Advanced Drainage Systems
556 hedge funds and large institutions have $10.9B invested in Advanced Drainage Systems in 2026 Q2 according to their latest regulatory filings, with 62 funds opening new positions, 198 increasing their positions, 209 reducing their positions, and 79 closing their positions.
60% more funds holding in top 10
Funds holding in top 10: 5 → 8 (+3)
15% more capital invested
Capital invested by funds: $9.52B → $10.9B (+$1.43B)
1.64% more ownership
Funds ownership: 89.13% → 90.77% (+1.6%)
5% less repeat investments, than reductions
Existing positions increased: 198 | Existing positions reduced: 209
4% less funds holding
Funds holding: 580 → 556 (-24)
22% less first-time investments, than exits
New positions opened: 62 | Existing positions closed: 79
52% less call options, than puts
Call options by funds: $20.8M | Put options by funds: $43.1M
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
First Trust Advisors
Wheaton,
Illinois
|
+$88.1M |
| 2 |
BAMCO Inc
New York
|
+$55.6M |
| 3 |
Balyasny Asset Management
Chicago,
Illinois
|
+$48.6M |
| 4 |
Marshall Wace
London,
United Kingdom
|
+$44M |
| 5 |
Qube Research & Technologies (QRT)
London,
United Kingdom
|
+$41.9M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Pictet Asset Management
Carouge,
Switzerland
|
-$154M |
| 2 |
William Blair Investment Management
Chicago,
Illinois
|
-$89.9M |
| 3 |
Adage Capital Partners
Boston,
Massachusetts
|
-$57.2M |
| 4 |
Alyeska Investment Group
Chicago,
Illinois
|
-$35.4M |
| 5 |
Wellington Management Group
Boston,
Massachusetts
|
-$31.8M |
WMS Hedge Fund Activity: Q2 2026 in Review
556 of the 8,348 institutional investors tracked by Wall St. Rank reported a position in Advanced Drainage Systems (WMS) for Q2 2026, worth a combined $10.9B — up 15% from $9.52B a quarter earlier.
Sellers outnumbered buyers: 79 funds closed out of WMS and 62 opened new positions — a net loss of 17 holders — while 209 trimmed existing stakes and 198 added.
The largest buyer was First Trust Advisors, adding an estimated $88.1M. The largest seller was Pictet Asset Management, cutting an estimated $154M.
- 556 institutional investors held Advanced Drainage Systems (WMS) as of Q2 2026, down from 580 in Q1 2026.
- Funds reported $10.9B of Advanced Drainage Systems stock for Q2 2026, up 15% quarter-over-quarter.
- 62 funds opened new Advanced Drainage Systems positions in Q2 2026 and 79 closed out, a net change of -17 holders.
- The largest Advanced Drainage Systems buyer in Q2 2026 was First Trust Advisors, an estimated $88.1M added.
- The largest Advanced Drainage Systems seller in Q2 2026 was Pictet Asset Management, an estimated $154M sold.
Based on aggregated 13F filings for Q2 2026.