Ecolab Inc.
MX ˙ BMV ˙ US2788651006
SecurityMX:ECL / Ecolab Inc.
InstitutionGrandfield & Dodd, Llc
Latest Disclosed Ownership31,384 shares
Latest Disclosed Value $ 8,348,772
Grandfield & Dodd, Llc reports 0.65% increase in ownership of ECL / Ecolab Inc.

On May 7, 2026 - Grandfield & Dodd, Llc filed a 13F-HR form disclosing ownership of 31,384 shares of Ecolab Inc. (MX:ECL) valued at $8,348,772 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 31,181 shares of Ecolab Inc.. This represents a change in shares of 0.65% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-07 2026-03-31 13F ECOLAB COM 278865100 31,384 203 0.65 8,349 1.99 0.4714
2026-02-10 2025-12-31 13F ECOLAB COM 278865100 31,181 383 1.24 8,186 -2.95 0.4636
2025-10-30 2025-09-30 13F ECOLAB COM 278865100 30,798 744 2.48 8,434 4.16 0.4785
2025-08-08 2025-06-30 13F ECOLAB COM 278865100 30,054 70 0.23 8,098 6.53 0.4742
2025-05-02 2025-03-31 13F ECOLAB COM 278865100 29,984 0 0.00 7,602 8.20 0.4713
2025-02-06 2024-12-31 13F ECOLAB COM 278865100 29,984 -143 -0.47 7,026 -8.67 0.4332
2024-11-08 2024-09-30 13F ECOLAB COM 278865100 30,127 -100 -0.33 7,692 6.92 0.4558
2024-08-09 2024-06-30 13F ECOLAB COM 278865100 30,227 0 0.00 7,194 3.08 0.4555
2024-05-06 2024-03-31 13F ECOLAB COM 278865100 30,227 0 0.00 6,979 16.41 0.4404
2024-01-31 2023-12-31 13F ECOLAB COM 278865100 30,227 -550 -1.79 5,996 15.00 0.4143
2023-10-26 2023-09-30 13F ECOLAB COM 278865100 30,777 -150 -0.49 5,214 -9.70 0.3830
2023-08-08 2023-06-30 13F ECOLAB COM 278865100 30,927 -165 -0.53 5,774 12.18 0.4036
2023-04-28 2023-03-31 13F ECOLAB COM 278865100 31,092 250 0.81 5,147 14.64 0.3597
2023-01-20 2022-12-31 13F ECOLAB COM 278865100 30,842 -54 -0.17 4,489 0.65 0.3285
2022-11-04 2022-09-30 13F ECOLAB COM 278865100 30,896 -240 -0.77 4,460 -6.89 0.3641
2022-08-01 2022-06-30 13F ECOLAB COM 278865100 31,136 -894 -2.79 4,790 -15.37 0.3773
2022-04-19 2022-03-31 13F ECOLAB COM 278865100 32,030 -85 -0.26 5,660 -24.83 0.3841
2022-02-08 2021-12-31 13F ECOLAB COM 278865100 32,115 0 0.00 7,530 12.39 0.4844
2021-10-28 2021-09-30 13F ECOLAB COM 278865100 32,115 1,502 4.91 6,700 6.18 0.4677
2021-07-28 2021-06-30 13F ECOLAB COM 278865100 30,613 -137 -0.45 6,310 -4.10 0.4367
2021-04-22 2021-03-31 13F ECOLAB COM 278865100 30,750 -155 -0.50 6,580 -1.64 0.4919
2021-01-29 2020-12-31 13F ECOLAB COM 278865100 30,905 -265 -0.85 6,690 7.38 0.5249
2020-11-03 2020-09-30 13F ECOLAB COM 278865100 31,170 -500 -1.58 6,230 -1.11 0.5611
