Ameren Corporation
US ˙ NYSE ˙ US0236081024

SecurityAEE / Ameren Corporation
InstitutionFmr Llc
Latest Disclosed Ownership5,016,194 shares
Latest Disclosed Value $ 551,379,934
Fmr Llc reports 1.68% increase in ownership of AEE / Ameren Corporation

On May 15, 2026 - Fmr Llc filed a 13F-HR form disclosing ownership of 5,016,194 shares of Ameren Corporation (US:AEE) valued at $551,380,044 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 4,933,452 shares of Ameren Corporation. This represents a change in shares of 1.68% during the quarter. The current value of the position is $532,870,289 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)
2026-05-15 2026-03-31 13F AMEREN COM 023608102 5,016,194 82,742 1.68 551,380 11.92 0.0058
2026-02-17 2025-12-31 13F AMEREN COM 023608102 4,933,452 92,511 1.91 492,654 -2.50 0.0251
2025-11-13 2025-09-30 13F AMEREN COM 023608102 4,840,941 -278,627 -5.44 505,297 2.77 0.0263
2025-08-14 2025-06-30 13F AMEREN COM 023608102 5,119,568 -447,897 -8.04 491,683 -12.04 0.0277
2025-05-12 2025-03-31 13F AMEREN COM 023608102 5,567,465 396,756 7.67 558,974 21.27 0.0357
2025-02-13 2024-12-31 13F AMEREN COM 023608102 5,170,709 2,539,129 96.49 460,917 100.26 0.0275
2024-11-13 2024-09-30 13F AMEREN COM 023608102 2,631,580 984,879 59.81 230,158 96.55 0.0140
2024-08-13 2024-06-30 13F AMEREN COM 023608102 1,646,701 345,668 26.57 117,097 21.69 0.0075
2024-05-13 2024-03-31 13F AMEREN COM 023608102 1,301,033 -23,386 -1.77 96,224 0.43 0.0065
2024-02-13 2023-12-31 13F AMEREN COM 023608102 1,324,419 -39,296 -2.88 95,808 -6.11 0.0074
2023-11-13 2023-09-30 13F AMEREN COM 023608102 1,363,715 -11,458 -0.83 102,047 -9.14 0.0088
2023-08-11 2023-06-30 13F AMEREN COM 023608102 1,375,173 -176,815 -11.39 112,310 -16.23 0.0094
2023-08-11 2023-03-31 13F/A-1 AMEREN COM 023608102 1,551,988 95,133 6.53 134,076 3.50 0.0123
2023-05-11 2023-03-31 13F AMEREN COM 023608102 1,551,988 95,133 134,076 0.0024
2023-02-13 2022-12-31 13F AMEREN COM 023608102 1,456,855 -21,289 -1.44 129,544 8.80 0.0129
2022-11-10 2022-09-30 13F AMEREN COM 023608102 1,478,144 -40,920 -2.69 119,065 -13.26 0.0124
2022-08-12 2022-06-30 13F AMEREN COM 023608102 1,519,064 -19,416 -1.26 137,263 -4.84 0.0137
2022-05-13 2022-03-31 13F AMEREN COM 023608102 1,538,480 50,697 3.41 144,248 8.93 0.0115
2022-02-14 2021-12-31 13F AMEREN COM 023608102 1,487,783 -4,006 -0.27 132,428 9.59 0.0098
2022-02-14 2021-09-30 13F/A-1 AMEREN COM 023608102 1,491,789 -6,289 -0.42 120,834 0.77 0.0096
2021-11-15 2021-09-30 13F AMEREN COM 023608102 1,491,789 -6,289 120,834 0.0096
2021-08-13 2021-06-30 13F AMEREN COM 023608102 1,498,078 -65,806 -4.21 119,905 -5.76 0.0094
2021-05-14 2021-03-31 13F AMEREN COM 023608102 1,563,884 -59,780 -3.68 127,237 0.39 0.0109
2021-02-08 2020-12-31 13F AMEREN COM 023608102 1,623,664 -742,037 -31.37 126,743 -32.25 0.0113
2020-11-13 2020-09-30 13F AMEREN COM 023608102 2,365,701 -1,078,323 -31.31 187,079 -22.80 0.0189
