CLEAN HARBORS INC

Ticker: CLH CUSIP: 184496107 Class: EQTY

ESSEX INVESTMENT MANAGEMENT CO LLC's Holding History (CIK: 0000201772)

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

Q4 2025

Shares 193 Value ($000) $45 Avg Close $228.49 Range $201.34 - $248.07

Q3 2025

Shares 193 Value ($000) $45 Avg Close $236.75 Range $218.46 - $251.43

Q2 2025

Shares 193 Value ($000) $45 Avg Close $218.92 Range $178.29 - $235.43

Q1 2025

Shares 193 Value ($000) $38 Avg Close $218.84 Range $186.54 - $247.51

Q4 2024

Shares 193 Value ($000) $44 Avg Close $248.40 Range $220.10 - $267.11

Q3 2024

Shares 467 Value ($000) $113 Avg Close $235.10 Range $217.36 - $251.65

Q2 2024

Shares 467 Value ($000) $106 Avg Close $209.64 Range $189.32 - $231.15

Q1 2024

Shares 532 Value ($000) $107 Avg Close $179.73 Range $161.39 - $202.58

Q4 2023

Shares 746 Value ($000) $130 Avg Close $164.14 Range $132.92 - $179.49

Q3 2023

Shares 6,123 Value ($000) $1,025 Avg Close $168.59 Range $160.37 - $178.33

Q2 2023

Shares 8,800 Value ($000) $1,447 Avg Close $146.18 Range $129.70 - $164.80

Q1 2023

Shares 9,983 Value ($000) $1,423 Avg Close $130.22 Range $110.96 - $144.20

Q4 2022

Shares 14,748 Value ($000) $2 Avg Close $116.83 Range $109.07 - $125.41

Q3 2022

Shares 11,540 Value ($000) $1,269 Avg Close $107.08 Range $83.56 - $124.49

Q2 2022

Shares 11,540 Value ($000) $1,012 Avg Close $96.49 Range $81.56 - $115.00

Q1 2022

Shares 13,270 Value ($000) $1,481 Avg Close $98.73 Range $87.11 - $113.71

Q4 2021

Shares 13,848 Value ($000) $1,382 Avg Close $105.37 Range $90.25 - $118.89

Q3 2021

Shares 13,866 Value ($000) $1,440 Avg Close $98.39 Range $89.03 - $106.90

Q2 2021

Shares 13,866 Value ($000) $1,291 Avg Close $90.87 Range $83.56 - $96.47

Q1 2021

Shares 13,946 Value ($000) $1,172 Avg Close $84.13 Range $73.69 - $91.94

Q4 2020

Shares 3,076 Value ($000) $234 Avg Close $67.02 Range $52.22 - $77.16

Q3 2020

Shares 3,076 Value ($000) $172 Avg Close $59.23 Range $52.29 - $67.07

Q2 2020

Shares 3,076 Value ($000) $184 Avg Close $55.73 Range $44.36 - $71.22

Q2 2013

Shares 5,373 Value ($000) $271 Avg Close $55.73 Range $50.37 - $61.28

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	193	$45	$228.49	$201.34 - $248.07
Q3 2025	193	$45	$236.75	$218.46 - $251.43
Q2 2025	193	$45	$218.92	$178.29 - $235.43
Q1 2025	193	$38	$218.84	$186.54 - $247.51
Q4 2024	193	$44	$248.40	$220.10 - $267.11
Q3 2024	467	$113	$235.10	$217.36 - $251.65
Q2 2024	467	$106	$209.64	$189.32 - $231.15
Q1 2024	532	$107	$179.73	$161.39 - $202.58
Q4 2023	746	$130	$164.14	$132.92 - $179.49
Q3 2023	6,123	$1,025	$168.59	$160.37 - $178.33
Q2 2023	8,800	$1,447	$146.18	$129.70 - $164.80
Q1 2023	9,983	$1,423	$130.22	$110.96 - $144.20
Q4 2022	14,748	$2	$116.83	$109.07 - $125.41
Q3 2022	11,540	$1,269	$107.08	$83.56 - $124.49
Q2 2022	11,540	$1,012	$96.49	$81.56 - $115.00
Q1 2022	13,270	$1,481	$98.73	$87.11 - $113.71
Q4 2021	13,848	$1,382	$105.37	$90.25 - $118.89
Q3 2021	13,866	$1,440	$98.39	$89.03 - $106.90
Q2 2021	13,866	$1,291	$90.87	$83.56 - $96.47
Q1 2021	13,946	$1,172	$84.13	$73.69 - $91.94
Q4 2020	3,076	$234	$67.02	$52.22 - $77.16
Q3 2020	3,076	$172	$59.23	$52.29 - $67.07
Q2 2020	3,076	$184	$55.73	$44.36 - $71.22
Q2 2013	5,373	$271	$55.73	$50.37 - $61.28