Stock Analysis
Data Source: SEC EDGAR 13F
Updated Hourly

MASIMO CORP (MASI)

368 + Investors. Track Smart Money conviction in MASI. See who's accumulating, reducing, or initiating positions.

Current Price
-- USD
Analyst Target
-- (0 analysts)
Upside
0.00%
Net Flow Q/Q
↑ +38
Streak
1Q ▲
Buyers last Q
52%

Smart Money Signals — MASI

Based on 362 hedge funds · latest filing: 2025 Q4 · updated quarterly

📈

Buying streak — 1 quarter in a row

last 6Q
For 1 consecutive quarter, more hedge funds added MASI than sold it. That's a consistent pattern of professional buying — not a one-time trade. When institutions keep buying quarter after quarter, it usually means they see a multi-year opportunity, not just a short-term momentum flip.
🏔️

At the ownership peak (95% of max)

95% of all-time peak
362 hedge funds hold MASI right now — the highest count in 3.0 years. When ownership is this concentrated, any bad news can trigger a chain reaction: one big fund sells, others follow. This is a classic 'crowded trade' — high popularity doesn't equal safety.
📶

Steady growth — +8% more funds vs a year ago

fund count last 6Q
+26 new funds entered over the past year (+8% YoY). Gradual, steady growth in institutional ownership is generally a healthy signal — not a speculative rush, but consistent conviction.
🟡

Slight buying edge — 52% buying

184 buying173 selling
Last quarter: 184 funds bought or added vs 173 that reduced or exited. It's nearly a 50/50 split — some institutions are convinced, others are taking profits. This mixed picture is normal near price highs.
📈

More new buyers each quarter (+44 vs last Q)

new funds entering per quarter
Funds opening a new MASI position: 76 → 45 → 45 → 89. A growing influx of new institutional buyers means the asset is still gathering momentum — the consensus hasn't fully saturated yet.
🔒

67% of holders stayed for 2+ years

■ 67% conviction (2yr+) ■ 16% medium ■ 17% new
243 out of 362 hedge funds have held MASI for over 2 years without selling. Long-term investors are generally harder to shake out during market stress, creating a stable ownership base that limits the risk of sudden capitulation.
📈

Growing discovery — still being found

58 → 76 → 45 → 45 → 89 new funds/Q
New funds entering each quarter: 76 → 45 → 45 → 89. A growing number of institutions are discovering MASI each quarter. The narrative is still spreading — leaving room for ongoing capital accumulation.
🏛️

Deep conviction — 73% of holders stayed 2+ years

■ 73% veterans ■ 7% 1-2yr ■ 20% new
Of 368 current holders: 267 (73%) have held for over 2 years without selling. These are not momentum buyers — they have lived through drawdowns and stayed. A large veteran base acts as a stabilizing force during selloffs.
🏆

Elite ownership — 48% AUM from top-100 funds

48% from top-100 AUM funds
42 of 362 holders are among the 100 largest funds by AUM, controlling 48% of total institutional value in MASI. When the biggest players dominate the cap table, it signifies deep institutional support — since mega-funds deploy the most rigorous due diligence and capital.
3.2
out of 10
Low Exit Risk
Exit risk score 3.2/10 — low institutional crowding. Ownership is below peak levels, holder base is relatively sticky, and buying momentum is positive.

Methodology note: these Smart Money cards use consecutive 13F disclosure snapshots, not trade-by-trade execution data. "Buying", "selling", "new holders", and "trimmed" refer to quarter-over-quarter changes in reported holders, aggregate shares, or disclosed position values between filings. They are useful for ownership regime analysis and crowding, but they do not imply exact trade timing on the filing date.

Institutional Sentiment Summary — MASI

In 2025 Q4, 184 hedge funds were net buyers of MASI (89 opened a new position, 95 added to an existing one), while 173 reduced or exited (122 trimmed, 51 sold completely) — a 52% buyer ratio, indicating a slight buying edge. 48% of total institutional value in MASI is held by top-100 AUM funds, reflecting elite-tier ownership quality. Net fund flow last quarter: +38 funds (more new holders than closures). Total institutional holders: 362.

Hedge Fund Ownership: MASI

How many hedge funds hold MASI — quarterly history vs. share price
Quarterly hedge fund ownership of MASI vs. share price

Market Analysis: MASI

Analyst Price Targets

Avg. Price Target
--

Analyst Recommendations

Stock Performance

Real-time

Company Profile: MASI

Healthcare Medical Devices

Institutional ownership data sourced from SEC EDGAR Form 13F-HR filings.

Smart Money Signal ?
Broad Consensus, Selective Conviction

Many quality funds hold this stock, but top-tier positions remain relatively small.

55 top-rated funds 0 high-conviction
Consensus
7.6
/ 10
breadth
×
Elite
1.7
/ 10
conviction
Hedge Fund Positioning: MASI
2026 Q1 Stats Unlock in 6 days 368 + Investors

Track Smart Money conviction in MASI. See who's accumulating, reducing, or initiating positions.

