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Among the 1 tracked institutional investors we monitor, MASI (MASIMO CORP) is held with a combined value of $565.60M across 4,348,786 shares. The largest holder is VANGUARD GROUP INC with a position worth $565.60M. 1 fund reduced its position.
Total Institutional Value
$565.60M
Total Shares Held
4,348,786
Institutional Holders
1
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
None this quarter.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | $565.60M | 0.01% | -9.6% |
SEC Schedule 13D (activist) and 13G (passive) filings for MASI. Filed when an investor acquires 5%+ ownership.
| Member | Type | Date |
|---|---|---|
| Kevin Hern | Sell | Sep 26, 2025 |
| Thomas R Tillis | Sell | Feb 13, 2015 |
As of the latest SEC 13F filings, VANGUARD GROUP INC is the largest institutional holder of MASI with a position worth $565.60M, representing 0.01% of their portfolio. In total, 1 institutional investors hold MASI with a combined value of $565.60M.
Institutional investors hold $565.60M worth of MASI stock across 1 positions. The largest institutional holder is VANGUARD GROUP INC with $565.60M in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For MASI, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their MASI positions.