Group One Trading
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Group One Trading’s Mercury Systems MRCY Stock Holding History

Group One 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 		$372K Buy
5,100
+1,800
+55% +$157K ﹤0.01% 3605
2025
Q4 		$241K Sell
3,300
-4,400
-57% -$327K ﹤0.01% 4210
2025
Q3 		$596K Sell
7,700
-1,200
-13% -$74.6K ﹤0.01% 3509
2025
Q2 		$479K Buy
8,900
+4,700
+112% +$229K ﹤0.01% 3466
2025
Q1 		$181K Buy
4,200
+1,700
+68% +$74.5K ﹤0.01% 4108
2024
Q4 		$105K Buy
2,500
+900
+56% +$34.3K ﹤0.01% 4481
2024
Q3 		$59.2K Buy
+1,600
New +$56.3K ﹤0.01% 4536
2024
Q1 		– Sell
-800
Closed -$29.3K – 7633
2023
Q4 		$29.3K Sell
800
-3,900
-83% -$141K ﹤0.01% 5466
2023
Q3 		$174K Sell
4,700
-19,100
-80% -$705K ﹤0.01% 3920
2023
Q2 		$823K Buy
23,800
+23,700
+23,700% +$1.01M ﹤0.01% 2537
2023
Q1 		$5.17K Hold
100
– – ﹤0.01% 6263
2022
Q4 		$4.47K Sell
100
-600
-86% -$28.4K ﹤0.01% 6384
2022
Q3 		$28K Buy
+700
New +$36.7K ﹤0.01% 5857
2022
Q2 		– Sell
-100
Closed -$6K – 8247
2022
Q1 		$6K Sell
100
-400
-80% -$23.8K ﹤0.01% 7380
2021
Q4 		$28K Buy
+500
New +$25.3K ﹤0.01% 6760
2021
Q3 		– Sell
-100
Closed -$7K – 8546
2021
Q2 		$7K Hold
100
– – ﹤0.01% 7652
2021
Q1 		$71K Sell
100
-75,000
-100% -$5.42M ﹤0.01% 5954
2020
Q4 		$6.61M Buy
75,100
+74,900
+37,450% +$5.69M 0.01% 1090
2020
Q3 		$15K Buy
200
+100
+100% +$7.59K ﹤0.01% 5263
2020
Q2 		$8K Hold
100
– – ﹤0.01% 5217
2020
Q1 		$7K Sell
100
-200
-67% -$15.2K ﹤0.01% 4681
2019
Q4 		$21K Sell
300
-3,600
-92% -$259K ﹤0.01% 4356
2019
Q3 		$317K Buy
3,900
+600
+18% +$47.4K ﹤0.01% 2717
2019
Q2 		$232K Buy
3,300
+200
+6% +$13.9K ﹤0.01% 2741
2019
Q1 		$199K Buy
3,100
+1,800
+138% +$104K ﹤0.01% 2707
2018
Q4 		$61K Sell
1,300
-20,900
-94% -$1.02M ﹤0.01% 3448
2018
Q3 		$1.23M Buy
22,200
+5,000
+29% +$242K 0.01% 1533
2018
Q2 		$655K Buy
+17,200
New +$666K 0.01% 2084
2018
Q1 		– Sell
-4,900
Closed -$252K – 5127
2017
Q4 		$252K Sell
4,900
-600
-11% -$30.8K ﹤0.01% 2780
2017
Q3 		$285K Buy
5,500
+1,400
+34% +$64.6K ﹤0.01% 2509
2017
Q2 		$173K Buy
4,100
+2,000
+95% +$78.6K ﹤0.01% 2744
2017
Q1 		$82K Buy
2,100
+1,100
+110% +$39.1K ﹤0.01% 3099
2016
Q4 		$30K Buy
+1,000
New +$28.4K ﹤0.01% 3528
2016
Q3 		– Sell
-300
Closed -$7K – 4761
2016
Q2 		$7K Buy
+300
New +$6.45K ﹤0.01% 4187
2015
Q3 		– Sell
-300
Closed -$4K – 5050
2015
Q2 		$4K Sell
300
-2,100
-88% -$30.5K ﹤0.01% 4554
2015
Q1 		$37K Buy
2,400
+2,100
+700% +$33.1K ﹤0.01% 3536
2014
Q4 		$4K Buy
+300
New +$3.84K ﹤0.01% 4545

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

Group One Trading's MRCY Position: Q1 2026 in Review

Group One Trading opened a new position in Mercury Systems (MRCY) in Q1 2026: 303 shares worth $22.1K. The stake represents ﹤0.01% of the portfolio and ranks #5899 among its holdings. This is a return to the name: Group One Trading previously reported a position in MRCY as recently as Q2 2025.

Group One Trading first reported a position in MRCY in Q1 2014 and has held it in 34 quarters since. The position peaked at $982K in Q4 2021. 356 funds tracked by Wall St. Rank hold MRCY as of Q1 2026.

  • Group One Trading held 303 shares of Mercury Systems worth $22.1K as of Q1 2026.
  • Mercury Systems was a new Group One Trading position in Q1 2026.
  • Mercury Systems made up ﹤0.01% of Group One Trading's portfolio in Q1 2026, its #5899 holding.
  • Group One Trading first reported a position in Mercury Systems in Q1 2014 and has held it in 34 quarters since.
  • Group One Trading's Mercury Systems position peaked at $982K in Q4 2021.
  • 356 funds tracked by Wall St. Rank held Mercury Systems as of Q1 2026.

Based on Group One Trading's 13F filing for Q1 2026, filed 13 May 2026.