Nash | Sell | $5.12 | 5,375 | $27,520 |
| 2026-01-07 | Leslie Trigg | Sell | $4.27 | 1,795 | $7,665 |
| 2026-01-07 | Marc Nash | Sell | $4.27 | 108 | $461 |
| 2026-01-07 | John L Brottem | Sell | $4.27 | 224 | $956 |
| 2025-12-01 | Karen Drexler | Sell | $4.37 | 1,548 | $6,765 |
| 2025-11-17 | John L Brottem | Sell | $4.60 | 388 | $1,785 |
| 2025-11-17 | Leslie Trigg | Sell | $4.60 | 916 | $4,214 |
| 2025-11-17 | Marc Nash | Sell | $4.60 | 247 | $1,136 |
| 2025-05-15 | John L Brottem | Sell | $17.82 | 396 | $7,057 |
| 2025-05-15 | Leslie Trigg | Sell | $17.80 | 935 | $16,643 |
| 2025-05-15 | Marc Nash | Sell | $17.82 | 252 | $4,491 |
| 2025-05-15 | Nabeel Ahmed | Sell | $17.81 | 584 | $10,401 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
OM shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns OM
Institutional investors own 74.9% of Outset Medical's shares and insiders 5.46%. The largest holder is FMR Inc with 14.59% of the shares (2.7M), as of June 30, 2026. Among the top 20 institutions, 11 added shares and 7 reduced their stake in the latest filings. Short interest is 5.70% of the float, or 5.73 days of average trading volume. The share count rose 788.4% since 2019.
Related: OM analyst forecast, OM key metrics. See the OM stock overview for the latest quote and news.
OM ownership FAQ
Who owns the most Outset Medical stock?
The largest shareholders of Outset Medical are FMR Inc (14.59%), BML Capital Management LLC (13.40%), AQR Capital Management LLC (5.31%), Perceptive Advisors LLC (4.43%), Vanguard Capital Management, LLC (4.15%).
What percentage of Outset Medical is owned by institutions?
Institutions hold 74.9% of Outset Medical's shares outstanding; insiders hold 5.46%.
Which funds own Outset Medical?
The largest fund holders of Outset Medical are Fidelity Select Health Care (8.09%), Fidelity Advisor Health Care I (4.26%), Vanguard MStar Total Stk Mkt Idx Invest (2.94%), Fidelity VIP Health Care Initial (1.49%), C WorldWide Healthcare Select 1A (0.35%).
What is Outset Medical's short interest?
793K shares of Outset Medical were sold short, 5.70% of the float; at the average daily volume it would take 5.73 days to cover.
Are insiders buying or selling Outset Medical?
Of the latest 20 reported insider transactions in Outset Medical (since May 15, 2025), 0 were purchases and 20 were sales.
How many shares of Outset Medical are outstanding?
Outset Medical has 18.8M shares outstanding, of which 14.5M are in the public float.