Ameren Corporation
DE ˙ DB ˙ US0236081024
90,78 € ↓ -0,42 (-0,46%)
2026-06-04
DEL PRIS
SecurityDE:AE4 / Ameren Corporation
InstitutionRenaissance Technologies Llc
ManagerJames Simons
Latest Disclosed Ownership288,200 shares
Latest Disclosed Value $ 31,678,944
Renaissance Technologies Llc reports 19.68% increase in ownership of AE4 / Ameren Corporation

On May 14, 2026 - Renaissance Technologies Llc filed a 13F-HR form disclosing ownership of 288,200 shares of Ameren Corporation (DE:AE4) valued at $27,667,200 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 240,800 shares of Ameren Corporation. This represents a change in shares of 19.68% during the quarter. The current value of the position is $26,162,796 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)
2026-05-14 2026-03-31 13F AMEREN COM 023608102 288,200 47,400 19.68 31,679 31.74 0.0496
2026-02-12 2025-12-31 13F AMEREN COM 023608102 240,800 240,800 24,046 0.0373
2024-11-13 2024-09-30 13F AMEREN COM 023608102 0 -64,900 -100.00 0 -100.00
2024-08-09 2024-06-30 13F AMEREN COM 023608102 64,900 -358,400 -84.67 4,615 14,787.10 0.0078
2024-05-13 2024-03-31 13F AMEREN COM 023608102 423,300 -17,000 -3.86 31 0.00 0.0492
2024-02-13 2023-12-31 13F AMEREN COM 023608102 440,300 440,300 32 0.0493
2023-08-11 2023-06-30 13F AMEREN COM 023608102 0 -147,501 -100.00 0 -100.00
2023-05-12 2023-03-31 13F AMEREN COM 023608102 147,501 -41,599 -22.00 13 -25.00 0.0169
2023-02-13 2022-12-31 13F AMEREN COM 023608102 189,100 11,882 6.70 17 -99.89 0.0230
2022-11-14 2022-09-30 13F AMEREN COM 023608102 177,218 -21,082 -10.63 14,275 -20.33 0.0202
2022-08-12 2022-06-30 13F AMEREN COM 023608102 198,300 122,300 160.92 17,918 151.45 0.0212
2022-05-13 2022-03-31 13F AMEREN COM 023608102 76,000 -2,000 -2.56 7,126 2.64 0.0084
2022-02-11 2021-12-31 13F AMEREN COM 023608102 78,000 49,600 174.65 6,943 201.87 0.0086
2021-11-12 2021-09-30 13F AMEREN COM 023608102 28,400 28,400 2,300 0.0030
2021-05-13 2021-03-31 13F AMEREN COM 023608102 0 -501,729 -100.00 0 -100.00
2021-02-10 2020-12-31 13F AMEREN COM 023608102 501,729 -1,195,227 -70.43 39,165 -70.81 0.0425
2020-11-13 2020-09-30 13F AMEREN COM 023608102 1,696,956 -1,577,700 -48.18 134,195 -41.76 0.1340
2020-08-13 2020-06-30 13F AMEREN COM 023608102 3,274,656 -2,188,501 -40.06 230,405 -42.09 0.1989
2020-05-14 2020-03-31 13F AMEREN COM 023608102 5,463,157 891,949 19.51 397,882 13.33 0.3864
2020-02-13 2019-12-31 13F AMEREN COM 023608102 4,571,208 -1,034,392 -18.45 351,069 -21.76 0.2698
2019-11-13 2019-09-30 13F AMEREN COM 023608102 5,605,600 1,149,600 25.80 448,728 34.07 0.3798
2019-08-12 2019-06-30 13F AMEREN COM 023608102 4,456,000 -35,800 -0.80 334,690 1.31 0.2947
2019-05-14 2019-03-31 13F AMEREN COM 023608102 4,491,800 -364,400 -7.50 330,372 4.29 0.3003
2019-02-12 2018-12-31 13F AMEREN COM 023608102 4,856,200 214,100 4.61 316,770 7.94 0.3468
2018-11-13 2018-09-30 13F AMEREN COM 023608102 4,642,100 541,253 13.20 293,474 17.61 0.3017
2018-08-13 2018-06-30 13F/A-1 AMEREN COM 023608102 4,100,847 282,247 7.39 249,537 15.39 0.2720
2018-08-13 2018-06-30 13F AMEREN COM 023608102 3,818,600 216,247
2018-05-14 2018-03-31 13F AMEREN COM 023608102 3,818,600 638,200 20.07 216,247 15.26 0.2365
2018-02-13 2017-12-31 13F AMEREN COM 023608102 3,180,400 650,200 25.70 187,612 28.20 0.2068
2017-11-13 2017-09-30 13F AMEREN COM 023608102 2,530,200 348,100 15.95 146,347 22.68 0.1722
2017-08-11 2017-06-30 13F AMEREN COM 023608102 2,182,100 177,700 8.87 119,295 9.02 0.1522
2017-05-12 2017-03-31 13F AMEREN COM 023608102 2,004,400 276,800 16.02 109,420 20.73 0.1529
2017-02-13 2016-12-31 13F AMEREN COM 023608102 1,727,600 453,400 35.58 90,630 44.63 0.1434
2016-11-14 2016-09-30 13F AMEREN COM 023608102 1,274,200 577,200 82.81 62,665 67.80 0.1108
2016-08-12 2016-06-30 13F AMEREN COM 023608102 697,000 -688,600 -49.70 37,345 -46.20 0.0711
2016-05-13 2016-03-31 13F AMEREN COM 023608102 1,385,600 334,400 31.81 69,419 52.76 0.1320
2016-02-11 2015-12-31 13F AMEREN COM 023608102 1,051,200 202,100 23.80 45,443 26.61 0.0990
2015-11-12 2015-09-30 13F AMEREN COM 023608102 849,100 252,200 42.25 35,891 59.58 0.0856
2015-08-14 2015-06-30 13F AMEREN COM 023608102 596,900 9,200 1.57 22,491 -9.31 0.0512
2015-05-13 2015-03-31 13F AMEREN COM 023608102 587,700 -278,400 -32.14 24,801 -37.92 0.0528
2015-02-13 2014-12-31 13F AMEREN COM 023608102 866,100 558,400 181.48 39,953 238.76 0.0965
2014-11-12 2014-09-30 13F AMEREN COM 023608102 307,700 -221,900 -41.90 11,794 -45.52 0.0323
2014-08-13 2014-06-30 13F AMEREN COM 023608102 529,600 -175,600 -24.90 21,650 -25.48 0.0505
2014-05-14 2014-03-31 13F AMEREN COM 023608102 705,200 239,300 51.36 29,054 72.46 0.0697
2014-02-14 2013-12-31 13F AMEREN COM 023608102 465,900 -762,100 -62.06 16,847 -60.62 0.0403
2013-11-13 2013-09-30 13F AMEREN COM 023608102 1,228,000 -980,600 -44.40 42,784 -43.75 0.1038
2013-08-12 2013-06-30 13F AMEREN COM 023608102 2,208,600 2,208,600 76,064 0.1994
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.