Mercury Systems
MRCY
357 hedge funds and large institutions have $4.75B invested in Mercury Systems in 2026 Q1 according to their latest regulatory filings, with 59 funds opening new positions, 133 increasing their positions, 120 reducing their positions, and 42 closing their positions.
40% more first-time investments, than exits
New positions opened: 59 | Existing positions closed: 42
33% more funds holding in top 10
Funds holding in top 10: 6 → 8 (+2)
20% more call options, than puts
Call options by funds: $9.86M | Put options by funds: $8.19M
11% more repeat investments, than reductions
Existing positions increased: 133 | Existing positions reduced: 120
3% more funds holding
Funds holding: 346 → 357 (+11)
1.14% more ownership
Funds ownership: 107.45% → 108.59% (+1.1%)
1% more capital invested
Capital invested by funds: $4.72B → $4.75B (+$30.9M)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Wellington Management Group
Boston,
Massachusetts
|
+$65.8M |
| 2 |
Invesco
Atlanta,
Georgia
|
+$46.2M |
| 3 |
State Street
Boston,
Massachusetts
|
+$38.5M |
| 4 |
Artisan Partners
Milwaukee,
Wisconsin
|
+$30.8M |
| 5 |
American Century Companies
Kansas City,
Missouri
|
+$30M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
JPM
JANA Partners Management
New York
|
-$74.2M |
| 2 |
William Blair Investment Management
Chicago,
Illinois
|
-$57.2M |
| 3 |
Ameriprise
Minneapolis,
Minnesota
|
-$25.9M |
| 4 |
CCA
Conestoga Capital Advisors
Wayne,
Pennsylvania
|
-$22.3M |
| 5 |
Fidelity Investments
Boston,
Massachusetts
|
-$21.6M |
MRCY Hedge Fund Activity: Q1 2026 in Review
357 of the 8,187 institutional investors tracked by Wall St. Rank reported a position in Mercury Systems (MRCY) for Q1 2026, worth a combined $4.75B — up 0.65% from $4.72B a quarter earlier.
Buyers outnumbered sellers: 59 funds opened new MRCY positions and 42 closed out — a net gain of 17 holders — while 133 added to existing stakes and 120 trimmed.
The largest buyer was Wellington Management Group, opening a new position worth an estimated $65.8M. The largest seller was JANA Partners Management, cutting an estimated $74.2M.
- 357 institutional investors held Mercury Systems (MRCY) as of Q1 2026, up from 346 in Q4 2025.
- Funds reported $4.75B of Mercury Systems stock for Q1 2026, up 0.65% quarter-over-quarter.
- 59 funds opened new Mercury Systems positions in Q1 2026 and 42 closed out, a net change of +17 holders.
- The largest Mercury Systems buyer in Q1 2026 was Wellington Management Group, an estimated $65.8M added.
- The largest Mercury Systems seller in Q1 2026 was JANA Partners Management, an estimated $74.2M sold.
Based on aggregated 13F filings for Q1 2026.