Ecolab Inc.
US ˙ NYSE ˙ US2788651006

SecurityECL / Ecolab Inc.
InstitutionWest Oak Capital, LLC
Latest Disclosed Ownership1,827 shares
Latest Disclosed Value $ 5,003
West Oak Capital, LLC reports 1.35% decrease in ownership of ECL / Ecolab Inc.

On October 3, 2025 - West Oak Capital, LLC filed a 13F-HR form disclosing ownership of 1,827 shares of Ecolab Inc. (US:ECL) valued at $500,342 USD as of September 30, 2025. The entity filed a previous 13F-HR on July 15, 2025 disclosing 1,852 shares of Ecolab Inc.. This represents a change in shares of -1.35% during the quarter. The current value of the position is $471,311 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)
2025-10-03 2025-09-30 13F Ecolab COM 278865100 1,827 -25 -1.35 5 25.00 0.1984
2025-07-15 2025-06-30 13F Ecolab COM 278865100 1,852 0 0.00 5 0.00 0.1954
2025-04-16 2025-03-31 13F Ecolab COM 278865100 1,852 -200 -9.75 5 0.00 0.1815
2025-01-14 2024-12-31 13F/A-1 Ecolab COM 278865100 2,052 0 0.00 5 -20.00 0.1701
2025-01-10 2024-12-31 13F Ecolab COM 278865100 2,052 0 5 0.1699
2024-10-18 2024-09-30 13F Ecolab COM 278865100 2,052 0 0.00 5 -98.98 0.0974
2024-07-24 2024-06-30 13F Ecolab COM 278865100 2,052 0 0.00 488 0.1965
2024-04-18 2024-03-31 13F Ecolab COM 278865100 2,052 0 0.00 0 0.2016
2024-01-18 2023-12-31 13F Ecolab COM 278865100 2,052 0 0.00 0 0.1908
2023-10-05 2023-09-30 13F Ecolab COM 278865100 2,052 0 0.00 0 -100.00 0.1728
2023-07-19 2023-06-30 13F Ecolab COM 278865100 2,052 75 3.79 383 17.13 0.1861
2023-04-21 2023-03-31 13F Ecolab COM 278865100 1,977 32 1.65 327 0.1658
2023-01-05 2022-12-31 13F Ecolab COM 278865100 1,945 -32 -1.62 0 -100.00 0.1478
2022-11-14 2022-09-30 13F/A-1 Ecolab COM 278865100 1,977 -68 -3.33 286 -8.92 0.1551
2022-10-28 2022-09-30 13F Ecolab COM 278865100 1,977 -68 286 0.1549
2022-07-11 2022-06-30 13F Ecolab COM 278865100 2,045 0 0.00 314 -13.02 0.1648
2022-04-20 2022-03-31 13F Ecolab COM 278865100 2,045 -40 -1.92 361 -26.18 0.1629
2022-01-12 2021-12-31 13F Ecolab COM 278865100 2,085 -75 -3.47 489 8.43 0.1798
2021-10-07 2021-09-30 13F Ecolab COM 278865100 2,160 -15 -0.69 451 0.67 0.1749
2021-07-20 2021-06-30 13F Ecolab COM 278865100 2,175 0 0.00 448 -3.86 0.1765
2021-04-13 2021-03-31 13F Ecolab COM 278865100 2,175 55 2.59 466 1.53 0.1991
2021-01-08 2020-12-31 13F Ecolab COM 278865100 2,120 0 0.00 459 8.25 0.2132
2020-10-09 2020-09-30 13F Ecolab COM 278865100 2,120 0 0.00 424 0.47 0.2331
2020-07-06 2020-06-30 13F Ecolab COM 278865100 2,120 0 0.00 422 27.88 0.2402
2020-04-07 2020-03-31 13F Ecolab COM 278865100 2,120 0 0.00 330 -19.32 0.2258
2020-01-09 2019-12-31 13F Ecolab COM 278865100 2,120 0 0.00 409 -2.62 0.2301
2019-10-02 2019-09-30 13F Ecolab COM 278865100 2,120 65 3.16 420 3.45 0.2471
2019-07-12 2019-06-30 13F Ecolab COM 278865100 2,055 0 0.00 406 11.85 0.2427
2019-04-03 2019-03-31 13F Ecolab COM 278865100 2,055 0 0.00 363 20.20 0.2270
2019-01-08 2018-12-31 13F Ecolab COM 278865100 2,055 0 0.00 303 -6.21 0.2149
2018-10-04 2018-09-30 13F Ecolab COM 278865100 2,055 0 0.00 322 11.81 0.1862
2018-07-05 2018-06-30 13F Ecolab COM 278865100 2,055 0 0.00 288 2.49 0.1756
2018-04-05 2018-03-31 13F Ecolab COM 278865100 2,055 -310 -13.11 282 -11.36 0.1671
2018-01-05 2017-12-31 13F Ecolab COM 278865100 2,365 -30 -1.25 317 2.92 0.1948
2017-10-10 2017-09-30 13F Ecolab COM 278865100 2,395 -162 -6.34 308 -9.14 0.1828
2017-07-06 2017-06-30 13F Ecolab COM 278865100 2,557 -108 -4.05 339 1.50 0.2059
2017-04-06 2017-03-31 13F Ecolab COM 278865100 2,665 -135 -4.82 334 1.83 0.2057
2017-01-04 2016-12-31 13F Ecolab COM 278865100 2,800 -295 -9.53 328 -12.77 0.2199
2016-10-04 2016-09-30 13F Ecolab COM 278865100 3,095 0 0.00 377 2.45 0.2595
2016-07-07 2016-06-30 13F Ecolab COM 278865100 3,095 30 0.98 367 7.62 0.2650
2016-04-05 2016-03-31 13F Ecolab COM 278865100 3,065 0 0.00 342 -2.57 0.2631
2016-01-07 2015-12-31 13F Ecolab COM 278865100 3,065 -25 -0.81 351 3.24 0.2722
2015-10-02 2015-09-30 13F Ecolab COM 278865100 3,090 -50 -1.59 339 -4.51 0.2737
2015-07-02 2015-06-30 13F Ecolab COM 278865100 3,140 -15 -0.48 355 -1.39 0.2643
2015-04-02 2015-03-31 13F Ecolab COM 278865100 3,155 0 0.00 361 9.42 0.2646
2015-01-08 2014-12-31 13F Ecolab COM 278865100 3,155 60 1.94 330 -7.32 0.2398
2014-10-03 2014-09-30 13F Ecolab COM 278865100 3,095 0 0.00 355 3.20 0.2662
2014-07-03 2014-06-30 13F Ecolab COM 278865100 3,095 3,095 345 0.2498
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.