CLEAN HARBORS INC

Ticker: CLH CUSIP: 184496107 Class: EQTY

HighVista Strategies LLC's Holding History (CIK: 0001335325)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 6,243 Value ($000) $1,464 Avg Close $228.49 Range $201.34 - $248.07

Q3 2025

Shares 9,106 Value ($000) $2,115 Avg Close $236.75 Range $218.46 - $251.43

Q4 2016

Shares 55,200 Value ($000) $3,072 Avg Close $50.41 Range $43.03 - $58.23

Q4 2015

Shares 24,609 Value ($000) $1,025 Avg Close $43.45 Range $39.89 - $48.05

Q3 2015

Shares 78,415 Value ($000) $3,448 Avg Close $49.63 Range $43.00 - $54.31

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	6,243	$1,464	$228.49	$201.34 - $248.07
Q3 2025	9,106	$2,115	$236.75	$218.46 - $251.43
Q4 2016	55,200	$3,072	$50.41	$43.03 - $58.23
Q4 2015	24,609	$1,025	$43.45	$39.89 - $48.05
Q3 2015	78,415	$3,448	$49.63	$43.00 - $54.31