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Advanced Drainage Systems
WMS

576 hedge funds and large institutions have $9.51B invested in Advanced Drainage Systems in 2026 Q1 according to their latest regulatory filings, with 97 funds opening new positions, 227 increasing their positions, 167 reducing their positions, and 55 closing their positions.

New
Increased
Maintained
Reduced
Closed

76% more first-time investments, than exits

New positions opened: 97 | Existing positions closed: 55

36% more repeat investments, than reductions

Existing positions increased: 227 | 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: 545 → 576 (+31)

2.5% less ownership

Funds ownership: 91.61% → 89.11% (-2.5%)

8% less capital invested

Capital invested by funds: $10.3B → $9.51B (-$798M)

17% less funds holding in top 10

Funds holding in top 10: 6 → 5 (-1)

Holders
576
Holders Change
+31
Holders Change %
+5.69%
% of All Funds
7.09%
Holding in Top 10
5
Holding in Top 10 Change
-1
Holding in Top 10 Change %
-16.67%
% of All Funds
0.06%
New
97
Increased
227
Reduced
167
Closed
55
Calls
$17.3M
Puts
$13.3M
Net Calls
+$3.94M
Net Calls Change
+$2.24M

Top Buyers

1
Pictet Asset Management
Pictet Asset Management
Switzerland
+$84.5M
2
Adage Capital Partners
Adage Capital Partners
Massachusetts
+$61.9M
3
Qube Research & Technologies (QRT)
Qube Research & Technologies (QRT)
United Kingdom
+$50.4M
4
BlackRock
BlackRock
New York
+$48.1M
5
Capital World Investors
Capital World Investors
California
+$40.7M

Top Sellers

1
Citadel Advisors
Citadel Advisors
Florida
-$120M
2
IC
Impactive Capital
New York
-$93M
3
Balyasny Asset Management
Balyasny Asset Management
Illinois
-$70.5M
4
Canada Pension Plan Investment Board
Canada Pension Plan Investment Board
Ontario, Canada
-$64.7M
5
First Trust Advisors
First Trust Advisors
Illinois
-$58.6M
Name Holding Trade Value Shares
Change 		Change in
Stake
CCM
326
Cullen Capital Management
New York
$585K +$41.2K +266 +7%
William Blair & Company
327
William Blair & Company
Illinois
$571K +$645K +4,167 New
FDCDDQ
328
Federation des caisses Desjardins du Quebec
Quebec, Canada
$568K -$200K -1,294 -24%
OBAM
329
ODDO BHF Asset Management
France
$566K +$639K +4,129 New
Nisa Investment Advisors
330
Nisa Investment Advisors
Missouri
$566K +$928 +6 +0.1%
DBRC
331
D.B. Root & Company
Pennsylvania
$556K -$16.6K -107 -3%
SA
332
Sanctuary Advisors
Indiana
$554K -$34.4K -222 -5%
BEC
333
Blue Edge Capital
Virginia
$550K – – –
CG
334
Caprock Group
Idaho
$550K -$699K -4,514 -53%
Two Sigma Investments
335
Two Sigma Investments
New York
$523K +$590K +3,813 New
AWP
336
Abacus Wealth Partners
California
$522K +$1.24K +8 +0.2%
URS
337
Utah Retirement Systems
Utah
$518K – – –
VC
338
VarCov Co
Connecticut
$512K +$578K +3,736 New
DWM
339
Diversify Wealth Management
Utah
$512K +$541K +3,497 New
FGP
340
Freestone Grove Partners
California
$500K +$565K +3,649 New
GCM
341
Graver Capital Management
Ohio
$500K -$235K -1,520 -29%
JAG
342
Journey Advisory Group
Kentucky
$497K +$155 +1 +0%
AA
343
ALPS Advisors
Colorado
$494K +$54.2K +350 +11%
LNWTC
344
Laird Norton Wetherby Trust Company
Washington
$494K -$9.9K -64 -2%
BAM
345
Brave Asset Management
New Jersey
$494K – – –
EI
346
Ethic Inc
New York
$492K +$215K +1,390 +63%
Jones Financial Companies
347
Jones Financial Companies
Missouri
$481K +$255K +1,650 +84%
FRM
348
Fox Run Management
Connecticut
$476K +$224K +1,445 +66%
KPWS
349
Kestra Private Wealth Services
Texas
$475K +$536K +3,465 New
AI
350
AXS Investments
New York
$453K – – –
12 13
14
15 16

WMS Hedge Fund Activity: Q1 2026 in Review

576 of the 8,125 institutional investors tracked by Wall St. Rank reported a position in Advanced Drainage Systems (WMS) for Q1 2026, worth a combined $9.51B — down 7.7% from $10.3B a quarter earlier.

Buyers outnumbered sellers: 97 funds opened new WMS positions and 55 closed out — a net gain of 42 holders — while 227 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.

  • 576 institutional investors held Advanced Drainage Systems (WMS) as of Q1 2026, up from 545 in Q4 2025.
  • Funds reported $9.51B 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 55 closed out, a net change of +42 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.