Chesley Taft & Associates LLC

Position in ECL — Ecolab Inc.

CIK 1164632 CHICAGO, IL

Position in ECL

as of Jun 30, 2026 · filed Jul 8, 2026 Compact

Position Value

$11,259,465

+$620,528 QoQ

Shares Held

40,413

+1.1% QoQ

Ownership

0.014%

of shares outstanding

% of Portfolio

0.60%

of 13F equity value

Holder Rank

#342

of 1,701 holders

Holding Since

Mar 2020

26 quarters on record

Voting authority Sole 91% Shared 0% None 9%

Basic Materials · as of Jun 30, 2026

Chesley Taft & Associates LLC holds $28,380,470 across 5 Specialty Chemicals names. ECL ranks #1 (39.7% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ECL	Ecolab Inc. This page	40,413	$11,259,465
2	APD	Air Products & Chemicals, Inc.	20,900	$6,127,461
3	LIN	Linde PLC	11,675	$6,058,623
4	SHW	Sherwin Williams Co	12,535	$4,316,051
5	SOLS	Solstice Advanced Materials Inc.	6,985	$618,870

26 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$11,259,465	40,413	+1.1%	Shares	Sole	2026-07-08
2026-03-31	$10,638,937	39,993	+0.1%	Shares	Sole	2026-04-13
2025-12-31	$10,487,936	39,951	+3.3%	Shares	Other	2026-01-14
2025-09-30	$10,593,726	38,683	-0.1%	Shares	Sole	2025-10-08
2025-06-30	$10,438,375	38,741	-1.8%	Shares	Sole	2025-07-09
2025-03-31	$10,005,673	39,467	-3.5%	Shares	Sole	2025-04-10
2024-12-31	$9,586,499	40,912	-1.5%	Shares	Sole	2025-01-17
2024-09-30	$10,608,195	41,547	+0.8%	Shares	Sole	2024-10-07
2024-06-30	$9,813,454	41,233	+0.2%	Shares	Sole	2024-07-19
2024-03-31	$9,503,844	41,160	-0.3%	Shares	Sole	2024-04-16
2023-12-31	$8,190,863	41,295	-0.4%	Shares	Sole	2024-01-11
2023-09-30	$7,022,477	41,455	-0.6%	Shares	Sole	2023-10-11
2023-06-30	$7,789,640	41,725	-1.9%	Shares	Sole	2023-07-18
2023-03-31	$7,039,990	42,530	-0.2%	Shares	Sole	2023-04-11
2022-12-31	$6,203,767	42,620	-0.1%	Shares	Sole	2023-01-20
2022-09-30	$6,162,256	42,669	-0.2%	Shares	Sole	2022-10-13
2022-06-30	$6,574,623	42,759	-0.4%	Shares	Sole	2022-07-07
2022-03-31	$7,582,192	42,944	-1.9%	Shares	Sole	2022-04-14
2021-12-31	$10,270,115	43,779	-0.3%	Shares	Sole	2022-01-05
2021-09-30	$9,156,123	43,889	-0.3%	Shares	Sole	2021-10-05
2021-06-30	$9,069,682	44,034	-0.7%	Shares	Sole	2021-07-07
2021-03-31	$9,493,790	44,349	+0.5%	Shares	Sole	2021-04-06
2020-12-31	$9,548,832	44,134	-1.2%	Shares	Sole	2021-01-11
2020-09-30	$8,922,656	44,649	-48.2%	Shares	Sole	2020-10-08
2020-06-30	$17,161,228	86,259	-2.2%	Shares	Sole	2020-07-08
2020-03-31	$13,740,933	88,179	—	Shares	Sole	2020-04-15
No filing history on record for this holder in this stock.