Metric All 13F Filers (2025 Q4) Prior (2025 Q3) Change
Funds Holding 368 330 11.52%
13F Shares 53M 55M -3.51%
Total Value $6.92B $8.10B -14.61%
New Positions 89 46 +43
Increased Positions 106 114 -8
Closed Positions 52 66 -14
Reduced Positions 129 122 +7
Total Calls 3 4 -25.0%
Total Puts 4 4 -
PUT/CALL Ratio 1.33 1.0 Bearish

Statistics: MASI

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Valuation Measures Data as of: --

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Enterprise Value --
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Forward P/E --
PEG Ratio (5yr expected) --
Price/Sales (ttm) --
Price/Book (mrq) --
Enterprise Value/Revenue --
Enterprise Value/EBITDA --
Beta (5Y Monthly) --
Short Ratio (Days to Cover) --
Short % of Float --

Financial Highlights

Profitability
Profit Margin --
Return on Assets (ttm) --
Return on Equity (ttm) --
Income Statement & Cash Flow
Revenue (ttm) --
Net Income Avi to Common (ttm) --
Diluted EPS (ttm) --
Total Cash (mrq) --
Total Debt/Equity (mrq) --
Levered Free Cash Flow (ttm) --

Institutional Holders (2026 Q1)

368 + investors

Explore institutional interest and hedge fund ownership dynamics. Analyze portfolio weights, new positions, and conviction trends in MASI. Verified SEC 13F-HR filings.

Top 25 institutional holders of MASI — 2025 Q4 · Source: SEC Form 13F
# Investor % of Portfolio Shares Mkt Value
1 CIBRA Capital Ltd 7.76% 90,376 $16.1M
2 NUANCE INVESTMENTS, LLC 6.07% 244,704 $43.5M
3 LOCKERMAN FINANCIAL GROUP, INC. 3.36% 10,500 $1.9M
4 WILSON ASSET MANAGEMENT (INTERNATIONAL) PTY LTD 3.21% 63,984 $11.4M
5 Versor Investments LP 2.64% 6,058 $1.1M
6 ALPINE ASSOCIATES MANAGEMENT INC. 1.98% 189,000 $33.6M
7 Liontrust Investment Partners LLP 1.21% 627,796 $81.7M
8 Westmount Partners, LLC 1.06% 24,232 $4.3M
9 Magnetar Financial LLC 0.77% 427,081 $76.0M
10 WINTON GROUP Ltd 0.70% 112,783 $20.1M
11 Capricorn Fund Managers Ltd 0.63% 22,811 $4.1M
12 MUFG Securities EMEA plc 0.60% 225,400 $40.1M
13 ABC ARBITRAGE SA 0.56% 23,604 $4.2M
14 Cardinal Capital Management 0.51% 22,132 $3.9M
15 Ground Swell Capital, LLC 0.46% 1,319 $235K
16 NS Partners Ltd 0.33% 42,004 $7.5M
17 Erste Asset Management GmbH 0.33% 200,000 $35.5M
18 CREDIT INDUSTRIEL ET COMMERCIAL 0.32% 23,050 $4.1M
19 Champlain Investment Partners, LLC 0.32% 141,284 $25.1M
20 Eukles Asset Management 0.30% 3,722 $662K
21 B.O.S.S. Retirement Advisors, LLC 0.29% 5,337 $949K
22 WESTFIELD CAPITAL MANAGEMENT CO LP 0.25% 341,229 $60.7M
23 Andina Capital Management, LLC 0.22% 1,420 $253K
24 Hudson Bay Capital Management LP 0.20% 330,679 $58.8M
25 Quantbot Technologies LP 0.20% 27,425 $4.9M
Investor Ownership
History 		% of Portfolio Prev % Rank Conviction Avg Buy Price 13F Score™ 3Y / 7Y Sell Timing Shares Mkt Value Change Change % Source Quarter Filed

Frequently Asked Questions — MASIMO CORP (MASI)

What does the Smart Money Trend signal show for MASI?

Buying streak — 1 quarter in a row: For 1 consecutive quarter, more hedge funds added MASI than sold it. That's a consistent pattern of professional buying — not a one-time trade. When institutions keep buying quarter after quarter, it usually means they see a multi-year opportunity, not just a short-term momentum flip.

What is the institutional breadth score for MASI?

Slight buying edge — 52% buying: Last quarter: 184 funds bought or added vs 173 that reduced or exited. It's nearly a 50/50 split — some institutions are convinced, others are taking profits. This mixed picture is normal near price highs.

What is the fund quality score for MASI holders?

Elite ownership — 48% AUM from top-100 funds: 42 of 362 holders are among the 100 largest funds by AUM, controlling 48% of total institutional value in MASI. When the biggest players dominate the cap table, it signifies deep institutional support — since mega-funds deploy the most rigorous due diligence and capital.

How long have hedge funds held MASI?

67% of holders stayed for 2+ years: 243 out of 362 hedge funds have held MASI for over 2 years without selling. Long-term investors are generally harder to shake out during market stress, creating a stable ownership base that limits the risk of sudden capitulation.

Where does this institutional ownership data come from?

All holdings data is sourced from SEC Form 13F filings, which institutional investment managers with over $100 million in assets are required to submit quarterly. Data is parsed directly from SEC EDGAR.

Disclaimer: The information on this page is for informational purposes only and does not constitute investment advice, a recommendation, or an offer to buy or sell any security. Institutional holdings data is sourced from SEC Form 13F filings and reflects positions as of the filing date. Past performance of any fund or portfolio is not indicative of future results. 13Foresight is not a registered investment adviser. Always conduct your own due diligence before making investment decisions.