ECOLAB INC

Ticker: ECL CUSIP: 278865100 Class: COM

DUDLEY & SHANLEY, INC.'s Holding History (CIK: 0000883511)

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

Q4 2025

Shares 105,058 Value ($000) $27,580 Avg Close $265.71 Range $251.04 - $281.41

Q3 2025

Shares 104,983 Value ($000) $28,751 Avg Close $270.32 Range $253.71 - $284.56

Q2 2025

Shares 104,983 Value ($000) $28,287 Avg Close $252.35 Range $219.93 - $269.19

Q1 2025

Shares 104,863 Value ($000) $26,585 Avg Close $249.61 Range $225.31 - $270.90

Q4 2024

Shares 104,853 Value ($000) $24,569 Avg Close $245.53 Range $230.70 - $259.26

Q3 2024

Shares 104,953 Value ($000) $26,798 Avg Close $241.07 Range $217.65 - $253.31

Q2 2024

Shares 105,278 Value ($000) $25,056 Avg Close $227.14 Range $213.29 - $242.24

Q1 2024

Shares 107,827 Value ($000) $24,897 Avg Close $207.94 Range $189.63 - $227.85

Q4 2023

Shares 106,187 Value ($000) $21,062 Avg Close $175.85 Range $153.18 - $197.06

Q3 2023

Shares 107,897 Value ($000) $18,278 Avg Close $177.30 Range $163.22 - $186.52

Q2 2023

Shares 106,272 Value ($000) $19,840 Avg Close $167.31 Range $156.95 - $182.94

Q1 2023

Shares 106,272 Value ($000) $17,591 Avg Close $150.99 Range $139.35 - $161.29

Q4 2022

Shares 106,672 Value ($000) $15,527 Avg Close $141.81 Range $126.42 - $153.48

Q3 2022

Shares 95,972 Value ($000) $13,860 Avg Close $156.07 Range $138.29 - $171.23

Q2 2022

Shares 95,972 Value ($000) $14,757 Avg Close $158.99 Range $137.82 - $177.76

Q1 2022

Shares 116,532 Value ($000) $20,575 Avg Close $179.54 Range $147.91 - $226.74

Q4 2021

Shares 116,532 Value ($000) $27,337 Avg Close $215.53 Range $199.33 - $227.72

Q3 2021

Shares 119,107 Value ($000) $24,848 Avg Close $208.54 Range $195.25 - $219.93

Q2 2021

Shares 118,887 Value ($000) $24,487 Avg Close $206.33 Range $194.28 - $218.25

Q1 2021

Shares 122,672 Value ($000) $26,260 Avg Close $201.55 Range $190.45 - $215.84

Q4 2020

Shares 122,842 Value ($000) $26,578 Avg Close $197.47 Range $171.24 - $214.73

Q3 2020

Shares 120,992 Value ($000) $24,179 Avg Close $188.44 Range $172.53 - $201.15

Q2 2020

Shares 118,943 Value ($000) $23,664 Avg Close $182.16 Range $136.65 - $217.57

Q1 2020

Shares 119,643 Value ($000) $18,644 Avg Close $176.33 Range $117.17 - $198.13

Q4 2019

Shares 115,223 Value ($000) $22,237 Avg Close $177.67 Range $169.74 - $186.58

Q3 2019

Shares 110,223 Value ($000) $21,829 Avg Close $187.16 Range $179.22 - $195.89

Q2 2019

Shares 149,995 Value ($000) $29,615 Avg Close $173.21 Range $164.99 - $187.12

Q1 2019

Shares 153,461 Value ($000) $27,092 Avg Close $150.92 Range $131.24 - $169.66

Q4 2018

Shares 155,655 Value ($000) $22,936 Avg Close $141.48 Range $126.10 - $150.86

Q3 2018

Shares 155,510 Value ($000) $24,381 Avg Close $137.00 Range $128.06 - $148.09

Q2 2018

Shares 155,510 Value ($000) $21,823 Avg Close $132.91 Range $122.30 - $138.58

Q1 2018

Shares 156,310 Value ($000) $21,425 Avg Close $123.54 Range $115.47 - $129.02

Q4 2017

Shares 157,010 Value ($000) $21,068 Avg Close $121.85 Range $117.53 - $126.30

Q3 2017

Shares 159,310 Value ($000) $20,489 Avg Close $120.10 Range $116.11 - $122.59

Q2 2017

Shares 188,990 Value ($000) $25,088 Avg Close $117.68 Range $113.27 - $123.01

Q1 2017

Shares 189,990 Value ($000) $23,813 Avg Close $111.04 Range $106.47 - $114.69

Q4 2016

Shares 190,240 Value ($000) $22,300 Avg Close $105.98 Range $100.13 - $110.74

Q3 2016

Shares 190,240 Value ($000) $23,156 Avg Close $108.98 Range $105.46 - $112.42

Q2 2016

Shares 193,240 Value ($000) $22,918 Avg Close $104.92 Range $98.81 - $109.58

