CLEAN HARBORS INC

Ticker: CLH CUSIP: 184496107 Class: EQTY

COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS's Holding History (CIK: 0001083190)

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

Q4 2025

Shares 12,569 Value ($000) $2,947 Avg Close $228.49 Range $201.34 - $248.07

Q3 2025

Shares 12,939 Value ($000) $3,005 Avg Close $236.75 Range $218.46 - $251.43

Q2 2025

Shares 12,940 Value ($000) $2,991 Avg Close $218.92 Range $178.29 - $235.43

Q1 2025

Shares 12,111 Value ($000) $2,387 Avg Close $218.84 Range $186.54 - $247.51

Q4 2024

Shares 11,190 Value ($000) $2,575 Avg Close $248.40 Range $220.10 - $267.11

Q3 2024

Shares 11,184 Value ($000) $2,703 Avg Close $235.10 Range $217.36 - $251.65

Q2 2024

Shares 11,118 Value ($000) $2,514 Avg Close $209.64 Range $189.32 - $231.15

Q1 2024

Shares 11,127 Value ($000) $2,240 Avg Close $179.73 Range $161.39 - $202.58

Q4 2023

Shares 11,112 Value ($000) $1,939 Avg Close $164.14 Range $132.92 - $179.49

Q3 2023

Shares 10,198 Value ($000) $1,707 Avg Close $168.59 Range $160.37 - $178.33

Q2 2023

Shares 24,323 Value ($000) $3,999 Avg Close $146.18 Range $129.70 - $164.80

Q1 2023

Shares 22,650 Value ($000) $3,229 Avg Close $130.22 Range $110.96 - $144.20

Q4 2022

Shares 22,623 Value ($000) $3 Avg Close $116.83 Range $109.07 - $125.41

Q3 2022

Shares 19,949 Value ($000) $2,194 Avg Close $107.08 Range $83.56 - $124.49

Q2 2022

Shares 23,949 Value ($000) $2,100 Avg Close $96.49 Range $81.56 - $115.00

Q1 2022

Shares 24,737 Value ($000) $2,762 Avg Close $98.73 Range $87.11 - $113.71

Q4 2021

Shares 22,906 Value ($000) $2,285 Avg Close $105.37 Range $90.25 - $118.89

Q3 2021

Shares 21,725 Value ($000) $2,257 Avg Close $98.39 Range $89.03 - $106.90

Q2 2021

Shares 29,741 Value ($000) $2,770 Avg Close $90.87 Range $83.56 - $96.47

Q1 2021

Shares 26,358 Value ($000) $2,216 Avg Close $84.13 Range $73.69 - $91.94

Q4 2020

Shares 34,620 Value ($000) $2,635 Avg Close $67.02 Range $52.22 - $77.16

Q3 2020

Shares 44,639 Value ($000) $2,501 Avg Close $59.23 Range $52.29 - $67.07

Q2 2020

Shares 24,261 Value ($000) $1,455 Avg Close $55.73 Range $44.36 - $71.22

Q1 2020

Shares 20,923 Value ($000) $1,074 Avg Close $73.03 Range $29.45 - $88.40

Q4 2019

Shares 15,742 Value ($000) $1,350 Avg Close $81.27 Range $71.31 - $88.01

Q3 2019

Shares 15,639 Value ($000) $1,207 Avg Close $73.96 Range $67.83 - $80.06

Q2 2019

Shares 14,872 Value ($000) $1,057 Avg Close $69.62 Range $62.54 - $77.24

Q1 2019

Shares 13,971 Value ($000) $999 Avg Close $61.79 Range $48.13 - $72.26

Q4 2018

Shares 21,614 Value ($000) $1,067 Avg Close $62.29 Range $46.21 - $72.46

Q3 2018

Shares 24,412 Value ($000) $1,747 Avg Close $63.60 Range $54.90 - $72.50

Q2 2018

Shares 37,113 Value ($000) $2,062 Avg Close $51.36 Range $44.75 - $56.00

Q1 2018

Shares 34,629 Value ($000) $1,690 Avg Close $52.41 Range $46.62 - $57.97

Q4 2017

Shares 20,830 Value ($000) $1,129 Avg Close $54.14 Range $51.43 - $58.22

Q3 2017

Shares 21,760 Value ($000) $1,234 Avg Close $54.44 Range $49.63 - $58.28

Q2 2017

Shares 13,517 Value ($000) $755 Avg Close $57.50 Range $53.17 - $61.62

Q1 2017

Shares 7,614 Value ($000) $423 Avg Close $55.34 Range $52.77 - $59.17

Q4 2016

Shares 7,732 Value ($000) $430 Avg Close $50.41 Range $43.03 - $58.23

Q3 2016

Shares 7,739 Value ($000) $371 Avg Close $49.57 Range $44.91 - $53.79

