Masimo
MASI
MASI was delisted on the 9th of June, 2026.
400 hedge funds and large institutions have $8.31B invested in Masimo in 2020 Q1 according to their latest regulatory filings, with 62 funds opening new positions, 115 increasing their positions, 159 reducing their positions, and 38 closing their positions.
700% more funds holding in top 10
Funds holding in top 10: 1 → 8 (+7)
93% more call options, than puts
Call options by funds: $23.7M | Put options by funds: $12.3M
63% more first-time investments, than exits
New positions opened: 62 | Existing positions closed: 38
16% more capital invested
Capital invested by funds: $7.16B → $8.31B (+$1.15B)
5% more funds holding
Funds holding: 382 → 400 (+18)
2.29% more ownership
Funds ownership: 84.95% → 87.24% (+2.3%)
28% less repeat investments, than reductions
Existing positions increased: 115 | Existing positions reduced: 159
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Fidelity Investments
Boston,
Massachusetts
|
+$229M |
| 2 |
Victory Capital Management
San Antonio,
Texas
|
+$184M |
| 3 |
William Blair Investment Management
Chicago,
Illinois
|
+$138M |
| 4 |
VNIM
Vaughan Nelson Investment Management
Houston,
Texas
|
+$55.5M |
| 5 |
Wellington Management Group
Boston,
Massachusetts
|
+$43.7M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citigroup
New York
|
-$184M |
| 2 |
Janus Henderson Group
London,
United Kingdom
|
-$108M |
| 3 |
CIP
Champlain Investment Partners
Burlington,
Vermont
|
-$50.1M |
| 4 |
Massachusetts Financial Services
Boston,
Massachusetts
|
-$36.7M |
| 5 |
Prudential Financial
Newark,
New Jersey
|
-$31.8M |
MASI Hedge Fund Activity: Q1 2020 in Review
400 of the 4,539 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q1 2020, worth a combined $8.31B — up 16% from $7.16B a quarter earlier.
Buyers outnumbered sellers: 62 funds opened new MASI positions and 38 closed out — a net gain of 24 holders — while 115 added to existing stakes and 159 trimmed.
The largest buyer was Fidelity Investments, adding an estimated $229M. The largest seller was Citigroup, cutting an estimated $184M.
- 400 institutional investors held Masimo (MASI) as of Q1 2020, up from 382 in Q4 2019.
- Funds reported $8.31B of Masimo stock for Q1 2020, up 16% quarter-over-quarter.
- 62 funds opened new Masimo positions in Q1 2020 and 38 closed out, a net change of +24 holders.
- The largest Masimo buyer in Q1 2020 was Fidelity Investments, an estimated $229M added.
- The largest Masimo seller in Q1 2020 was Citigroup, an estimated $184M sold.
Based on aggregated 13F filings for Q1 2020.