Save your place

Sign in to WhoBought

Please try again later.

Outset Medical, Inc. (OM) institutional ownership

Latest close $4.57 Jul 31, 2026
Market cap$267M 52-week range SectorHealthcare
Funds holding · Q1 2026
103
reported OM position changes
Top owners · Q2 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
56 buyers · 47 sellers

Outset Medical, Inc. (OM) price and institutional activity

Dates

Q1 2026

$0 bought by 56 investors
Bml Capital Management, LLCAQR Capital Management LLC +54 more
$0 sold by 47 investors
Alyeska Investment Group, L.P.Woodline Partners LP +45 more
Bought Sold Totals per quarter; hover a bar for the names.

Outset Medical, Inc. (OM) institutional activity · 47

Investor Type Est. change Change Δ Own Date
Alyeska Investment Group, L.P. · Exited
Change −1.6M Δ Own −100.0% Date Q1 2026
Alyeska Investment Group, L.P. Exited· Q1 2026 −1.6M −100.0% Q1 2026
Woodline Partners LP · Reduced
Change −1.0M Date Q1 2026
Woodline Partners LP Reduced· Q1 2026 −1.0M Q1 2026
Marshall Wace, LLP · Exited
Change −171K Δ Own −100.0% Date Q1 2026
Marshall Wace, LLP Exited· Q1 2026 −171K −100.0% Q1 2026
Deutsche Bank AG · Reduced
Change −147K Date Q1 2026
Deutsche Bank AG Reduced· Q1 2026 −147K Q1 2026
Northern Trust · Reduced
Change −107K Date Q1 2026
Northern Trust Reduced· Q1 2026 −107K Q1 2026
Acadian Asset Management LLC · Reduced
Change −88K Date Q1 2026
Acadian Asset Management LLC Reduced· Q1 2026 −88K Q1 2026
Stifel Financial Corp · Exited
Change −80K Δ Own −100.0% Date Q1 2026
Stifel Financial Corp Exited· Q1 2026 −80K −100.0% Q1 2026
Squarepoint Ops LLC · Exited
Change −59K Δ Own −100.0% Date Q1 2026
Squarepoint Ops LLC Exited· Q1 2026 −59K −100.0% Q1 2026
Gmt Capital Corp · Reduced
Change −56K Date Q1 2026
Gmt Capital Corp Reduced· Q1 2026 −56K Q1 2026
Graham Capital Management, L.P. · Exited
Change −51K Δ Own −100.0% Date Q1 2026
Graham Capital Management, L.P. Exited· Q1 2026 −51K −100.0% Q1 2026
Aristides Capital LLC · Exited
Change −48K Δ Own −100.0% Date Q1 2026
Aristides Capital LLC Exited· Q1 2026 −48K −100.0% Q1 2026
Dimensional · Reduced
Change −45K Date Q1 2026
Dimensional Reduced· Q1 2026 −45K Q1 2026
Paradigm Capital Management Inc · Exited
Change −40K Δ Own −100.0% Date Q1 2026
Paradigm Capital Management Inc Exited· Q1 2026 −40K −100.0% Q1 2026
Ensign Peak Advisors, Inc · Reduced
Change −34K Date Q1 2026
Ensign Peak Advisors, Inc Reduced· Q1 2026 −34K Q1 2026
Gsa Capital Partners LLP · Exited
Change −33K Δ Own −100.0% Date Q1 2026
Gsa Capital Partners LLP Exited· Q1 2026 −33K −100.0% Q1 2026
Data through Q1 2026 · filed May 29, 2026
15 of 47

Famous investor activity in Outset Medical, Inc. (OM)

