William Blair & Company
CLH icon

William Blair & Company’s Clean Harbors CLH Stock Holding History

William Blair & Company’s Portfolio CLH Stock Details CLH Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$541K Sell
1,811
-840
-32% -$248K ﹤0.01% 1202
2026
Q1 		$760K Buy
2,651
+663
+33% +$181K ﹤0.01% 1024
2025
Q4 		$466K Sell
1,988
-45
-2% -$10.3K ﹤0.01% 1166
2025
Q3 		$472K Sell
2,033
-139
-6% -$32.9K ﹤0.01% 1135
2025
Q2 		$502K Buy
2,172
+237
+12% +$51.9K ﹤0.01% 1084
2025
Q1 		$381K Hold
1,935
– – ﹤0.01% 1168
2024
Q4 		$445K Hold
1,935
– – ﹤0.01% 1132
2024
Q3 		$468K Hold
1,935
– – ﹤0.01% 1135
2024
Q2 		$438K Sell
1,935
-5
-0.3% -$1.05K ﹤0.01% 1133
2024
Q1 		$391K Buy
1,940
+5
+0.3% +$899 ﹤0.01% 1156
2023
Q4 		$338K Hold
1,935
– – ﹤0.01% 1200
2023
Q3 		$324K Hold
1,935
– – ﹤0.01% 1199
2023
Q2 		$318K Hold
1,935
– – ﹤0.01% 1227
2023
Q1 		$276K Hold
1,935
– – ﹤0.01% 1269
2022
Q4 		$221K Buy
+1,935
New +$226K ﹤0.01% 1334
2014
Q2 		– Sell
-14,465
Closed -$793K – 2088
2014
Q1 		$793K Sell
14,465
-74,553
-84% -$4.06M ﹤0.01% 1485
2013
Q4 		$5.34M Sell
89,018
-1,799,615
-95% -$104M 0.01% 928
2013
Q3 		$111M Sell
1,888,633
-109,346
-5% -$6.1M 0.2% 154
2013
Q2 		$101M Buy
+1,997,979
New +$111M 0.2% 148

Other funds holding CLH

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
JT
Jupiter Topco New York $245B AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
DCP
D1 Capital Partners New York $34.8B AUM 11.34% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
ClearBridge Investments
ClearBridge Investments New York $121B AUM 27.52% 1-Year Est. Return

William Blair & Company's CLH Position: Q2 2026 in Review

William Blair & Company reduced its Clean Harbors (CLH) stake by 32% in Q2 2026, selling an estimated $248K and leaving 1,811 shares worth $541K. The position accounts for ﹤0.01% of the portfolio, ranked #1202.

William Blair & Company first reported a position in CLH in Q2 2013 and has held it in 19 quarters since. The position peaked at $111M in Q3 2013. 660 funds tracked by Wall St. Rank hold CLH as of Q2 2026.

  • William Blair & Company held 1,811 shares of Clean Harbors worth $541K as of Q2 2026.
  • William Blair & Company sold 840 Clean Harbors shares in Q2 2026, an estimated $248K.
  • Clean Harbors made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #1202 holding.
  • William Blair & Company first reported a position in Clean Harbors in Q2 2013 and has held it in 19 quarters since.
  • William Blair & Company's Clean Harbors position peaked at $111M in Q3 2013.
  • 660 funds tracked by Wall St. Rank held Clean Harbors as of Q2 2026.

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