ECOLAB INC

Ticker: ECL CUSIP: 278865100 Class: COM

BOKF, NA's Holding History (CIK: 0000009634)

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

Q4 2025

Shares 21,171 Value ($000) $5,558 Avg Close $265.71 Range $251.04 - $281.41

Q3 2025

Shares 22,394 Value ($000) $6,133 Avg Close $270.32 Range $253.71 - $284.56

Q2 2025

Shares 21,696 Value ($000) $5,846 Avg Close $252.35 Range $219.93 - $269.19

Q1 2025

Shares 22,238 Value ($000) $5,638 Avg Close $249.61 Range $225.31 - $270.90

Q4 2024

Shares 22,945 Value ($000) $5,271 Avg Close $245.53 Range $230.70 - $259.26

Q3 2024

Shares 23,271 Value ($000) $5,836 Avg Close $241.07 Range $217.65 - $253.31

Q2 2024

Shares 22,989 Value ($000) $5,471 Avg Close $227.14 Range $213.29 - $242.24

Q1 2024

Shares 23,774 Value ($000) $5,419 Avg Close $207.94 Range $189.63 - $227.85

Q4 2023

Shares 24,739 Value ($000) $4,907 Avg Close $175.85 Range $153.18 - $197.06

Q3 2023

Shares 24,983 Value ($000) $4,191 Avg Close $177.30 Range $163.22 - $186.52

Q2 2023

Shares 23,443 Value ($000) $4,377 Avg Close $167.31 Range $156.95 - $182.94

Q1 2023

Shares 24,014 Value ($000) $3,975 Avg Close $150.99 Range $139.35 - $161.29

Q4 2022

Shares 28,888 Value ($000) $4,205 Avg Close $141.81 Range $126.42 - $153.48

Q3 2022

Shares 33,087 Value ($000) $4,779 Avg Close $156.07 Range $138.29 - $171.23

Q2 2022

Shares 26,021 Value ($000) $4,001 Avg Close $158.99 Range $137.82 - $177.76

Q1 2022

Shares 26,624 Value ($000) $4,701 Avg Close $179.54 Range $147.91 - $226.74

Q4 2021

Shares 27,240 Value ($000) $6,390 Avg Close $215.53 Range $199.33 - $227.72

Q3 2021

Shares 26,955 Value ($000) $5,623 Avg Close $208.54 Range $195.25 - $219.93

Q1 2021

Shares 25,779 Value ($000) $5,519 Avg Close $201.55 Range $190.45 - $215.84

Q4 2020

Shares 24,618 Value ($000) $5,327 Avg Close $197.47 Range $171.24 - $214.73

Q3 2020

Shares 24,189 Value ($000) $4,834 Avg Close $188.44 Range $172.53 - $201.15

Q2 2020

Shares 34,049 Value ($000) $6,774 Avg Close $182.16 Range $136.65 - $217.57

Q1 2020

Shares 31,704 Value ($000) $4,941 Avg Close $176.33 Range $117.17 - $198.13

Q4 2019

Shares 29,015 Value ($000) $5,600 Avg Close $177.67 Range $169.74 - $186.58

Q3 2019

Shares 28,615 Value ($000) $5,667 Avg Close $187.16 Range $179.22 - $195.89

Q2 2019

Shares 29,218 Value ($000) $5,768 Avg Close $173.21 Range $164.99 - $187.12

Q1 2019

Shares 31,359 Value ($000) $5,537 Avg Close $150.92 Range $131.24 - $169.66

Q4 2018

Shares 30,673 Value ($000) $4,520 Avg Close $141.48 Range $126.10 - $150.86

Q3 2018

Shares 36,047 Value ($000) $5,651 Avg Close $137.00 Range $128.06 - $148.09

Q2 2018

Shares 36,480 Value ($000) $5,120 Avg Close $132.91 Range $122.30 - $138.58

Q1 2018

Shares 34,397 Value ($000) $4,715 Avg Close $123.54 Range $115.47 - $129.02

Q4 2017

Shares 35,984 Value ($000) $4,829 Avg Close $121.85 Range $117.53 - $126.30

Q3 2017

Shares 36,698 Value ($000) $4,720 Avg Close $120.10 Range $116.11 - $122.59

Q2 2017

Shares 32,351 Value ($000) $4,295 Avg Close $117.68 Range $113.27 - $123.01

Q1 2017

Shares 33,018 Value ($000) $4,138 Avg Close $111.04 Range $106.47 - $114.69

Q4 2016

Shares 33,060 Value ($000) $3,875 Avg Close $105.98 Range $100.13 - $110.74

Q3 2016

Shares 38,779 Value ($000) $4,720 Avg Close $108.98 Range $105.46 - $112.42

Q2 2016

Shares 46,588 Value ($000) $5,525 Avg Close $104.92 Range $98.81 - $109.58

