Ameren Corporation
US ˙ NYSE ˙ US0236081024

SecurityAEE / Ameren Corporation
InstitutionNational Pension Service
Latest Disclosed Ownership390,234 shares
Latest Disclosed Value $ 42,894,521
National Pension Service reports 5.08% increase in ownership of AEE / Ameren Corporation

On May 12, 2026 - National Pension Service filed a 13F-HR form disclosing ownership of 390,234 shares of Ameren Corporation (US:AEE) valued at $42,894,521 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 371,365 shares of Ameren Corporation. This represents a change in shares of 5.08% during the quarter. The current value of the position is $42,640,869 USD.

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 AMEREN COM 023608102 390,234 18,869 5.08 42,895 15.67 0.0326
2026-02-10 2025-12-31 13F AMEREN AMEREN CORP 023608102 371,365 36,078 10.76 37,085 5.96 0.0275
2025-11-04 2025-09-30 13F AMEREN COM 023608102 335,287 2,397 0.72 34,997 9.47 0.0272
2025-08-08 2025-06-30 13F AMEREN COM 023608102 332,890 2,914 0.88 31,971 -3.50 0.0276
2025-05-13 2025-03-31 13F AMEREN COM 023608102 329,976 -4,120 -1.23 33,130 11.24 0.0318
2025-02-05 2024-12-31 13F AMEREN COM 023608102 334,096 -47,604 -12.47 29,781 -10.79 0.0282
2024-10-30 2024-09-30 13F AMERENCORP COM 023608102 381,700 -16,620 -4.17 33,383 17.86 0.0322
2024-08-13 2024-06-30 13F AMEREN COM 023608102 398,320 10,476 2.70 28,325 -1.26 0.0325
2024-05-14 2024-03-31 13F AMEREN COM 023608102 387,844 25,566 7.06 28,685 9.45 0.0344
2024-02-07 2023-12-31 13F AMEREN COM 023608102 362,278 0 0.00 26,207 -5.87 0.0365
2023-11-15 2023-09-30 13F AMEREN COM 023608102 362,278 12,866 3.68 27,841 -1.61 0.0446
2023-08-16 2023-06-30 13F AMEREN COM 023608102 349,412 19,325 5.85 28,299 -0.83 0.0456
2023-05-12 2023-03-31 13F AMEREN COM 023608102 330,087 4,894 1.50 28,536 -1.31 0.0520
2023-02-24 2022-12-31 13F/A-1 AMEREN COM 023608102 325,193 1,176 0.36 28,916 8.19 0.0569
2023-02-21 2022-12-31 13F AMEREN COM 023608102 325,193 1,176 29 0.0569
2023-02-24 2022-09-30 13F/A-1 AMEREN COM 023608102 324,017 -3,845 -1.17 26,728 -9.78 0.0558
2022-11-18 2022-09-30 13F AMEREN COM 023608102 324,017 -3,845 26,728 0.0558
2022-08-17 2022-06-30 13F AMEREN COM 023608102 327,862 0 0.00 29,626 -3.62 0.0611
2022-05-13 2022-03-31 13F AMEREN COM 023608102 327,862 -33,535 -9.28 30,740 -4.44 0.0561
2022-02-15 2021-12-31 13F AMEREN COM 023608102 361,397 -6,960 -1.89 32,168 7.81 0.0561
2021-11-18 2021-09-30 13F AMEREN COM 023608102 368,357 -3,672 -0.99 29,837 0.20 0.0568
2021-08-17 2021-06-30 13F AMEREN COM 023608102 372,029 12 0.00 29,777 -1.62 0.0566
2021-05-14 2021-03-31 13F AMEREN COM 023608102 372,017 2,718 0.74 30,267 5.00 0.0633
2021-02-19 2020-12-31 13F AMEREN COM 023608102 369,299 14,223 4.01 28,827 3.53 0.0657
2020-11-13 2020-09-30 13F AMEREN COM 023608102 355,076 0 0.00 27,845 11.46 0.0731
2020-08-11 2020-06-30 13F AMEREN COM 023608102 355,076 20,076 5.99 24,983 2.40 0.0714
2020-05-27 2020-03-31 13F AMEREN COM 023608102 335,000 0 0.00 24,398 -5.17 0.0826
2020-02-21 2019-12-31 13F AMEREN COM 023608102 335,000 -3,209 -0.95 25,728 -4.97 0.0706
2019-11-15 2019-09-30 13F AMEREN COM 023608102 338,209 17,417 5.43 27,074 12.36 0.0857
2019-08-14 2019-06-30 13F AMEREN COM 023608102 320,792 23,852 8.03 24,095 10.33 0.0805
2019-05-15 2019-03-31 13F AMEREN COM 023608102 296,940 12,249 4.30 21,840 11.13 0.0840
2019-02-15 2018-12-31 13F AMEREN COM 023608102 284,691 12,768 4.70 19,652 14.32 0.0811
2018-11-15 2018-09-30 13F AMEREN COM 023608102 271,923 0 0.00 17,191 3.91 0.0700
2018-08-14 2018-06-30 13F AMEREN COM 023608102 271,923 1,456 0.54 16,544 8.01 0.0749
2018-04-13 2018-03-31 13F AMEREN COM 023608102 270,467 17,762 7.03 15,317 2.75 0.0759
2018-01-17 2017-12-31 13F AMEREN COM 023608102 252,705 5,018 2.03 14,907 3.13 0.0744
2017-10-16 2017-09-30 13F Ameren COM 023608102 247,687 9,576 4.02 14,455 10.98 0.0795
2017-07-13 2017-06-30 13F AMEREN COM 023608102 238,111 21,087 9.72 13,025 9.74 0.0776
2017-04-11 2017-03-31 13F AMEREN COM 023608102 217,024 7,972 3.81 11,869 8.22 0.0795
2017-01-18 2016-12-31 13F AMEREN COM 023608102 209,052 13,678 7.00 10,967 14.14 0.0750
2016-10-14 2016-09-30 13F AMEREN COM 023608102 195,374 16,856 9.44 9,608 0.45 0.0770
2016-08-11 2016-06-30 13F AMEREN COM 023608102 178,518 8,966 5.29 9,565 12.60 0.0849
2016-05-16 2016-03-31 13F AMEREN COM 023608102 169,552 7,205 4.44 8,495 21.05 0.0851
2016-02-12 2015-12-31 13F AMEREN COM 023608102 162,347 10,764 7.10 7,018 9.54 0.0737
2015-10-15 2015-09-30 13F AMEREN COM 023608102 151,583 29,592 24.26 6,407 39.40 0.0810
2015-07-15 2015-06-30 13F AMEREN COM 023608102 121,991 18,892 18.32 4,596 5.63 0.0596
2015-04-15 2015-03-31 13F AMEREN COM 023608102 103,099 15,172 17.26 4,351 7.27 0.0629
2015-01-13 2014-12-31 13F AMEREN COM 023608102 87,927 -13,030 -12.91 4,056 4.81 0.0685
2014-11-07 2014-09-30 13F AMEREN COM 023608102 100,957 100,957 3,870 0.0614
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.