Ecolab Inc.
MX ˙ BMV ˙ US2788651006
SecurityMX:ECL / Ecolab Inc.
InstitutionCorundum Group, Inc.
Latest Disclosed Ownership5,655 shares
Latest Disclosed Value $ 1,504,343
Corundum Group, Inc. reports 11.21% increase in ownership of ECL / Ecolab Inc.

On April 20, 2026 - Corundum Group, Inc. filed a 13F-HR form disclosing ownership of 5,655 shares of Ecolab Inc. (MX:ECL) valued at $1,504,343 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 12, 2026 disclosing 5,085 shares of Ecolab Inc.. This represents a change in shares of 11.21% 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)
2026-04-20 2026-03-31 13F ECOLAB CS 278865100 5,655 570 11.21 1,504 12.74 0.5028
2026-01-12 2025-12-31 13F ECOLAB CS 278865100 5,085 -20 -0.39 1,335 -4.58 0.4480
2025-10-24 2025-09-30 13F ECOLAB CS 278865100 5,105 -24 -0.47 1,398 1.23 0.5744
2025-07-21 2025-06-30 13F ECOLAB CS 278865100 5,129 62 1.22 1,382 7.55 0.6110
2025-04-23 2025-03-31 13F ECOLAB CS 278865100 5,067 -2,481 -32.87 1,285 -27.38 0.6161
2025-01-16 2024-12-31 13F ECOLAB CS 278865100 7,548 2,444 47.88 1,769 35.69 0.6604
2024-10-21 2024-09-30 13F ECOLAB CS 278865100 5,104 -2,573 -33.52 1,303 -28.68 0.5946
2024-07-17 2024-06-30 13F ECOLAB CS 278865100 7,677 2,460 47.15 1,827 51.74 0.7138
2024-04-15 2024-03-31 13F ECOLAB CS 278865100 5,217 16 0.31 1,205 16.78 0.5810
2024-01-24 2023-12-31 13F ECOLAB CS 278865100 5,201 343 7.06 1,032 25.43 0.5172
2023-10-17 2023-09-30 13F ECOLAB CS 278865100 4,858 -541 -10.02 823 -18.37 0.4676
2023-07-21 2023-06-30 13F ECOLAB CS 278865100 5,399 -2,564 -32.20 1,008 -23.60 0.5027
2023-04-24 2023-03-31 13F ECOLAB CS 278865100 7,963 2,499 45.74 1,318 0.6235
2023-01-12 2022-12-31 13F ECOLAB CS 278865100 5,464 556 11.33 1 -100.00 0.4489
2022-10-18 2022-09-30 13F ECOLAB CS 278865100 4,908 307 6.67 709 0.28 0.4460
2022-07-25 2022-06-30 13F ECOLAB CS 278865100 4,601 590 14.71 707 -0.14 0.4776
2022-05-02 2022-03-31 13F ECOLAB CS 278865100 4,011 1,813 82.48 708 37.21 0.6580
2022-02-07 2021-12-31 13F ECOLAB CS 278865100 2,198 676 44.42 516 62.26 0.3359
2021-11-02 2021-09-30 13F ECOLAB CS 278865100 1,522 -84 -5.23 318 -3.93 0.2358
2021-08-02 2021-06-30 13F ECOLAB CS 278865100 1,606 38 2.42 331 -1.49 0.2171
2021-05-10 2021-03-31 13F ECOLAB CS 278865100 1,568 31 2.02 336 0.90 0.2626
2021-02-03 2020-12-31 13F ECOLAB CS 278865100 1,537 36 2.40 333 11.00 0.2775
2020-11-12 2020-09-30 13F/A-1 ECOLAB CS 278865100 1,501 292 24.15 300 24.48 0.2906
2020-08-07 2020-06-30 13F/A-1 ECOLAB CS 278865100 1,209 -156 -11.43 241 13.15 0.2890
2020-05-07 2020-03-31 13F/A-1 ECOLAB CS 278865100 1,365 -108 -7.33 213 -25.00 0.3029
2020-01-28 2019-12-31 13F ECOLAB CS 278865100 1,473 56 3.95 284 1.07 0.2982
2019-11-01 2019-09-30 13F/A-1 ECOLAB CS 278865100 1,417 -2 -0.14 281 0.36 0.3255
2019-08-02 2019-06-30 13F ECOLAB CS 278865100 1,419 10 0.71 280 12.45 0.3217
2019-05-08 2019-03-31 13F ECOLAB CS 278865100 1,409 -2,653 -65.31 249 -58.43 0.2849
2019-02-19 2018-12-31 13F ECOLAB CS 278865100 4,062 4,062 599 0.5499
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.