Advanced Drainage Systems
547 hedge funds and large institutions have $10.3B invested in Advanced Drainage Systems in 2025 Q4 according to their latest regulatory filings, with 92 funds opening new positions, 161 increasing their positions, 214 reducing their positions, and 38 closing their positions.
142% more first-time investments, than exits
New positions opened: 92 | Existing positions closed: 38
9% more funds holding
Funds holding: 500 → 547 (+47)
6% more call options, than puts
Call options by funds: $31.8M | Put options by funds: $30.1M
2% more capital invested
Capital invested by funds: $10.1B → $10.3B (+$213M)
2.2% less ownership
Funds ownership: 93.7% → 91.5% (-2.2%)
25% less repeat investments, than reductions
Existing positions increased: 161 | Existing positions reduced: 214
33% less funds holding in top 10
Funds holding in top 10: 9 → 6 (-3)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Amundi
Paris,
France
|
+$82.9M |
| 2 |
Balyasny Asset Management
Chicago,
Illinois
|
+$59.6M |
| 3 |
Citadel Advisors
Miami,
Florida
|
+$35M |
| 4 |
Qube Research & Technologies (QRT)
London,
United Kingdom
|
+$29.4M |
| 5 |
QCM
Quantinno Capital Management
New York
|
+$20.5M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
IP
Interval Partners
New York
|
-$108M |
| 2 |
Impax Asset Management Group
London,
United Kingdom
|
-$62.7M |
| 3 |
Pictet Asset Management
Carouge,
Switzerland
|
-$59.8M |
| 4 |
Morgan Stanley
New York
|
-$42.1M |
| 5 |
UBS AM
Chicago,
Illinois
|
-$37.1M |
WMS Hedge Fund Activity: Q4 2025 in Review
547 of the 8,267 institutional investors tracked by Wall St. Rank reported a position in Advanced Drainage Systems (WMS) for Q4 2025, worth a combined $10.3B — up 2.1% from $10.1B a quarter earlier.
Buyers outnumbered sellers: 92 funds opened new WMS positions and 38 closed out — a net gain of 54 holders — while 161 added to existing stakes and 214 trimmed.
The largest buyer was Amundi, adding an estimated $82.9M. The largest seller was Interval Partners, cutting an estimated $108M.
- 547 institutional investors held Advanced Drainage Systems (WMS) as of Q4 2025, up from 500 in Q3 2025.
- Funds reported $10.3B of Advanced Drainage Systems stock for Q4 2025, up 2.1% quarter-over-quarter.
- 92 funds opened new Advanced Drainage Systems positions in Q4 2025 and 38 closed out, a net change of +54 holders.
- The largest Advanced Drainage Systems buyer in Q4 2025 was Amundi, an estimated $82.9M added.
- The largest Advanced Drainage Systems seller in Q4 2025 was Interval Partners, an estimated $108M sold.
Based on aggregated 13F filings for Q4 2025.