2020-08-24 2020-06-30 13F/A-1 AMEREN COM 023608102 3,444,024 160,224 4.88 242,321 1.32 0.0266
2020-08-13 2020-06-30 13F AMEREN COM 023608102 3,444,024 160,224 242,321 5,953.1178
2020-05-14 2020-03-31 13F AMEREN COM 023608102 3,283,800 1,006,770 44.21 239,159 36.76 0.0331
2020-02-07 2019-12-31 13F AMEREN COM 023608102 2,277,030 -77,311 -3.28 174,876 -7.21 0.0193
2019-11-13 2019-09-30 13F AMEREN COM 023608102 2,354,341 102,041 4.53 188,464 11.40 0.0226
2019-08-13 2019-06-30 13F AMEREN COM 023608102 2,252,300 -2,038,591 -47.51 169,171 -46.40 0.0198
2019-05-13 2019-03-31 13F AMEREN COM 023608102 4,290,891 518,279 13.74 315,597 28.25 0.0378
2019-02-13 2018-12-31 13F AMEREN COM 023608102 3,772,612 52,129 1.40 246,087 4.62 0.0337
2018-11-09 2018-09-30 13F AMEREN COM 023608102 3,720,483 2,754,278 285.06 235,209 300.06 0.0265
2018-08-10 2018-06-30 13F AMEREN COM 023608102 966,205 94,229 10.81 58,794 19.06 0.0069
2018-05-14 2018-03-31 13F AMEREN COM 023608102 871,976 46,567 5.64 49,380 1.42 0.0059
2018-02-12 2017-12-31 13F AMEREN COM 023608102 825,409 589,552 249.96 48,690 256.91 0.0057
2017-11-13 2017-09-30 13F AMEREN COM 023608102 235,857 23,545 11.09 13,642 17.52 0.0016
2017-08-29 2017-06-30 13F/A-1 AMEREN COM 023608102 212,312 919 0.43 11,608 0.58 0.0014
2017-08-11 2017-06-30 13F AMEREN COM 023608102 212,312 919 11,608
2017-05-11 2017-03-31 13F AMEREN COM 023608102 211,393 80,249 61.19 11,541 67.75 0.0015
2017-02-10 2016-12-31 13F AMEREN COM 023608102 131,144 12,752 10.77 6,880 18.17 0.0009
2016-11-14 2016-09-30 13F AMEREN COM 023608102 118,392 -395,901 -76.98 5,822 -78.87 0.0008
2016-08-11 2016-06-30 13F AMEREN COM 023608102 514,293 269,558 110.14 27,556 124.75 0.0038
2016-05-16 2016-03-31 13F AMEREN COM 023608102 244,735 -32,563 -11.74 12,261 2.29 0.0017
2016-02-12 2015-12-31 13F AMEREN COM 023608102 277,298 166,013 149.18 11,987 154.83 0.0016
2015-11-10 2015-09-30 13F AMEREN COM 023608102 111,285 1,662 1.52 4,704 13.90 0.0007
2015-08-25 2015-06-30 13F/A-1 AMEREN COM 023608102 109,623 -31,817 -22.50 4,130 -30.81 0.0005
2015-08-13 2015-06-30 13F AMEREN COM 023608102 109,623 4,130
2015-05-14 2015-03-31 13F AMEREN COM 023608102 141,440 -6,323 -4.28 5,969 -12.43 0.0008
2015-02-17 2014-12-31 13F AMEREN COM 023608102 147,763 -284,551 -65.82 6,816 -58.87 0.0009
2014-11-14 2014-09-30 13F AMEREN COM 023608102 432,314 -112,317 -20.62 16,571 -25.57 0.0022
2014-08-14 2014-06-30 13F AMEREN COM 023608102 544,631 -2,175,272 -79.98 22,265 -80.13 0.0030
2014-05-15 2014-03-31 13F AMEREN COM 023608102 2,719,903 -1,659,320 -37.89 112,060 -29.23 0.0156
2014-02-13 2013-12-31 13F AMEREN COM 023608102 4,379,223 1,464,122 50.23 158,352 55.92 0.0224
2013-11-14 2013-09-30 13F AMEREN COM 023608102 2,915,101 132,852 4.77 101,562 5.99 0.0156
2013-09-24 2013-06-30 13F/A-1 AMEREN COM 023608102 2,782,249 2,782,249 95,821 0.0157
2013-08-14 2013-06-30 13F AMEREN COM 023608102 2,782,249 95,821 0.0157
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.