Masimo
MASI
MASI was delisted on the 9th of June, 2026.
392 hedge funds and large institutions have $6.63B invested in Masimo in 2019 Q3 according to their latest regulatory filings, with 49 funds opening new positions, 112 increasing their positions, 169 reducing their positions, and 40 closing their positions.
300% more funds holding in top 10
Funds holding in top 10: 1 → 4 (+3)
23% more first-time investments, than exits
New positions opened: 49 | Existing positions closed: 40
2% more funds holding
Funds holding: 385 → 392 (+7)
0.34% less ownership
Funds ownership: 83.96% → 83.62% (-0.34%)
0% less call options, than puts
Call options by funds: $7.84M | Put options by funds: $7.87M
0% less capital invested
Capital invested by funds: $6.66B → $6.63B (-$29.4M)
34% less repeat investments, than reductions
Existing positions increased: 112 | Existing positions reduced: 169
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
EAM
Eagle Asset Management
St Petersburg,
Florida
|
+$61.3M |
| 2 |
Wellington Management Group
Boston,
Massachusetts
|
+$58.7M |
| 3 |
Bank of New York Mellon
New York
|
+$54.7M |
| 4 |
CTA
Carillon Tower Advisers
St. Petersburg,
Florida
|
+$45.7M |
| 5 |
OCBV
Ownership Capital B.V.
Amsterdam,
Netherlands
|
+$39.9M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
AQR Capital Management
Greenwich,
Connecticut
|
-$60.5M |
| 2 |
Renaissance Technologies
New York
|
-$25.7M |
| 3 |
N
Natixis
Paris,
France
|
-$23.8M |
| 4 |
BTW
Boston Trust Walden
Boston,
Massachusetts
|
-$21.6M |
| 5 |
Arrowstreet Capital
Boston,
Massachusetts
|
-$19.3M |
MASI Hedge Fund Activity: Q3 2019 in Review
392 of the 4,561 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q3 2019, worth a combined $6.63B — down 0.44% from $6.66B a quarter earlier.
Buyers outnumbered sellers: 49 funds opened new MASI positions and 40 closed out — a net gain of 9 holders — while 112 added to existing stakes and 169 trimmed.
The largest buyer was Eagle Asset Management, adding an estimated $61.3M. The largest seller was AQR Capital Management, cutting an estimated $60.5M.
- 392 institutional investors held Masimo (MASI) as of Q3 2019, up from 385 in Q2 2019.
- Funds reported $6.63B of Masimo stock for Q3 2019, down 0.44% quarter-over-quarter.
- 49 funds opened new Masimo positions in Q3 2019 and 40 closed out, a net change of +9 holders.
- The largest Masimo buyer in Q3 2019 was Eagle Asset Management, an estimated $61.3M added.
- The largest Masimo seller in Q3 2019 was AQR Capital Management, an estimated $60.5M sold.
Based on aggregated 13F filings for Q3 2019.