Ecolab Inc.
MX ˙ BMV ˙ US2788651006
SecurityMX:ECL / Ecolab Inc.
InstitutionMiddleton & Co Inc/ma
Latest Disclosed Ownership29,833 shares
Latest Disclosed Value $ 7,936,175
Middleton & Co Inc/ma reports 3.16% decrease in ownership of ECL / Ecolab Inc.

On May 8, 2026 - Middleton & Co Inc/ma filed a 13F-HR form disclosing ownership of 29,833 shares of Ecolab Inc. (MX:ECL) valued at $7,936,175 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 30,808 shares of Ecolab Inc.. This represents a change in shares of -3.16% during the quarter.

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)
2026-05-08 2026-03-31 13F Ecolab COM 278865100 29,833 -975 -3.16 7,936 -1.87 0.9051
2026-01-29 2025-12-31 13F Ecolab COM 278865100 30,808 -217 -0.70 8,088 -4.81 0.8587
2025-10-29 2025-09-30 13F Ecolab COM 278865100 31,025 -1,521 -4.67 8,497 -3.11 0.9183
2025-08-06 2025-06-30 13F Ecolab COM 278865100 32,546 -1,426 -4.20 8,769 1.82 0.9850
2025-05-09 2025-03-31 13F Ecolab COM 278865100 33,972 -753 -2.17 8,613 5.85 1.0062
2025-02-05 2024-12-31 13F Ecolab COM 278865100 34,725 -543 -1.54 8,137 -9.64 0.8990
2024-10-23 2024-09-30 13F ECOLAB COM 278865100 35,268 -334 -0.94 9,005 6.27 0.9950
2024-08-12 2024-06-30 13F ECOLAB COM 278865100 35,602 -1,840 -4.91 8,473 -1.99 0.9845
2024-05-14 2024-03-31 13F ECOLAB COM 278865100 37,442 -123 -0.33 8,645 16.02 0.9970
2024-02-13 2023-12-31 13F ECOLAB COM 278865100 37,565 -315 -0.83 7,451 16.13 0.9293
2023-10-26 2023-09-30 13F ECOLAB COM 278865100 37,880 1,387 3.80 6,417 -5.81 0.8867
2023-07-28 2023-06-30 13F ECOLAB COM 278865100 36,493 1,432 4.08 6,813 17.39 0.9034
2023-04-28 2023-03-31 13F ECOLAB COM 278865100 35,061 90 0.26 5,804 14.01 0.8339
2023-02-09 2022-12-31 13F ECOLAB COM 278865100 34,971 -1,980 -5.36 5,090 -4.61 0.7543
2022-11-02 2022-09-30 13F ECOLAB COM 278865100 36,951 -4,837 -11.58 5,336 -16.95 0.8119
2022-07-21 2022-06-30 13F ECOLAB COM 278865100 41,788 -1,224 -2.85 6,425 -15.40 0.8232
2022-05-12 2022-03-31 13F ECOLAB COM 278865100 43,012 -531 -1.22 7,595 -25.64 0.8106
2022-02-09 2021-12-31 13F ECOLAB COM 278865100 43,543 -125 -0.29 10,214 12.12 0.9951
2021-11-08 2021-09-30 13F ECOLAB COM 278865100 43,668 656 1.53 9,110 2.83 0.9751
2021-08-13 2021-06-30 13F ECOLAB COM 278865100 43,012 -2,413 -5.31 8,859 -8.90 0.9602
2021-05-06 2021-03-31 13F/A-1 ECOLAB COM 278865100 45,425 364 0.81 9,724 -0.26 1.0958
2021-05-06 2021-03-31 13F ECOLAB COM 278865100 46,099 10,332 1.0810
2021-01-29 2020-12-31 13F ECOLAB COM 278865100 45,061 1,991 4.62 9,749 13.27 1.1530
2020-10-30 2020-09-30 13F ECOLAB COM 278865100 43,070 2,615 6.46 8,607 6.93 1.1401
2020-07-28 2020-06-30 13F ECOLAB COM 278865100 40,455 910 2.30 8,049 30.62 1.1594
2020-04-22 2020-03-31 13F ECOLAB COM 278865100 39,545 305 0.78 6,162 -18.63 1.0779
2020-01-29 2019-12-31 13F ECOLAB COM 278865100 39,240 344 0.88 7,573 -1.69 1.0776
2019-10-21 2019-09-30 13F ECOLAB COM 278865100 38,896 -2,105 -5.13 7,703 -4.84 1.1874
2019-07-25 2019-06-30 13F ECOLAB COM 278865100 41,001 -3,058 -6.94 8,095 4.08 1.2548
2019-04-25 2019-03-31 13F ECOLAB COM 278865100 44,059 581 1.34 7,778 21.42 1.2474
2019-02-01 2018-12-31 13F ECOLAB COM 278865100 43,478 4,678 12.06 6,406 5.31 1.1782
2018-10-25 2018-09-30 13F ECOLAB COM 278865100 38,800 516 1.35 6,083 13.24 0.9490
2018-07-26 2018-06-30 13F ECOLAB COM 278865100 38,284 2,664 7.48 5,372 10.04 0.9194
2018-05-04 2018-03-31 13F ECOLAB COM 278865100 35,620 -2,033 -5.40 4,882 -3.37 0.8740
2018-01-25 2017-12-31 13F ECOLAB COM 278865100 37,653 3,850 11.39 5,052 16.22 0.8478
2017-10-31 2017-09-30 13F ECOLAB COM 278865100 33,803 2,609 8.36 4,347 4.97 0.7853
2017-07-18 2017-06-30 13F ECOLAB COM 278865100 31,194 7,152 29.75 4,141 37.44 0.8820
2017-04-19 2017-03-31 13F ECOLAB COM 278865100 24,042 4,114 20.64 3,013 28.98 0.6607
2017-02-02 2016-12-31 13F ECOLAB COM 278865100 19,928 8,150 69.20 2,336 62.90 0.5273
2016-10-27 2016-09-30 13F ECOLAB COM 278865100 11,778 9,150 348.17 1,434 359.62 0.3213
2016-07-21 2016-06-30 13F ECOLAB COM 278865100 2,628 2,628 312 0.0717
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.