Ecolab Inc.
MX ˙ BMV ˙ US2788651006
SecurityMX:ECL / Ecolab Inc.
InstitutionRosenberg Matthew Hamilton
Latest Disclosed Ownership494 shares
Latest Disclosed Value $ 131,414
Rosenberg Matthew Hamilton reports 1.98% decrease in ownership of ECL / Ecolab Inc.

On April 6, 2026 - Rosenberg Matthew Hamilton filed a 13F-HR form disclosing ownership of 494 shares of Ecolab Inc. (MX:ECL) valued at $131,414 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 5, 2026 disclosing 504 shares of Ecolab Inc.. This represents a change in shares of -1.98% 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)
2026-04-06 2026-03-31 13F ECOLAB INC COM Stock 278865100 494 -10 -1.98 131 -0.76 0.0269
2026-01-05 2025-12-31 13F ECOLAB INC COM Stock 278865100 504 17 3.49 132 -0.75 0.0274
2025-11-10 2025-09-30 13F ECOLAB INC COM Stock 278865100 487 0 0.00 133 1.53 0.0288
2025-07-28 2025-06-30 13F ECOLAB INC COM Stock 278865100 487 43 9.68 131 16.96 0.0305
2025-04-28 2025-03-31 13F ECOLAB INC COM Stock 278865100 444 0 0.00 113 7.69 0.0282
2025-01-14 2024-12-31 13F ECOLAB INC COM Stock 278865100 444 0 0.00 104 -7.96 0.0270
2024-10-28 2024-09-30 13F ECOLAB INC COM Stock 278865100 444 0 0.00 113 8.65 0.0297
2024-07-26 2024-06-30 13F ECOLAB INC COM Stock 278865100 444 0 0.00 105 2.97 0.0309
2024-04-22 2024-03-31 13F ECOLAB INC COM Stock 278865100 444 0 0.00 101 14.77 0.0292
2024-01-16 2023-12-31 13F ECOLAB INC COM Stock 278865100 444 0 0.00 88 17.33 0.0271
2023-10-11 2023-09-30 13F ECOLAB INC COM Stock 278865100 444 0 0.00 75 -8.54 0.0251
2023-07-26 2023-06-30 13F ECOLAB INC COM Stock 278865100 444 0 0.00 83 12.33 0.0280
2023-04-17 2023-03-31 13F ECOLAB INC COM Stock 278865100 444 0 0.00 73 14.06 0.0237
2023-01-19 2022-12-31 13F ECOLAB INC COM Stock 278865100 444 0 0.00 65 0.00 0.0219
2022-10-21 2022-09-30 13F ECOLAB INC COM Stock 278865100 444 34 8.29 64 -1.54 0.0247
2022-07-15 2022-06-30 13F ECOLAB INC COM Stock 278865100 410 -92 -18.33 65 -26.97 0.0245
2022-04-14 2022-03-31 13F ECOLAB INC COM Stock 278865100 502 25 5.24 89 -20.54 0.0311
2022-01-20 2021-12-31 13F ECOLAB COM 278865100 477 -38 -7.38 112 4.67 0.0399
2021-10-12 2021-09-30 13F ECOLAB COM 278865100 515 28 5.75 107 7.00 0.0423
2021-07-26 2021-06-30 13F ECOLAB COM 278865100 487 0 0.00 100 -3.85 0.0520
2021-04-30 2021-03-31 13F ECOLAB COM 278865100 487 0 0.00 104 -0.95 0.0593
2021-02-03 2020-12-31 13F ECOLAB COM 278865100 487 0 0.00 105 8.25 0.0655
2020-10-16 2020-09-30 13F ECOLAB COM 278865100 487 0 0.00 97 0.00 0.0713
2020-08-04 2020-06-30 13F ECOLAB COM 278865100 487 87 21.75 97 53.97 0.0773
2020-05-14 2020-03-31 13F ECOLAB COM 278865100 400 400 63 0.0627
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.