Q2 2016

Shares 10,080 Value ($000) $525 Avg Close $50.01 Range $46.40 - $54.54

Q1 2016

Shares 9,370 Value ($000) $462 Avg Close $43.78 Range $37.09 - $49.97

Q4 2015

Shares 15,194 Value ($000) $633 Avg Close $43.45 Range $39.89 - $48.05

Q3 2015

Shares 15,350 Value ($000) $675 Avg Close $49.63 Range $43.00 - $54.31

Q2 2015

Shares 15,425 Value ($000) $829 Avg Close $55.82 Range $50.65 - $59.29

Q1 2015

Shares 13,991 Value ($000) $794 Avg Close $51.78 Range $44.70 - $58.44

Q4 2014

Shares 11,702 Value ($000) $562 Avg Close $48.74 Range $43.05 - $53.84

Q3 2014

Shares 7,658 Value ($000) $413 Avg Close $58.81 Range $53.66 - $65.53

Q2 2014

Shares 7,688 Value ($000) $494 Avg Close $59.46 Range $52.02 - $64.30

Q1 2014

Shares 7,715 Value ($000) $423 Avg Close $54.49 Range $44.95 - $60.47

Q4 2013

Shares 7,747 Value ($000) $465 Avg Close $57.66 Range $51.77 - $64.12

Q3 2013

Shares 7,828 Value ($000) $459 Avg Close $55.80 Range $50.23 - $59.80

Q2 2013

Shares 7,667 Value ($000) $387 Avg Close $55.73 Range $50.37 - $61.28

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	12,569	$2,947	$228.49	$201.34 - $248.07
Q3 2025	12,939	$3,005	$236.75	$218.46 - $251.43
Q2 2025	12,940	$2,991	$218.92	$178.29 - $235.43
Q1 2025	12,111	$2,387	$218.84	$186.54 - $247.51
Q4 2024	11,190	$2,575	$248.40	$220.10 - $267.11
Q3 2024	11,184	$2,703	$235.10	$217.36 - $251.65
Q2 2024	11,118	$2,514	$209.64	$189.32 - $231.15
Q1 2024	11,127	$2,240	$179.73	$161.39 - $202.58
Q4 2023	11,112	$1,939	$164.14	$132.92 - $179.49
Q3 2023	10,198	$1,707	$168.59	$160.37 - $178.33
Q2 2023	24,323	$3,999	$146.18	$129.70 - $164.80
Q1 2023	22,650	$3,229	$130.22	$110.96 - $144.20
Q4 2022	22,623	$3	$116.83	$109.07 - $125.41
Q3 2022	19,949	$2,194	$107.08	$83.56 - $124.49
Q2 2022	23,949	$2,100	$96.49	$81.56 - $115.00
Q1 2022	24,737	$2,762	$98.73	$87.11 - $113.71
Q4 2021	22,906	$2,285	$105.37	$90.25 - $118.89
Q3 2021	21,725	$2,257	$98.39	$89.03 - $106.90
Q2 2021	29,741	$2,770	$90.87	$83.56 - $96.47
Q1 2021	26,358	$2,216	$84.13	$73.69 - $91.94
Q4 2020	34,620	$2,635	$67.02	$52.22 - $77.16
Q3 2020	44,639	$2,501	$59.23	$52.29 - $67.07
Q2 2020	24,261	$1,455	$55.73	$44.36 - $71.22
Q1 2020	20,923	$1,074	$73.03	$29.45 - $88.40
Q4 2019	15,742	$1,350	$81.27	$71.31 - $88.01
Q3 2019	15,639	$1,207	$73.96	$67.83 - $80.06
Q2 2019	14,872	$1,057	$69.62	$62.54 - $77.24
Q1 2019	13,971	$999	$61.79	$48.13 - $72.26
Q4 2018	21,614	$1,067	$62.29	$46.21 - $72.46
Q3 2018	24,412	$1,747	$63.60	$54.90 - $72.50
Q2 2018	37,113	$2,062	$51.36	$44.75 - $56.00
Q1 2018	34,629	$1,690	$52.41	$46.62 - $57.97
Q4 2017	20,830	$1,129	$54.14	$51.43 - $58.22
Q3 2017	21,760	$1,234	$54.44	$49.63 - $58.28
Q2 2017	13,517	$755	$57.50	$53.17 - $61.62
Q1 2017	7,614	$423	$55.34	$52.77 - $59.17
Q4 2016	7,732	$430	$50.41	$43.03 - $58.23
Q3 2016	7,739	$371	$49.57	$44.91 - $53.79
Q2 2016	10,080	$525	$50.01	$46.40 - $54.54
Q1 2016	9,370	$462	$43.78	$37.09 - $49.97
Q4 2015	15,194	$633	$43.45	$39.89 - $48.05
Q3 2015	15,350	$675	$49.63	$43.00 - $54.31
Q2 2015	15,425	$829	$55.82	$50.65 - $59.29
Q1 2015	13,991	$794	$51.78	$44.70 - $58.44
Q4 2014	11,702	$562	$48.74	$43.05 - $53.84
Q3 2014	7,658	$413	$58.81	$53.66 - $65.53
Q2 2014	7,688	$494	$59.46	$52.02 - $64.30
Q1 2014	7,715	$423	$54.49	$44.95 - $60.47
Q4 2013	7,747	$465	$57.66	$51.77 - $64.12
Q3 2013	7,828	$459	$55.80	$50.23 - $59.80
Q2 2013	7,667	$387	$55.73	$50.37 - $61.28