Ecolab Inc.
US ˙ NYSE ˙ US2788651006

SecurityECL / Ecolab Inc.
InstitutionWASHINGTON TRUST Co
Latest Disclosed Ownership1,775 shares
Latest Disclosed Value $ 472,186
WASHINGTON TRUST Co ownership in ECL / Ecolab Inc.

On April 6, 2026 - WASHINGTON TRUST Co filed a 13F-HR form disclosing ownership of 1,775 shares of Ecolab Inc. (US:ECL) valued at $472,185 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 1,775 shares of Ecolab Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $453,814 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-06 2026-03-31 13F ECOLAB Equities 278865100 1,775 0 0.00 472 1.51 0.0154
2026-02-10 2025-12-31 13F ECOLAB Equities 278865100 1,775 0 0.00 466 -4.32 0.0148
2025-11-12 2025-09-30 13F ECOLAB Equities 278865100 1,775 0 0.00 486 1.67 0.0159
2025-08-08 2025-06-30 13F ECOLAB Equities 278865100 1,775 625 54.35 478 64.26 0.0169
2025-04-25 2025-03-31 13F ECOLAB COM 278865100 1,150 -300 -20.69 292 -14.16 0.0112
2025-01-30 2024-12-31 13F ECOLAB COM 278865100 1,450 -300 -17.14 340 -23.99 0.0122
2024-10-25 2024-09-30 13F ECOLAB COM 278865100 1,750 0 0.00 447 7.21 0.0157
2024-07-15 2024-06-30 13F ECOLAB COM 278865100 1,750 -50 -2.78 416 0.24 0.0152
2024-04-23 2024-03-31 13F ECOLAB COM 278865100 1,800 0 0.00 416 16.25 0.0153
2024-01-18 2023-12-31 13F ECOLAB COM 278865100 1,800 0 0.00 357 17.43 0.0141
2023-10-18 2023-09-30 13F ECOLAB COM 278865100 1,800 0 0.00 305 -9.52 0.0134
2023-07-27 2023-06-30 13F ECOLAB COM 278865100 1,800 50 2.86 336 16.26 0.0142
2023-05-10 2023-03-31 13F/A-1 ECOLAB COM 278865100 1,750 0 0.00 290 13.78 0.0130
2023-05-04 2023-03-31 13F ECOLAB COM 278865100 1 -1,749 0 0.0122
2023-07-27 2022-12-31 13F/A-1 ECOLAB COM 278865100 1,750 -500 -22.22 255 -21.85 0.0119
2023-02-08 2022-12-31 13F ECOLAB COM 278865100 1,750 -500 0 0.0000
2022-10-14 2022-09-30 13F ECOLAB COM 278865100 2,250 295 15.09 325 8.33 0.0164
2022-07-25 2022-06-30 13F ECOLAB COM 278865100 1,955 0 0.00 300 -13.04 0.0141
2022-05-05 2022-03-31 13F ECOLAB COM 278865100 1,955 -9 -0.46 345 -25.16 0.0137
2022-02-09 2021-12-31 13F/A-1 ECOLAB COM 278865100 1,964 -30,760 -94.00 461 -93.25 0.0173
2022-02-09 2021-12-31 13F ECOLAB COM 278865100 1,964 -30,760 461 0.0161
2021-11-09 2021-09-30 13F ECOLAB COM 278865100 32,724 677 2.11 6,827 3.42 0.1925
2021-08-05 2021-06-30 13F ECOLAB COM 278865100 32,047 4,153 14.89 6,601 10.55 0.1862
2021-04-28 2021-03-31 13F ECOLAB COM 278865100 27,894 684 2.51 5,971 1.43 0.1833
2021-02-09 2020-12-31 13F ECOLAB COM 278865100 27,210 10,138 59.38 5,887 72.54 0.1900
2020-11-05 2020-09-30 13F ECOLAB COM 278865100 17,072 30 0.18 3,412 0.83 0.1260
2020-08-04 2020-06-30 13F ECOLAB COM 278865100 17,042 15,017 741.58 3,384 974.29 0.1405
2020-05-07 2020-03-31 13F ECOLAB COM 278865100 2,025 2,025 315 0.0150
2020-02-12 2019-12-31 13F ECOLAB COM 278865100 0 -1,755 -100.00 0 -100.00
2019-11-06 2019-09-30 13F ECOLAB COM 278865100 1,755 -250 -12.47 337 -14.90 0.0180
2019-08-07 2019-06-30 13F ECOLAB COM 278865100 2,005 873 77.12 396 93.17 0.0217
2019-05-13 2019-03-31 13F ECOLAB COM 278865100 1,132 1,132 205 0.0115
2018-11-13 2018-09-30 13F Ecolab COM 278865100 0 -1,995 -100.00 0 -100.00
2018-08-10 2018-06-30 13F Ecolab COM 278865100 1,995 60 3.10 280 5.66 0.0150
2018-05-10 2018-03-31 13F ECOLAB COMMON STOCK 278865100 1,935 0 0.00 265 1.92 0.0155
2018-02-05 2017-12-31 13F ECOLAB COMMON STOCK 278865100 1,935 -25 -1.28 260 3.17 0.0146
2017-10-31 2017-09-30 13F ECOLAB COMMON STOCK 278865100 1,960 -358 -15.44 252 -18.18 0.0150
2017-08-03 2017-06-30 13F ECOLAB COMMON STOCK 278865100 2,318 60 2.66 308 8.83 0.0188
2017-05-01 2017-03-31 13F ECOLAB COMMON STOCK 278865100 2,258 -311 -12.11 283 -5.98 0.0179
2017-02-08 2016-12-31 13F ECOLAB COMMON STOCK 278865100 2,569 230 9.83 301 5.61 0.0195
2016-11-03 2016-09-30 13F ECOLAB COMMON STOCK 278865100 2,339 -50 -2.09 285 0.71 0.0187
2016-08-11 2016-06-30 13F ECOLAB COMMON STOCK 278865100 2,389 2,389 0.00 283 0.0191
2016-05-05 2016-03-31 13F ECOLAB COMMON STOCK 278865100 0 -1,954 -100.00 0 -100.00
2016-02-12 2015-12-31 13F ECOLAB COMMON STOCK 278865100 1,954 15 0.77 223 4.69 0.0152
2015-11-12 2015-09-30 13F ECOLAB COMMON STOCK 278865100 1,939 -69 -3.44 213 -6.17 0.0154
2015-08-07 2015-06-30 13F ECOLAB COMMON STOCK 278865100 2,008 0 0.00 227 -1.30 0.0150
2015-05-05 2015-03-31 13F ECOLAB COMMON STOCK 278865100 2,008 2,008 230 0.0153
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.