Ecolab Inc.
MX ˙ BMV ˙ US2788651006
SecurityMX:ECL / Ecolab Inc.
InstitutionChesapeake Wealth Management
Latest Disclosed Ownership1,531 shares
Latest Disclosed Value $ 407,276
Chesapeake Wealth Management reports 6.76% increase in ownership of ECL / Ecolab Inc.

On May 18, 2026 - Chesapeake Wealth Management filed a 13F-HR form disclosing ownership of 1,531 shares of Ecolab Inc. (MX:ECL) valued at $407,276 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 1,434 shares of Ecolab Inc.. This represents a change in shares of 6.76% 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)
2026-05-18 2026-03-31 13F ECOLAB COM 278865100 1,531 97 6.76 407 8.24 0.0700
2026-02-03 2025-12-31 13F ECOLAB COM 278865100 1,434 1,434 376 0.1121
2022-04-19 2022-03-31 13F ECOLAB COM 278865100 0 -1,272 -100.00 0 -100.00
2022-02-03 2021-12-31 13F ECOLAB COM 278865100 1,272 -125 -8.95 298 2.41 0.1003
2021-10-26 2021-09-30 13F ECOLAB COM 278865100 1,397 -286 -16.99 291 -15.90 0.1041
2021-07-29 2021-06-30 13F ECOLAB COM 278865100 1,683 -310 -15.55 346 -18.97 0.1122
2021-04-26 2021-03-31 13F ECOLAB COM 278865100 1,993 -310 -13.46 427 -14.26 0.1429
2021-02-05 2020-12-31 13F ECOLAB COM 278865100 2,303 -861 -27.21 498 -21.33 0.1696
2020-11-12 2020-09-30 13F ECOLAB COM 278865100 3,164 -2,596 -45.07 633 -44.76 0.2365
2020-08-11 2020-06-30 13F ECOLAB COM 278865100 5,760 135 2.40 1,146 30.82 0.4560
2020-04-29 2020-03-31 13F ECOLAB COM 278865100 5,625 154 2.81 876 -17.05 0.4047
2020-01-29 2019-12-31 13F ECOLAB COM 278865100 5,471 129 2.41 1,056 -0.19 0.4070
2019-10-25 2019-09-30 13F ECOLAB COM 278865100 5,342 876 19.61 1,058 19.95 0.4312
2019-08-01 2019-06-30 13F ECOLAB COM 278865100 4,466 4,466 882 0.3687
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.