Jane Street
MRCY icon

Jane Street’s Mercury Systems MRCY Stock Holding History

Jane Street’s Portfolio MRCY Stock Details MRCY Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$1.13M Sell
9,200
-3,700
-29% -$353K ﹤0.01% 6282
2026
Q1 		$941K Buy
12,900
+2,900
+29% +$253K ﹤0.01% 6648
2025
Q4 		$730K Buy
10,000
+3,400
+52% +$253K ﹤0.01% 6859
2025
Q3 		$511K Buy
+6,600
New +$410K ﹤0.01% 7814
2023
Q2 		– Sell
-13,100
Closed -$670K – 9244
2023
Q1 		$670K Buy
+13,100
New +$662K ﹤0.01% 5791
2022
Q4 		– Sell
-11,900
Closed -$483K – 9757
2022
Q3 		$483K Sell
11,900
-6,000
-34% -$314K ﹤0.01% 6752
2022
Q2 		$1.15M Sell
17,900
-47,400
-73% -$2.83M ﹤0.01% 5221
2022
Q1 		$4.21M Buy
65,300
+43,000
+193% +$2.55M ﹤0.01% 3326
2021
Q4 		$1.23M Buy
22,300
+9,900
+80% +$501K ﹤0.01% 5486
2021
Q3 		$588K Sell
12,400
-700
-5% -$38.9K ﹤0.01% 6977
2021
Q2 		$868K Buy
13,100
+1,500
+13% +$104K ﹤0.01% 6133
2021
Q1 		$820K Buy
11,600
+8,600
+287% +$622K ﹤0.01% 5846
2020
Q4 		$264K Sell
3,000
-3,400
-53% -$258K ﹤0.01% 6590
2020
Q3 		$496K Sell
6,400
-2,800
-30% -$212K ﹤0.01% 5166
2020
Q2 		$724K Buy
+9,200
New +$753K ﹤0.01% 4536

Other funds holding MRCY

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
JPM
JANA Partners Management New York $1.9B AUM 18.33% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
CCA
Conestoga Capital Advisors Wayne, Pennsylvania $4.6B AUM 16.08% 1-Year Est. Return

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.