Ecolab Inc.
MX ˙ BMV ˙ US2788651006
SecurityMX:ECL / Ecolab Inc.
InstitutionNational Pension Service
Latest Disclosed Ownership762,436 shares
Latest Disclosed Value $ 202,823,225
National Pension Service reports 3.28% decrease in ownership of ECL / Ecolab Inc.

On May 12, 2026 - National Pension Service filed a 13F-HR form disclosing ownership of 762,436 shares of Ecolab Inc. (MX:ECL) valued at $202,823,225 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 788,288 shares of Ecolab Inc.. This represents a change in shares of -3.28% 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)
2026-05-12 2026-03-31 13F ECOLAB COM 278865100 762,436 -25,852 -3.28 202,823 -1.99 0.1540
2026-02-10 2025-12-31 13F ECOLAB ECOLAB INC 278865100 788,288 190,375 31.84 206,941 26.38 0.1532
2025-11-04 2025-09-30 13F ECOLAB COM 278865100 597,913 9,837 1.67 163,744 3.34 0.1272
2025-08-08 2025-06-30 13F ECOLAB COM 278865100 588,076 -264,206 -31.00 158,451 -26.67 0.1368
2025-05-13 2025-03-31 13F ECOLAB COM 278865100 852,282 85,488 11.15 216,071 20.26 0.2077
2025-02-05 2024-12-31 13F ECOLAB COM 278865100 766,794 50,576 7.06 179,675 -1.75 0.1700
2024-10-30 2024-09-30 13F ECOLABINC COM 278865100 716,218 87,209 13.86 182,872 22.16 0.1764
2024-08-13 2024-06-30 13F ECOLAB COM 278865100 629,009 -2,745 -0.43 149,704 2.63 0.1720
2024-05-14 2024-03-31 13F ECOLAB COM 278865100 631,754 19,395 3.17 145,872 20.10 0.1750
2024-02-07 2023-12-31 13F ECOLAB COM 278865100 612,359 21,208 3.59 121,461 21.61 0.1691
2023-11-15 2023-09-30 13F ECOLAB COM 278865100 591,151 16,089 2.80 99,881 -5.54 0.1598
2023-08-16 2023-06-30 13F ECOLAB COM 278865100 575,062 201,326 53.87 105,742 73.28 0.1706
2023-05-12 2023-03-31 13F ECOLAB COM 278865100 373,736 -8,009 -2.10 61,024 9.82 0.1111
2023-02-24 2022-12-31 13F/A-1 ECOLAB COM 278865100 381,745 4,809 1.28 55,567 1.03 0.1093
2023-02-21 2022-12-31 13F ECOLAB COM 278865100 381,745 4,809 56 0.1093
2023-02-24 2022-09-30 13F/A-1 ECOLAB COM 278865100 376,936 28,355 8.13 55,003 2.62 0.1148
2022-11-18 2022-09-30 13F ECOLAB COM 278865100 376,936 28,355 55,003 0.1148
2022-08-17 2022-06-30 13F ECOLAB COM 278865100 348,581 24,118 7.43 53,598 -6.44 0.1105
2022-05-13 2022-03-31 13F ECOLAB COM 278865100 324,463 -35,518 -9.87 57,287 -32.16 0.1046
2022-02-15 2021-12-31 13F ECOLAB COM 278865100 359,981 1,290 0.36 84,448 12.85 0.1473
2021-11-18 2021-09-30 13F ECOLAB COM 278865100 358,691 -620 -0.17 74,830 1.11 0.1425
2021-08-17 2021-06-30 13F ECOLAB COM 278865100 359,311 3,094 0.87 74,007 -2.95 0.1406
2021-05-14 2021-03-31 13F ECOLAB COM 278865100 356,217 18,590 5.51 76,255 4.39 0.1595
2021-02-19 2020-12-31 13F ECOLAB COM 278865100 337,627 -1,393 -0.41 73,049 8.68 0.1665
2020-11-13 2020-09-30 13F ECOLAB COM 278865100 339,020 0 0.00 67,217 -0.34 0.1765
2020-08-11 2020-06-30 13F ECOLAB COM 278865100 339,020 9,599 2.91 67,448 31.39 0.1926
2020-05-27 2020-03-31 13F ECOLAB COM 278865100 329,421 4,583 1.41 51,334 -18.11 0.1737
2020-02-21 2019-12-31 13F ECOLAB COM 278865100 324,838 -758 -0.23 62,690 -2.78 0.1720
2019-11-15 2019-09-30 13F ECOLAB COM 278865100 325,596 15,426 4.97 64,481 5.29 0.2040
2019-08-14 2019-06-30 13F ECOLAB COM 278865100 310,170 16,079 5.47 61,240 17.95 0.2047
2019-05-15 2019-03-31 13F ECOLAB COM 278865100 294,091 10,849 3.83 51,919 13.42 0.1997
2019-02-15 2018-12-31 13F ECOLAB COM 278865100 283,242 12,183 4.49 45,775 7.71 0.1888
2018-11-15 2018-09-30 13F ECOLAB COM 278865100 271,059 1,855 0.69 42,497 12.69 0.1730
2018-08-14 2018-06-30 13F ECOLAB COM 278865100 269,204 7,115 2.71 37,710 4.97 0.1706
2018-04-13 2018-03-31 13F ECOLAB COM 278865100 262,089 28,456 12.18 35,925 14.60 0.1781
2018-01-17 2017-12-31 13F ECOLAB COM 278865100 233,633 -1,701 -0.72 31,349 3.05 0.1565
2017-10-16 2017-09-30 13F Ecolab COM 278865100 235,334 9,327 4.13 30,422 2.40 0.1674
2017-07-13 2017-06-30 13F ECOLAB COM 278865100 226,007 20,119 9.77 29,709 15.12 0.1770
2017-04-11 2017-03-31 13F ECOLAB COM 278865100 205,888 11,827 6.09 25,806 13.44 0.1728
2017-01-18 2016-12-31 13F ECOLAB COM 278865100 194,061 13,533 7.50 22,748 3.52 0.1556
2016-10-14 2016-09-30 13F ECOLAB COM 278865100 180,528 14,304 8.61 21,974 11.46 0.1761
2016-08-11 2016-06-30 13F ECOLAB COM 278865100 166,224 11,702 7.57 19,714 14.40 0.1750
2016-05-16 2016-03-31 13F ECOLAB COM 278865100 154,522 6,153 4.15 17,232 1.54 0.1726
2016-02-12 2015-12-31 13F ECOLAB COM 278865100 148,369 9,017 6.47 16,970 10.99 0.1782
2015-10-15 2015-09-30 13F ECOLAB COM 278865100 139,352 14,553 11.66 15,290 8.36 0.1933
2015-07-15 2015-06-30 13F ECOLAB COM 278865100 124,799 18,044 16.90 14,111 15.56 0.1831
2015-04-15 2015-03-31 13F ECOLAB COM 278865100 106,755 14,382 15.57 12,211 26.47 0.1764
2015-01-13 2014-12-31 13F ECOLAB COM 278865100 92,373 -8,650 -8.56 9,655 -16.77 0.1629
2014-11-07 2014-09-30 13F ECOLAB COM 278865100 101,023 101,023 11,600 0.1842
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.