Outset Medical, Inc.: which funds bought and sold

Institutions that bought and sold Outset Medical shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 53 institutions that filed 13F reports for both quarters added to or opened positions in Outset Medical, and 48 cut or closed them. Together they sold a net 573K shares, −3.9% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 107K shares (+1.9%); index fund managers were net sellers of 1.5M shares (−48.1%). 21 opened a new position and 22 sold out entirely.

Bought, Q2 2026 53 institutions, 21 of them new holders Sold, Q2 2026 48 institutions, 22 of them sold out

Net change, all compared −573K shares (−3.9%)

Net change, active managers +107K shares (+1.9%), 9 bought, 9 sold

Buyers versus sellers

institutions compared, 114

53 bought 13 48 sold

Active managers and hedge funds 9 bought · 9 sold · +107K

Index fund managers 2 bought · 7 sold · −1.5M

Other institutions 42 bought · 32 sold · +851K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Bml Capital Management, LLC	+618K +32.5%	2.5M	$10.9M
Peapod Lane Capital LLC	+332K New position	332K	$1.4M
Marshall Wace, LLP Hedge fund	+212K New position	212K	$915,809
AQR Capital Management LLC Hedge fund	+191K +23.6%	999K	$4.3M
Millennium Management LLC Hedge fund	+182K New position	182K	$785,350
Assenagon Asset Management S.A.	+175K +34.7%	679K	$2.9M
Goldman Sachs Group Inc	+80K +85.8%	173K	$749,348
Jane Street Group, LLC	+74K +114.8%	139K	$601,331
Gmt Capital Corp	+56K +131.3%	98K	$423,827
Susquehanna International Group, LLP	+53K +190.6%	81K	$350,019
Marquette Asset Management, LLC	+49K New position	49K	$211,598
Clayton Partners LLC	+38K New position	38K	$162,117
Jain Global LLC Hedge fund	+33K New position	33K	$142,970
HRT Financial LP	+33K New position	33K	$142,000
Barclays PLC	+32K +296.3%	43K	$184,771
Bridgeway Capital Management, LLC Active manager	+25K New position	25K	$108,000
Squarepoint Ops LLC Hedge fund	+23K New position	23K	$98,073
Catalyst Funds Management Pty Ltd	+19K New position	19K	$82,948
Vanguard Capital Management LLC Index funds	+16K +2.1%	780K	$3.4M
Arax Advisory Partners	+15K +12672.1%	16K	$67,315

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Marshall Wace, LLP Hedge fund	+212K New position	212K	$915,809
AQR Capital Management LLC Hedge fund	+191K +23.6%	999K	$4.3M
Millennium Management LLC Hedge fund	+182K New position	182K	$785,350
Jain Global LLC Hedge fund	+33K New position	33K	$142,970
Bridgeway Capital Management, LLC Active manager	+25K New position	25K	$108,000
Squarepoint Ops LLC Hedge fund	+23K New position	23K	$98,073
Citadel Advisors LLC Hedge fund	+11K New position	11K	$48,293
FMR LLC Active manager	+1,214 0.0%	2.7M	$11.8M
Federated Hermes, Inc. Active manager	+650 New position	650	$2,808

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Blackrock, Inc. Index funds	−845K −66.9%	418K	$1.8M
Woodline Partners LP Hedge fund	−292K Sold out	0	—
Bank Of America Corp	−284K −29.9%	666K	$2.9M
State Street Corp Index funds	−254K −75.8%	81K	$350,810
Geode Capital Management, LLC Index funds	−217K −51.4%	205K	$884,538
Renaissance Technologies LLC Hedge fund	−179K −80.4%	43K	$187,609
Jpmorgan Chase & Co	−99K −98.5%	1,493	$6,465
Vanguard Portfolio Management LLC Index funds	−99K Sold out	0	—
Ensign Peak Advisors, Inc	−92K −17.5%	434K	$1.9M
Northern Trust Corp Index funds	−82K −65.3%	44K	$188,239
Nuveen, LLC	−66K Sold out	0	—
UBS Group AG	−62K −24.6%	190K	$822,048
Engineers Gate Manager LP Hedge fund	−50K −74.7%	17K	$73,168
Charles Schwab Investment Management Inc Index funds	−41K Sold out	0	—
Sei Investments Co	−35K Sold out	0	—
Bank Of New York Mellon Corp	−34K −55.3%	28K	$120,523
Deutsche Bank Ag\	−30K Sold out	0	—
Dimensional Fund Advisors LP	−23K −20.0%	91K	$391,828
Xtx Topco Ltd	−18K −12.5%	125K	$538,661
BNP Paribas Financial Markets	−14K −33.4%	29K	$123,634

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Woodline Partners LP Hedge fund	−292K Sold out	0	—
Renaissance Technologies LLC Hedge fund	−179K −80.4%	43K	$187,609
Engineers Gate Manager LP Hedge fund	−50K −74.7%	17K	$73,168
Pfm Health Sciences, LP Hedge fund	−13K −2.1%	582K	$2.5M
Centiva Capital, LP Hedge fund	−11K −21.6%	40K	$171,871
Alliancebernstein L.P. Active manager	−10K Sold out	0	—
Los Angeles Capital Management LLC Active manager	−7,805 Sold out	0	—
Acadian Asset Management LLC Active manager	−4,705 −11.8%	35K	$149,000
Price T Rowe Associates Inc Active manager	−3,805 −9.7%	36K	$154,000

New positions

largest by value

Institution	Shares	Value June 30, 2026
Peapod Lane Capital LLC	332K	$1.4M
Marshall Wace, LLPHedge fund	212K	$915,809
Millennium Management LLCHedge fund	182K	$785,350
Marquette Asset Management, LLC	49K	$211,598
Clayton Partners LLC	38K	$162,117
Jain Global LLCHedge fund	33K	$142,970
HRT Financial LP	33K	$142,000
Bridgeway Capital Management, LLCActive manager	25K	$108,000
Squarepoint Ops LLCHedge fund	23K	$98,073
Catalyst Funds Management Pty Ltd	19K	$82,948

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Woodline Partners LPHedge fund	292K	$1.1M
Vanguard Portfolio Management LLCIndex funds	99K	$378,662
Nuveen, LLC	66K	$251,847
Charles Schwab Investment Management IncIndex funds	41K	$158,062
Sei Investments Co	35K	$135,805
Deutsche Bank Ag\	30K	$116,671
Imc-Chicago, LLC	10K	$39,648
Alliancebernstein L.P.Active manager	10K	$38,584
Mirae Asset Global Etfs Holdings Ltd.	8,226	$31,588
Los Angeles Capital Management LLCActive manager	7,805	$29,971

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 92
Ten largest holders: 75.1%
Index fund managers: 11.6%
Active managers and hedge funds: 41.2%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	9	9	7	3	+107K	+1.9%
Index fund managers	2	7	0	2	−1.5M	−48.1%
Other institutions	42	32	14	17	+851K	+14.6%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Outset Medical.

Only managers that filed a holdings report for both quarters are compared (114 here). 2 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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