Mercury Systems
MRCY
325 hedge funds and large institutions have $5.02B invested in Mercury Systems in 2025 Q3 according to their latest regulatory filings, with 69 funds opening new positions, 108 increasing their positions, 109 reducing their positions, and 26 closing their positions.
200% more funds holding in top 10
Funds holding in top 10: 2 → 6 (+4)
165% more first-time investments, than exits
New positions opened: 69 | Existing positions closed: 26
43% more capital invested
Capital invested by funds: $3.5B → $5.02B (+$1.52B)
15% more call options, than puts
Call options by funds: $9.78M | Put options by funds: $8.5M
14% more funds holding
Funds holding: 284 → 325 (+41)
0.76% less ownership
Funds ownership: 108.82% → 108.06% (-0.76%)
1% less repeat investments, than reductions
Existing positions increased: 108 | Existing positions reduced: 109
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Invesco
Atlanta,
Georgia
|
+$58.7M |
| 2 |
T. Rowe Price Associates
Baltimore,
Maryland
|
+$51.1M |
| 3 |
First Trust Advisors
Wheaton,
Illinois
|
+$46.7M |
| 4 |
T. Rowe Price Investment Management
Baltimore,
Maryland
|
+$34.4M |
| 5 |
Jennison Associates
New York
|
+$33.4M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
William Blair Investment Management
Chicago,
Illinois
|
-$137M |
| 2 |
Victory Capital Management
San Antonio,
Texas
|
-$62.9M |
| 3 |
JPM
JANA Partners Management
New York
|
-$49.4M |
| 4 |
Millennium Management
New York
|
-$30.2M |
| 5 |
SCM
Scopia Capital Management
New York
|
-$24.1M |
MRCY Hedge Fund Activity: Q3 2025 in Review
325 of the 7,620 institutional investors tracked by Wall St. Rank reported a position in Mercury Systems (MRCY) for Q3 2025, worth a combined $5.02B — up 43% from $3.5B a quarter earlier.
Buyers outnumbered sellers: 69 funds opened new MRCY positions and 26 closed out — a net gain of 43 holders — while 108 added to existing stakes and 109 trimmed.
The largest buyer was Invesco, adding an estimated $58.7M. The largest seller was William Blair Investment Management, cutting an estimated $137M.
- 325 institutional investors held Mercury Systems (MRCY) as of Q3 2025, up from 284 in Q2 2025.
- Funds reported $5.02B of Mercury Systems stock for Q3 2025, up 43% quarter-over-quarter.
- 69 funds opened new Mercury Systems positions in Q3 2025 and 26 closed out, a net change of +43 holders.
- The largest Mercury Systems buyer in Q3 2025 was Invesco, an estimated $58.7M added.
- The largest Mercury Systems seller in Q3 2025 was William Blair Investment Management, an estimated $137M sold.
Based on aggregated 13F filings for Q3 2025.