Millennium Management’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 | $176M | Buy |
988,853
+800,888
| +426% | +$126M | 0.07% | 241 |
|
|
2025
Q4 | $24.4M | Buy |
187,965
+171,834
| +1,065% | +$24.6M | 0.01% | 1380 |
|
|
2025
Q3 | $2.38M | Buy |
16,131
+12,224
| +313% | +$1.85M | ﹤0.01% | 3880 |
|
|
2025
Q2 | $657K | Sell |
3,907
-130,899
| -97% | -$20.9M | ﹤0.01% | 4711 |
|
|
2025
Q1 | $22.5M | Sell |
134,806
-273,252
| -67% | -$47.4M | 0.01% | 1401 |
|
|
2024
Q4 | $67.5M | Buy |
408,058
+378,805
| +1,295% | +$59.8M | 0.03% | 607 |
|
|
2024
Q3 | $3.9M | Sell |
29,253
-724,490
| -96% | -$84.1M | ﹤0.01% | 3066 |
|
|
2024
Q2 | $94.9M | Buy |
753,743
+406,727
| +117% | +$53.6M | 0.04% | 454 |
|
|
2024
Q1 | $51M | Buy |
347,016
+150,556
| +77% | +$19.4M | 0.02% | 823 |
|
|
2023
Q4 | $23M | Sell |
196,460
-44,741
| -19% | -$4.17M | 0.01% | 1428 |
|
|
2023
Q3 | $21.1M | Buy |
241,201
+22,219
| +10% | +$2.59M | 0.01% | 1396 |
|
|
2023
Q2 | $36M | Sell |
218,982
-176,571
| -45% | -$30.7M | 0.02% | 962 |
|
|
2023
Q1 | $73M | Buy |
395,553
+204,617
| +107% | +$34.5M | 0.04% | 473 |
|
|
2022
Q4 | $28.2M | Sell |
190,936
-357,690
| -65% | -$49.2M | 0.02% | 1167 |
|
|
2022
Q3 | $77.4M | Sell |
548,626
-173,533
| -24% | -$25.4M | 0.05% | 462 |
|
|
2022
Q2 | $94.4M | Sell |
722,159
-242,534
| -25% | -$32.4M | 0.06% | 328 |
|
|
2022
Q1 | $140M | Buy |
964,693
+723,950
| +301% | +$139M | 0.07% | 212 |
|
|
2021
Q4 | $70.5M | Buy |
240,743
+215,751
| +863% | +$61.4M | 0.04% | 535 |
|
|
2021
Q3 | $6.77M | Buy |
24,992
+14,541
| +139% | +$3.94M | ﹤0.01% | 2534 |
|
|
2021
Q2 | $2.53M | Sell |
10,451
-47,089
| -82% | -$10.7M | ﹤0.01% | 3659 |
|
|
2021
Q1 | $13.2M | Buy |
+57,540
| New | +$14.5M | 0.01% | 1501 |
|
|
2020
Q3 | – | Sell |
-61,912
| Closed | -$13.9M | – | 4670 |
|
|
2020
Q2 | $14.1M | Sell |
61,912
-30,306
| -33% | -$6.65M | 0.02% | 969 |
|
|
2020
Q1 | $16.3M | Buy |
92,218
+87,641
| +1,915% | +$15M | 0.04% | 552 |
|
|
2019
Q4 | $723K | Sell |
4,577
-10,020
| -69% | -$1.51M | ﹤0.01% | 3158 |
|
|
2019
Q3 | $2.17M | Buy |
14,597
+11,626
| +391% | +$1.77M | ﹤0.01% | 2390 |
|
|
2019
Q2 | $442K | Sell |
2,971
-83,606
| -97% | -$11.5M | ﹤0.01% | 3319 |
|
|
2019
Q1 | $12M | Sell |
86,577
-367,596
| -81% | -$46.1M | 0.02% | 1120 |
|
|
2018
Q4 | $48.8M | Sell |
454,173
-650,185
| -59% | -$72.5M | 0.08% | 355 |
|
|
2018
Q3 | $138M | Buy |
1,104,358
+192,905
| +21% | +$21.4M | 0.17% | 113 |
|
|
2018
Q2 | $89M | Buy |
911,453
+431,669
| +90% | +$41M | 0.12% | 217 |
|
|
2018
Q1 | $42.2M | Buy |
479,784
