American Water Works Company, Inc.
MX ˙ BMV ˙ US0304201033
SecurityMX:AWK / American Water Works Company, Inc.
InstitutionMassachusetts Financial Services Co /ma/
Latest Disclosed Ownership2,620 shares
Latest Disclosed Value $ 356,556
Massachusetts Financial Services Co /ma/ reports 1.55% increase in ownership of AWK / American Water Works Company, Inc.

On May 14, 2026 - Massachusetts Financial Services Co /ma/ filed a 13F-HR form disclosing ownership of 2,620 shares of American Water Works Company, Inc. (MX:AWK) valued at $356,556 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 22, 2026 disclosing 2,580 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)
2026-05-14 2026-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 2,620 40 1.55 357 5.95 0.0001
2026-01-22 2025-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 2,580 772 42.70 337 33.86 0.0001
2025-10-29 2025-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 1,808 1,808 252 0.0001
2023-11-08 2023-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 0 -3,696 -100.00 0 -100.00
2023-08-09 2023-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 3,696 0 0.00 528 -2.59 0.0002
2023-05-10 2023-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 3,696 0 0.00 541 -3.91 0.0002
2023-02-13 2022-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 3,696 -340 -8.42 563 7.24 0.0002
2022-11-09 2022-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 4,036 0 0.00 525 -12.50 0.0002
2022-08-09 2022-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 4,036 -60,743 -93.77 600 -94.40 0.0002
2022-05-11 2022-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 64,779 -35,193 -35.20 10,723 -43.21 0.0032
2022-02-10 2021-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 99,972 -18,840 -15.86 18,881 -5.99 0.0052
2021-11-10 2021-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 118,812 3,516 3.05 20,084 13.02 0.0059
2021-08-13 2021-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 115,296 4,670 4.22 17,770 7.14 0.0052
2021-05-13 2021-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 110,626 421 0.38 16,586 103,562.50 0.0051
2021-05-12 2020-12-31 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 110,205 -1,685 -1.51 17 0.00 0.0054
2021-02-12 2020-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 110,205 -1,685 17 0.0054
2020-11-12 2020-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 111,890 36,109 47.65 16 77.78 0.0059
2020-11-20 2020-06-30 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 75,781 -2,867 -3.65 10 -99.90 0.0038
2020-08-11 2020-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 75,781 -2,867 9,750 3,847.5377
2020-11-20 2020-03-31 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 78,648 -6,520 -7.66 9,403 -10.13 0.0045
2020-05-14 2020-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 78,648 -6,520 9,403 4,485.9932
2020-11-25 2019-12-31 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 85,168 -30,542 -26.40 10,463 74,635.71 0.0039
2020-02-13 2019-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 85,168 -30,542 10,463 3,935.6696
2020-11-20 2019-09-30 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 115,710 -5,638 -4.65 14 -99.90 0.0058
2019-11-05 2019-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 115,710 -5,638 14,374 5,775.2430
2019-08-14 2019-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 121,348 4,018 3.42 14,077 15.07 0.0057
2019-05-13 2019-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 117,330 -42,415 -26.55 12,233 -15.63 0.0052
2019-02-08 2018-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 159,745 -111,844 -41.18 14,500 -39.31 0.0070
2018-10-25 2018-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 271,589 -20,575 -7.04 23,891 -4.23 0.0098
2018-07-30 2018-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 292,164 -7,276 -2.43 24,945 1.43 0.0107
2018-05-04 2018-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 299,440 -44,145 -12.85 24,593 -21.77 0.0105
2018-02-14 2017-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 343,585 12,542 3.79 31,435 17.36 0.0132
2017-11-14 2017-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 331,043 5,710 1.76 26,784 5.62 0.0116
2017-08-14 2017-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 325,333 -15,425 -4.53 25,360 -4.31 0.0113
2017-05-12 2017-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 340,758 267 0.08 26,501 7.56 0.0124
2017-05-09 2016-12-31 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 340,491 -42,919 -11.19 24,638 -14.14 0.0120
2017-02-13 2016-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 340,491 -42,919 24,638 12,061.6758
2017-05-09 2016-09-30 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 383,410 22,568 6.25 28,694 -5.90 0.0140
2016-11-14 2016-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 383,410 22,568 28,694 13,982.1167
2017-05-09 2016-06-30 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 360,842 -38,893 -9.73 30,494 10.67 0.0154
2016-08-12 2016-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 360,842 -38,893 30,494 15,369.7869
2017-05-09 2016-03-31 13F/A-1 AMERICAN WTR WKS CO INC COM 030420103 399,735 -133,134 -24.98 27,554 -13.46 0.0143
2016-05-12 2016-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 399,735 -245,018 27,554 14,323.6011
2016-02-12 2015-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 532,869 -90,394 -14.50 31,839 -7.25 0.0170
2015-11-12 2015-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 623,263 192,343 44.64 34,329 63.82 0.0192
2015-08-13 2015-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 430,920 1,242 0.29 20,956 -10.03 0.0107
2015-05-13 2015-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 429,678 -165,367 -27.79 23,293 -26.56 0.0118
2015-02-13 2014-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 595,045 -49,708 -7.71 31,716 1.99 0.0161
2014-11-13 2014-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 644,753 37,204 6.12 31,097 3.51 0.0164
2014-08-13 2014-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 607,549 -131,490 -17.79 30,043 -10.46 0.0157
2014-05-13 2014-03-31 13F AMERICAN WTR WKS CO INC COM 030420103 739,039 3,949 0.54 33,552 8.01 0.0183
2014-02-12 2013-12-31 13F AMERICAN WTR WKS CO INC COM 030420103 735,090 97,610 15.31 31,065 18.05 0.0174
2013-11-08 2013-09-30 13F AMERICAN WTR WKS CO INC COM 030420103 637,480 -162,999 -20.36 26,315 -20.26 0.0163
2013-08-14 2013-06-30 13F AMERICAN WTR WKS CO INC COM 030420103 800,479 800,479 33,004 0.0223
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.