Ecolab Inc.
MX ˙ BMV ˙ US2788651006
SecurityMX:ECL / Ecolab Inc.
InstitutionRenaissance Technologies Llc
ManagerJames Simons
Latest Disclosed Ownership313,397 shares
Latest Disclosed Value $ 83,369,870
Renaissance Technologies Llc ownership in ECL / Ecolab Inc.

On May 14, 2026 - Renaissance Technologies Llc filed a 13F-HR form disclosing ownership of 313,397 shares of Ecolab Inc. (MX:ECL) valued at $83,369,870 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 0 shares of Ecolab Inc..

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)
2026-05-14 2026-03-31 13F ECOLAB COM 278865100 313,397 313,397 83,370 0.1304
2026-02-12 2025-12-31 13F ECOLAB COM 278865100 0 -104,142 -100.00 0 -100.00
2025-11-13 2025-09-30 13F ECOLAB COM 278865100 104,142 -272,155 -72.32 28,520 -71.87 0.0376
2025-08-13 2025-06-30 13F ECOLAB COM 278865100 376,297 -461,900 -55.11 101,389 -52.29 0.1349
2025-05-14 2025-03-31 13F ECOLAB COM 278865100 838,197 526,700 169.09 212,500 191.14 0.3216
2025-02-13 2024-12-31 13F ECOLAB COM 278865100 311,497 156,200 100.58 72,990 84.08 0.1080
2024-11-13 2024-09-30 13F ECOLAB COM 278865100 155,297 -155,900 -50.10 39,652 -46.46 0.0596
2024-08-09 2024-06-30 13F ECOLAB COM 278865100 311,197 -243,659 -43.91 74,065 57,762.50 0.1256
2024-05-13 2024-03-31 13F ECOLAB COM 278865100 554,856 305,059 122.12 128 161.22 0.2014
2024-02-13 2023-12-31 13F ECOLAB COM 278865100 249,797 -100,300 -28.65 50 -16.95 0.0767
2023-11-14 2023-09-30 13F ECOLAB COM 278865100 350,097 112,700 47.47 59 34.09 0.1011
2023-08-11 2023-06-30 13F ECOLAB COM 278865100 237,397 -169,300 -41.63 44 -34.33 0.0639
2023-05-12 2023-03-31 13F ECOLAB COM 278865100 406,697 255,500 168.98 67 204.55 0.0893
2023-02-13 2022-12-31 13F ECOLAB COM 278865100 151,197 151,197 22 0.0301
2022-11-14 2022-09-30 13F ECOLAB COM 278865100 0 -222,614 -100.00 0 -100.00
2022-08-12 2022-06-30 13F ECOLAB COM 278865100 222,614 -682,383 -75.40 34,229 -78.58 0.0405
2022-05-13 2022-03-31 13F ECOLAB COM 278865100 904,997 734,000 429.25 159,786 298.33 0.1875
2022-02-11 2021-12-31 13F ECOLAB COM 278865100 170,997 170,997 40,114 0.0499
2021-11-12 2021-09-30 13F ECOLAB COM 278865100 0 -195,497 -100.00 0 -100.00
2021-08-13 2021-06-30 13F ECOLAB COM 278865100 195,497 195,497 40,267 0.0503
2020-08-13 2020-06-30 13F ECOLAB COM 278865100 0 -122,222 -100.00 0 -100.00
2020-05-14 2020-03-31 13F ECOLAB COM 278865100 122,222 -154,700 -55.86 19,046 -64.36 0.0185
2020-02-13 2019-12-31 13F ECOLAB COM 278865100 276,922 276,922 53,443 0.0411
2018-11-13 2018-09-30 13F ECOLAB COM 278865100 0 -72,522 -100.00 0 -100.00
2018-08-13 2018-06-30 13F ECOLAB COM 278865100 72,522 0 0.00 9,941 0.00 0.0109
2018-05-14 2018-03-31 13F ECOLAB COM 278865100 72,522 1,800 2.55 9,941 4.76 0.0109
2018-02-13 2017-12-31 13F ECOLAB COM 278865100 70,722 -403,100 -85.07 9,489 -84.02 0.0105
2017-05-12 2017-03-31 13F ECOLAB COM 278865100 473,822 473,822 569.98 59,389 525.87 0.0830
2017-02-13 2016-12-31 13F ECOLAB COM 278865100 0 -139,622 -100.00 0 -100.00
2016-11-14 2016-09-30 13F ECOLAB COM 278865100 139,622 139,622 0.00 16,995 0.0300
2016-05-13 2016-03-31 13F ECOLAB COM 278865100 0 -119,222 -100.00 0 -100.00
2016-02-11 2015-12-31 13F ECOLAB COM 278865100 119,222 119,222 0.00 13,637 0.0297
2015-11-12 2015-09-30 13F ECOLAB COM 278865100 0 -250,722 -100.00 0 -100.00
2015-08-14 2015-06-30 13F ECOLAB COM 278865100 250,722 -387,600 -60.72 28,349 -61.17 0.0646
2015-05-13 2015-03-31 13F ECOLAB COM 278865100 638,322 227,300 55.30 73,011 69.95 0.1555
2015-02-13 2014-12-31 13F ECOLAB COM 278865100 411,022 222,500 118.02 42,960 98.45 0.1037
2014-11-12 2014-09-30 13F ECOLAB COM 278865100 188,522 -336,700 -64.11 21,648 -62.98 0.0593
2014-08-13 2014-06-30 13F ECOLAB COM 278865100 525,222 19,804 3.92 58,478 7.14 0.1363
2014-05-14 2014-03-31 13F ECOLAB COM 278865100 505,418 240,496 90.78 54,580 97.59 0.1309
2014-02-14 2013-12-31 13F ECOLAB COM 278865100 264,922 264,922 27,623 0.0661
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.