+356,708
| +290% | +$31.1M | 0.06% | 500 |
|
|
2017
Q4 | $10.4M | Sell |
123,076
-132,526
| -52% | -$11.5M | 0.01% | 1300 |
|
|
2017
Q3 | $22.1M | Buy |
255,602
+242,547
| +1,858% | +$21.4M | 0.03% | 732 |
|
|
2017
Q2 | $1.19M | Sell |
13,055
-145,785
| -92% | -$13.4M | ﹤0.01% | 2359 |
|
|
2017
Q1 | $14.8M | Buy |
158,840
+68,442
| +76% | +$5.63M | 0.03% | 814 |
|
|
2016
Q4 | $6.09M | Sell |
90,398
-15,004
| -14% | -$922K | 0.01% | 1203 |
|
|
2016
Q3 | $6.27M | Sell |
105,402
-139,050
| -57% | -$7.84M | 0.01% | 1202 |
|
|
2016
Q2 | $12.8M | Buy |
244,452
+178,470
| +270% | +$8.41M | 0.03% | 724 |
|
|
2016
Q1 | $2.76M | Sell |
65,982
-107,054
| -62% | -$4.03M | 0.01% | 1610 |
|
|
2015
Q4 | $7.18M | Buy |
173,036
+157,092
| +985% | +$6.42M | 0.02% | 1115 |
|
|
2015
Q3 | $615K | Sell |
15,944
-4,691
| -23% | -$192K | ﹤0.01% | 2557 |
|
|
2015
Q2 | $799K | Sell |
20,635
-227,504
| -92% | -$8.15M | ﹤0.01% | 2387 |
|
|
2015
Q1 | $8.18M | Buy |
248,139
+180,044
| +264% | +$5.18M | 0.02% | 1136 |
|
|
2014
Q4 | $1.79M | Sell |
68,095
-317,306
| -82% | -$7.83M | ﹤0.01% | 2059 |
|
|
2014
Q3 | $8.2M | Buy |
385,401
+97,248
| +34% | +$2.22M | 0.02% | 978 |
|
|
2014
Q2 | $6.8M | Buy |
288,153
+268,153
| +1,341% | +$6.65M | 0.02% | 1020 |
|
|
2014
Q1 | $546K | Sell |
20,000
-142,451
| -88% | -$4.06M | ﹤0.01% | 2568 |
|
|
2013
Q4 | $4.75M | Buy |
162,451
+154,851
| +2,038% | +$4.33M | 0.02% | 1212 |
|
|
2013
Q3 | $202K | Sell |
7,600
-169,506
| -96% | -$4.18M | ﹤0.01% | 3100 |
|
|
2013
Q2 | $3.75M | Buy |
+177,106
| New | +$3.73M | 0.01% | 1205 |
|
Other funds holding MASI
PCM
PCM
HI
VCM
VPM
Millennium Management's MASI Position: Q1 2026 in Review
Millennium Management increased its Masimo (MASI) stake by 426% in Q1 2026, buying an estimated $126M and bringing the position to 988,853 shares worth $176M. The position accounts for 0.07% of the portfolio, ranked #241.
Millennium Management first reported a position in MASI in Q2 2013 and has held it in 50 quarters since. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.
- Millennium Management held 988,853 shares of Masimo worth $176M as of Q1 2026.
- Millennium Management bought 800,888 Masimo shares in Q1 2026, an estimated $126M.
- Masimo made up 0.07% of Millennium Management's portfolio in Q1 2026, its #241 holding.
- Millennium Management first reported a position in Masimo in Q2 2013 and has held it in 50 quarters since.
- 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.
Based on Millennium Management's 13F filing for Q1 2026, filed 15 May 2026.