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Livermore
Livermore
ZHEN

Outset Medical, Inc.

OM
Exchange
Nasdaq
Industry
Electromedical & Electrotherapeutic Apparatus
SEC CIK
0001484612

In the last 90 days, Outset Medical, Inc. insiders filed 0 open-market purchases and 3 sales; 92 institutions reported holding it in 13F filings for Q2 2026, worth $59.8M in total; no superinvestor holds it.

Holders of 5% or more of OM

Holders whose latest Schedule 13D or 13G filing reports 5% or more of Outset Medical, Inc., largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of OM
HolderLatest formStakeChangeFirst filedLatest filingFiling
FMR LLC13G/A14.50%2.60M shares+7.50 ppfrom 7.00%Feb 12, 20252 filingsApr 7, 2025SEC
BML Investment Partners, L.P.13G/A10.50%1.90M shares+1.10 ppfrom 9.40%Jan 14, 20262 filingsFeb 13, 2026SEC
Alyeska Investment Group, L.P.13G9.61%1.70M sharesNewMay 15, 20251 filingMay 15, 2025SEC
Perceptive Advisors LLC13G9.50%5.63M sharesNewFeb 28, 20251 filingFeb 28, 2025SEC
Woodline Partners LP13G7.50%1.33M sharesNewMay 15, 20251 filingMay 15, 2025SEC
BlackRock, Inc.13G/A6.80%1.21M shares+1.30 ppfrom 5.50%Jul 17, 20252 filingsOct 17, 2025SEC
Perceptive Advisors LLC13G/A6.70%1.21M shares–May 15, 20251 filingMay 15, 2025SEC
Bank of America Corp13G5.20%950.6K sharesNewFeb 11, 20261 filingFeb 11, 2026SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

21 Schedule 13D and 13G filings on Outset Medical, Inc., newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on OM
Filed (ET)FilerFormStakeChangeEvent dateFiling
Mar 27, 202611:19 AM ETVanguard Group Inc13G/A0.00%0 shares−5.59 ppfrom 5.59%Below 5%Mar 13, 2026SEC
Feb 17, 20264:14 PM ETDurable Capital Partners LP13G/A0.00%0 shares−7.60 ppfrom 7.60%Below 5%Dec 31, 2025SEC
Feb 17, 20264:02 PM ETPFM Health Sciences, LPand 4 others13G/A2.90%530.8K shares−6.50 ppfrom 9.40%Below 5%Dec 31, 2025SEC
Feb 13, 20265:52 PM ETBML Investment Partners, L.P.13G/A10.50%1.90M shares+1.10 ppfrom 9.40%Feb 12, 2026SEC
Feb 11, 20262:05 PM ETBank of America Corp13G5.20%950.6K sharesNewDec 31, 2025SEC
Jan 14, 20264:23 PM ETBML Investment Partners, L.P.13G9.40%1.71M sharesNewJan 12, 2026SEC
Nov 14, 20254:28 PM ETDurable Capital Partners LP13G/A7.60%1.37M shares−2.30 ppfrom 9.90%Sep 30, 2025SEC
Nov 14, 202512:18 PM ETT. Rowe Price Investment Management, Inc.13G/A0.00%2.40K shares−8.90 ppfrom 8.90%Below 5%Sep 30, 2025SEC
Oct 17, 20256:41 PM ETBlackRock, Inc.13G/A6.80%1.21M shares+1.30 ppfrom 5.50%Sep 30, 2025SEC
Jul 29, 20252:14 PM ETVanguard Group Inc13G5.59%991.4K sharesNewJun 30, 2025SEC
Jul 17, 20258:12 PM ETBlackRock, Inc.13G5.50%981.0K sharesNewJun 30, 2025SEC
May 15, 20254:30 PM ETPerceptive Advisors LLCand 3 others13G/A6.70%1.21M shares–Mar 31, 2025SEC
May 15, 20254:27 PM ETAlyeska Investment Group, L.P.and 2 others13G9.61%1.70M sharesNewMar 31, 2025SEC
May 15, 20259:30 AM ETWoodline Partners LP13G7.50%1.33M sharesNewMar 31, 2025SEC
May 14, 202510:47 AM ETT. Rowe Price Investment Management, Inc.13G/A8.90%1.60M shares–Mar 31, 2025SEC
Apr 7, 202510:07 AM ETFMR LLCand 1 other13G/A14.50%2.60M shares+7.50 ppfrom 7.00%Mar 31, 2025SEC
Mar 17, 20254:03 PM ETPFM Health Sciences, LPand 4 others13G9.40%25.0M sharesNewMar 10, 2025SEC
Feb 28, 20259:15 PM ETPerceptive Advisors LLCand 3 others13G9.50%5.63M sharesNewJan 8, 2025SEC
Feb 12, 20259:34 AM ETFMR LLCand 1 other13G/A7.00%3.67M shares–Dec 31, 2024SEC
Jan 31, 20259:55 AM ETVanguard Group Inc13G/A4.96%2.61M shares–Below 5%Dec 31, 2024SEC
Jan 10, 20255:30 PM ETDurable Capital Partners LP13G9.90%26.6M sharesNewJan 3, 2025SEC

Form 144: proposed insider sales

Notices from officers, directors and other affiliates planning to sell Outset Medical, Inc. shares.

No Form 144 notices for Outset Medical, Inc. are on file.