American Water Works Company, Inc.
MX ˙ BMV ˙ US0304201033
SecurityMX:AWK / American Water Works Company, Inc.
InstitutionTrillium Asset Management, Llc
Latest Disclosed Ownership237,684 shares
Latest Disclosed Value $ 30,983,847
Trillium Asset Management, Llc reports 2.03% increase in ownership of AWK / American Water Works Company, Inc.

On May 11, 2026 - Trillium Asset Management, Llc filed a 13F-HR form disclosing ownership of 237,684 shares of American Water Works Company, Inc. (MX:AWK) valued at $30,983,847 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 232,962 shares of American Water Works Company, Inc.. This represents a change in shares of 2.03% 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 237,684 4,722 2.03 30,984 1.00 1.0280
2026-02-13 2025-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 232,962 -42,724 -15.50 30,677 -20.05 0.9389
2025-11-14 2025-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 275,686 -25,816 -8.56 38,373 -8.51 1.0135
2025-08-06 2025-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 301,502 -12,582 -4.01 41,942 -9.48 1.1283
2025-05-13 2025-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 314,084 -10,396 -3.20 46,333 14.70 1.3333
2025-02-11 2024-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 324,480 -507 -0.16 40,395 -15.01 1.0471
2024-11-07 2024-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 324,987 -7,110 -2.14 47,526 10.80 1.1670
2024-08-08 2024-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 332,097 -10,737 -3.13 42,893 2.38 1.0833
2024-05-09 2024-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 342,834 31,479 10.11 41,897 1.95 1.0664
2024-02-08 2023-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 311,355 4,803 1.57 41,096 8.26 1.1196
2023-11-08 2023-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 306,552 -2,129 -0.69 37,960 -13.85 1.1438
2023-08-10 2023-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 308,681 -29,334 -8.68 44,063 -12.03 1.2350
2023-05-09 2023-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 338,015 19,010 5.96 50,089 3.02 1.4678
2023-02-08 2022-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 319,005 -3,985 -1.23 48,623 15.66 1.4969
2022-11-09 2022-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 322,990 -4,697 -1.43 42,040 -13.92 1.3772
2022-08-08 2022-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 327,687 21,187 6.91 48,839 -3.74 1.4980
2022-05-04 2022-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 306,500 -5,000 -1.61 50,735 -13.76 1.3494
2022-02-08 2021-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 311,500 9,489 3.14 58,830 15.24 1.3798
2021-11-12 2021-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 302,011 7,844 2.67 51,052 12.73 1.3478
2021-11-12 2021-06-30 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 294,167 11,712 4.15 45,285 6.94 1.2513
2021-08-06 2021-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 294,167 11,712 45,285 0.9906
2021-05-10 2021-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 282,455 13,334 4.95 42,345 2.53 1.3366
2021-02-12 2020-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 269,121 -958 -0.35 41,302 5.55 1.4835
2020-11-09 2020-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 270,079 -19,306 -6.67 39,129 5.10 1.6485
2020-08-06 2020-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 289,385 3,069 1.07 37,232 8.76 1.5916
2020-05-07 2020-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 286,316 17,485 6.50 34,233 3.66 1.7982
2020-02-10 2019-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 268,831 -88,170 -24.70 33,025 -25.54 1.4702
2019-11-06 2019-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 357,001 -8,145 -2.23 44,350 4.71 2.0723
2019-08-08 2019-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 365,146 -3,209 -0.87 42,357 10.29 2.0447
2019-05-06 2019-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 368,355 420 0.11 38,404 14.99 1.9417
2019-02-08 2018-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 367,935 -1,917 -0.52 33,398 2.65 1.9290
2018-11-09 2018-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 369,852 12,422 3.48 32,536 6.62 1.6250
2018-08-01 2018-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 357,430 2,823 0.80 30,517 4.78 1.6334
2018-05-09 2018-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 354,607 66 0.02 29,124 -10.21 1.6056
2018-02-01 2017-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 354,541 -6,614 -1.83 32,437 11.01 1.7833
2017-11-02 2017-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 361,155 3,197 0.89 29,221 4.72 1.6703
2017-08-03 2017-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 357,958 61,734 20.84 27,903 21.12 1.6652
2017-05-02 2017-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 296,224 -3,019 -1.01 23,038 6.39 1.4718
2017-01-23 2016-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 299,243 -3,197 -1.06 21,654 -4.33 1.4247
2016-10-27 2016-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 302,440 156,978 107.92 22,634 84.12 1.4526
2016-07-28 2016-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 145,462 145,462 12,293 0.8109
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.