2020-07-24 2020-06-30 13F ECOLAB COM 278865100 31,670 -141 -0.44 6,300 27.09 0.6095
2020-05-14 2020-03-31 13F ECOLAB COM 278865100 31,811 186 0.59 4,957 -18.78 0.5845
2020-02-07 2019-12-31 13F ECOLAB COM 278865100 31,625 -670 -2.07 6,103 -4.58 0.5560
2019-10-30 2019-09-30 13F ECOLAB COM 278865100 32,295 -225 -0.69 6,396 -0.39 0.6293
2019-07-29 2019-06-30 13F ECOLAB COM 278865100 32,520 -425 -1.29 6,421 10.40 0.6347
2019-04-26 2019-03-31 13F ECOLAB COM 278865100 32,945 39 0.12 5,816 19.94 0.6057
2019-02-12 2018-12-31 13F ECOLAB COM 278865100 32,906 0 0.00 4,849 -6.01 0.5739
2018-11-02 2018-09-30 13F ECOLAB COM 278865100 32,906 -316 -0.95 5,159 10.66 0.5316
2018-07-27 2018-06-30 13F ECOLAB COM 278865100 33,222 -60 -0.18 4,662 2.19 0.5122
2018-05-04 2018-03-31 13F/A-1 ECOLAB COM 278865100 33,282 -300 -0.89 4,562 1.24 0.5089
2018-05-04 2018-03-31 13F ECOLAB COM 278865100 33,282 -300 4,562
2018-02-05 2017-12-31 13F ECOLAB COM 278865100 33,582 -550 -1.61 4,506 2.64 0.4810
2017-11-03 2017-09-30 13F ECOLAB COM 278865100 34,132 0 0.00 4,390 -3.11 0.4929
2017-07-27 2017-06-30 13F ECOLAB COM 278865100 34,132 -125 -0.36 4,531 5.52 0.5354
2017-04-28 2017-03-31 13F ECOLAB COM 278865100 34,257 -3,500 -9.27 4,294 -2.98 0.5304
2017-02-02 2016-12-31 13F ECOLAB COM 278865100 37,757 -25 -0.07 4,426 -3.76 0.5736
2016-10-24 2016-09-30 13F ECOLAB COM 278865100 37,782 -100 -0.26 4,599 2.36 0.6042
2016-07-28 2016-06-30 13F ECOLAB COM 278865100 37,882 -300 -0.79 4,493 5.52 0.6289
2016-05-06 2016-03-31 13F ECOLAB COM 278865100 38,182 0 0.00 4,258 -2.50 0.6162
2016-02-03 2015-12-31 13F ECOLAB COM 278865100 38,182 -250 -0.65 4,367 3.56 0.6638
2015-11-02 2015-09-30 13F ECOLAB COM 278865100 38,432 485 1.28 4,217 -1.72 0.7072
2015-08-03 2015-06-30 13F ECOLAB COM 278865100 37,947 -2,499 -6.18 4,291 -7.24 0.6564
2015-05-15 2015-03-31 13F ECOLAB COM 278865100 40,446 -1,450 -3.46 4,626 5.64 0.7072
2015-02-05 2014-12-31 13F ECOLAB COM 278865100 41,896 -1,412 -3.26 4,379 -11.94 0.6769
2014-11-10 2014-09-30 13F ECOLAB COM 278865100 43,308 -364 -0.83 4,973 2.28 0.7814
2014-08-14 2014-06-30 13F ECOLAB COM 278865100 43,672 -7,400 -14.49 4,862 -11.84 0.7335
2014-05-06 2014-03-31 13F ECOLAB COM 278865100 51,072 -750 -1.45 5,515 2.07 0.8657
2014-02-06 2013-12-31 13F ECOLAB COM 278865100 51,822 -267 -0.51 5,403 5.03 0.8779
2013-11-04 2013-09-30 13F ECOLAB COM 278865100 52,089 -100 -0.19 5,144 15.70 0.9173
2013-08-01 2013-06-30 13F ECOLAB COM 278865100 52,189 52,189 4,446 0.8421
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.