William Blair & Company
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William Blair & Company’s Advanced Drainage Systems WMS Stock Holding History

William Blair & Company’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 		$716K Buy
4,564
+397
+10% +$56.7K ﹤0.01% 1093
2026
Q1 		$571K Buy
+4,167
New +$645K ﹤0.01% 1108
2024
Q4 		– Sell
-4,756
Closed -$747K – 1891
2024
Q3 		$747K Sell
4,756
-1,560
-25% -$244K ﹤0.01% 993
2024
Q2 		$1.01M Sell
6,316
-275
-4% -$46K ﹤0.01% 873
2024
Q1 		$1.14M Buy
6,591
+40
+0.6% +$6.02K ﹤0.01% 828
2023
Q4 		$921K Sell
6,551
-109
-2% -$13.1K ﹤0.01% 879
2023
Q3 		$758K Sell
6,660
-597
-8% -$72.9K ﹤0.01% 927
2023
Q2 		$826K Buy
7,257
+572
+9% +$54K ﹤0.01% 909
2023
Q1 		$563K Buy
6,685
+1,456
+28% +$128K ﹤0.01% 1003
2022
Q4 		$429K Buy
5,229
+45
+0.9% +$4.56K ﹤0.01% 1092
2022
Q3 		$645K Buy
5,184
+1,727
+50% +$215K ﹤0.01% 967
2022
Q2 		$311K Buy
+3,457
New +$355K ﹤0.01% 1250
2015
Q4 		– Sell
-8,270
Closed -$239K – 1278
2015
Q3 		$239K Buy
+8,270
New +$240K ﹤0.01% 1218

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 & Company's WMS Position: Q2 2026 in Review

William Blair & Company increased its Advanced Drainage Systems (WMS) stake by 9.5% in Q2 2026, buying an estimated $56.7K and bringing the position to 4,564 shares worth $716K. The position accounts for ﹤0.01% of the portfolio, ranked #1093.

William Blair & Company first reported a position in WMS in Q3 2015 and has held it in 13 quarters since. The position peaked at $1.14M in Q1 2024. 554 funds tracked by Wall St. Rank hold WMS as of Q2 2026.

  • William Blair & Company held 4,564 shares of Advanced Drainage Systems worth $716K as of Q2 2026.
  • William Blair & Company bought 397 Advanced Drainage Systems shares in Q2 2026, an estimated $56.7K.
  • Advanced Drainage Systems made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1093 holding.
  • William Blair & Company first reported a position in Advanced Drainage Systems in Q3 2015 and has held it in 13 quarters since.
  • William Blair & Company's Advanced Drainage Systems position peaked at $1.14M in Q1 2024.
  • 554 funds tracked by Wall St. Rank held Advanced Drainage Systems as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.