Ecolab Inc.
MX ˙ BMV ˙ US2788651006
SecurityMX:ECL / Ecolab Inc.
InstitutionBlair William & Co/il
Latest Disclosed Ownership866,411 shares
Latest Disclosed Value $ 230,482,633
Blair William & Co/il reports 1.00% increase in ownership of ECL / Ecolab Inc.

On May 8, 2026 - Blair William & Co/il filed a 13F-HR form disclosing ownership of 866,411 shares of Ecolab Inc. (MX:ECL) valued at $230,482,633 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 857,871 shares of Ecolab Inc.. This represents a change in shares of 1.00% 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 866,411 8,540 1.00 230,483 2.34 0.6605
2026-02-17 2025-12-31 13F ECOLAB COM 278865100 857,871 63,728 8.02 225,208 3.55 0.4677
2025-11-12 2025-09-30 13F ECOLAB COM 278865100 794,143 -11,013 -1.37 217,484 0.25 0.5789
2025-07-24 2025-06-30 13F ECOLAB COM 278865100 805,156 -8,977 -1.10 216,941 5.11 0.6026
2025-05-09 2025-03-31 13F ECOLAB COM 278865100 814,133 -29,901 -3.54 206,399 4.36 0.6225
2025-02-12 2024-12-31 13F ECOLAB COM 278865100 844,034 -24,725 -2.85 197,774 -10.84 0.5753
2024-11-12 2024-09-30 13F ECOLAB COM 278865100 868,759 -17,591 -1.98 221,820 5.15 0.6515
2024-08-12 2024-06-30 13F ECOLAB COM 278865100 886,350 -13,652 -1.52 210,951 1.51 0.6507
2024-05-09 2024-03-31 13F ECOLAB COM 278865100 900,002 -10,044 -1.10 207,810 15.13 0.6527
2024-02-12 2023-12-31 13F ECOLAB COM 278865100 910,046 -37,004 -3.91 180,508 12.51 0.6151
2023-11-09 2023-09-30 13F ECOLAB COM 278865100 947,050 -159 -0.02 160,430 -9.28 0.6153
2023-08-11 2023-06-30 13F ECOLAB COM 278865100 947,209 10,942 1.17 176,834 14.10 0.6478
2023-05-12 2023-03-31 13F ECOLAB COM 278865100 936,267 13,798 1.50 154,980 15.42 0.6191
2023-02-10 2022-12-31 13F ECOLAB COM 278865100 922,469 -2,883 -0.31 134,275 0.48 0.5839
2022-11-09 2022-09-30 13F ECOLAB COM 278865100 925,352 5,317 0.58 133,639 -5.53 0.6138
2022-08-10 2022-06-30 13F ECOLAB COM 278865100 920,035 -275,634 -23.05 141,465 -32.99 0.6276
2022-05-13 2022-03-31 13F ECOLAB COM 278865100 1,195,669 -89,147 -6.94 211,107 -29.96 0.7400
2022-02-14 2021-12-31 13F ECOLAB COM 278865100 1,284,816 26,904 2.14 301,405 14.85 0.9453
2021-11-12 2021-09-30 13F ECOLAB COM 278865100 1,257,912 -144,587 -10.31 262,426 -9.16 0.8933
2021-08-12 2021-06-30 13F ECOLAB COM 278865100 1,402,499 56,714 4.21 288,873 0.27 1.0010
2021-05-13 2021-03-31 13F ECOLAB COM 278865100 1,345,785 77,161 6.08 288,092 4.96 1.0868
2021-02-09 2020-12-31 13F ECOLAB COM 278865100 1,268,624 71,817 6.00 274,479 14.76 1.0063
2020-11-06 2020-09-30 13F ECOLAB COM 278865100 1,196,807 127,046 11.88 239,170 12.38 1.0144