Outset Medical, Inc. (OM) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Brottem John L. · Officer Grant (A) 60K
Owned 90K ΔOwn +197.6% Trade date Jun 26, 2026 Filed date Jun 29, 2026
Brottem John L. Officer Grant (A) 60K 90K +197.6% Jun 26, 2026 Jun 29, 2026
Gaeta Renee · Officer Grant (A) 72K
Owned 185K ΔOwn +63.0% Trade date Jun 26, 2026 Filed date Jun 29, 2026
Gaeta Renee Officer Grant (A) 72K 185K +63.0% Jun 26, 2026 Jun 29, 2026
Trigg Leslie · Director Grant (A) 99K
Owned 198K ΔOwn +100.3% Trade date Jun 26, 2026 Filed date Jun 29, 2026
Trigg Leslie Director Grant (A) 99K 198K +100.3% Jun 26, 2026 Jun 29, 2026
Hackett Patrick T. · Director Grant (A) 11K
Owned 106K Trade date Jun 4, 2026 Filed date Jun 5, 2026
Hackett Patrick T. Director Grant (A) 11K 106K Jun 4, 2026 Jun 5, 2026
Oboyle Kevin C. · Director Grant (A) 11K
Owned 35K Trade date Jun 4, 2026 Filed date Jun 5, 2026
Oboyle Kevin C. Director Grant (A) 11K 35K Jun 4, 2026 Jun 5, 2026
Prange Karen · Director Grant (A) 11K
Owned 29K Trade date Jun 4, 2026 Filed date Jun 5, 2026
Prange Karen Director Grant (A) 11K 29K Jun 4, 2026 Jun 5, 2026
Lang Brent D. · Director Grant (A) 11K
Owned 29K Trade date Jun 4, 2026 Filed date Jun 5, 2026
Lang Brent D. Director Grant (A) 11K 29K Jun 4, 2026 Jun 5, 2026
Grossman D. Keith · Director Grant (A) 11K
Owned 25K Trade date Jun 4, 2026 Filed date Jun 5, 2026
Grossman D. Keith Director Grant (A) 11K 25K Jun 4, 2026 Jun 5, 2026
Drexler Karen · Director Grant (A) 11K
Owned 21K Trade date Jun 4, 2026 Filed date Jun 5, 2026
Drexler Karen Director Grant (A) 11K 21K Jun 4, 2026 Jun 5, 2026
Gaeta Renee · CFO Sell −$87K
Price $4.94 Qty −18K Owned 114K Trade date Jun 3, 2026 Filed date Jun 5, 2026
Gaeta Renee CFO Sell $4.94 −18K −$87K 114K Jun 3, 2026 Jun 5, 2026
Trigg Leslie · Director Sell −$13K
Price $3.70 Qty −3K Owned 99K Trade date May 15, 2026 Filed date May 19, 2026
Trigg Leslie Director Sell $3.70 −3K −$13K 99K May 15, 2026 May 19, 2026
Nash Marc · Officer Sell −$6K
Price $3.70 Qty −2K Owned 38K Trade date May 15, 2026 Filed date May 19, 2026
Nash Marc Officer Sell $3.70 −2K −$6K 38K May 15, 2026 May 19, 2026
Brottem John L. · Officer Sell −$10K
Price $3.70 Qty −3K Owned 30K Trade date May 15, 2026 Filed date May 19, 2026
Brottem John L. Officer Sell $3.70 −3K −$10K 30K May 15, 2026 May 19, 2026
Leonard Braden Michael · 10% Owner Exercise or conversion (M/X/C) $1.6M
Price $5.00 Qty 323K Owned 2.5M Trade date May 15, 2026 Filed date May 18, 2026
Leonard Braden Michael 10% Owner Exercise or conversion (M/X/C) $5.00 323K $1.6M 2.5M May 15, 2026 May 18, 2026
Leonard Braden Michael · 10% Owner Exercise or conversion (M/X/C) $484K
Price $5.00 Qty 97K Owned 2.2M Trade date May 11, 2026 Filed date May 12, 2026
Leonard Braden Michael 10% Owner Exercise or conversion (M/X/C) $5.00 97K $484K 2.2M May 11, 2026 May 12, 2026
15 of 38
15 of 38 Sign in to continue to older insider transactions.

Outset Medical, Inc. (OM) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
Bml Investment Partners, L.P. 2.5M
% of shares outstanding 13.6% Filing date May 18, 2026
Bml Investment Partners, L.P. 2.5M 13.6% May 18, 2026
Perceptive Advisors LLC 5.6M
% of shares outstanding 9.5% Filing date Feb 28, 2025
Perceptive Advisors LLC 5.6M 9.5% Feb 28, 2025
FMR LLC 3.7M
% of shares outstanding 7.0% Filing date Feb 12, 2025
FMR LLC 3.7M 7.0% Feb 12, 2025
Bellevue Group AG 1.8M
% of shares outstanding 3.5% Filing date Feb 13, 2024
Bellevue Group AG 1.8M 3.5% Feb 13, 2024
Ameriprise Financial Inc 1.8M
% of shares outstanding 3.4% Filing date Sep 10, 2024
Ameriprise Financial Inc 1.8M 3.4% Sep 10, 2024
Pfm Health Sciences, LP 531K
% of shares outstanding 2.9% Filing date Feb 17, 2026
Pfm Health Sciences, LP 531K 2.9% Feb 17, 2026
Blackrock, Inc. 366K
% of shares outstanding 2.0% Filing date Jul 29, 2026
Blackrock, Inc. 366K 2.0% Jul 29, 2026
BlackRock Inc. 880K
% of shares outstanding 1.7% Filing date Jul 8, 2024
BlackRock Inc. 880K 1.7% Jul 8, 2024
8 of 15

Outset Medical, Inc. (OM) ownership FAQ

Who owns OM?

103 reporting institutions disclosed OM position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.