William Blair Investment Management
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William Blair Investment Management’s Advanced Drainage Systems WMS Stock Holding History

William Blair Investment Management’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
Q2 		– Sell
-655,684
Closed -$89.9M – 454
2026
Q1 		$89.9M Sell
655,684
-32,363
-5% -$5.01M 0.3% 96
2025
Q4 		$99.6M Sell
688,047
-132,156
-16% -$19.1M 0.28% 100
2025
Q3 		$114M Sell
820,203
-113,392
-12% -$14.9M 0.29% 94
2025
Q2 		$107M Sell
933,595
-79,660
-8% -$8.92M 0.28% 93
2025
Q1 		$110M Sell
1,013,255
-26,844
-3% -$3.13M 0.31% 92
2024
Q4 		$120M Sell
1,040,099
-103,380
-9% -$14.3M 0.29% 103
2024
Q3 		$180M Sell
1,143,479
-286,612
-20% -$44.8M 0.44% 71
2024
Q2 		$229M Buy
1,430,091
+64,618
+5% +$10.8M 0.6% 40
2024
Q1 		$235M Sell
1,365,473
-22,592
-2% -$3.4M 0.61% 41
2023
Q4 		$195M Sell
1,388,065
-57,261
-4% -$6.9M 0.57% 51
2023
Q3 		$165M Buy
1,445,326
+169,517
+13% +$20.7M 0.55% 56
2023
Q2 		$145M Sell
1,275,809
-260,613
-17% -$24.6M 0.47% 72
2023
Q1 		$129M Buy
1,536,422
+327,658
+27% +$28.8M 0.45% 75
2022
Q4 		$99.1M Sell
1,208,764
-72,385
-6% -$7.34M 0.38% 91
2022
Q3 		$159M Buy
1,281,149
+404,015
+46% +$50.3M 0.63% 52
2022
Q2 		$79M Buy
+877,134
New +$90.2M 0.29% 109
2015
Q4 		– Sell
-229,553
Closed -$6.64M – 471
2015
Q3 		$6.64M Buy
+229,553
New +$6.65M 0.01% 768

Other funds holding WMS

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
First Trust Advisors
First Trust Advisors Wheaton, Illinois $170B AUM 46.21% 1-Year Est. Return
UBS AM
UBS AM Chicago, Illinois $550B AUM 43.33% 1-Year Est. Return
Impax Asset Management Group
Impax Asset Management Group London, United Kingdom $15.4B AUM 26.43% 1-Year Est. Return
Baillie Gifford & Co
Baillie Gifford & Co Edinburgh, United Kingdom $110B AUM 4.8% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

William Blair Investment Management's WMS Position: Q2 2026 in Review

William Blair Investment Management sold out of Advanced Drainage Systems (WMS) in Q2 2026, closing a stake of 655,684 shares — an estimated $89.9M sold.

William Blair Investment Management first reported a position in WMS in Q3 2015 and held it in 17 quarters. The position peaked at $235M in Q1 2024. 551 funds tracked by Wall St. Rank hold WMS as of Q2 2026.

  • William Blair Investment Management reported no remaining Advanced Drainage Systems position as of Q2 2026 after selling out during the quarter.
  • William Blair Investment Management sold 655,684 Advanced Drainage Systems shares in Q2 2026, an estimated $89.9M.
  • William Blair Investment Management first reported a position in Advanced Drainage Systems in Q3 2015 and held it in 17 quarters.
  • William Blair Investment Management's Advanced Drainage Systems position peaked at $235M in Q1 2024.
  • 551 funds tracked by Wall St. Rank held Advanced Drainage Systems as of Q2 2026.

Based on William Blair Investment Management's 13F filing for Q2 2026, filed 12 Aug 2026.