Masimo Corporation· MASI

🇺🇸 US · MidBroad USNASDAQ

HealthcareMedical - DevicesWebsite

Price: $179.95
Day: 0.00%
Mkt Cap: $9.42B
52W Range: $125.94 – $179.99
Volume: 0
Beta: 1.18

D55D FrameworkQuarterly Data

Holdings Analysis

Insider activity, institutional flows, and fund ownership.

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stockoscope.com

Masimo Corporation

MASI|Healthcare|Medical - Devices

Current price: $180

Smart Money

Dimension 5 of 5

Insider Activity, Q1 2026

Latest scored quarter, net flow, and top transactions by value

Net dollar flow-$2.6M

Net share flow-18.7K

Purchases0 ($0)

Sales3 ($2.6M)

Top Notable Transactions

Insider

Type

Value

Date

KIANI JOE E

Sale

$23.2M

Dec 3

KIANI JOE E

Sale

$22.4M

Apr 17

KIANI JOE E

Sale

$21.5M

Apr 16

Institutional Ownership, Q1 2026

Ownership share, position changes, share flow, and top holders

Ownership99.8%

13F share flow+24.1%

Investors holding465

+412 adding-183 reducing

135

277

108

New 135Inc 277Red 108Closed 75

Top Institutional Holders

Institution

Value

Change

BLACKROCK, INC.

$826.1M

-47.2%

POLITAN CAPITAL MANAGEMENT LP

$816.4M

+0.7%

PENTWATER CAPITAL MANAGEMENT LP

$564.9M

+100.0%

BARCLAYS PLC

$488.1M

+4637.1%

ETF & Mutual Fund Activity, Q2 2026

Latest meaningful quarter: fund-by-fund buying / unchanged / selling

Funds reporting200

Total shares held12.5M

Share flow-26.8%

28 buying38 selling

134

Buying 28Unchanged 134Selling 38

Top Fund Holders

Fund

Weight

Change

AMCAP FUND

1.2M

24.22%

FIDELITY SELECT PORTFOLIOS

560.0K

1.01%

VANGUARD SCOTTSDALE FUNDS

85.7K

0.00%

-271

Invesco Exchange-Traded Fund Trust II

14.0K

0.00%

-2.9K

See the complete picture

The full 5D Framework: Business Quality · Peer Comparison · Valuation · Analyst Sentiment · Smart Money

Explore MASI on stockoscope.com→

Generated August 6, 2026

For educational purposes only. Not financial advice. Data may be delayed or incomplete.

Smart Money Sentiment

MASI Smart Money Sentiment Score

A weighted 1-5 sentiment score across three smart money signals.

Smart Money

3.2/5

Neutral

Weighted across 3 components

Component Breakdown (3 of 3 available)

Insider Activity

40% weight

-21

Institutional Flow

50% weight

+36

Fund Flow

10% weight

-25

Overall Smart Money sentiment of 3.2/5 (Neutral) based on a weighted combination of 3 components. Insider activity uses a relative-baseline comparison against the stock's own history; institutional flow tracks position momentum and 13F share changes; fund flow measures ETF / mutual-fund buying vs selling. Higher scores indicate stronger bullish sentiment from professional investors.Last updated August 5, 2026.

Insider Trading Activity

Insider trading analysis comparing the latest quarter against the stock's own historical baseline.

Insider Activity for MASI

Net insider share flow by quarter (C-suite & director purchases minus sales)

Bearish Signal

Elevated insider selling in Q1 2026

3 sales totaling $2.6M (18.7K shares)

Share volume is elevated at 2.2x the historical average

Buying seen in 1 of 7 quarters

Notable Recent Transactions, MASI

Top 8 highest-value recent insider trades

KIANI JOE E

CEO

Sell

88,312 shares at $263.13

Dec 3, 2020$23.24M

KIANI JOE E

CEO

Sell

111,468 shares at $200.70

Apr 17, 2020$22.37M

KIANI JOE E

CEO

Sell

105,318 shares at $204.13

Apr 16, 2020$21.50M

KIANI JOE E

CEO

Sell

112,578 shares at $190.44

Apr 14, 2020$21.44M

KIANI JOE E

CEO

Sell

55,971 shares at $270.68

Dec 8, 2020$15.15M

KIANI JOE E

CEO

Sell

52,698 shares at $281.93

Jan 8, 2021$14.86M

KIANI JOE E

CEO

Sell

71,878 shares at $200.57

Apr 15, 2020$14.42M

KIANI JOE E

CEO

Sell

52,492 shares at $250.87

Oct 7, 2020$13.17M

Institutional Ownership Analysis

Institutional ownership analysis with position momentum, 13F share flow, and ownership percentage trends.

