HighVista Strategies’s Clean Harbors CLH Stock Holding History

HighVista Strategies’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 Q1	$1.59M	Sell	5,543 -700	-11%	-$191K	0.44%	70
2025 Q4	$1.46M	Sell	6,243 -2,863	-31%	-$654K	0.38%	73
2025 Q3	$2.11M	Buy	+9,106	New	+$2.16M	0.52%	59
2017 Q1	–	Sell	-55,200	Closed	-$3.07M	–	152
2016 Q4	$3.07M	Buy	+55,200	New	+$2.78M	0.6%	47
2016 Q1	–	Sell	-24,609	Closed	-$1.02M	–	174
2015 Q4	$1.02M	Sell	24,609 -53,806	-69%	-$2.34M	0.19%	147
2015 Q3	$3.45M	Buy	+78,415	New	+$3.89M	0.65%	76

Other funds holding CLH

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

LPC

Lone Pine Capital Greenwich, Connecticut $12.5B AUM 54.4% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

DCP

D1 Capital Partners New York $11.2B AUM 15.78% 1-Year Est. Return

Pictet Asset Management Carouge, Switzerland $94.8B AUM 24.11% 1-Year Est. Return

HighVista Strategies's CLH Position: Q1 2026 in Review

HighVista Strategies reduced its Clean Harbors (CLH) stake by 11% in Q1 2026, selling an estimated $191K and leaving 5,543 shares worth $1.59M. The position accounts for 0.44% of the portfolio, ranked #70.

HighVista Strategies first reported a position in CLH in Q3 2015 and has held it in 6 quarters since. The position peaked at $3.45M in Q3 2015. 623 funds tracked by Wall St. Rank hold CLH as of Q1 2026.

HighVista Strategies held 5,543 shares of Clean Harbors worth $1.59M as of Q1 2026.
HighVista Strategies sold 700 Clean Harbors shares in Q1 2026, an estimated $191K.
Clean Harbors made up 0.44% of HighVista Strategies's portfolio in Q1 2026, its #70 holding.
HighVista Strategies first reported a position in Clean Harbors in Q3 2015 and has held it in 6 quarters since.
HighVista Strategies's Clean Harbors position peaked at $3.45M in Q3 2015.
623 funds tracked by Wall St. Rank held Clean Harbors as of Q1 2026.

Based on HighVista Strategies's 13F filing for Q1 2026, filed 15 May 2026.