Jane Street’s Mercury Systems MRCY Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q2 | $14.1M | Buy |
+115,338
| New | +$11M | ﹤0.01% | 2458 |
|
|
2025
Q4 | – | Sell |
-25,641
| Closed | -$1.91M | – | 11911 |
|
|
2025
Q3 | $1.98M | Buy |
+25,641
| New | +$1.59M | ﹤0.01% | 4955 |
|
|
2025
Q2 | – | Sell |
-50,769
| Closed | -$2.47M | – | 10425 |
|
|
2025
Q1 | $2.19M | Buy |
50,769
+36,237
| +249% | +$1.59M | ﹤0.01% | 4210 |
|
|
2024
Q4 | $610K | Sell |
14,532
-20,943
| -59% | -$799K | ﹤0.01% | 6352 |
|
|
2024
Q3 | $1.31M | Buy |
35,475
+19,504
| +122% | +$686K | ﹤0.01% | 5328 |
|
|
2024
Q2 | $431K | Sell |
15,971
-241,543
| -94% | -$7.05M | ﹤0.01% | 7257 |
|
|
2024
Q1 | $7.6M | Buy |
257,514
+130,396
| +103% | +$3.93M | ﹤0.01% | 2095 |
|
|
2023
Q4 | $4.65M | Buy |
127,118
+71,490
| +129% | +$2.58M | ﹤0.01% | 2959 |
|
|
2023
Q3 | $2.06M | Sell |
55,628
-1,083
| -2% | -$39.9K | ﹤0.01% | 4011 |
|
|
2023
Q2 | $1.96M | Buy |
56,711
+32,654
| +136% | +$1.39M | ﹤0.01% | 4195 |
|
|
2023
Q1 | $1.23M | Buy |
24,057
+9,440
| +65% | +$477K | ﹤0.01% | 4638 |
|
|
2022
Q4 | $654K | Buy |
14,617
+51
| +0.4% | +$2.41K | ﹤0.01% | 5683 |
|
|
2022
Q3 | $592K | Sell |
14,566
-4,189
| -22% | -$220K | ﹤0.01% | 6373 |
|
|
2022
Q2 | $1.21M | Sell |
18,755
-61,366
| -77% | -$3.66M | ﹤0.01% | 5127 |
|
|
2022
Q1 | $5.16M | Buy |
80,121
+66,120
| +472% | +$3.93M | ﹤0.01% | 2982 |
|
|
2021
Q4 | $770K | Buy |
+14,001
| New | +$709K | ﹤0.01% | 6430 |
|
|
2021
Q3 | – | Sell |
-3,866
| Closed | -$215K | – | 10428 |
|
|
2021
Q2 | $256K | Sell |
3,866
-8,688
| -69% | -$600K | ﹤0.01% | 8426 |
|
|
2021
Q1 | $887K | Buy |
12,554
+9,709
| +341% | +$702K | ﹤0.01% | 5681 |
|
|
2020
Q4 | $251K | Sell |
2,845
-18,125
| -86% | -$1.38M | ﹤0.01% | 6660 |
|
|
2020
Q3 | $1.62M | Sell |
20,970
-115,053
| -85% | -$8.73M | ﹤0.01% | 3353 |
|
|
2020
Q2 | $10.7M | Buy |
136,023
+131,160
| +2,697% | +$10.7M | 0.01% | 1139 |
|
|
2020
Q1 | $347K | Buy |
4,863
+1,695
| +54% | +$128K | ﹤0.01% | 4045 |
|
|
2019
Q4 | $219K | Buy |
+3,168
| New | +$228K | ﹤0.01% | 4636 |
|
|
2019
Q3 | – | Sell |
-4,241
| Closed | -$298K | – | 5507 |
|
|
2019
Q2 | $298K | Buy |
+4,241
| New | +$294K | ﹤0.01% | 4197 |
|
|
2018
Q4 | – | Sell |
-13,025
| Closed | -$721K | – | 5422 |
|
|
2018
Q3 | $721K | Buy |
+13,025
| New | +$630K | ﹤0.01% | 3166 |
|
|
2017
Q3 | – | Sell |
-10,179
| Closed | -$428K | – | 4848 |
|
|
2017
Q2 | $428K | Buy |
+10,179
| New | +$400K | ﹤0.01% | 3220 |
|
|
2014
Q4 | – | Sell |
-10,215
| Closed | -$112K | – | 2826 |
|
|
2014
Q3 | $112K | Buy |
+10,215
| New | +$115K | ﹤0.01% | 2344 |
|
Other funds holding MRCY
JPM
CCA
Jane Street's MRCY Position: Q2 2026 in Review
Jane Street opened a new position in Mercury Systems (MRCY) in Q2 2026: 115,338 shares worth $14.1M. The stake represents ﹤0.01% of the portfolio and ranks #2458 among its holdings. This is a return to the name: Jane Street previously reported a position in MRCY as recently as Q3 2025.
Jane Street first reported a position in MRCY in Q3 2014 and has held it in 27 quarters since. 392 funds tracked by Wall St. Rank hold MRCY as of Q2 2026.
- Jane Street held 115,338 shares of Mercury Systems worth $14.1M as of Q2 2026.
- Mercury Systems was a new Jane Street position in Q2 2026.
- Mercury Systems made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #2458 holding.
- Jane Street first reported a position in Mercury Systems in Q3 2014 and has held it in 27 quarters since.
- 392 funds tracked by Wall St. Rank held Mercury Systems as of Q2 2026.
Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.