$MASI is held by 12 managers from the Top-Performer cohort as of Q1 2026. Position weights range from 0.00% to 0.73%, with an average of 0.15% of portfolio. Largest holder: WINTON GROUP Ltd at 0.73%. A weekly Smart-Money commentary for this ticker has not been generated yet this batch — the table below shows the full cohort positioning.
Masimo Corp
13F holders
430
Net 13F flow · Q
—
Insider buys · 90d
0
Insider net · 90d
—
Congress · 90d
0
Convergence
—
Institutional holders
Top 10 of 430 · Source: 13F-HR01
Dean, Jacobson Financial Services, LLC
—
—
02
Ninety One UK Ltd
—
—
03
Deerfield Management Company, L.p. (series C)
—
—
04
Evergreen Capital Management LLC
—
—
05
Siemens Pension Trust E V
—
—
06
Axa S.a.
—
—
07
State Street
—
—
08
Cable Hill Partners, LLC
—
—
09
12 West Capital Management LP
—
—
10
Old Mission Capital LLC
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—
Each fund name links to that filer's expert page. Share counts and per-fund weights are pending the 13F ingest fix (portfolios_expertholding.units is currently mis-populated — see the same caveat on the fund detail page's holdings table). Quarter-over-quarter delta ships with the metrics pipeline.
Smart Money · top-200 alpha cohort
12 holders · Q1 202601
WINTON GROUP Ltd
0.73% NEW
α +27.0pts
02
Erste Asset Management GmbH
0.33% NEW
α +33.4pts
03
Caption Management, LLC
0.24% NEW
α +15.5pts
04
ADAR1 Capital Management, LLC
0.16% held
α +74.0pts
05
Voloridge Investment Management, LLC
0.05% held
α +15.5pts
06
Citigroup Inc.
0.04% held
α +26.3pts
07
Bellevue Group AG
0.04% held
α +12.2pts
08
New Age Alpha Advisors, LLC
0.03% held
α +10.8pts
09
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
0.00% held
α +27.5pts
10
Connor, Clark & Lunn Investment Management Ltd.
0.00% held
α +12.3pts
11
Quarry LP
0.00% held
α +10.6pts
12
Nisa Investment Advisors, LLC
0.00% held
α +16.6pts
Smart Money shows holdings from our Top-Performer cohort — the 200 highest-alpha manager_13f funds in our universe. Position weight (current quarter) and QoQ delta versus prior quarter. α is the manager's annual alpha vs benchmark.
Insider activity · last 90 days
18 transactions · 5 filersTransaction codes: P open-market purchase · S sale · M option exercise · A grant · F tax-withhold sale. Insider names link to each individual's expert page.
Congress trades · last 90 days
1 disclosures · STOCK ActConvergence · Pattern Engine ships in v1.1
30-day windowIn development
Convergence detection for $MASI lands with the Pattern Engine.
Once the Pattern Engine ships, this section will surface every active convergence event involving $MASI — the institutional managers and Congress members on the same name, the 30-day window, and the combined position size.
Source data: SEC EDGAR · 13F-HR · Form 4 · CapitolTrades · Last refreshed 09:51 UTC.