MERCURY SYSTEMS INC - Common Stock (MRCY) Institutional Ownership

13F Institutional Holders and Ownership History from Q1 2014 to Q4 2025

Type / Class
Equity / Common Stock
Symbol
MRCY on Nasdaq
Shares outstanding
60,146,024
Price per share
$73.02
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
64,852,076
Total reported value
$5,021,039,251
% of total 13F portfolios
0.01%
Share change
-181,840
Value change
+$7,655,703
Number of holders
319
Price from insider filings
$73.02
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of MERCURY SYSTEMS INC - Common Stock (MRCY) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
BlackRock, Inc. 13% $370,550,319 7,972,253 BlackRock, Inc. 30 Jun 2025
JANA Partners Management, LP 8.3% -17% $384,420,645 -$77,217,181 4,966,675 -17% JANA Partners Management, LP 06 Nov 2025
STATE STREET CORP 5% +2% $137,948,203 +$2,352,594 2,987,185 +1.7% STATE STREET CORPORATION 31 Mar 2025
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 4.2% -46% $195,522,694 -$167,923,170 2,526,133 -46% WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 30 Sep 2025

As of 30 Sep 2025, 319 institutional investors reported holding 64,852,076 shares of MERCURY SYSTEMS INC - Common Stock (MRCY). This represents 108% of the company’s total 60,146,024 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of MERCURY SYSTEMS INC - Common Stock (MRCY) together control 81% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
BlackRock, Inc. 14% 8,477,158 +2.8% 0.01% $656,131,994
JANA Partners Management, LP 9.9% 5,959,481 -12% 22% $461,263,829
VANGUARD GROUP INC 9.5% 5,731,033 +4% 0.01% $443,581,953
STATE STREET CORP 5.1% 3,055,358 -5.9% 0.01% $236,484,709
WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC 4.1% 2,487,957 -47% 0.5% $192,567,872
Conestoga Capital Advisors, LLC 3.8% 2,279,909 -11% 2.8% $176,464,957
DIMENSIONAL FUND ADVISORS LP 2.9% 1,743,814 -4.8% 0.03% $134,960,384
FIRST TRUST ADVISORS LP 2.5% 1,532,822 +96% 0.09% $118,640,422
Invesco Ltd. 2.5% 1,527,443 +162% 0.02% $118,224,089
T. Rowe Price Investment Management, Inc. 2.5% 1,521,669 +57% 0.07% $117,778,000
FMR LLC 2.5% 1,483,473 +27% 0.01% $114,820,778
GEODE CAPITAL MANAGEMENT, LLC 2.2% 1,321,485 +4.5% 0.01% $102,296,019
BAMCO INC /NY/ 2.2% 1,295,284 +4.9% 0.27% $100,254,982
GOLDMAN SACHS GROUP INC 2.1% 1,239,435 +17% 0.01% $95,932,269
NEUBERGER BERMAN GROUP LLC 1.7% 1,046,469 -0.94% 0.06% $80,899,847
LOOMIS SAYLES & CO L P 1.5% 884,615 -11% 0.08% $68,469,201
MORGAN STANLEY 1.5% 876,397 -5.6% 0% $67,833,189
Fisher Asset Management, LLC 1.5% 875,279 +21% 0.02% $67,746,594
PRICE T ROWE ASSOCIATES INC /MD/ 1.4% 866,077 +1869% 0.01% $67,035,000
SNYDER CAPITAL MANAGEMENT L P 1.3% 781,404 -18% 1.1% $60,480,670
LORD, ABBETT & CO. LLC 1.3% 770,246 +39% 0.18% $59,617,000
VICTORY CAPITAL MANAGEMENT INC 1.2% 750,321 -57% 0.04% $58,074,845
VAN ECK ASSOCIATES CORP 1.2% 720,856 +1.7% 0.05% $55,794,000
Allspring Global Investments Holdings, LLC 1.2% 693,867 +287% 0.09% $56,328,123
SEGALL BRYANT & HAMILL, LLC 1.1% 684,123 -32% 0.71% $52,951,120

