Arrowstreet Capital’s Masimo MASI Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $30.7M | Buy |
+172,588
| New | +$27.1M | 0.02% | 631 |
|
|
2023
Q3 | – | Sell |
-114,460
| Closed | -$18.8M | – | 1346 |
|
|
2023
Q2 | $18.8M | Buy |
114,460
+5,149
| +5% | +$896K | 0.02% | 403 |
|
|
2023
Q1 | $20.2M | Buy |
109,311
+23,082
| +27% | +$3.89M | 0.03% | 412 |
|
|
2022
Q4 | $12.8M | Buy |
86,229
+327
| +0.4% | +$45K | 0.02% | 474 |
|
|
2022
Q3 | $12.1M | Sell |
85,902
-34,133
| -28% | -$4.99M | 0.02% | 485 |
|
|
2022
Q2 | $15.7M | Sell |
120,035
-109,103
| -48% | -$14.6M | 0.02% | 417 |
|
|
2022
Q1 | $33.3M | Buy |
229,138
+86,631
| +61% | +$16.6M | 0.04% | 324 |
|
|
2021
Q4 | $41.7M | Sell |
142,507
-38,270
| -21% | -$10.9M | 0.05% | 320 |
|
|
2021
Q3 | $48.9M | Buy |
180,777
+8,300
| +5% | +$2.25M | 0.06% | 324 |
|
|
2021
Q2 | $41.8M | Buy |
172,477
+56,152
| +48% | +$12.8M | 0.05% | 371 |
|
|
2021
Q1 | $26.7M | Buy |
116,325
+55,585
| +92% | +$14M | 0.04% | 480 |
|
|
2020
Q4 | $16.3M | Buy |
+60,740
| New | +$15.1M | 0.02% | 669 |
|
|
2020
Q2 | – | Sell |
-7,700
| Closed | -$1.36M | – | 2390 |
|
|
2020
Q1 | $1.36M | Buy |
7,700
+6,300
| +450% | +$1.08M | ﹤0.01% | 1205 |
|
|
2019
Q4 | $221K | Sell |
1,400
-31,586
| -96% | -$4.75M | ﹤0.01% | 1609 |
|
|
2019
Q3 | $4.91M | Sell |
32,986
-127,379
| -79% | -$19.3M | 0.01% | 713 |
|
|
2019
Q2 | $23.9M | Sell |
160,365
-12,803
| -7% | -$1.76M | 0.05% | 324 |
|
|
2019
Q1 | $23.9M | Buy |
+173,168
| New | +$21.7M | 0.06% | 318 |
|
|
2018
Q2 | – | Sell |
-75,363
| Closed | -$6.63M | – | 1221 |
|
|
2018
Q1 | $6.63M | Sell |
75,363
-921,710
| -92% | -$80.3M | 0.02% | 522 |
|
|
2017
Q4 | $84.6M | Sell |
997,073
-114,440
| -10% | -$9.93M | 0.2% | 121 |
|
|
2017
Q3 | $96.2M | Sell |
1,111,513
-1,600
| -0.1% | -$141K | 0.26% | 96 |
|
|
2017
Q2 | $101M | Buy |
1,113,113
+38,991
| +4% | +$3.58M | 0.31% | 91 |
|
|
2017
Q1 | $100M | Buy |
+1,074,122
| New | +$88.4M | 0.37% | 66 |
|
|
2016
Q4 | – | Sell |
-574,265
| Closed | -$34.2M | – | 2172 |
|
|
2016
Q3 | $34.2M | Buy |
574,265
+272,694
| +90% | +$15.4M | 0.11% | 182 |
|
|
2016
Q2 | $15.8M | Buy |
301,571
+81,742
| +37% | +$3.85M | 0.05% | 321 |
|
|
2016
Q1 | $9.2M | Sell |
219,829
-68,399
| -24% | -$2.57M | 0.04% | 389 |
|
|
2015
Q4 | $12M | Buy |
288,228
+8,495
| +3% | +$347K | 0.06% | 318 |
|
|
2015
Q3 | $10.8M | Buy |
279,733
+171,771
| +159% | +$7.02M | 0.05% | 325 |
|
|
2015
Q2 | $4.18M | Buy |
+107,962
| New | +$3.87M | 0.02% | 473 |
|
|
2014
Q4 | – | Sell |
-128,089
| Closed | -$2.73M | – | 1294 |
|
|
2014
Q3 | $2.73M | Sell |
128,089
-203,479
| -61% | -$4.65M | 0.01% | 528 |
|
|
2014
Q2 | $7.83M | Buy |
331,568
+180,228
| +119% | +$4.47M | 0.04% | 341 |
|
|
2014
Q1 | $4.13M | Buy |
+151,340
| New | +$4.32M | 0.03% | 483 |
|
Other funds holding MASI
PCM
PCM
HI
VCM
VPM
Arrowstreet Capital's MASI Position: Q1 2026 in Review
Arrowstreet Capital opened a new position in Masimo (MASI) in Q1 2026: 172,588 shares worth $30.7M. The stake represents 0.02% of the portfolio and ranks #631 among its holdings. This is a return to the name: Arrowstreet Capital previously reported a position in MASI as recently as Q2 2023.
Arrowstreet Capital first reported a position in MASI in Q1 2014 and has held it in 31 quarters since. The position peaked at $101M in Q2 2017. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.
- Arrowstreet Capital held 172,588 shares of Masimo worth $30.7M as of Q1 2026.
- Masimo was a new Arrowstreet Capital position in Q1 2026.
- Masimo made up 0.02% of Arrowstreet Capital's portfolio in Q1 2026, its #631 holding.
- Arrowstreet Capital first reported a position in Masimo in Q1 2014 and has held it in 31 quarters since.
- Arrowstreet Capital's Masimo position peaked at $101M in Q2 2017.
- 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.
Based on Arrowstreet Capital's 13F filing for Q1 2026, filed 14 May 2026.