Institutional Ownership Over Time for MASI

Total dollar value invested by institutions each quarter

Bullish Signal

Institutions accumulating in Q1 2026

99.8% institutional ownership

Strong accumulation: 412 institutions adding vs 183 reducing positions

13F shares decreased by 3.5%, a notable change

Momentum improving from prior quarter

Position Changes

Q1 2026: how are institutions adjusting their positions?

+412 growing-183 shrinkingNet: +229

135

277

108

New (135)

Increased (277)

Reduced (108)

Closed (75)

Top Institutional Holders, MASI

Largest 8 institutional positions by ownership percentage as of Q2 2026

CARDINAL CAPITAL MANAGEMENT

Ownership

0.00%

-100.0%

WEALTH ENHANCEMENT ADVISORY SERVICES, LLC

Ownership

0.00%

-100.0%

MERIT FINANCIAL GROUP, LLC

Ownership

0.00%

-100.0%

MERIT FINANCIAL GROUP, LLC

Ownership

0.00%

-100.0%

NELSON, VAN DENBURG & CAMPBELL WEALTH MANAGEMENT GROUP, LLC

Ownership

0.00%

-100.0%

JFS WEALTH ADVISORS, LLC

Ownership

0.00%

-100.0%

PRIVATE ADVISOR GROUP, LLC

Ownership

0.00%

-100.0%

CROSSMARK GLOBAL HOLDINGS, INC.

Ownership

0.00%

-100.0%

ETF and Mutual Fund Holdings

ETF and mutual fund activity breakdown showing buying vs selling funds, top fund holders, and detailed holdings.

Fund Activity

Q2 2026: 200 ETFs and mutual funds reporting

28 buying38 sellingNet: -10

134

Buying (28)

Unchanged (134)

Selling (38)

Bearish Signal

Funds distributing in Q2 2026

200 ETFs and mutual funds reporting

38 funds selling vs 28 buying

Top Fund Holders, MASI

Largest 8 ETF and mutual fund positions by shares held as of latest filing

AMCAP FUND

1.2M

Weight

24.22%

No change

FIDELITY SELECT PORTFOLIOS

560.0K

Weight

1.01%

No change

VANGUARD SCOTTSDALE FUNDS

85.7K

Weight

0.00%

Decreased

Invesco Exchange-Traded Fund Trust II

14.0K

Weight

0.00%

Decreased

PUTNAM GLOBAL HEALTH CARE FUND

9.5K

Weight

1.74%

No change

SEI INSTITUTIONAL INVESTMENTS TRUST

8.9K

Weight

0.00%

Increased

VANGUARD WELLINGTON FUND

8.7K

Weight

0.00%

No change

Global X Funds

5.7K

Weight

0.01%

Decreased

Masimo Corporation· MASI

Holdings Analysis

Insider Trading Activity

1.3Transaction History94Real market purchases and sales onlyShow All Types

Institutional Ownership Analysis

2.4Detailed Holdings98Most recent institutional positions with changes and valuations

ETF and Mutual Fund Holdings

3.3Fund Holdings Details25Most recent ETF and mutual fund holdings with share counts and weights

Search stocks

Holdings Analysis

Insider Trading Activity

1.3Transaction History94Real market purchases and sales onlyShow All Types

Institutional Ownership Analysis

2.4Detailed Holdings98Most recent institutional positions with changes and valuations

ETF and Mutual Fund Holdings

3.3Fund Holdings Details25Most recent ETF and mutual fund holdings with share counts and weights