Stephen Mandel’s Clean Harbors CLH Stock Holding History

Stephen Mandel’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	–	Sell	-1,754,950	Closed	-$503M	–	39
2026 Q1	$503M	Buy	1,754,950 +376,825	+27%	+$103M	4.01%	12
2025 Q4	$323M	Buy	+1,378,125	New	+$315M	2.37%	23

Other funds holding CLH

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Jupiter Topco New York $245B AUM

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 Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

ClearBridge Investments New York $121B AUM 27.52% 1-Year Est. Return

Stephen Mandel's CLH Position: Q2 2026 in Review

Stephen Mandel sold out of Clean Harbors (CLH) in Q2 2026, closing a stake of 1,754,950 shares — an estimated $503M sold.

Stephen Mandel first reported a position in CLH in Q4 2025 and held it in 2 quarters. The position peaked at $503M in Q1 2026. 655 funds tracked by Wall St. Rank hold CLH as of Q2 2026.

Stephen Mandel reported no remaining Clean Harbors position as of Q2 2026 after selling out during the quarter.
Stephen Mandel sold 1,754,950 Clean Harbors shares in Q2 2026, an estimated $503M.
Stephen Mandel first reported a position in Clean Harbors in Q4 2025 and held it in 2 quarters.
Stephen Mandel's Clean Harbors position peaked at $503M in Q1 2026.
655 funds tracked by Wall St. Rank held Clean Harbors as of Q2 2026.

Based on Lone Pine Capital's 13F filing for Q2 2026, filed 14 Aug 2026.