Advanced Drainage Systems
579 hedge funds and large institutions have $9.52B invested in Advanced Drainage Systems in 2026 Q1 according to their latest regulatory filings, with 97 funds opening new positions, 229 increasing their positions, 167 reducing their positions, and 56 closing their positions.
73% more first-time investments, than exits
New positions opened: 97 | Existing positions closed: 56
37% more repeat investments, than reductions
Existing positions increased: 229 | Existing positions reduced: 167
30% more call options, than puts
Call options by funds: $17.3M | Put options by funds: $13.3M
6% more funds holding
Funds holding: 547 → 579 (+32)
2.37% less ownership
Funds ownership: 91.5% → 89.13% (-2.4%)
8% less capital invested
Capital invested by funds: $10.3B → $9.52B (-$794M)
17% less funds holding in top 10
Funds holding in top 10: 6 → 5 (-1)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Pictet Asset Management
Carouge,
Switzerland
|
+$84.5M |
| 2 |
Adage Capital Partners
Boston,
Massachusetts
|
+$61.9M |
| 3 |
Qube Research & Technologies (QRT)
London,
United Kingdom
|
+$50.4M |
| 4 |
BlackRock
New York
|
+$48.1M |
| 5 |
Capital World Investors
Los Angeles,
California
|
+$40.7M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
-$120M |
| 2 |
IC
Impactive Capital
New York City,
New York
|
-$93M |
| 3 |
Balyasny Asset Management
Chicago,
Illinois
|
-$70.5M |
| 4 |
Canada Pension Plan Investment Board
Toronto Ontario,
Ontario, Canada
|
-$64.7M |
| 5 |
First Trust Advisors
Wheaton,
Illinois
|
-$58.6M |
WMS Hedge Fund Activity: Q1 2026 in Review
579 of the 8,190 institutional investors tracked by Wall St. Rank reported a position in Advanced Drainage Systems (WMS) for Q1 2026, worth a combined $9.52B — down 7.7% from $10.3B a quarter earlier.
Buyers outnumbered sellers: 97 funds opened new WMS positions and 56 closed out — a net gain of 41 holders — while 229 added to existing stakes and 167 trimmed.
The largest buyer was Pictet Asset Management, adding an estimated $84.5M. The largest seller was Citadel Advisors, cutting an estimated $120M.
- 579 institutional investors held Advanced Drainage Systems (WMS) as of Q1 2026, up from 547 in Q4 2025.
- Funds reported $9.52B of Advanced Drainage Systems stock for Q1 2026, down 7.7% quarter-over-quarter.
- 97 funds opened new Advanced Drainage Systems positions in Q1 2026 and 56 closed out, a net change of +41 holders.
- The largest Advanced Drainage Systems buyer in Q1 2026 was Pictet Asset Management, an estimated $84.5M added.
- The largest Advanced Drainage Systems seller in Q1 2026 was Citadel Advisors, an estimated $120M sold.
Based on aggregated 13F filings for Q1 2026.