Impax Asset Management Group
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Impax Asset Management Group’s Advanced Drainage Systems WMS Stock Holding History

Impax Asset Management Group’s Portfolio WMS Stock Details WMS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$264M Sell
1,927,510
-139,213
-7% -$21.5M 1.84% 13
2025
Q4 		$299M Sell
2,066,723
-433,353
-17% -$62.7M 1.87% 13
2025
Q3 		$346M Sell
2,500,076
-543,833
-18% -$71.4M 2.02% 11
2025
Q2 		$349M Buy
3,043,909
+139,495
+5% +$15.6M 2% 9
2025
Q1 		$315M Buy
2,904,414
+374,414
+15% +$43.6M 1.9% 12
2024
Q4 		$292M Buy
2,530,000
+650,052
+35% +$90.2M 1.32% 23
2024
Q3 		$295M Sell
1,879,948
-196,328
-9% -$30.7M 1.16% 28
2024
Q2 		$332M Sell
2,076,276
-302,206
-13% -$50.5M 1.35% 21
2024
Q1 		$409M Sell
2,378,482
-328,224
-12% -$49.4M 1.56% 13
2023
Q4 		$380M Sell
2,706,706
-309,029
-10% -$37.3M 1.52% 14
2023
Q3 		$343M Sell
3,015,735
-471,872
-14% -$57.6M 1.53% 14
2023
Q2 		$396M Sell
3,487,607
-54,613
-2% -$5.15M 1.59% 15
2023
Q1 		$298M Buy
3,542,220
+740,194
+26% +$65.1M 1.24% 25
2022
Q4 		$229M Buy
2,802,026
+300,189
+12% +$30.4M 1.03% 33
2022
Q3 		$310M Sell
2,501,837
-282,619
-10% -$35.2M 1.59% 13
2022
Q2 		$250M Sell
2,784,456
-12,158
-0.4% -$1.25M 1.22% 23
2022
Q1 		$331M Buy
2,796,614
+15,778
+0.6% +$1.87M 1.37% 20
2021
Q4 		$378M Sell
2,780,836
-195,901
-7% -$24.1M 1.38% 19
2021
Q3 		$321M Buy
2,976,737
+273,343
+10% +$31.5M 1.32% 20
2021
Q2 		$314M Buy
2,703,394
+56,701
+2% +$6.3M 1.39% 18
2021
Q1 		$273M Sell
2,646,693
-236,955
-8% -$23.2M 1.4% 18
2020
Q4 		$240M Sell
2,883,648
-88,632
-3% -$6.28M 1.53% 16
2020
Q3 		$185M Sell
2,972,280
-165,476
-5% -$8.96M 1.62% 14
2020
Q2 		$155M Buy
3,137,756
+148,441
+5% +$6.1M 1.59% 14
2020
Q1 		$87.7M Sell
2,989,315
-3,811
-0.1% -$154K 1.17% 29
2019
Q4 		$116M Buy
2,993,126
+36,567
+1% +$1.35M 1.29% 28
2019
Q3 		$95M Sell
2,956,559
-634,016
-18% -$20.6M 1.24% 29
2019
Q2 		$118M Sell
3,590,575
-92,742
-3% -$2.67M 1.53% 20
2019
Q1 		$94.9M Buy
3,683,317
+219,027
+6% +$5.54M 1.31% 26
2018
Q4 		$84M Buy
3,464,290
+14,832
+0.4% +$399K 1.37% 22
2018
Q3 		$106M Buy
+3,449,458
New +$105M 1.52% 16

Other funds holding WMS

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
UBS AM
UBS AM Chicago, Illinois $481B AUM 26.39% 1-Year Est. Return
Pictet Asset Management
Pictet Asset Management Carouge, Switzerland $94.8B AUM 24.11% 1-Year Est. Return
Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $97.9B AUM 20.73% 1-Year Est. Return
First Trust Advisors
First Trust Advisors Wheaton, Illinois $140B AUM 27.84% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Impax Asset Management Group's WMS Position: Q1 2026 in Review

Impax Asset Management Group reduced its Advanced Drainage Systems (WMS) stake by 6.7% in Q1 2026, selling an estimated $21.5M and leaving 1,927,510 shares worth $264M. The position accounts for 1.84% of the portfolio, ranked #13.

Impax Asset Management Group first reported a position in WMS in Q3 2018 and has held it in 31 quarters since. The position peaked at $409M in Q1 2024. 576 funds tracked by Wall St. Rank hold WMS as of Q1 2026.

  • Impax Asset Management Group held 1,927,510 shares of Advanced Drainage Systems worth $264M as of Q1 2026.
  • Impax Asset Management Group sold 139,213 Advanced Drainage Systems shares in Q1 2026, an estimated $21.5M.
  • Advanced Drainage Systems made up 1.84% of Impax Asset Management Group's portfolio in Q1 2026, its #13 holding.
  • Impax Asset Management Group first reported a position in Advanced Drainage Systems in Q3 2018 and has held it in 31 quarters since.
  • Impax Asset Management Group's Advanced Drainage Systems position peaked at $409M in Q1 2024.
  • 576 funds tracked by Wall St. Rank held Advanced Drainage Systems as of Q1 2026.

Based on Impax Asset Management Group's 13F filing for Q1 2026, filed 12 May 2026.