Walleye Trading
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Walleye Trading’s Mercury Systems MRCY Stock Holding History

Walleye Trading’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
Q1 		$262K Buy
3,600
+2,600
+260% +$226K ﹤0.01% 2959
2025
Q4 		$73K Sell
1,000
-100
-9% -$7.44K ﹤0.01% 3848
2025
Q3 		$85.1K Hold
1,100
– – ﹤0.01% 3779
2025
Q2 		$59.2K Buy
+1,100
New +$53.6K ﹤0.01% 3778
2024
Q3 		– Sell
-100
Closed -$2.7K – 4416
2024
Q2 		$2.7K Hold
100
– – ﹤0.01% 4031
2024
Q1 		$2.95K Sell
100
-3,300
-97% -$99.4K ﹤0.01% 4479
2023
Q4 		$124K Buy
3,400
+300
+10% +$10.8K ﹤0.01% 4045
2023
Q3 		$115K Buy
+3,100
New +$114K ﹤0.01% 3902
2023
Q2 		– Sell
-6,000
Closed -$307K – 4993
2023
Q1 		$307K Buy
+6,000
New +$303K ﹤0.01% 3209
2022
Q3 		– Sell
-10,300
Closed -$663K – 5337
2022
Q2 		$663K Sell
10,300
-11,600
-53% -$692K ﹤0.01% 2633
2022
Q1 		$1.41M Buy
21,900
+17,900
+448% +$1.06M ﹤0.01% 1945
2021
Q4 		$220K Sell
4,000
-9,600
-71% -$486K ﹤0.01% 3779
2021
Q3 		$645K Sell
13,600
-2,000
-13% -$111K ﹤0.01% 2681
2021
Q2 		$1.03M Buy
15,600
+13,600
+680% +$940K ﹤0.01% 2098
2021
Q1 		$141K Sell
2,000
-4,800
-71% -$347K ﹤0.01% 3902
2020
Q4 		$599K Sell
6,800
-3,800
-36% -$289K ﹤0.01% 2496
2020
Q3 		$821K Buy
10,600
+2,400
+29% +$182K ﹤0.01% 1813
2020
Q2 		$645K Buy
+8,200
New +$671K ﹤0.01% 2049
2019
Q4 		– Sell
-1,600
Closed -$130K – 4458
2019
Q3 		$130K Buy
1,600
+700
+78% +$55.3K ﹤0.01% 3203
2019
Q2 		$63K Sell
900
-500
-36% -$34.7K ﹤0.01% 3466
2019
Q1 		$90K Sell
1,400
-900
-39% -$51.9K ﹤0.01% 3504
2018
Q4 		$109K Sell
2,300
-30,900
-93% -$1.51M ﹤0.01% 3845
2018
Q3 		$1.84M Sell
33,200
-19,400
-37% -$939K 0.01% 1424
2018
Q2 		$2M Buy
+52,600
New +$2.04M 0.01% 1350

Other funds holding MRCY

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
JPM
JANA Partners Management New York $1.67B AUM 1.66% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
CCA
Conestoga Capital Advisors Wayne, Pennsylvania $4.6B AUM 16.08% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Walleye Trading's MRCY Position: Q1 2026 in Review

Walleye Trading opened a new position in Mercury Systems (MRCY) in Q1 2026: 635 shares worth $46.3K. The stake represents ﹤0.01% of the portfolio and ranks #3703 among its holdings. This is a return to the name: Walleye Trading previously reported a position in MRCY as recently as Q3 2025.

Walleye Trading first reported a position in MRCY in Q2 2015 and has held it in 16 quarters since. The position peaked at $638K in Q4 2023. 356 funds tracked by Wall St. Rank hold MRCY as of Q1 2026.

  • Walleye Trading held 635 shares of Mercury Systems worth $46.3K as of Q1 2026.
  • Mercury Systems was a new Walleye Trading position in Q1 2026.
  • Mercury Systems made up ﹤0.01% of Walleye Trading's portfolio in Q1 2026, its #3703 holding.
  • Walleye Trading first reported a position in Mercury Systems in Q2 2015 and has held it in 16 quarters since.
  • Walleye Trading's Mercury Systems position peaked at $638K in Q4 2023.
  • 356 funds tracked by Wall St. Rank held Mercury Systems as of Q1 2026.

Based on Walleye Trading's 13F filing for Q1 2026, filed 11 May 2026.