ANDOVER, MA
MERCURY SYSTEMS INCMRCY— Latest position per institution from SEC 13F filings
15
Institutional holders
66.36M
Total shares held
5.11B
Estimated value
3.32M
Avg. position size
BLACKROCK, INC.
CIK 2012383
Shares
9.37M
Value
1.15B
Filed
Jun 30, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
8.81M
Value
237.75M
Filed
Jun 30, 2024
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM
CIK 1081019
Shares
7.63M
Value
62.37K
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
5.63M
Value
411.20M
Filed
Dec 31, 2025
JANA PARTNERS LLC
CIK 1159159
Shares
4.39M
Value
152.01M
Filed
Jun 30, 2023
JANA PARTNERS MANAGEMENT, LP
CIK 1998597
Shares
3.96M
Value
484.29M
Filed
Jun 30, 2026
STATE STREET CORP
CIK 93751
Shares
3.42M
Value
418.05M
Filed
Jun 30, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
3.03M
Value
370.84M
Filed
Jun 30, 2026
INVESCO LTD.
CIK 914208
Shares
2.67M
Value
326.55M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
2.42M
Value
296.36M
Filed
Jun 30, 2026
STARBOARD VALUE LP
CIK 1517137
Shares
2.29M
Value
61.92M
Filed
Jun 30, 2024
FMR LLC
CIK 315066
Shares
1.84M
Value
225.34M
Filed
Jun 30, 2026
T. ROWE PRICE INVESTMENT MANAGEMENT, INC.
CIK 1897612
Shares
1.60M
Value
195.20K
Filed
Jun 30, 2026
GOLDMAN SACHS GROUP INC
CIK 886982
Shares
1.58M
Value
192.76M
Filed
Jun 30, 2026
CONESTOGA CAPITAL ADVISORS, LLC
CIK 1163744
Shares
1.49M
Value
181.93M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
1.46M
Value
178.58M
Filed
Jun 30, 2026
FIRST TRUST ADVISORS LP
CIK 1125816
Shares
1.30M
Value
158.90M
Filed
Jun 30, 2026
PRICE T ROWE ASSOCIATES INC /MD/
CIK 80255
Shares
1.29M
Value
157.26K
Filed
Jun 30, 2026
DIMENSIONAL FUND ADVISORS LP
CIK 354204
Shares
1.16M
Value
141.44M
Filed
Jun 30, 2026
SEGALL BRYANT & HAMILL, LLC
CIK 1006378
Shares
1.03M
Value
125.94M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | BLACKROCK, INC. | 2012383 | 9.37M | 1.15B | Jun 30, 2026 |
| 2 | BLACKROCK FINANCE, INC. | 1364742 | 8.81M | 237.75M | Jun 30, 2024 |
| 3 | CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 1081019 | 7.63M | 62.37K | Jun 30, 2026 |
| 4 | VANGUARD GROUP INC | 102909 | 5.63M | 411.20M | Dec 31, 2025 |
| 5 | JANA PARTNERS LLC | 1159159 | 4.39M | 152.01M | Jun 30, 2023 |
| 6 | JANA PARTNERS MANAGEMENT, LP | 1998597 | 3.96M | 484.29M | Jun 30, 2026 |
| 7 | STATE STREET CORP | 93751 | 3.42M | 418.05M | Jun 30, 2026 |
| 8 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 3.03M | 370.84M | Jun 30, 2026 |
| 9 | INVESCO LTD. | 914208 | 2.67M | 326.55M | Jun 30, 2026 |
| 10 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 2.42M | 296.36M | Jun 30, 2026 |
| 11 | STARBOARD VALUE LP | 1517137 | 2.29M | 61.92M | Jun 30, 2024 |
| 12 | FMR LLC | 315066 | 1.84M | 225.34M | Jun 30, 2026 |
| 13 | T. ROWE PRICE INVESTMENT MANAGEMENT, INC. | 1897612 | 1.60M | 195.20K | Jun 30, 2026 |
| 14 | GOLDMAN SACHS GROUP INC | 886982 | 1.58M | 192.76M | Jun 30, 2026 |
| 15 | CONESTOGA CAPITAL ADVISORS, LLC | 1163744 | 1.49M | 181.93M | Jun 30, 2026 |
| 16 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 1.46M | 178.58M | Jun 30, 2026 |
| 17 | FIRST TRUST ADVISORS LP | 1125816 | 1.30M | 158.90M | Jun 30, 2026 |
| 18 | PRICE T ROWE ASSOCIATES INC /MD/ | 80255 | 1.29M | 157.26K | Jun 30, 2026 |
| 19 | DIMENSIONAL FUND ADVISORS LP | 354204 | 1.16M | 141.44M | Jun 30, 2026 |
| 20 | SEGALL BRYANT & HAMILL, LLC | 1006378 | 1.03M | 125.94M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.