American Water Works Company, Inc.
MX ˙ BMV ˙ US0304201033
SecurityMX:AWK / American Water Works Company, Inc.
InstitutionMirova US LLC
Latest Disclosed Ownership750,695 shares
Latest Disclosed Value $ 102,162,083
Mirova US LLC reports 3.98% decrease in ownership of AWK / American Water Works Company, Inc.

On May 11, 2026 - Mirova US LLC filed a 13F-HR form disclosing ownership of 750,695 shares of American Water Works Company, Inc. (MX:AWK) valued at $102,162,083 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 781,818 shares of American Water Works Company, Inc.. This represents a change in shares of -3.98% 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)
2026-05-11 2026-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 750,695 -31,123 -3.98 102,162 0.13 1.1593
2026-02-11 2025-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 781,818 -844,835 -51.94 102,027 -54.94 1.0243
2025-10-20 2025-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 1,626,653 -53,521 -3.19 226,414 -3.13 2.2864
2025-07-23 2025-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 1,680,174 63,469 3.93 233,729 -2.00 2.4193
2025-05-15 2025-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 1,616,705 57,669 3.70 238,496 22.88 2.8326
2025-02-10 2024-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 1,559,036 -45,340 -2.83 194,084 -17.28 2.3278
2024-11-14 2024-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 1,604,376 16,267 1.02 234,624 14.38 2.6916
2024-07-31 2024-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 1,588,109 32,764 2.11 205,120 7.91 2.5534
2024-05-09 2024-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 1,555,345 654,392 72.63 190,079 59.84 2.5553
2024-01-30 2023-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 900,953 -6,016 -0.66 118,917 5.88 1.7918
2023-11-13 2023-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 906,969 36,321 4.17 112,310 -9.64 1.9041
2023-07-24 2023-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 870,648 23,358 2.76 124,285 0.13 2.0689
2023-05-02 2023-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 847,290 9,280 1.11 124,120 -2.83 2.2520
2023-02-09 2022-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 838,010 19,778 2.42 127,729 19.93 2.5660
2022-11-03 2022-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 818,232 -3,019 -0.37 106,501 -12.83 2.4876
2022-07-28 2022-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 821,251 49,891 6.47 122,177 -4.31 2.6309
2022-05-06 2022-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 771,360 41,593 5.70 127,683 -7.36 2.4521
2022-02-14 2021-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 729,767 75,197 11.49 137,823 24.56 2.5892
2021-11-15 2021-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 654,570 59,007 9.91 110,648 20.54 2.5828
2021-08-16 2021-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 595,563 65,557 12.37 91,794 15.53 2.4622
2021-05-17 2021-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 530,006 89,330 20.27 79,458 17.49 2.7657
2021-02-16 2020-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 440,676 72,067 19.55 67,630 26.64 2.9477
2020-11-16 2020-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 368,609 93,442 33.96 53,404 50.85 3.0539
2020-08-14 2020-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 275,167 46,790 20.49 35,403 29.66 3.0861
2020-05-13 2020-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 228,377 -82,012 -26.42 27,304 -28.39 3.6172
2020-02-14 2019-12-31 13F AMERICAN WATER WORKS Common Stock 030420103 310,389 310,389 38,131 5.1643
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.