Morgan Stanley’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 | $134M | Sell |
752,417
-168,318
| -18% | -$26.4M | 0.01% | 1208 |
|
|
2025
Q4 | $120M | Buy |
920,735
+230,134
| +33% | +$33M | 0.01% | 1289 |
|
|
2025
Q3 | $102M | Sell |
690,601
-76,774
| -10% | -$11.6M | 0.01% | 1392 |
|
|
2025
Q2 | $129M | Buy |
767,375
+31,593
| +4% | +$5.05M | 0.01% | 1140 |
|
|
2025
Q1 | $123M | Sell |
735,782
-2,059
| -0.3% | -$357K | 0.01% | 1104 |
|
|
2024
Q4 | $122M | Buy |
737,841
+985
| +0.1% | +$156K | 0.01% | 1120 |
|
|
2024
Q3 | $98.2M | Buy |
736,856
+261,053
| +55% | +$30.3M | 0.01% | 1255 |
|
|
2024
Q2 | $59.9M | Buy |
475,803
+4,344
| +0.9% | +$572K | ﹤0.01% | 1583 |
|
|
2024
Q1 | $69.2M | Sell |
471,459
-444,589
| -49% | -$57.4M | 0.01% | 1465 |
|
|
2023
Q4 | $107M | Buy |
916,048
+414,144
| +83% | +$38.6M | ﹤0.01% | 1656 |
|
|
2023
Q3 | $44M | Buy |
501,904
+231,202
| +85% | +$26.9M | ﹤0.01% | 1698 |
|
|
2023
Q2 | $44.5M | Sell |
270,702
-40,558
| -13% | -$7.06M | ﹤0.01% | 1677 |
|
|
2023
Q1 | $57.4M | Sell |
311,260
-171,995
| -36% | -$29M | 0.01% | 1429 |
|
|
2022
Q4 | $71.5M | Sell |
483,255
-212,587
| -31% | -$29.3M | 0.01% | 1239 |
|
|
2022
Q3 | $98.2M | Sell |
695,842
-680,782
| -49% | -$99.5M | 0.01% | 903 |
|
|
2022
Q2 | $180M | Buy |
1,376,624
+886,202
| +181% | +$119M | 0.02% | 634 |
|
|
2022
Q1 | $71.4M | Buy |
490,422
+327,753
| +201% | +$62.9M | 0.01% | 1069 |
|
|
2021
Q4 | $47.6M | Buy |
162,669
+3,183
| +2% | +$906K | 0.01% | 1369 |
|
|
2021
Q3 | $43.2M | Buy |
159,486
+71,836
| +82% | +$19.5M | 0.01% | 1403 |
|
|
2021
Q2 | $21.3M | Sell |
87,650
-45,409
| -34% | -$10.4M | ﹤0.01% | 2078 |
|
|
2021
Q1 | $30.6M | Sell |
133,059
-59,153
| -31% | -$14.9M | ﹤0.01% | 1549 |
|
|
2020
Q4 | $51.6M | Buy |
192,212
+133,769
| +229% | +$33.4M | 0.01% | 1083 |
|
|
2020
Q3 | $13.8M | Sell |
58,443
-19,776
| -25% | -$4.43M | ﹤0.01% | 1761 |
|
|
2020
Q2 | $17.8M | Buy |
78,219
+9,599
| +14% | +$2.11M | ﹤0.01% | 1498 |
|
|
2020
Q1 | $12.2M | Sell |
68,620
-8,122
| -11% | -$1.39M | ﹤0.01% | 1637 |
|
|
2019
Q4 | $12.1M | Buy |
76,742
+5,290
| +7% | +$795K | ﹤0.01% | 2205 |
|
|
2019
Q3 | $10.6M | Buy |
71,452
+4,491
| +7% | +$682K | ﹤0.01% | 2056 |
|
|
2019
Q2 | $9.97M | Sell |
66,961
-180,590
| -73% | -$24.8M | ﹤0.01% | 2166 |
|
|
2019
Q1 | $34.2M | Buy |
247,551
+123,210
| +99% | +$15.5M | 0.01% | 1061 |
|
|
2018
Q4 | $13.3M | Sell |
124,341
-61,917
| -33% | -$6.9M | ﹤0.01% | 1818 |
|
|
2018
Q3 | $23.2M | Sell |
186,258
-171,839
| -48% | -$19.1M | 0.01% | 1544 |
|
|
2018
Q2 | $35M | Sell |
358,097
-222,361
| -38% | -$21.1M | 0.01% | 1136 |
