WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC
Position in MRCY — Mercury Systems Inc
CIK 1644956
CHICAGO, IL
Position in MRCY
as of Jun 30, 2026
· filed Aug 12, 2026
Position Value
$46,452,615
+$22,590,047 QoQ
Shares Held
379,732
+16.0% QoQ
Ownership
0.632%
of shares outstanding
% of Portfolio
0.14%
of 13F equity value
Holder Rank
#43
of 386 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority
Sole 76%
Shared 0%
None 24%
Common Shares in MRCY Over Time
Shares Held
Position Value (USD)
Position in Aerospace & Defense
Industrials · as of Jun 30, 2026WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC holds $993,100,622 across 12 Aerospace & Defense names. MRCY ranks #6 (4.7% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | GE |
General Electric Co
|
790,801 | $295,546,057 | |
| 2 | CW |
Curtiss Wright Corp
|
317,306 | $240,441,794 | |
| 3 | BWXT |
BWX Technologies, Inc.
|
941,233 | $183,211,003 | |
| 4 | SPCX |
Space Exploration Technologies Corp
|
349,477 | $59,711,640 | |
| 5 | KRMN |
Karman Holdings Inc.
|
977,462 | $48,794,903 | |
| 6 | MRCY |
Mercury Systems Inc
This page
|
379,732 | $46,452,615 | |
| 7 | MDA |
MDA Space Ltd.
|
928,044 | $38,309,656 | |
| 8 | DPC |
DPC Holdings Ltd
|
640,005 | $31,398,645 |
All Filings in MRCY
Export CSV
28 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $46,452,615 | 379,732 | Shares | Sole | 2026-08-12 | |
| 2026-03-31 | $23,862,568 | 327,288 | Shares | Sole | 2026-05-08 | |
| 2025-12-31 | $71,861,771 | 984,273 | Shares | Sole | 2026-02-09 | |
| 2025-09-30 | $195,522,694 | 2,526,133 | Shares | Sole | 2025-11-12 | |
| 2025-09-30 | $192,567,871 | 2,487,957 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $252,909,486 | 4,695,683 | Shares | Sole | 2025-07-29 | |
| 2025-03-31 | $231,488,011 | 5,372,198 | Shares | Sole | 2025-05-09 | |
| 2024-12-31 | $270,169,242 | 6,432,601 | Shares | Sole | 2025-02-10 | |
| 2024-12-31 | $270,169,242 | 6,432,601 | Shares | Sole | 2025-02-12 | |
| 2024-09-30 | $270,081,944 | 7,299,512 | Shares | Sole | 2024-11-08 | |
| 2024-06-30 | $173,179,958 | 6,416,449 | Shares | Sole | 2024-08-08 | |
| 2024-03-31 | $188,196,017 | 6,379,526 | Shares | Sole | 2024-05-08 | |
| 2023-12-31 | $239,781,152 | 6,556,772 | Shares | Sole | 2024-02-09 | |
| 2023-09-30 | $250,341,254 | 6,749,562 | Shares | Sole | 2023-11-09 | |
| 2023-06-30 | $185,840,205 | 5,372,657 | Shares | Sole | 2023-08-11 | |
| 2023-03-31 | $273,408,060 | 5,348,358 | Shares | Sole | 2023-05-12 | |
| 2022-12-31 | $232,915,008 | 5,205,968 | Shares | Sole | 2023-02-09 | |
| 2022-09-30 | $213,740,364 | 5,264,541 | Shares | Sole | 2022-11-09 | |
| 2022-06-30 | $287,771,827 | 4,473,369 | Shares | Sole | 2022-08-10 | |
| 2022-03-31 | $296,921,021 | 4,606,998 | Shares | Sole | 2022-05-11 | |
| 2021-12-31 | $182,679,279 | 3,317,822 | Shares | Sole | 2022-02-14 | |
| 2021-09-30 | $158,772,213 | 3,348,212 | Shares | Sole | 2021-11-10 | |
| 2021-06-30 | $224,412,613 | 3,385,827 | Shares | Sole | 2021-08-12 | |
| 2021-03-31 | $230,929,698 | 3,268,644 | Shares | Sole | 2021-05-13 | |
| 2020-12-31 | $286,156,605 | 3,249,564 | Shares | Sole | 2021-02-09 | |
| 2020-09-30 | $213,933,288 | 2,761,855 | Shares | Sole | 2020-11-06 | |
| 2020-06-30 | $165,588,739 | 2,105,120 | Shares | Sole | 2020-08-12 | |
| 2020-03-31 | $153,431,580 | 2,150,709 | Shares | Sole | 2020-05-08 | |
| No filing history on record for this holder in this stock. | ||||||