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Castleark Management’s Mercury Systems MRCY Stock Holding History

Castleark Management’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 		$1.83M Sell
25,048
-93,410
-79% -$8.13M 0.06% 202
2025
Q4 		$8.65M Buy
118,458
+16,990
+17% +$1.26M 0.25% 85
2025
Q3 		$7.85M Buy
101,468
+8,668
+9% +$539K 0.22% 93
2025
Q2 		$5M Buy
+92,800
New +$4.52M 0.15% 126
2024
Q1 		– Sell
-73,820
Closed -$2.7M – 303
2023
Q4 		$2.7M Buy
+73,820
New +$2.66M 0.12% 167
2022
Q3 		– Sell
-98,910
Closed -$6.36M – 313
2022
Q2 		$6.36M Buy
98,910
+45,040
+84% +$2.69M 0.34% 59
2022
Q1 		$3.47M Buy
+53,870
New +$3.2M 0.15% 144
2019
Q4 		– Sell
-127,770
Closed -$10.4M – 379
2019
Q3 		$10.4M Buy
+127,770
New +$10.1M 0.42% 77
2018
Q1 		– Sell
-192,186
Closed -$9.87M – 424
2017
Q4 		$9.87M Buy
192,186
+10,480
+6% +$538K 0.3% 117
2017
Q3 		$9.43M Sell
181,706
-74,440
-29% -$3.43M 0.3% 118
2017
Q2 		$10.8M Sell
256,146
-82,950
-24% -$3.26M 0.35% 95
2017
Q1 		$13.2M Buy
339,096
+242
+0.1% +$8.6K 0.42% 72
2016
Q4 		$10.2M Buy
+338,854
New +$9.63M 0.33% 98

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 $5.01B AUM 6.26% 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

Castleark Management's MRCY Position: Q1 2026 in Review

Castleark Management reduced its Mercury Systems (MRCY) stake by 79% in Q1 2026, selling an estimated $8.13M and leaving 25,048 shares worth $1.83M. The position accounts for 0.06% of the portfolio, ranked #202.

Castleark Management first reported a position in MRCY in Q4 2016 and has held it in 13 quarters since. The position peaked at $13.2M in Q1 2017. 356 funds tracked by Wall St. Rank hold MRCY as of Q1 2026.

  • Castleark Management held 25,048 shares of Mercury Systems worth $1.83M as of Q1 2026.
  • Castleark Management sold 93,410 Mercury Systems shares in Q1 2026, an estimated $8.13M.
  • Mercury Systems made up 0.06% of Castleark Management's portfolio in Q1 2026, its #202 holding.
  • Castleark Management first reported a position in Mercury Systems in Q4 2016 and has held it in 13 quarters since.
  • Castleark Management's Mercury Systems position peaked at $13.2M in Q1 2017.
  • 356 funds tracked by Wall St. Rank held Mercury Systems as of Q1 2026.

Based on Castleark Management's 13F filing for Q1 2026, filed 15 May 2026.