|
|
2018
Q1 | $51M | Buy |
580,458
+79,008
| +16% | +$6.89M | 0.01% | 902 |
|
|
2017
Q4 | $42.5M | Buy |
501,450
+116,653
| +30% | +$10.1M | 0.01% | 1057 |
|
|
2017
Q3 | $33.3M | Buy |
384,797
+202,936
| +112% | +$17.9M | 0.01% | 1173 |
|
|
2017
Q2 | $16.6M | Sell |
181,861
-110,135
| -38% | -$10.1M | 0.01% | 1686 |
|
|
2017
Q1 | $27.2M | Buy |
291,996
+83,564
| +40% | +$6.88M | 0.01% | 1315 |
|
|
2016
Q4 | $14M | Sell |
208,432
-94,787
| -31% | -$5.83M | ﹤0.01% | 1888 |
|
|
2016
Q3 | $18M | Buy |
303,219
+16,999
| +6% | +$959K | 0.01% | 1540 |
|
|
2016
Q2 | $15M | Sell |
286,220
-159,553
| -36% | -$7.51M | 0.01% | 1651 |
|
|
2016
Q1 | $18.7M | Sell |
445,773
-74,633
| -14% | -$2.81M | 0.01% | 1352 |
|
|
2015
Q4 | $21.6M | Buy |
520,406
+15,718
| +3% | +$642K | 0.01% | 1342 |
|
|
2015
Q3 | $19.5M | Buy |
504,688
+104,538
| +26% | +$4.27M | 0.01% | 1404 |
|
|
2015
Q2 | $15.5M | Buy |
400,150
+75,755
| +23% | +$2.71M | 0.01% | 1715 |
|
|
2015
Q1 | $10.7M | Sell |
324,395
-18,249
| -5% | -$525K | ﹤0.01% | 1985 |
|
|
2014
Q4 | $9.03M | Buy |
342,644
+101,362
| +42% | +$2.5M | ﹤0.01% | 2160 |
|
|
2014
Q3 | $5.13M | Sell |
241,282
-77,308
| -24% | -$1.76M | ﹤0.01% | 2617 |
|
|
2014
Q2 | $7.52M | Buy |
318,590
+232,621
| +271% | +$5.77M | ﹤0.01% | 2283 |
|
|
2014
Q1 | $2.35M | Sell |
85,969
-4,428
| -5% | -$126K | ﹤0.01% | 3280 |
|
|
2013
Q4 | $2.64M | Buy |
90,397
+12,187
| +16% | +$341K | ﹤0.01% | 3166 |
|
|
2013
Q3 | $2.08M | Sell |
78,210
-42,884
| -35% | -$1.06M | ﹤0.01% | 3177 |
|
|
2013
Q2 | $2.57M | Buy |
+121,094
| New | +$2.55M | ﹤0.01% | 2946 |
|
Other funds holding MASI
PCM
PCM
HI
VCM
VPM
Morgan Stanley's MASI Position: Q1 2026 in Review
Morgan Stanley reduced its Masimo (MASI) stake by 18% in Q1 2026, selling an estimated $26.4M and leaving 752,417 shares worth $134M. The position accounts for 0.01% of the portfolio, ranked #1208.
Morgan Stanley first reported a position in MASI in Q2 2013 and has held it in 52 quarters since. The position peaked at $180M in Q2 2022. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.
- Morgan Stanley held 752,417 shares of Masimo worth $134M as of Q1 2026.
- Morgan Stanley sold 168,318 Masimo shares in Q1 2026, an estimated $26.4M.
- Masimo made up 0.01% of Morgan Stanley's portfolio in Q1 2026, its #1208 holding.
- Morgan Stanley first reported a position in Masimo in Q2 2013 and has held it in 52 quarters since.
- Morgan Stanley's Masimo position peaked at $180M in Q2 2022.
- 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.
Based on Morgan Stanley's 13F filing for Q1 2026, filed 15 May 2026.