SEI Investments’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 | $2.35M | Buy |
13,195
+5,480
| +71% | +$860K | ﹤0.01% | 1937 |
|
|
2025
Q4 | $1M | Sell |
7,715
-13,940
| -64% | -$2M | ﹤0.01% | 2181 |
|
|
2025
Q3 | $3.2M | Sell |
21,655
-8,851
| -29% | -$1.34M | ﹤0.01% | 1496 |
|
|
2025
Q2 | $5.13M | Sell |
30,506
-18,859
| -38% | -$3.01M | 0.01% | 1259 |
|
|
2025
Q1 | $8.22M | Buy |
49,365
+22,764
| +86% | +$3.95M | 0.01% | 1053 |
|
|
2024
Q4 | $4.4M | Sell |
26,601
-1,481
| -5% | -$234K | 0.01% | 1354 |
|
|
2024
Q3 | $3.74M | Buy |
28,082
+4,488
| +19% | +$521K | ﹤0.01% | 1413 |
|
|
2024
Q2 | $2.97M | Sell |
23,594
-72,048
| -75% | -$9.49M | ﹤0.01% | 1465 |
|
|
2024
Q1 | $14M | Sell |
95,642
-84,986
| -47% | -$11M | 0.02% | 772 |
|
|
2023
Q4 | $21.2M | Sell |
180,628
-3,312
| -2% | -$309K | 0.03% | 545 |
|
|
2023
Q3 | $16.1M | Buy |
183,940
+127,249
| +224% | +$14.8M | 0.03% | 623 |
|
|
2023
Q2 | $9.33M | Buy |
56,691
+14,686
| +35% | +$2.56M | 0.02% | 913 |
|
|
2023
Q1 | $7.75M | Buy |
42,005
+17,434
| +71% | +$2.94M | 0.01% | 984 |
|
|
2022
Q4 | $3.63M | Sell |
24,571
-27,128
| -52% | -$3.73M | 0.01% | 1195 |
|
|
2022
Q3 | $7.3M | Buy |
51,699
+5,245
| +11% | +$766K | 0.02% | 901 |
|
|
2022
Q2 | $6.1M | Buy |
46,454
+7,322
| +19% | +$980K | 0.01% | 998 |
|
|
2022
Q1 | $5.66M | Sell |
39,132
-3,387
| -8% | -$650K | 0.01% | 1037 |
|
|
2021
Q4 | $12.4M | Buy |
42,519
+3,437
| +9% | +$979K | 0.02% | 690 |
|
|
2021
Q3 | $10.6M | Sell |
39,082
-2,434
| -6% | -$660K | 0.02% | 718 |
|
|
2021
Q2 | $10.1M | Sell |
41,516
-3,773
| -8% | -$861K | 0.02% | 732 |
|
|
2021
Q1 | $10.7M | Buy |
45,289
+5,007
| +12% | +$1.26M | 0.03% | 641 |
|
|
2020
Q4 | $10.9M | Sell |
40,282
-2,800
| -6% | -$698K | 0.03% | 591 |
|
|
2020
Q3 | $10.1M | Buy |
43,082
+10,127
| +31% | +$2.27M | 0.03% | 534 |
|
|
2020
Q2 | $7.54M | Buy |
32,955
+4,311
| +15% | +$946K | 0.02% | 678 |
|
|
2020
Q1 | $5.08M | Sell |
28,644
-6,954
| -20% | -$1.19M | 0.02% | 755 |
|
|
2019
Q4 | $5.63M | Sell |
35,598
-18,555
| -34% | -$2.79M | 0.02% | 864 |
|
|
2019
Q3 | $8.02M | Sell |
54,153
-11,119
| -17% | -$1.69M | 0.02% | 698 |
|
|
2019
Q2 | $9.7M | Sell |
65,272
-1,346
| -2% | -$185K | 0.03% | 596 |
|
|
2019
Q1 | $9.21M | Buy |
66,618
+14,236
| +27% | +$1.79M | 0.03% | 578 |
|
|
2018
Q4 | $6.17M | Buy |
52,382
+18,858
| +56% | +$2.1M | 0.02% | 781 |
|
|
2018
Q3 | $4.17M | Sell |
33,524
-14,608
| -30% | -$1.62M | 0.02% | 957 |
|
|
2018
Q2 | $4.7M | Buy |
48,132
+4,418
| +10% | +$420K | 0.02% | 949 |
|
|
2018
Q1 | $3.85M | Buy |
43,714
+15,898
| +57% | +$1.39M | 0.01% | 953 |
|
|
2017
Q4 | $2.36M | Sell |
27,816
-2,605
| -9% | -$226K | 0.01% | 1222 |
|
|
2017
Q3 | $2.63M | Sell |
30,421
-24,931
| -45% | -$2.2M | 0.01% | 1123 |
|
|
2017
Q2 | $5.05M | Sell |
55,352
-5,192
| -9% | -$477K | 0.02% | 837 |
|
|
2017
Q1 | $5.65M | Buy |
60,544
+1,932
| +3% | +$159K | 0.02% | 736 |
|
|
2016
Q4 | $3.95M | Buy |
58,612
+6,827
| +13% | +$420K | 0.02% | 873 |
|
|
2016
Q3 | $3.08M | Buy |
51,785
+1,365
| +3% | +$77K | 0.02% | 907 |
|
|
2016
Q2 | $2.65M | Sell |
50,420
-4,335
| -8% | -$204K | 0.02% | 900 |
|
|
2016
Q1 | $2.29M | Buy |
54,755
+43,775
| +399% | +$1.65M | 0.01% | 923 |
|
|
2015
Q4 | $456K | Sell |
10,980
-3,101
| -22% | -$127K | ﹤0.01% | 1362 |
|
|
2015
Q3 | $543K | Buy |
14,081
+7,770
| +123% | +$317K | 0.01% | 1261 |
|
|
2015
Q2 | $244K | Buy |
6,311
+6,209
| +6,087% | +$222K | ﹤0.01% | 1352 |
|
|
2015
Q1 | $3K | Buy |
102
+93
| +1,033% | +$2.67K | ﹤0.01% | 2088 |
|
|
2014
Q4 | $0 | Buy |
+9
| New | +$222 | ﹤0.01% | 2237 |
|
Other funds holding MASI
PCM
PCM
HI
VCM
VPM
SEI Investments's MASI Position: Q1 2026 in Review
SEI Investments increased its Masimo (MASI) stake by 71% in Q1 2026, buying an estimated $860K and bringing the position to 13,195 shares worth $2.35M. The position accounts for ﹤0.01% of the portfolio, ranked #1937.
SEI Investments first reported a position in MASI in Q4 2014 and has held it in 46 quarters since. The position peaked at $21.2M in Q4 2023. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.
- SEI Investments held 13,195 shares of Masimo worth $2.35M as of Q1 2026.
- SEI Investments bought 5,480 Masimo shares in Q1 2026, an estimated $860K.
- Masimo made up ﹤0.01% of SEI Investments's portfolio in Q1 2026, its #1937 holding.
- SEI Investments first reported a position in Masimo in Q4 2014 and has held it in 46 quarters since.
- SEI Investments's Masimo position peaked at $21.2M in Q4 2023.
- 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.
Based on SEI Investments's 13F filing for Q1 2026, filed 13 May 2026.