Ameren Corporation
MX ˙ BMV ˙ US0236081024
SecurityMX:AEE / Ameren Corporation
InstitutionBnp Paribas Arbitrage, Sa
Latest Disclosed Ownership353,186 shares
Latest Disclosed Value $ 38,822,205
Bnp Paribas Arbitrage, Sa reports 9.28% decrease in ownership of AEE / Ameren Corporation

On May 12, 2026 - Bnp Paribas Arbitrage, Sa filed a 13F-HR form disclosing ownership of 353,186 shares of Ameren Corporation (MX:AEE) valued at $38,822,205 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 389,309 shares of Ameren Corporation. This represents a change in shares of -9.28% 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 Ameren Equity 023608102 353,186 -36,123 -9.28 38,822 -0.14 0.0019
2026-02-10 2025-12-31 13F Ameren Equity 023608102 389,309 209,364 116.35 38,876 106.99 0.0176
2025-11-13 2025-09-30 13F Ameren Equity 023608102 179,945 16,371 10.01 18,783 19.56 0.0100
2025-08-14 2025-06-30 13F Ameren Equity 023608102 163,574 -224,224 -57.82 15,710 -59.65 0.0090
2025-05-14 2025-03-31 13F Ameren Equity 023608102 387,798 -109,709 -22.05 38,935 -12.21 0.0229
2025-02-14 2024-12-31 13F Ameren Equity 023608102 497,507 112,054 29.07 44,348 31.55 0.0249
2024-11-13 2024-09-30 13F Ameren Equity 023608102 385,453 -104,299 -21.30 33,712 -3.20 0.0227
2024-08-13 2024-06-30 13F Ameren Equity 023608102 489,752 144,318 41.78 34,826 36.32 0.0284
2024-05-01 2024-03-31 13F Ameren Equity 023608102 345,434 80,599 30.43 25,548 33.35 0.0224
2024-02-14 2023-12-31 13F/A-2 Ameren Equity 023608102 264,835 120,849 83.93 19,158 77.82 0.0218
2024-02-07 2023-12-31 13F/A-1 Ameren Equity 023608102 264,835 120,849 19,158 0.0027
2024-02-07 2023-12-31 13F Ameren Equity 023608102 264,835 19,158
2023-11-14 2023-09-30 13F Ameren Equity 023608102 143,986 -155,763 -51.96 10,774 -55.99 0.0138
2023-08-09 2023-06-30 13F Ameren Equity 023608102 299,749 132,901 79.65 24,481 69.85 0.0306
2023-05-12 2023-03-31 13F AMEREN EQUITY 023608102 166,848 -61,068 -26.79 14,414 -28.88 0.0202
2023-02-14 2022-12-31 13F Ameren Equity 023608102 227,916 120,726 112.63 20,266 134.72 0.0311
2022-11-16 2022-09-30 13F/A-1 Ameren Equity 023608102 107,190 -114,162 -51.57 8,634 -56.83 0.0138
2022-11-15 2022-09-30 13F Ameren Equity 023608102 107,190 -114,162 8,634 0.0021
2022-08-12 2022-06-30 13F Ameren Equity 023608102 221,352 25,759 13.17 20,001 9.07 0.0312
2022-05-18 2022-03-31 13F/A-1 Ameren Equity 023608102 195,593 -52,632 -21.20 18,339 -17.00 0.0247
2022-02-09 2021-12-31 13F AMEREN EQUITY 023608102 248,225 -10,295 -3.98 22,095 5.51 0.0315
2021-11-16 2021-09-30 13F/A-1 AMEREN EQUITY 023608102 258,520 -122,627 -32.17 20,940 -31.36 0.0297
2021-11-12 2021-09-30 13F AMEREN EQUITY 023608102 275,250 -105,897 21,767 0.0000
2021-08-10 2021-06-30 13F AMEREN EQUITY 023608102 381,147 260,613 216.22 30,507 211.11 0.0404
2021-05-07 2021-03-31 13F AMEREN EQUITY 023608102 120,534 1,447 1.22 9,807 5.50 0.0143
2021-02-10 2020-12-31 13F AMEREN EQUITY 023608102 119,087 -156,163 -56.73 9,296 -57.30 0.0173
2020-10-30 2020-09-30 13F AMEREN EQUITY 023608102 275,250 219,988 398.08 21,767 459.83 0.0311
