Jane Street’s MKS Inc MKSI Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $55.9M | Sell |
243,253
-139,862
| -37% | -$31.6M | 0.01% | 980 |
|
|
2025
Q4 | $61.2M | Buy |
383,115
+251,473
| +191% | +$37.3M | 0.01% | 827 |
|
|
2025
Q3 | $16.3M | Buy |
131,642
+124,275
| +1,687% | +$13.2M | ﹤0.01% | 1859 |
|
|
2025
Q2 | $732K | Sell |
7,367
-95,703
| -93% | -$7.78M | ﹤0.01% | 6214 |
|
|
2025
Q1 | $8.26M | Sell |
103,070
-78,492
| -43% | -$7.93M | ﹤0.01% | 2235 |
|
|
2024
Q4 | $19M | Sell |
181,562
-134,616
| -43% | -$14.5M | ﹤0.01% | 1300 |
|
|
2024
Q3 | $34.4M | Buy |
316,178
+133,837
| +73% | +$15.9M | 0.01% | 882 |
|
|
2024
Q2 | $23.8M | Buy |
182,341
+108,509
| +147% | +$13.7M | 0.01% | 1180 |
|
|
2024
Q1 | $9.82M | Sell |
73,832
-51,649
| -41% | -$6M | ﹤0.01% | 1834 |
|
|
2023
Q4 | $12.9M | Buy |
125,481
+88,383
| +238% | +$7.18M | ﹤0.01% | 1681 |
|
|
2023
Q3 | $3.21M | Buy |
37,098
+25,856
| +230% | +$2.52M | ﹤0.01% | 3266 |
|
|
2023
Q2 | $1.22M | Sell |
11,242
-27,023
| -71% | -$2.47M | ﹤0.01% | 4904 |
|
|
2023
Q1 | $3.39M | Buy |
38,265
+20,813
| +119% | +$1.99M | ﹤0.01% | 2985 |
|
|
2022
Q4 | $1.48M | Sell |
17,452
-12,466
| -42% | -$999K | ﹤0.01% | 4340 |
|
|
2022
Q3 | $2.47M | Buy |
29,918
+6,636
| +29% | +$683K | ﹤0.01% | 3815 |
|
|
2022
Q2 | $2.39M | Buy |
+23,282
| New | +$2.71M | ﹤0.01% | 3830 |
|
|
2022
Q1 | – | Sell |
-4,199
| Closed | -$652K | – | 10751 |
|
|
2021
Q4 | $732K | Buy |
4,199
+2,494
| +146% | +$390K | ﹤0.01% | 6550 |
|
|
2021
Q3 | $257K | Buy |
+1,705
| New | +$262K | ﹤0.01% | 8459 |
|
|
2021
Q2 | – | Sell |
-16,901
| Closed | -$3.07M | – | 10167 |
|
|
2021
Q1 | $3.13M | Buy |
16,901
+14,584
| +629% | +$2.45M | ﹤0.01% | 3165 |
|
|
2020
Q4 | $349K | Sell |
2,317
-77
| -3% | -$10.1K | ﹤0.01% | 6203 |
|
|
2020
Q3 | $261K | Sell |
2,394
-1,662
| -41% | -$195K | ﹤0.01% | 6080 |
|
|
2020
Q2 | $459K | Sell |
4,056
-14,773
| -78% | -$1.47M | ﹤0.01% | 5205 |
|
|
2020
Q1 | $1.53M | Buy |
18,829
+11,759
| +166% | +$1.2M | ﹤0.01% | 2300 |
|
|
2019
Q4 | $778K | Buy |
7,070
+4,584
| +184% | +$480K | ﹤0.01% | 3122 |
|
|
2019
Q3 | $229K | Sell |
2,486
-27,758
| -92% | -$2.29M | ﹤0.01% | 4491 |
|
|
2019
Q2 | $2.36M | Buy |
+30,244
| New | +$2.56M | ﹤0.01% | 1733 |
|
|
2018
Q3 | – | Sell |
-76,346
| Closed | -$7.31M | – | 5479 |
|
|
2018
Q2 | $7.31M | Buy |
+76,346
| New | +$8.33M | 0.02% | 784 |
|
|
2018
Q1 | – | Sell |
-4,330
| Closed | -$475K | – | 5174 |
|
|
2017
Q4 | $409K | Buy |
+4,330
| New | +$431K | ﹤0.01% | 3405 |
|
|
2017
Q2 | – | Sell |
-4,559
| Closed | -$313K | – | 4668 |
|
|
2017
Q1 | $313K | Buy |
+4,559
| New | +$300K | ﹤0.01% | 3386 |
|
|
2014
Q4 | – | Sell |
-7,421
| Closed | -$248K | – | 2812 |
|
|
2014
Q3 | $248K | Buy |
+7,421
| New | +$243K | ﹤0.01% | 2031 |
|
|
2013
Q3 | – | Sell |
-10,700
| Closed | -$284K | – | 2962 |
|
|
2013
Q2 | $284K | Buy |
+10,700
| New | +$289K | ﹤0.01% | 1940 |
|
Other funds holding MKSI
VPM
VCM
Jane Street's MKSI Position: Q1 2026 in Review
Jane Street reduced its MKS Inc (MKSI) stake by 37% in Q1 2026, selling an estimated $31.6M and leaving 243,253 shares worth $55.9M. The position accounts for 0.01% of the portfolio, ranked #980.
Jane Street first reported a position in MKSI in Q2 2013 and has held it in 31 quarters since. The position peaked at $61.2M in Q4 2025. 615 funds tracked by Wall St. Rank hold MKSI as of Q1 2026.
- Jane Street held 243,253 shares of MKS Inc worth $55.9M as of Q1 2026.
- Jane Street sold 139,862 MKS Inc shares in Q1 2026, an estimated $31.6M.
- MKS Inc made up 0.01% of Jane Street's portfolio in Q1 2026, its #980 holding.
- Jane Street first reported a position in MKS Inc in Q2 2013 and has held it in 31 quarters since.
- Jane Street's MKS Inc position peaked at $61.2M in Q4 2025.
- 615 funds tracked by Wall St. Rank held MKS Inc as of Q1 2026.
Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.