Ameren Corporation
US ˙ NYSE ˙ US0236081024

SecurityAEE / Ameren Corporation
InstitutionCitigroup Inc
Latest Disclosed Ownership325,833 shares
Latest Disclosed Value $ 35,815,564
Citigroup Inc reports 15.16% decrease in ownership of AEE / Ameren Corporation

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 325,833 shares of Ameren Corporation (US:AEE) valued at $35,815,563 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 384,068 shares of Ameren Corporation. This represents a change in shares of -15.16% during the quarter. The current value of the position is $34,613,240 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)
2026-05-11 2026-03-31 13F AMEREN COM 023608102 325,833 -58,235 -15.16 35,816 -6.62 0.0077
2026-02-13 2025-12-31 13F AMEREN COM 023608102 384,068 76,085 24.70 38,353 19.31 0.0169
2025-11-10 2025-09-30 13F AMEREN COM 023608102 307,983 11,220 3.78 32,147 12.79 0.0143
2025-08-11 2025-06-30 13F AMEREN COM 023608102 296,763 -47,147 -13.71 28,501 -17.46 0.0140
2025-05-12 2025-03-31 13F AMEREN COM 023608102 343,910 25,313 7.95 34,529 21.58 0.0176
2025-02-12 2024-12-31 13F AMEREN COM 023608102 318,597 94,184 41.97 28,400 44.69 0.0168
2024-11-12 2024-09-30 13F AMEREN COM 023608102 224,413 -9,823 -4.19 19,627 17.84 0.0114
2024-08-12 2024-06-30 13F AMEREN COM 023608102 234,236 147,047 168.65 16,657 158.31 0.0107
2024-05-10 2024-03-31 13F AMEREN COM 023608102 87,189 -56,887 -39.48 6,448 -38.13 0.0042
2024-02-09 2023-12-31 13F AMEREN COM 023608102 144,076 -4,632 -3.11 10,422 -6.34 0.0073
2023-12-06 2023-09-30 13F/A-1 AMEREN COM 023608102 148,708 -15,889 -9.65 11,128 -17.22 0.0083
2023-11-09 2023-09-30 13F AMEREN COM 023608102 148,708 -15,889 11,128 0.0033
2023-08-10 2023-06-30 13F AMEREN COM 023608102 164,597 -78,268 -32.23 13,443 -35.93 0.0088
2023-05-11 2023-03-31 13F AMEREN COM 023608102 242,865 22,023 9.97 20,981 6.84 0.0147
2023-02-09 2022-12-31 13F AMEREN COM 023608102 220,842 -4,417 -1.96 19,637 8.22 0.0156
2022-11-10 2022-09-30 13F AMEREN COM 023608102 225,259 3,792 1.71 18,145 -9.33 0.0130
2022-08-10 2022-06-30 13F AMEREN COM 023608102 221,467 7,768 3.64 20,012 -0.12 0.0149
2022-05-12 2022-03-31 13F AMEREN COM 023608102 213,699 -45,780 -17.64 20,037 -13.24 0.0122
2022-02-10 2021-12-31 13F AMEREN COM 023608102 259,479 -245,937 -48.66 23,096 -43.59 0.0124
2021-11-10 2021-09-30 13F AMEREN COM 023608102 505,416 145,877 40.57 40,940 42.26 0.0242
2021-08-10 2021-06-30 13F AMEREN COM 023608102 359,539 179,980 100.23 28,778 97.00 0.0173
2021-05-13 2021-03-31 13F AMEREN COM 023608102 179,559 -5,701 -3.08 14,608 1.01 0.0094
2021-02-11 2020-12-31 13F AMEREN COM 023608102 185,260 7,983 4.50 14,462 3.15 0.0085
