Advanced Drainage Systems
500 hedge funds and large institutions have $10.1B invested in Advanced Drainage Systems in 2025 Q3 according to their latest regulatory filings, with 73 funds opening new positions, 170 increasing their positions, 185 reducing their positions, and 52 closing their positions.
137% more call options, than puts
Call options by funds: $29.8M | Put options by funds: $12.6M
80% more funds holding in top 10
Funds holding in top 10: 5 → 9 (+4)
40% more first-time investments, than exits
New positions opened: 73 | Existing positions closed: 52
21% more capital invested
Capital invested by funds: $8.34B → $10.1B (+$1.76B)
4% more funds holding
Funds holding: 483 → 500 (+17)
0.15% more ownership
Funds ownership: 93.54% → 93.7% (+0.15%)
8% less repeat investments, than reductions
Existing positions increased: 170 | Existing positions reduced: 185
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Wellington Management Group
Boston,
Massachusetts
|
+$109M |
| 2 |
Citadel Advisors
Miami,
Florida
|
+$67.8M |
| 3 |
IP
Interval Partners
New York
|
+$63M |
| 4 |
SCM
SG Capital Management
Chicago,
Illinois
|
+$43.2M |
| 5 |
Morgan Stanley
New York
|
+$42.9M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Impax Asset Management Group
London,
United Kingdom
|
-$71.4M |
| 2 |
Pictet Asset Management
Carouge,
Switzerland
|
-$69.9M |
| 3 |
Amundi
Paris,
France
|
-$58.2M |
| 4 |
UBS AM
Chicago,
Illinois
|
-$39.5M |
| 5 |
ZP
Zimmer Partners
New York
|
-$31M |
WMS Hedge Fund Activity: Q3 2025 in Review
500 of the 7,639 institutional investors tracked by Wall St. Rank reported a position in Advanced Drainage Systems (WMS) for Q3 2025, worth a combined $10.1B — up 21% from $8.34B a quarter earlier.
Buyers outnumbered sellers: 73 funds opened new WMS positions and 52 closed out — a net gain of 21 holders — while 170 added to existing stakes and 185 trimmed.
The largest buyer was Wellington Management Group, adding an estimated $109M. The largest seller was Impax Asset Management Group, cutting an estimated $71.4M.
- 500 institutional investors held Advanced Drainage Systems (WMS) as of Q3 2025, up from 483 in Q2 2025.
- Funds reported $10.1B of Advanced Drainage Systems stock for Q3 2025, up 21% quarter-over-quarter.
- 73 funds opened new Advanced Drainage Systems positions in Q3 2025 and 52 closed out, a net change of +21 holders.
- The largest Advanced Drainage Systems buyer in Q3 2025 was Wellington Management Group, an estimated $109M added.
- The largest Advanced Drainage Systems seller in Q3 2025 was Impax Asset Management Group, an estimated $71.4M sold.
Based on aggregated 13F filings for Q3 2025.