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11 /100
LOW RISK
Score updated Jul 28, 2026

MASI — Masimo Corporation Dilution Risk Tracker

Track MASI dilution risk with DilutionWatch's stock tracker. DilutionScore™ measures dilution risk across 5 factors — lower scores indicate higher risk of share dilution.

⚠️ Not financial advice. Do your own research before making any investment decisions.

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As of July 28, 2026, Masimo Corporation (MASI) has a DilutionWatch DilutionScore of 11/100, rated LOW dilution risk. Masimo Corporation has a market capitalization of $9.35B, 52.37M shares outstanding, 451 institutional holders tracked. Key dilution vectors include approximately 999 months of cash runway.

Source: DilutionWatch (dilutionwatch.com) — data updated daily from SEC EDGAR filings. Not financial advice.

Score Breakdown

📋 Offering Ability
20
💰 Cash Runway
0
📊 Float Risk
10
⚠️ Warrant Exposure
15
🔄Convertible Debt

Dilution Forecast

☀️
Clear
No significant dilution signals
0%
No significant dilution signals detected for MASI.
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Market Data

Market Cap$9.35B
Shares Outstanding52.37M
Float44.31M
Cash$124.60M
Debt$452.00M
Short InterestN/A

Institutional Holdings

QoQ: ↑ 8.2% shares (2026Q1 vs prior)
451 institutional holders · 61.23M shares
#1 BlackRock, Inc. 4.64M shares
#2 Politan Capital Management LP 4.59M shares
#3 VANGUARD CAPITAL MANAGEMENT LLC 4.10M shares
+ 17 more holders Sign up free to view →

Short Interest

Short Interest3.73M
Days to Cover4.3
% of Float8.4%
FINRA data as of May 15, 2026

Recent SEC Activity

4 INSIDER TRANSACTION 2026-03-16
4 INSIDER TRANSACTION 2026-03-16
4 INSIDER TRANSACTION 2026-03-13
4 INSIDER TRANSACTION 2026-03-10
4 INSIDER TRANSACTION 2026-03-10
Full SEC filing analysis available with free account

Recent News

No recent news

What This Means for MASI Shareholders

Masimo Corporation (MASI) has a DilutionScore of 11/100, rated Low dilution risk. At this score level, DilutionWatch's real-time EDGAR monitoring shows limited near-term dilution signals. This does not mean zero dilution risk — shelf registrations can be filed and activated quickly — but the current filing profile shows no major outstanding dilution programs. Score as of July 28, 2026.

DilutionWatch's EDGAR monitoring for MASI shows no major active dilution programs at this time. The primary risk categories — shelf registration capacity, ATM programs, warrant overhang, and cash runway — are each within normal ranges for a company of this profile. This can change quickly if a new S-3 or Form S-1 is filed.

DilutionWatch tracks over 25 SEC filing types for MASI in real-time, scanning EDGAR every 60 seconds. The DilutionWatch shows real-time score changes for MASI alongside comparable low-risk stocks. Not financial advice — this analysis is for informational purposes only.

Understanding MASI's Dilution Risk Factors

Primary Risk Drivers

The highest-scoring factors for MASI are Offering Ability, Warrant Exposure, and Convertible Note Risk. These factors reflect the company's capacity to issue new shares or convert existing instruments into shares, which can increase the total number of outstanding shares. Offering Ability indicates the potential for future equity offerings, which can dilute existing shareholders. Warrant Exposure and Convertible Note Risk relate to instruments that may convert into shares under certain conditions, such as a drop in stock price or a specific trigger event. These mechanisms can lead to dilution by increasing the number of shares without a corresponding increase in company value.

Factors Currently Not a Concern

The Cash Runway and Float Risk factors are currently low-risk. A Cash Runway score of 0 means the company has ample cash with no near-term concern, which reduces the likelihood of needing to raise capital through dilutive means. Float Risk is also low, indicating that the number of shares available for trading is not a current concern. However, if the company were to experience a significant cash shortfall or if the float were to increase substantially due to insider transactions or new share issuances, these factors could become more significant.

SEC Filings to Watch

Specific filings to monitor include S-3, which signals a potential future offering; 424B5, which is used for prospectus supplements and may indicate additional share issuance; 8-K Item 1.01, which could disclose material events like a new offering or conversion of instruments; and 10-Q, which provides quarterly financial updates and may reveal changes in the company's capital structure or liquidity.

How Dilution Happens

Dilution occurs when new shares are issued or existing instruments convert into shares. For example, if MASI issues new shares through an offering, the total number of shares increases, reducing the ownership percentage of existing shareholders. Similarly, if warrants or convertible notes are exercised, they can convert into shares, further increasing the total share count. This process reduces the value of each existing share and can negatively impact returns for current shareholders.

What Would Make This Worse

A significant deterioration in MASI's financial position, such as a cash shortfall or a drop in stock price, could trigger the conversion of warrants or convertible notes. This would lead to a large increase in the number of shares outstanding. Additionally, a new equity offering or increased insider selling could further elevate dilution risk. These events could create a feedback loop where dilution leads to lower stock prices, which in turn may trigger more conversions or offerings, worsening the dilution risk profile.

Key Insight

While MASI currently has low dilution risk, future changes in its capital structure or liquidity could increase the likelihood of dilution through new share issuances or instrument conversions.

How to Monitor MASI for Dilution Risk

What This Risk Level Means

A DilutionScore of 11/100 indicates that Masimo Corporation (MASI) currently presents a very low risk of dilution. For a mid-cap large-cap operating company, this suggests that the company is not currently engaging in activities that would significantly increase the number of outstanding shares, such as frequent equity offerings, warrant exercises, or large-scale stock repurchases. The company's capital structure is likely stable, and it is not under significant pressure to raise additional equity capital.

What Typically Happens Next

Companies with low DilutionScores generally remain stable unless there is a material change in their capital structure. However, watch for potential dilution events such as shelf registrations, ATM programs, or the exercise of warrants. These actions can increase share count and dilute existing shareholders. While not common for companies with low risk scores, such events can occur during periods of financial stress, strategic expansion, or in response to market conditions.

Watch For

Any sudden increase in share count or the filing of new equity-related documents.

Monitoring Playbook

To monitor MASI for dilution risk, use DilutionWatch to track the company’s DilutionScore over time. Set up alerts for any score increase above 30/100, as this may indicate a worsening risk profile. Check the score at least monthly, or more frequently if there are signs of capital activity. When thresholds are hit, review the Shelf & ATM Monitor to identify any new equity offerings or ATM programs.

Early Warning Signals

  • A sudden increase in the DilutionScore above 30/100, indicating a potential rise in dilutive activity.
  • Filing of a new shelf registration or ATM program, which can signal future dilution.
  • Exercise of warrants or conversion of convertible securities, which increases outstanding shares.

What a Positive Resolution Looks Like

A positive resolution would involve actions that reduce the risk of dilution, such as the completion of a capital raise that strengthens the balance sheet, the paydown of debt, or the expiry of outstanding warrants without exercise. These actions would likely lead to a decrease in the DilutionScore and a more stable capital structure over time.

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