Q1 2016

Shares 193,240 Value ($000) $21,550 Avg Close $95.34 Range $88.43 - $102.02

Q4 2015

Shares 195,440 Value ($000) $22,354 Avg Close $105.21 Range $98.01 - $109.49

Q3 2015

Shares 196,540 Value ($000) $21,564 Avg Close $99.79 Range $91.88 - $104.89

Q2 2015

Shares 196,540 Value ($000) $22,223 Avg Close $102.25 Range $97.79 - $105.41

Q1 2015

Shares 196,540 Value ($000) $22,480 Avg Close $97.19 Range $86.65 - $103.73

Q4 2014

Shares 168,700 Value ($000) $17,633 Avg Close $96.70 Range $89.74 - $101.94

Q3 2014

Shares 171,200 Value ($000) $19,659 Avg Close $99.26 Range $94.57 - $104.65

Q2 2014

Shares 173,800 Value ($000) $19,351 Avg Close $94.25 Range $89.51 - $98.33

Q1 2014

Shares 174,300 Value ($000) $18,823 Avg Close $91.92 Range $85.62 - $98.30

Q4 2013

Shares 174,900 Value ($000) $18,237 Avg Close $90.95 Range $84.34 - $94.74

Q3 2013

Shares 175,300 Value ($000) $17,313 Avg Close $81.20 Range $74.57 - $86.97

Q2 2013

Shares 174,700 Value ($000) $14,883 Avg Close $73.48 Range $68.51 - $77.84

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	105,058	$27,580	$265.71	$251.04 - $281.41
Q3 2025	104,983	$28,751	$270.32	$253.71 - $284.56
Q2 2025	104,983	$28,287	$252.35	$219.93 - $269.19
Q1 2025	104,863	$26,585	$249.61	$225.31 - $270.90
Q4 2024	104,853	$24,569	$245.53	$230.70 - $259.26
Q3 2024	104,953	$26,798	$241.07	$217.65 - $253.31
Q2 2024	105,278	$25,056	$227.14	$213.29 - $242.24
Q1 2024	107,827	$24,897	$207.94	$189.63 - $227.85
Q4 2023	106,187	$21,062	$175.85	$153.18 - $197.06
Q3 2023	107,897	$18,278	$177.30	$163.22 - $186.52
Q2 2023	106,272	$19,840	$167.31	$156.95 - $182.94
Q1 2023	106,272	$17,591	$150.99	$139.35 - $161.29
Q4 2022	106,672	$15,527	$141.81	$126.42 - $153.48
Q3 2022	95,972	$13,860	$156.07	$138.29 - $171.23
Q2 2022	95,972	$14,757	$158.99	$137.82 - $177.76
Q1 2022	116,532	$20,575	$179.54	$147.91 - $226.74
Q4 2021	116,532	$27,337	$215.53	$199.33 - $227.72
Q3 2021	119,107	$24,848	$208.54	$195.25 - $219.93
Q2 2021	118,887	$24,487	$206.33	$194.28 - $218.25
Q1 2021	122,672	$26,260	$201.55	$190.45 - $215.84
Q4 2020	122,842	$26,578	$197.47	$171.24 - $214.73
Q3 2020	120,992	$24,179	$188.44	$172.53 - $201.15
Q2 2020	118,943	$23,664	$182.16	$136.65 - $217.57
Q1 2020	119,643	$18,644	$176.33	$117.17 - $198.13
Q4 2019	115,223	$22,237	$177.67	$169.74 - $186.58
Q3 2019	110,223	$21,829	$187.16	$179.22 - $195.89
Q2 2019	149,995	$29,615	$173.21	$164.99 - $187.12
Q1 2019	153,461	$27,092	$150.92	$131.24 - $169.66
Q4 2018	155,655	$22,936	$141.48	$126.10 - $150.86
Q3 2018	155,510	$24,381	$137.00	$128.06 - $148.09
Q2 2018	155,510	$21,823	$132.91	$122.30 - $138.58
Q1 2018	156,310	$21,425	$123.54	$115.47 - $129.02
Q4 2017	157,010	$21,068	$121.85	$117.53 - $126.30
Q3 2017	159,310	$20,489	$120.10	$116.11 - $122.59
Q2 2017	188,990	$25,088	$117.68	$113.27 - $123.01
Q1 2017	189,990	$23,813	$111.04	$106.47 - $114.69
Q4 2016	190,240	$22,300	$105.98	$100.13 - $110.74
Q3 2016	190,240	$23,156	$108.98	$105.46 - $112.42
Q2 2016	193,240	$22,918	$104.92	$98.81 - $109.58
Q1 2016	193,240	$21,550	$95.34	$88.43 - $102.02
Q4 2015	195,440	$22,354	$105.21	$98.01 - $109.49
Q3 2015	196,540	$21,564	$99.79	$91.88 - $104.89
Q2 2015	196,540	$22,223	$102.25	$97.79 - $105.41
Q1 2015	196,540	$22,480	$97.19	$86.65 - $103.73
Q4 2014	168,700	$17,633	$96.70	$89.74 - $101.94
Q3 2014	171,200	$19,659	$99.26	$94.57 - $104.65
Q2 2014	173,800	$19,351	$94.25	$89.51 - $98.33
Q1 2014	174,300	$18,823	$91.92	$85.62 - $98.30
Q4 2013	174,900	$18,237	$90.95	$84.34 - $94.74
Q3 2013	175,300	$17,313	$81.20	$74.57 - $86.97
Q2 2013	174,700	$14,883	$73.48	$68.51 - $77.84