William Blair Investment Management
CLH icon

William Blair Investment Management’s Clean Harbors CLH Stock Holding History

William Blair Investment Management’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 		$125M Sell
419,210
-23,888
-5% -$7.06M 0.38% 78
2026
Q1 		$127M Buy
443,098
+103,747
+31% +$28.3M 0.42% 65
2025
Q4 		$79.6M Sell
339,351
-45,007
-12% -$10.3M 0.22% 116
2025
Q3 		$89.3M Sell
384,358
-27,074
-7% -$6.41M 0.23% 113
2025
Q2 		$95.1M Buy
+411,432
New +$90.1M 0.25% 101

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 Investment Management's CLH Position: Q2 2026 in Review

William Blair Investment Management reduced its Clean Harbors (CLH) stake by 5.4% in Q2 2026, selling an estimated $7.06M and leaving 419,210 shares worth $125M. The position accounts for 0.38% of the portfolio, ranked #78.

William Blair Investment Management first reported a position in CLH in Q2 2025 and has held it in 5 quarters since. The position peaked at $127M in Q1 2026. 660 funds tracked by Wall St. Rank hold CLH as of Q2 2026.

  • William Blair Investment Management held 419,210 shares of Clean Harbors worth $125M as of Q2 2026.
  • William Blair Investment Management sold 23,888 Clean Harbors shares in Q2 2026, an estimated $7.06M.
  • Clean Harbors made up 0.38% of William Blair Investment Management's portfolio in Q2 2026, its #78 holding.
  • William Blair Investment Management first reported a position in Clean Harbors in Q2 2025 and has held it in 5 quarters since.
  • William Blair Investment Management's Clean Harbors position peaked at $127M in Q1 2026.
  • 660 funds tracked by Wall St. Rank held Clean Harbors as of Q2 2026.

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