Masimo
MASI
MASI was delisted on the 9th of June, 2026.
489 hedge funds and large institutions have $12.4B invested in Masimo in 2020 Q4 according to their latest regulatory filings, with 78 funds opening new positions, 183 increasing their positions, 146 reducing their positions, and 43 closing their positions.
97% more call options, than puts
Call options by funds: $38.6M | Put options by funds: $19.6M
81% more first-time investments, than exits
New positions opened: 78 | Existing positions closed: 43
25% more repeat investments, than reductions
Existing positions increased: 183 | Existing positions reduced: 146
15% more capital invested
Capital invested by funds: $10.7B → $12.4B (+$1.64B)
7% more funds holding
Funds holding: 457 → 489 (+32)
0.98% more ownership
Funds ownership: 82.86% → 83.84% (+0.98%)
14% less funds holding in top 10
Funds holding in top 10: 7 → 6 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
+$104M |
| 2 |
OCBV
Ownership Capital B.V.
Amsterdam,
Netherlands
|
+$95.2M |
| 3 |
CTA
Carillon Tower Advisers
St. Petersburg,
Florida
|
+$75.9M |
| 4 |
APG Asset Management
Amsterdam,
Netherlands
|
+$44.5M |
| 5 |
MC
Martin Currie
Edinburgh,
United Kingdom
|
+$43.4M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
-$154M |
| 2 |
American Century Companies
Kansas City,
Missouri
|
-$101M |
| 3 |
Wellington Management Group
Boston,
Massachusetts
|
-$99.3M |
| 4 |
Victory Capital Management
San Antonio,
Texas
|
-$63.1M |
| 5 |
Wells Fargo
San Francisco,
California
|
-$19.7M |
MASI Hedge Fund Activity: Q4 2020 in Review
489 of the 5,652 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q4 2020, worth a combined $12.4B — up 15% from $10.7B a quarter earlier.
Buyers outnumbered sellers: 78 funds opened new MASI positions and 43 closed out — a net gain of 35 holders — while 183 added to existing stakes and 146 trimmed.
The largest buyer was BlackRock, adding an estimated $104M. The largest seller was Fidelity Investments, cutting an estimated $154M.
- 489 institutional investors held Masimo (MASI) as of Q4 2020, up from 457 in Q3 2020.
- Funds reported $12.4B of Masimo stock for Q4 2020, up 15% quarter-over-quarter.
- 78 funds opened new Masimo positions in Q4 2020 and 43 closed out, a net change of +35 holders.
- The largest Masimo buyer in Q4 2020 was BlackRock, an estimated $104M added.
- The largest Masimo seller in Q4 2020 was Fidelity Investments, an estimated $154M sold.
Based on aggregated 13F filings for Q4 2020.