Institutional Holders of MERCURY SYSTEMS INC - Common Stock (MRCY) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 133,721 $9,898,538 +$5,903,640 $73.02 16
2025 Q3 64,852,076 $5,021,039,251 +$7,655,703 $77.40 319
2025 Q2 65,052,617 $3,502,859,076 +$105,323,199 $53.86 283
2025 Q1 63,147,239 $2,720,880,963 +$8,775,972 $43.09 250
2024 Q4 63,440,878 $2,664,566,291 +$36,153,431 $42.00 240
2024 Q3 63,026,687 $2,331,446,891 -$28,112,245 $37.00 242
2024 Q2 64,653,373 $1,745,002,038 +$67,220,956 $26.99 228
2024 Q1 62,255,312 $1,836,460,607 +$15,602,554 $29.50 219
2023 Q4 642,409 $23,500,671 -$1,060,487 $36.57 3
2023 Q3 59,320,172 $2,200,198,070 +$118,779,908 $37.09 211
2023 Q2 54,942,003 $1,900,487,256 -$92,244,485 $34.59 222
2023 Q1 56,843,577 $2,905,817,153 -$26,123,172 $51.12 239
2022 Q4 58,350,083 $2,611,315,848 +$48,767,438 $44.74 227
2022 Q3 54,278,850 $2,205,521,261 +$15,294,664 $40.60 214
2022 Q2 56,206,614 $3,603,976,961 -$75,466,649 $64.33 238
2022 Q1 56,911,942 $3,668,060,831 +$209,206,066 $64.45 234
2021 Q4 53,320,913 $2,936,473,287 +$118,667,354 $55.06 233
2021 Q3 52,382,037 $2,483,791,997 -$4,456,938 $47.42 240
2021 Q2 52,561,992 $3,480,084,050 +$24,220,349 $66.28 245
2021 Q1 53,056,922 $3,749,902,846 -$95,148,088 $70.65 273
2020 Q4 53,378,196 $4,698,887,259 +$3,788,435 $88.06 264
2020 Q3 53,975,589 $4,181,198,736 -$43,786 $77.46 268
2020 Q2 53,896,494 $4,239,362,512 -$107,584,428 $78.66 280
2020 Q1 55,269,807 $3,943,577,540 +$123,381,899 $71.34 251
2019 Q4 53,259,287 $3,681,422,812 -$42,739,279 $69.11 262
2019 Q3 53,793,155 $4,366,439,413 +$79,665,152 $81.17 277
2019 Q2 52,755,205 $3,711,238,295 +$537,328,271 $70.35 268
2019 Q1 47,083,602 $3,017,301,230 -$91,402,006 $64.08 238
2018 Q4 47,483,791 $2,246,298,445 -$67,882,741 $47.29 188
2018 Q3 49,835,585 $2,755,587,717 -$77,902,977 $55.32 207
2018 Q2 51,760,544 $1,970,793,082 +$172,222,426 $38.06 191
2018 Q1 47,058,539 $2,275,856,384 +$91,033,518 $48.32 214
2017 Q4 45,195,327 $2,320,718,415 -$72,739,014 $51.35 215
2017 Q3 46,610,196 $2,418,456,928 +$15,200,740 $51.88 209
2017 Q2 45,904,328 $1,929,725,336 -$40,638,479 $42.09 197
2017 Q1 46,860,219 $1,829,595,852 +$574,713,576 $39.05 187
2016 Q4 36,993,945 $1,117,936,402 +$36,560,864 $30.22 174
2016 Q3 37,719,217 $926,796,255 +$16,178,549 $24.57 159
2016 Q2 37,066,276 $921,466,753 +$159,865,243 $24.86 169
2016 Q1 30,588,696 $621,244,652 +$4,258,969 $20.30 158
2015 Q4 31,179,320 $572,523,561 +$6,857,834 $18.36 146
2015 Q3 30,960,317 $492,538,765 +$4,558,315 $15.91 144
2015 Q2 30,078,719 $440,348,137 +$8,593,853 $14.64 130
2015 Q1 29,924,674 $465,165,308 +$3,915,587 $15.55 129
2014 Q4 29,264,745 $407,432,145 +$6,327,757 $13.92 117
2014 Q3 29,460,872 $324,360,970 +$7,948,407 $11.01 119
2014 Q2 28,684,658 $325,206,153 +$5,064,698 $11.34 118
2014 Q1 29,185,174 $385,595,285 +$225,198 $13.21 108