Q1 2016

Shares 48,287 Value ($000) $5,386 Avg Close $95.34 Range $88.43 - $102.02

Q4 2015

Shares 45,952 Value ($000) $5,256 Avg Close $105.21 Range $98.01 - $109.49

Q3 2015

Shares 45,491 Value ($000) $4,991 Avg Close $99.79 Range $91.88 - $104.89

Q2 2015

Shares 39,717 Value ($000) $4,491 Avg Close $102.25 Range $97.79 - $105.41

Q1 2015

Shares 40,392 Value ($000) $4,621 Avg Close $97.19 Range $86.65 - $103.73

Q4 2014

Shares 34,012 Value ($000) $3,555 Avg Close $96.70 Range $89.74 - $101.94

Q3 2014

Shares 41,460 Value ($000) $4,761 Avg Close $99.26 Range $94.57 - $104.65

Q2 2014

Shares 52,977 Value ($000) $5,899 Avg Close $94.25 Range $89.51 - $98.33

Q1 2014

Shares 55,795 Value ($000) $6,026 Avg Close $91.92 Range $85.62 - $98.30

Q4 2013

Shares 62,707 Value ($000) $6,539 Avg Close $90.95 Range $84.34 - $94.74

Q3 2013

Shares 57,224 Value ($000) $5,651 Avg Close $81.20 Range $74.57 - $86.97

Q2 2013

Shares 47,362 Value ($000) $4,035 Avg Close $73.48 Range $68.51 - $77.84

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	21,171	$5,558	$265.71	$251.04 - $281.41
Q3 2025	22,394	$6,133	$270.32	$253.71 - $284.56
Q2 2025	21,696	$5,846	$252.35	$219.93 - $269.19
Q1 2025	22,238	$5,638	$249.61	$225.31 - $270.90
Q4 2024	22,945	$5,271	$245.53	$230.70 - $259.26
Q3 2024	23,271	$5,836	$241.07	$217.65 - $253.31
Q2 2024	22,989	$5,471	$227.14	$213.29 - $242.24
Q1 2024	23,774	$5,419	$207.94	$189.63 - $227.85
Q4 2023	24,739	$4,907	$175.85	$153.18 - $197.06
Q3 2023	24,983	$4,191	$177.30	$163.22 - $186.52
Q2 2023	23,443	$4,377	$167.31	$156.95 - $182.94
Q1 2023	24,014	$3,975	$150.99	$139.35 - $161.29
Q4 2022	28,888	$4,205	$141.81	$126.42 - $153.48
Q3 2022	33,087	$4,779	$156.07	$138.29 - $171.23
Q2 2022	26,021	$4,001	$158.99	$137.82 - $177.76
Q1 2022	26,624	$4,701	$179.54	$147.91 - $226.74
Q4 2021	27,240	$6,390	$215.53	$199.33 - $227.72
Q3 2021	26,955	$5,623	$208.54	$195.25 - $219.93
Q1 2021	25,779	$5,519	$201.55	$190.45 - $215.84
Q4 2020	24,618	$5,327	$197.47	$171.24 - $214.73
Q3 2020	24,189	$4,834	$188.44	$172.53 - $201.15
Q2 2020	34,049	$6,774	$182.16	$136.65 - $217.57
Q1 2020	31,704	$4,941	$176.33	$117.17 - $198.13
Q4 2019	29,015	$5,600	$177.67	$169.74 - $186.58
Q3 2019	28,615	$5,667	$187.16	$179.22 - $195.89
Q2 2019	29,218	$5,768	$173.21	$164.99 - $187.12
Q1 2019	31,359	$5,537	$150.92	$131.24 - $169.66
Q4 2018	30,673	$4,520	$141.48	$126.10 - $150.86
Q3 2018	36,047	$5,651	$137.00	$128.06 - $148.09
Q2 2018	36,480	$5,120	$132.91	$122.30 - $138.58
Q1 2018	34,397	$4,715	$123.54	$115.47 - $129.02
Q4 2017	35,984	$4,829	$121.85	$117.53 - $126.30
Q3 2017	36,698	$4,720	$120.10	$116.11 - $122.59
Q2 2017	32,351	$4,295	$117.68	$113.27 - $123.01
Q1 2017	33,018	$4,138	$111.04	$106.47 - $114.69
Q4 2016	33,060	$3,875	$105.98	$100.13 - $110.74
Q3 2016	38,779	$4,720	$108.98	$105.46 - $112.42
Q2 2016	46,588	$5,525	$104.92	$98.81 - $109.58
Q1 2016	48,287	$5,386	$95.34	$88.43 - $102.02
Q4 2015	45,952	$5,256	$105.21	$98.01 - $109.49
Q3 2015	45,491	$4,991	$99.79	$91.88 - $104.89
Q2 2015	39,717	$4,491	$102.25	$97.79 - $105.41
Q1 2015	40,392	$4,621	$97.19	$86.65 - $103.73
Q4 2014	34,012	$3,555	$96.70	$89.74 - $101.94
Q3 2014	41,460	$4,761	$99.26	$94.57 - $104.65
Q2 2014	52,977	$5,899	$94.25	$89.51 - $98.33
Q1 2014	55,795	$6,026	$91.92	$85.62 - $98.30
Q4 2013	62,707	$6,539	$90.95	$84.34 - $94.74
Q3 2013	57,224	$5,651	$81.20	$74.57 - $86.97
Q2 2013	47,362	$4,035	$73.48	$68.51 - $77.84