Ken Griffin
MRCY icon

Ken Griffin’s Mercury Systems MRCY Stock Holding History

Ken Griffin’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 		$21.4M Buy
292,866
+188,490
+181% +$16.4M ﹤0.01% 2258
2025
Q4 		$7.62M Sell
104,376
-46,198
-31% -$3.44M ﹤0.01% 3635
2025
Q3 		$11.7M Sell
150,574
-146,403
-49% -$9.1M ﹤0.01% 3045
2025
Q2 		$16M Buy
296,977
+107,542
+57% +$5.24M ﹤0.01% 2417
2025
Q1 		$8.16M Buy
189,435
+176,722
+1,390% +$7.74M ﹤0.01% 3132
2024
Q4 		$534K Sell
12,713
-51,372
-80% -$1.96M ﹤0.01% 8402
2024
Q3 		$2.37M Buy
+64,085
New +$2.26M ﹤0.01% 5212
2024
Q2 		– Sell
-126,321
Closed -$3.68M – 14993
2024
Q1 		$3.73M Buy
126,321
+97,506
+338% +$2.94M ﹤0.01% 4421
2023
Q4 		$1.05M Sell
28,815
-318,989
-92% -$11.5M ﹤0.01% 6567
2023
Q3 		$12.9M Sell
347,804
-174,104
-33% -$6.42M ﹤0.01% 2364
2023
Q2 		$18.1M Buy
521,908
+506,378
+3,261% +$21.6M ﹤0.01% 1991
2023
Q1 		$794K Sell
15,530
-10,450
-40% -$528K ﹤0.01% 7300
2022
Q4 		$1.16M Sell
25,980
-5,035
-16% -$238K ﹤0.01% 6525
2022
Q3 		$1.26M Buy
31,015
+26,317
+560% +$1.38M ﹤0.01% 6495
2022
Q2 		$302K Sell
4,698
-85,324
-95% -$5.09M ﹤0.01% 9786
2022
Q1 		$5.8M Buy
90,022
+56,665
+170% +$3.36M ﹤0.01% 3889
2021
Q4 		$1.84M Sell
33,357
-323,320
-91% -$16.4M ﹤0.01% 6449
2021
Q3 		$16.9M Buy
356,677
+304,167
+579% +$16.9M ﹤0.01% 2243
2021
Q2 		$3.48M Sell
52,510
-155,220
-75% -$10.7M ﹤0.01% 5254
2021
Q1 		$14.7M Buy
207,730
+58,439
+39% +$4.22M ﹤0.01% 2400
2020
Q4 		$13.1M Buy
149,291
+30,494
+26% +$2.32M ﹤0.01% 2288
2020
Q3 		$9.2M Buy
118,797
+8,250
+7% +$626K ﹤0.01% 2387
2020
Q2 		$8.7M Buy
110,547
+5,983
+6% +$490K ﹤0.01% 2390
2020
Q1 		$7.46M Buy
104,564
+88,707
+559% +$6.72M ﹤0.01% 2207
2019
Q4 		$1.1M Buy
+15,857
New +$1.14M ﹤0.01% 5426
2019
Q3 		– Sell
-103,825
Closed -$8.2M – 9549
2019
Q2 		$7.3M Buy
103,825
+12,254
+13% +$850K ﹤0.01% 2573
2019
Q1 		$5.87M Buy
91,571
+85,438
+1,393% +$4.93M ﹤0.01% 2767
2018
Q4 		$290K Buy
6,133
+1,169
+24% +$57K ﹤0.01% 7330
2018
Q3 		$275K Sell
4,964
-23,425
-83% -$1.13M ﹤0.01% 7714
2018
Q2 		$1.08M Buy
28,389
+19,005
+203% +$736K ﹤0.01% 5081
2018
Q1 		$453K Buy
9,384
+1,366
+17% +$65.1K ﹤0.01% 6055
2017
Q4 		$412K Buy
+8,018
New +$411K ﹤0.01% 5951
2016
Q4 		– Sell
-11,419
Closed -$281K – 7629
2016
Q3 		$281K Buy
+11,419
New +$274K ﹤0.01% 5778
2016
Q2 		– Sell
-50,318
Closed -$1.02M – 7179
2016
Q1 		$1.02M Buy
50,318
+26,378
+110% +$461K ﹤0.01% 3463
2015
Q4 		$440K Sell
23,940
-23,005
-49% -$417K ﹤0.01% 4638
2015
Q3 		$747K Buy
46,945
+11,622
+33% +$176K ﹤0.01% 4220
2015
Q2 		$517K Sell
35,323
-78,132
-69% -$1.14M ﹤0.01% 4913
2015
Q1 		$1.76M Buy
113,455
+38,041
+50% +$600K ﹤0.01% 3222
2014
Q4 		$1.05M Buy
75,414
+60,598
+409% +$776K ﹤0.01% 3708
2014
Q3 		$163K Buy
+14,816
New +$167K ﹤0.01% 5940

Other funds holding MRCY

BlackRock
BlackRock New York $6.73T AUM 46.02% 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 $3.37T AUM 44.26% 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 $1.88T AUM 44.46% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Ken Griffin's MRCY Position: Q1 2026 in Review

Ken Griffin increased its Mercury Systems (MRCY) stake by 181% in Q1 2026, buying an estimated $16.4M and bringing the position to 292,866 shares worth $21.4M. The position accounts for ﹤0.01% of the portfolio, ranked #2258.

Ken Griffin first reported a position in MRCY in Q3 2014 and has held it in 40 quarters since. 357 funds tracked by Wall St. Rank hold MRCY as of Q1 2026.

  • Ken Griffin held 292,866 shares of Mercury Systems worth $21.4M as of Q1 2026.
  • Ken Griffin bought 188,490 Mercury Systems shares in Q1 2026, an estimated $16.4M.
  • Mercury Systems made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #2258 holding.
  • Ken Griffin first reported a position in Mercury Systems in Q3 2014 and has held it in 40 quarters since.
  • 357 funds tracked by Wall St. Rank held Mercury Systems as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.