MRCY
Mercury System (MRCY)
NASDAQ
$74.93+$0.05 (+0.07%)
Price as of Oct 23, 2026 7:30 PM EDT
  • $4.6B
    Market Cap
  • -5.73%
    1-Year Change
  • Aerospace & Defense
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
BLACKROCK, INC.
15.40%
9.4M
+450,577 (+4.81%)
Jun 30, 2026
BLACKROCK FUNDING, INC. /DE
14.49%
8.8M
+145,124 (+1.65%)
Dec 31, 2024
BLACKROCK INC.
14.47%
8.8M
+1.4M (+15.93%)
Jun 30, 2024
VANGUARD GROUP INC
9.25%
5.6M
-98,984 (-1.76%)
Dec 31, 2025
JANA PARTNERS LLC
7.22%
4.4M
+2.4M (+54.64%)
Jun 30, 2023
JANA PARTNERS MANAGEMENT, LP
6.50%
4.0M
-148,575 (-3.75%)
Jun 30, 2026
BLACKROCK FUND ADVISORS
6.28%
3.8M
+986,626 (+25.80%)
Dec 31, 2016

Current Ownership Distribution

  • Institutions1.2B (70.43%)
  • Mutual Funds481.6M (28.75%)
  • Insiders13.6M (0.81%)
  • Other0 (0.00%)

Insider Transactions

  • 0.81% (13.6M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 8
    Number of InsiderSelling (last 12 months)
  • $2.1B
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Nearhos Barry R
Award
Oct 15, 2026
$0.00
235
$0.00
31,729
KUPINSKY STUART
EVP, CLO & Corp Sec
Sell
Sep 21, 2026
$86,520.00
1,000
$86.52
60,971
Ratner Steven
EVP, CHRO
Sell
Sep 03, 2026
$338,030.40
4,000
$84.51
19,275
Ballhaus William L
Chairman, President & CEO
Exempt
Aug 26, 2026
$2.9M
68,476
$43.00
410,912
Ballhaus William L
Chairman, President & CEO
Sell
Aug 26, 2026
$3.4M
38,276
$88.91
372,636
Ballhaus William L
Chairman, President & CEO
Sell
Aug 26, 2026
$970,491.62
10,814
$89.74
361,822
Ballhaus William L
Chairman, President & CEO
Exempt
Aug 26, 2026
$0.00
68,476
$0.00
0
Ballhaus William L
Chairman, President & CEO
Exempt
Aug 25, 2026
$6.6M
153,676
$43.00
453,512
Ballhaus William L
Chairman, President & CEO
Sell
Aug 25, 2026
$9.4M
107,628
$87.09
345,884
Ballhaus William L
Chairman, President & CEO
Sell
Aug 25, 2026
$303,399.86
3,448
$87.99
342,436
Ballhaus William L
Chairman, President & CEO
Exempt
Aug 25, 2026
$0.00
153,676
$0.00
68,476
Ballhaus William L
Chairman, President & CEO
Exempt
Aug 24, 2026
$0.00
140,650
$0.00
0
Ballhaus William L
Chairman, President & CEO
Exempt
Aug 24, 2026
$0.00
11,348
$0.00
222,152
Ballhaus William L
Chairman, President & CEO
Exempt
Aug 24, 2026
$5.9M
140,650
$42.00
396,697
Ballhaus William L
Chairman, President & CEO
Exempt
Aug 24, 2026
$487,964.00
11,348
$43.00
408,045
Ballhaus William L
Chairman, President & CEO
Sell
Aug 24, 2026
$9.4M
105,471
$89.47
302,574
Ballhaus William L
Chairman, President & CEO
Sell
Aug 24, 2026
$248,062.80
2,738
$90.60
299,836
KUPINSKY STUART
EVP, CLO & Corp Sec
Sell
Aug 21, 2026
$95,230.00
1,000
$95.23
56,352
Ballhaus William L
Chairman, President & CEO
Exempt
Aug 21, 2026
$3.9M
92,850
$42.00
321,047
Ballhaus William L
Chairman, President & CEO
Sell
Aug 21, 2026
$6.0M
64,796
$92.40
256,251
Ballhaus William L
Chairman, President & CEO
Sell
Aug 21, 2026
$19,075.63
204
$93.51
256,047
Ballhaus William L
Chairman, President & CEO
Exempt
Aug 21, 2026
$0.00
92,850
$0.00
140,650
Ballhaus William L
Chairman, President & CEO
Sell
Aug 20, 2026
$2.1M
22,010
$97.67
228,197
Ratner Steven
EVP, CHRO
Sell
Aug 20, 2026
$100,212.91
1,026
$97.67
23,275
Farnsworth David E.
EVP, CFO
Sell
Aug 20, 2026
$645,816.52
6,612
$97.67
117,967
Munro Douglas
SVP, CAO
Sell
Aug 20, 2026
$10,646.40
109
$97.67
12,982
KUPINSKY STUART
EVP, CLO & Corp Sec
Sell
Aug 19, 2026
$131,200.25
1,308
$100.31
57,352
Ratner Steven
EVP, CHRO
Sell
Aug 19, 2026
$219,369.22
2,187
$100.31
24,301
Ballhaus William L
Chairman, President & CEO
Sell
Aug 19, 2026
$2.7M
26,802
$100.31
250,207
Munro Douglas
SVP, CAO
Sell
Aug 19, 2026
$54,967.69
548
$100.31
13,091