American Water Works Company, Inc.
MX ˙ BMV ˙ US0304201033
SecurityMX:AWK / American Water Works Company, Inc.
InstitutionNational Pension Service
Latest Disclosed Ownership281,202 shares
Latest Disclosed Value $ 38,268,780
National Pension Service reports 1.55% increase in ownership of AWK / American Water Works Company, Inc.

On May 12, 2026 - National Pension Service filed a 13F-HR form disclosing ownership of 281,202 shares of American Water Works Company, Inc. (MX:AWK) valued at $38,268,780 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 276,909 shares of American Water Works Company, Inc.. This represents a change in shares of 1.55% 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 AMERICAN WTR WKS CO INC COM 030420103 281,202 4,293 1.55 38,269 5.90 0.0291
2026-02-10 2025-12-31 13F AMERICAN WTR WKS CO INC AMERICAN WTR WKS CO INC NEW 030420103 276,909 31,195 12.70 36,137 5.66 0.0268
2025-11-04 2025-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 245,714 1,395 0.57 34,201 0.63 0.0266
2025-08-08 2025-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 244,319 2,185 0.90 33,987 -4.85 0.0293
2025-05-13 2025-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 242,134 11,745 5.10 35,720 24.54 0.0343
2025-02-05 2024-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 230,389 -17,748 -7.15 28,681 -20.96 0.0271
2024-10-30 2024-09-30 13F AMERICANWTRWKSCOINCNEW COM 030420103 248,137 0 0.00 36,288 13.22 0.0350
2024-08-13 2024-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 248,137 812 0.33 32,049 6.03 0.0368
2024-05-14 2024-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 247,325 11,212 4.75 30,226 -3.01 0.0363
2024-02-07 2023-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 236,113 0 0.00 31,165 1.81 0.0434
2023-11-15 2023-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 236,113 8,404 3.69 30,610 -4.31 0.0490
2023-08-16 2023-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 227,709 12,639 5.88 31,986 1.94 0.0516
2023-05-12 2023-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 215,070 -25 -0.01 31,377 -4.29 0.0571
2023-02-24 2022-12-31 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 215,095 -3,109 -1.42 32,785 12.80 0.0645
2023-02-21 2022-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 215,095 -3,109 33 0.0645
2023-02-24 2022-09-30 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 218,204 1,251 0.58 29,065 -9.95 0.0606
2022-11-18 2022-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 218,204 1,251 29,065 0.0606
2022-08-17 2022-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 216,953 3 0.00 32,276 -10.12 0.0665
2022-05-13 2022-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 216,950 -10,967 -4.81 35,912 -16.57 0.0656
2022-02-15 2021-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 227,917 -19,608 -7.92 43,044 2.87 0.0751
2021-11-18 2021-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 247,525 -11,660 -4.50 41,842 4.74 0.0797
2021-08-17 2021-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 259,185 1,107 0.43 39,948 3.25 0.0759
2021-05-14 2021-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 258,078 -19,363 -6.98 38,691 -9.13 0.0809
2021-02-19 2020-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 277,441 4,222 1.55 42,579 7.81 0.0971
2020-11-13 2020-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 273,219 0 0.00 39,494 12.35 0.1037
2020-08-11 2020-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 273,219 37,854 16.08 35,152 24.92 0.1004
2020-05-27 2020-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 235,365 0 0.00 28,140 -2.68 0.0952
2020-02-21 2019-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 235,365 -6,678 -2.76 28,915 -3.84 0.0793
2019-11-15 2019-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 242,043 12,595 5.49 30,069 12.97 0.0952
2019-08-14 2019-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 229,448 14,682 6.84 26,616 18.86 0.0890
2019-05-15 2019-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 214,766 8,857 4.30 22,392 11.82 0.0861
2019-02-15 2018-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 205,909 9,232 4.69 20,025 15.74 0.0826
2018-11-15 2018-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 196,677 0 0.00 17,302 2.88 0.0704
2018-08-14 2018-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 196,677 3,608 1.87 16,818 6.06 0.0761
2018-04-13 2018-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 193,069 9,904 5.41 15,857 -5.38 0.0786
2018-01-17 2017-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 183,165 2,835 1.57 16,758 14.57 0.0837
2017-10-16 2017-09-30 13F American Water Works COM 030420103 180,330 6,980 4.03 14,627 8.04 0.0805
2017-07-13 2017-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 173,350 15,412 9.76 13,539 11.33 0.0806
2017-04-11 2017-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 157,938 4,907 3.21 12,161 9.83 0.0814
2017-01-18 2016-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 153,031 9,923 6.93 11,073 3.39 0.0757
2016-10-14 2016-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 143,108 12,249 9.36 10,710 -3.16 0.0858
2016-08-11 2016-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 130,859 4,585 3.63 11,059 27.06 0.0982
2016-05-16 2016-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 126,274 5,518 4.57 8,704 20.64 0.0872
2016-02-12 2015-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 120,756 8,006 7.10 7,215 16.18 0.0758
2015-10-15 2015-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 112,750 18,327 19.41 6,210 35.26 0.0785
2015-07-15 2015-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 94,423 14,624 18.33 4,591 6.13 0.0596
2015-04-15 2015-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 79,799 11,743 17.25 4,326 19.27 0.0625
2015-01-13 2014-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 68,056 68,056 3,627 0.0612
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.