Masimo
MASI
MASI was delisted on the 9th of June, 2026.
457 hedge funds and large institutions have $10.7B invested in Masimo in 2020 Q3 according to their latest regulatory filings, with 58 funds opening new positions, 157 increasing their positions, 169 reducing their positions, and 70 closing their positions.
89% more call options, than puts
Call options by funds: $61.4M | Put options by funds: $32.5M
17% more funds holding in top 10
Funds holding in top 10: 6 → 7 (+1)
3% more capital invested
Capital invested by funds: $10.4B → $10.7B (+$325M)
7% less repeat investments, than reductions
Existing positions increased: 157 | Existing positions reduced: 169
1.64% less ownership
Funds ownership: 84.5% → 82.86% (-1.6%)
3% less funds holding
Funds holding: 472 → 457 (-15)
17% less first-time investments, than exits
New positions opened: 58 | Existing positions closed: 70
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
WRF
Waddell & Reed Financial
Overland Park,
Kansas
|
+$115M |
| 2 |
CS
Credit Suisse
Zurich,
Switzerland
|
+$108M |
| 3 |
BlackRock
New York
|
+$103M |
| 4 |
California Public Employees Retirement System
Sacramento,
California
|
+$70.6M |
| 5 |
BNP Paribas Asset Management
Paris,
France
|
+$68.8M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
-$149M |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
-$123M |
| 3 |
CTA
Carillon Tower Advisers
St. Petersburg,
Florida
|
-$69.4M |
| 4 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$57.8M |
| 5 |
Bank of Nova Scotia
Toronto,
Ontario, Canada
|
-$48.1M |
MASI Hedge Fund Activity: Q3 2020 in Review
457 of the 4,957 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q3 2020, worth a combined $10.7B — up 3.1% from $10.4B a quarter earlier.
Sellers outnumbered buyers: 70 funds closed out of MASI and 58 opened new positions — a net loss of 12 holders — while 169 trimmed existing stakes and 157 added.
The largest buyer was Waddell & Reed Financial, opening a new position worth an estimated $115M. The largest seller was Fidelity Investments, cutting an estimated $149M.
- 457 institutional investors held Masimo (MASI) as of Q3 2020, down from 472 in Q2 2020.
- Funds reported $10.7B of Masimo stock for Q3 2020, up 3.1% quarter-over-quarter.
- 58 funds opened new Masimo positions in Q3 2020 and 70 closed out, a net change of -12 holders.
- The largest Masimo buyer in Q3 2020 was Waddell & Reed Financial, an estimated $115M added.
- The largest Masimo seller in Q3 2020 was Fidelity Investments, an estimated $149M sold.
Based on aggregated 13F filings for Q3 2020.