2020-11-12 2020-09-30 13F AMEREN COM 023608102 177,277 47,046 36.13 14,020 53.01 0.0091
2020-08-12 2020-06-30 13F AMEREN COM 023608102 130,231 15,783 13.79 9,163 9.95 0.0072
2020-05-12 2020-03-31 13F AMEREN COM 023608102 114,448 -78,970 -40.83 8,334 -43.89 0.0075
2020-02-12 2019-12-31 13F AMEREN COM 023608102 193,418 12,725 7.04 14,854 2.70 0.0108
2019-11-08 2019-09-30 13F AMEREN COM 023608102 180,693 -111,142 -38.08 14,464 -34.01 0.0115
2019-08-12 2019-06-30 13F AMEREN COM 023608102 291,835 81,489 38.74 21,920 41.68 0.0177
2019-05-13 2019-03-31 13F AMEREN COM 023608102 210,346 74,390 54.72 15,471 74.46 0.0149
2019-02-12 2018-12-31 13F AMEREN COM 023608102 135,956 112,947 490.88 8,868 509.90 0.0090
2018-11-13 2018-09-30 13F AMEREN COM 023608102 23,009 -12,653 -35.48 1,454 -33.03 0.0013
2018-08-10 2018-06-30 13F AMEREN COM 023608102 35,662 14,458 68.19 2,171 80.77 0.0020
2018-05-11 2018-03-31 13F AMEREN COM 023608102 21,204 -135,415 -86.46 1,201 -87.00 0.0010
2018-02-12 2017-12-31 13F AMEREN COM 023608102 156,619 138,048 743.35 9,239 760.24 0.0074
2017-11-13 2017-09-30 13F AMEREN COM 023608102 18,571 893 5.05 1,074 11.07 0.0009
2017-08-11 2017-06-30 13F AMEREN COM 023608102 17,678 -156,059 -89.82 967 -89.80 0.0009
2017-05-12 2017-03-31 13F AMEREN COM 023608102 173,737 155,468 850.99 9,485 891.12 0.0085
2017-02-10 2016-12-31 13F AMEREN COM 023608102 18,269 -27,995 -60.51 957 -57.93 0.0009
2016-11-10 2016-09-30 13F AMEREN COM 023608102 46,264 -224,471 -82.91 2,275 -84.32 0.0021
2016-08-12 2016-06-30 13F AMEREN COM 023608102 270,735 194,112 253.33 14,506 277.96 0.0148
2016-05-13 2016-03-31 13F AMEREN COM 023608102 76,623 69,875 1,035.49 3,838 1,218.90 0.0043
2016-02-12 2015-12-31 13F AMEREN COM 023608102 6,748 147 2.23 291 4.68 0.0003
2015-11-13 2015-09-30 13F AMEREN COM 023608102 6,601 894 15.66 278 29.30 0.0003
2015-08-13 2015-06-30 13F AMEREN COM 023608102 5,707 2,788 95.51 215 74.80 0.0002
2015-05-14 2015-03-31 13F AMEREN COM 023608102 2,919 -25,037 -89.56 123 -90.47 0.0001
2015-02-17 2014-12-31 13F AMEREN COM 023608102 27,956 26,177 1,471.44 1,290 1,769.57 0.0012
2014-11-14 2014-09-30 13F AMEREN COM 023608102 1,779 -4,832 -73.09 69 -74.44 0.0001
2014-08-14 2014-06-30 13F AMEREN COM 023608102 6,611 -6,898 -51.06 270 -51.44 0.0003
2014-05-15 2014-03-31 13F AMEREN COM 023608102 13,509 -3,973 -22.73 556 -12.16 0.0006
2014-02-14 2013-12-31 13F AMEREN COM 023608102 17,482 -78,705 -81.82 633 -81.12 0.0006
2013-11-14 2013-09-30 13F AMEREN COM 023608102 96,187 -1,091,620 -91.90 3,352 -91.81 0.0031
2013-08-14 2013-06-30 13F AMEREN COM 023608102 1,187,807 1,187,807 40,908 0.0403
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.