2020-08-12 2020-06-30 13F ECOLAB COM 278865100 1,069,761 67,512 6.74 212,829 36.27 1.0148
2020-05-11 2020-03-31 13F ECOLAB COM 278865100 1,002,249 23,508 2.40 156,180 -17.32 0.9762
2020-02-13 2019-12-31 13F ECOLAB COM 278865100 978,741 18,242 1.90 188,887 -0.70 0.9708
2019-11-12 2019-09-30 13F ECOLAB COM 278865100 960,499 11,219 1.18 190,217 1.49 1.0960
2019-08-13 2019-06-30 13F ECOLAB COM 278865100 949,280 12,351 1.32 187,426 13.31 1.0717
2019-05-14 2019-03-31 13F ECOLAB COM 278865100 936,929 14,049 1.52 165,405 21.63 1.0084
2019-02-14 2018-12-31 13F ECOLAB COM 278865100 922,880 6,494 0.71 135,986 -5.35 0.9931
2018-11-13 2018-09-30 13F ECOLAB COM 278865100 916,386 11,832 1.31 143,671 13.18 0.8803
2018-08-13 2018-06-30 13F ECOLAB COM 278865100 904,554 12,815 1.44 126,936 3.85 0.8633
2018-05-15 2018-03-31 13F ECOLAB COM 278865100 891,739 -3,377 -0.38 122,231 1.77 0.8644
2018-02-14 2017-12-31 13F ECOLAB COM 278865100 895,116 21,405 2.45 120,107 6.89 0.8153
2017-11-13 2017-09-30 13F ECOLAB COM 278865100 873,711 -3,318 -0.38 112,368 -3.49 0.8426
2017-08-04 2017-06-30 13F ECOLAB COM 278865100 877,029 12,142 1.40 116,426 7.95 0.8742
2017-05-10 2017-03-31 13F ECOLAB COM 278865100 864,887 45,400 5.54 107,852 12.28 0.8692
2017-02-14 2016-12-31 13F ECOLAB COM 278865100 819,487 15,087 1.88 96,060 -1.89 0.8592
2016-11-14 2016-09-30 13F ECOLAB COM 278865100 804,400 25,025 3.21 97,912 5.93 0.8654
2016-08-08 2016-06-30 13F ECOLAB COM 278865100 779,375 2,165 0.28 92,434 6.65 0.8619
2016-05-16 2016-03-31 13F ECOLAB COM 278865100 777,210 -8,194 -1.04 86,674 -3.52 0.8160
2016-02-16 2015-12-31 13F ECOLAB COM 278865100 785,404 8,732 1.12 89,834 5.42 0.8435
2015-11-12 2015-09-30 13F ECOLAB COM 278865100 776,672 5,962 0.77 85,216 -2.21 0.7372
2015-08-03 2015-06-30 13F ECOLAB COM 278865100 770,710 -51,899 -6.31 87,144 -7.38 0.1303
2015-05-11 2015-03-31 13F ECOLAB COM 278865100 822,609 822,609 0.00 94,089 0.1448
2015-02-05 2014-12-31 13F ECOLAB COM 278865100 0 -1,151,691 -100.00 0 -100.00
2014-11-04 2014-09-30 13F ECOLAB COM 278865100 1,151,691 -7,259 -0.63 132,248 2.49 0.2262
2014-08-01 2014-06-30 13F ECOLAB COM 278865100 1,158,950 -55,444 -4.57 129,037 -1.61 0.2107
2014-05-06 2014-03-31 13F ECOLAB COM 278865100 1,214,394 -15,003 -1.22 131,142 2.30 0.2169
2014-02-11 2013-12-31 13F ECOLAB COM 278865100 1,229,397 -45,887 -3.60 128,188 1.78 0.2119
2013-11-12 2013-09-30 13F ECOLAB COM 278865100 1,275,284 -11,783 -0.92 125,946 14.87 0.2240
2013-08-07 2013-06-30 13F ECOLAB COM 278865100 1,287,067 1,287,067 109,645 0.2168
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.