Ecolab Inc.
MX ˙ BMV ˙ US2788651006
SecurityMX:ECL / Ecolab Inc.
InstitutionThompson Investment Management, Inc.
Latest Disclosed Ownership75 shares
Latest Disclosed Value $ 19,951
Thompson Investment Management, Inc. reports 20.21% decrease in ownership of ECL / Ecolab Inc.

On April 8, 2026 - Thompson Investment Management, Inc. filed a 13F-HR form disclosing ownership of 75 shares of Ecolab Inc. (MX:ECL) valued at $19,951 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 94 shares of Ecolab Inc.. This represents a change in shares of -20.21% 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)
2026-04-08 2026-03-31 13F ECOLAB INC COM COM 278865100 75 -19 -20.21 20 -20.83 0.0025
2026-01-14 2025-12-31 13F ECOLAB INC COM COM 278865100 94 0 0.00 25 -4.00 0.0029
2025-10-17 2025-09-30 13F ECOLAB INC COM COM 278865100 94 19 25.33 26 25.00 0.0034
2025-07-24 2025-06-30 13F ECOLAB INC COM COM 278865100 75 0 0.00 20 5.26 0.0029
2025-04-15 2025-03-31 13F ECOLAB INC COM COM 278865100 75 0 0.00 19 11.76 0.0029
2025-01-28 2024-12-31 13F ECOLAB INC COM COM 278865100 75 75 18 0.0025
2024-07-08 2024-06-30 13F ECOLAB INC COM COM 278865100 0 -147 -100.00 0 -100.00
2024-04-15 2024-03-31 13F ECOLAB INC COM COM 278865100 147 0 0.00 34 17.24 0.0051
2024-01-16 2023-12-31 13F ECOLAB INC COM COM 278865100 147 0 0.00 29 20.83 0.0047
2023-10-30 2023-09-30 13F ECOLAB INC COM COM 278865100 147 0 0.00 25 -11.11 0.0044
2023-07-10 2023-06-30 13F ECOLAB INC COM COM 278865100 147 0 0.00 28 12.50 0.0045
2023-04-24 2023-03-31 13F ECOLAB INC COM COM 278865100 147 147 24 0.0041
2019-08-07 2019-06-30 13F ECOLAB INC COM COM 278865100 0 -1,767 -100.00 0 -100.00
2019-04-24 2019-03-31 13F ECOLAB INC COM COM 278865100 1,767 0 0.00 312 20.00 0.0597
2019-02-04 2018-12-31 13F ECOLAB INC COM COM 278865100 1,767 -856 -32.63 260 -36.74 0.0610
2018-11-06 2018-09-30 13F ECOLAB INC COM COM 278865100 2,623 0 0.00 411 11.68 0.0733
2018-07-09 2018-06-30 13F ECOLAB INC COM COM 278865100 2,623 42 1.63 368 3.95 0.0672
2018-05-04 2018-03-31 13F ECOLAB INC COM COM 278865100 2,581 0 0.00 354 2.31 0.0660
2018-02-02 2017-12-31 13F ECOLAB INC COM COM 278865100 2,581 0 0.00 346 4.22 0.0611
2017-11-07 2017-09-30 13F ECOLAB INC COM COM 278865100 2,581 0 0.00 332 -3.21 0.0619
2017-08-07 2017-06-30 13F ECOLAB INC COM COM 278865100 2,581 0 0.00 343 5.86 0.0645
2017-05-01 2017-03-31 13F ECOLAB INC COM COM 278865100 2,581 -80 -3.01 324 3.85 0.0617
2017-02-08 2016-12-31 13F ECOLAB INC COM COM 278865100 2,661 0 0.00 312 -3.70 0.0610
2016-11-08 2016-09-30 13F ECOLAB INC COM COM 278865100 2,661 -575 -17.77 324 -15.62 0.0624
2016-08-01 2016-06-30 13F ECOLAB INC COM COM 278865100 3,236 0 0.00 384 6.37 0.0785
2016-04-21 2016-03-31 13F ECOLAB INC COM COM 278865100 3,236 0 0.00 361 -2.43 0.0754
2016-02-02 2015-12-31 13F ECOLAB INC COM COM 278865100 3,236 -1,450 -30.94 370 -28.02 0.0771
2015-10-23 2015-09-30 13F ECOLAB INC COM COM 278865100 4,686 0 0.00 514 -3.02 0.1109
2015-07-24 2015-06-30 13F ECOLAB INC COM COM 278865100 4,686 0 0.00 530 -1.12 0.1017
2015-05-04 2015-03-31 13F ECOLAB INC COM COM 278865100 4,686 300 6.84 536 17.03 0.1018
2015-02-06 2014-12-31 13F ECOLAB INC COM COM 278865100 4,386 0 0.00 458 -6.15 0.0873
2014-11-05 2014-09-30 13F ECOLAB INC COM COM 278865100 4,386 -650 -12.91 488 -13.01 0.0934
2014-08-05 2014-06-30 13F ECOLAB INC COM COM 278865100 5,036 0 0.00 561 3.13 0.1085
2014-04-10 2014-03-31 13F ECOLAB INC COM COM 278865100 5,036 -225 -4.28 544 -0.91 0.1086
2014-01-22 2013-12-31 13F ECOLAB INC COM COM 278865100 5,261 -100 -1.87 549 3.78 0.1088
2013-11-04 2013-09-30 13F ECOLAB INC COM COM 278865100 5,361 0 0.00 529 15.75 0.1142
2013-07-30 2013-06-30 13F ECOLAB INC COM COM 278865100 5,361 5,361 457 0.1056
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.