2020-08-06 2020-06-30 13F AMEREN EQUITY 023608102 55,262 -77,015 -58.22 3,888 -59.64 0.0069
2020-05-13 2020-03-31 13F AMEREN EQUITY 023608102 132,277 -29,242 -18.10 9,634 -22.34 0.0198
2020-02-12 2019-12-31 13F AMEREN EQUITY 023608102 161,519 52,019 47.51 12,405 41.52 0.0226
2019-11-07 2019-09-30 13F AMEREN EQUITY 023608102 109,500 -97,639 -47.14 8,765 -43.66 0.0156
2019-07-30 2019-06-30 13F AMEREN EQUITY 023608102 207,139 110,670 114.72 15,558 119.28 0.0310
2019-04-25 2019-03-31 13F AMEREN EQUITY 023608102 96,469 -19,061 -16.50 7,095 -5.85 0.0153
2019-02-12 2018-12-31 13F AMEREN EQUITY 023608102 115,530 -139,625 -54.72 7,536 -53.28 0.0178
2018-11-07 2018-09-30 13F AMEREN EQUITY 023608102 255,155 -29,196 -10.27 16,131 -6.77 0.0238
2018-07-25 2018-06-30 13F AMEREN EQUITY 023608102 284,351 92,581 48.28 17,303 59.33 0.0288
2018-05-11 2018-03-31 13F AMEREN EQUITY 023608102 191,770 -43,994 -18.66 10,860 -21.92 0.0203
2018-03-05 2017-12-31 13F/A-1 AMEREN EQUITY 023608102 235,764 -95,442 -28.82 13,908 -27.40 0.0247
2018-02-01 2017-12-31 13F AMEREN EQUITY 023608102 235,764 -95,442 13,908
2017-11-03 2017-09-30 13F AMEREN STOCK 023608102 331,206 45,023 15.73 19,157 22.44 0.0468
2017-08-03 2017-06-30 13F AMEREN STOCK 023608102 286,183 3,890 1.38 15,646 1.52 0.0472
2017-05-03 2017-03-31 13F AMEREN STOCK 023608102 282,293 191,156 209.75 15,410 222.32 0.0407
2017-02-14 2016-12-31 13F AMEREN STOCK 023608102 91,137 41,640 84.13 4,781 96.43 0.0224
2016-10-05 2016-09-30 13F * AMEREN CORP COM STOCK 023608102 49,497 -72,794 -59.53 2,434 -62.85 0.0100
2016-07-06 2016-06-30 13F * AMEREN CORP COM STOCK 023608102 122,291 -78,203 -39.01 6,552 -34.77 0.0296
2016-04-22 2016-03-31 13F * AMEREN CORP COM STOCK 023608102 200,494 26,551 15.26 10,045 33.58 0.0425
2016-04-19 2015-12-31 13F/A-1 * AMEREN CORP COM STOCK 023608102 173,943 39,295 29.18 7,520 32.12 0.0366
2016-02-10 2015-12-31 13F * AMEREN CORP COM STOCK 023608102 173,943 7,520
2015-11-13 2015-09-30 13F * AMEREN CORP COM STOCK 023608102 134,648 -4,483 -3.22 5,692 8.57 0.0143
2015-08-14 2015-06-30 13F AMEREN CORP COM STOCK 023608102 139,131 48,295 53.17 5,242 36.76 0.0146
2015-05-15 2015-03-31 13F * AMEREN CORP COM STOCK 023608102 90,836 -52,725 -36.73 3,833 -42.12 0.0106
2015-03-10 2014-12-31 13F/A-1 * AMEREN CORP COM STOCK 023608102 143,561 -6,281 -4.19 6,622 15.31 0.0235
2015-02-11 2014-12-31 13F * AMEREN CORP COM STOCK 023608102 143,561 6,622
2014-11-12 2014-09-30 13F * AMEREN CORP COM STOCK 023608102 149,842 36,354 32.03 5,743 23.80 0.0050
2014-08-14 2014-06-30 13F/A-1 * AMEREN CORP COM STOCK 023608102 113,488 -32,686 -22.36 4,639 -23.17 0.0044
2014-08-14 2014-06-30 13F AMEREN CORP COM STOCK 023608102 113,488 4,639
2014-05-13 2014-03-31 13F AMEREN STOCK 023608102 146,174 29,980 25.80 6,038 43.73 0.0047
2014-04-02 2013-12-31 13F/A-1 AMEREN STOCK 023608102 116,194 -23,074 -16.57 4,202 -13.42 0.0031
2014-02-12 2013-12-31 13F AMEREN STOCK 023608102 116,194 4,202
2013-11-13 2013-09-30 13F AMEREN STOCK 023608102 139,268 139,268 4,852 0.0035
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.