Jane Street’s Masimo MASI Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q2 | – | Sell |
-8,500
| Closed | -$1.51M | – | 12491 |
|
|
2026
Q1 | $1.51M | Buy |
8,500
+5,700
| +204% | +$895K | ﹤0.01% | 5623 |
|
|
2025
Q4 | $364K | Sell |
2,800
-1,400
| -33% | -$200K | ﹤0.01% | 8401 |
|
|
2025
Q3 | $620K | Buy |
4,200
+1,300
| +45% | +$197K | ﹤0.01% | 7383 |
|
|
2025
Q2 | $488K | Buy |
+2,900
| New | +$463K | ﹤0.01% | 6964 |
|
|
2025
Q1 | – | Sell |
-9,300
| Closed | -$1.54M | – | 10134 |
|
|
2024
Q4 | $1.54M | Sell |
9,300
-19,300
| -67% | -$3.05M | ﹤0.01% | 4591 |
|
|
2024
Q3 | $3.81M | Buy |
28,600
+4,200
| +17% | +$487K | ﹤0.01% | 3304 |
|
|
2024
Q2 | $3.07M | Buy |
24,400
+16,500
| +209% | +$2.17M | ﹤0.01% | 3774 |
|
|
2024
Q1 | $1.16M | Sell |
7,900
-63,800
| -89% | -$8.24M | ﹤0.01% | 5130 |
|
|
2023
Q4 | $8.4M | Buy |
71,700
+6,800
| +10% | +$634K | ﹤0.01% | 2165 |
|
|
2023
Q3 | $5.69M | Buy |
64,900
+58,100
| +854% | +$6.76M | ﹤0.01% | 2433 |
|
|
2023
Q2 | $1.12M | Buy |
6,800
+1,300
| +24% | +$226K | ﹤0.01% | 5032 |
|
|
2023
Q1 | $1.01M | Buy |
5,500
+3,800
| +224% | +$641K | ﹤0.01% | 4967 |
|
|
2022
Q4 | $252K | Sell |
1,700
-10,400
| -86% | -$1.43M | ﹤0.01% | 7312 |
|
|
2022
Q3 | $1.71M | Buy |
12,100
+10,500
| +656% | +$1.53M | ﹤0.01% | 4468 |
|
|
2022
Q2 | $209K | Sell |
1,600
-26,300
| -94% | -$3.52M | ﹤0.01% | 8144 |
|
|
2022
Q1 | $4.06M | Sell |
27,900
-97,900
| -78% | -$18.8M | ﹤0.01% | 3399 |
|
|
2021
Q4 | $36.8M | Buy |
125,800
+67,800
| +117% | +$19.3M | 0.01% | 802 |
|
|
2021
Q3 | $15.7M | Buy |
58,000
+47,900
| +474% | +$13M | 0.01% | 1315 |
|
|
2021
Q2 | $2.45M | Sell |
10,100
-56,200
| -85% | -$12.8M | ﹤0.01% | 3938 |
|
|
2021
Q1 | $15.2M | Buy |
66,300
+61,600
| +1,311% | +$15.5M | 0.01% | 1194 |
|
|
2020
Q4 | $1.26M | Sell |
4,700
-32,200
| -87% | -$8.03M | ﹤0.01% | 4284 |
|
|
2020
Q3 | $8.71M | Sell |
36,900
-46,600
| -56% | -$10.4M | 0.01% | 1326 |
|
|
2020
Q2 | $19M | Buy |
+83,500
| New | +$18.3M | 0.01% | 786 |
|
Other funds holding MASI
Jane Street's MASI Position: Q2 2026 in Review
Jane Street sold out of Masimo (MASI) in Q2 2026, closing a stake of 1,215 shares — an estimated $216K sold.
Jane Street first reported a position in MASI in Q3 2013 and held it in 36 quarters. The position peaked at $18.2M in Q3 2022. 2 funds tracked by Wall St. Rank hold MASI as of Q2 2026.
- Jane Street reported no remaining Masimo position as of Q2 2026 after selling out during the quarter.
- Jane Street sold 1,215 Masimo shares in Q2 2026, an estimated $216K.
- Jane Street first reported a position in Masimo in Q3 2013 and held it in 36 quarters.
- Jane Street's Masimo position peaked at $18.2M in Q3 2022.
- 2 funds tracked by Wall St. Rank held Masimo as of Q2 2026.
Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.