Ameren Corporation
DE ˙ DB ˙ US0236081024
90,78 € ↓ -0,42 (-0,46%)
2026-06-04
DEL PRIS
SecurityDE:AE4 / Ameren Corporation
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership5,377,156 shares
Latest Disclosed Value $ 591,056,349
Janus Henderson Group Plc reports 11.47% increase in ownership of AE4 / Ameren Corporation

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 5,377,156 shares of Ameren Corporation (DE:AE4) valued at $516,206,976 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 4,823,992 shares of Ameren Corporation. This represents a change in shares of 11.47% during the quarter. The current value of the position is $488,138,222 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)
2026-05-18 2026-03-31 13F/A-1 AMEREN COM 023608102 5,377,156 553,164 11.47 591,056 22.70 0.2822
2026-05-15 2026-03-31 13F AMEREN COM 023608102 5,362,587 538,595 589,455 0.1094
2026-02-17 2025-12-31 13F AMEREN COM 023608102 4,823,992 99,671 2.11 481,724 -2.31 0.2157
2025-11-14 2025-09-30 13F AMEREN COM 023608102 4,724,321 40,354 0.86 493,124 9.62 0.2251
2025-08-14 2025-06-30 13F AMEREN COM 023608102 4,683,967 25,545 0.55 449,847 -3.14 0.2205
2025-05-15 2025-03-31 13F AMEREN COM 023608102 4,658,422 56,973 1.24 464,445 13.23 0.2546
2025-02-14 2024-12-31 13F AMEREN COM 023608102 4,601,449 39,455 0.86 410,174 2.80 0.2085
2024-11-14 2024-09-30 13F AMEREN COM 023608102 4,561,994 39,300 0.87 398,992 24.06 0.2042
2024-08-14 2024-06-30 13F AMEREN COM 023608102 4,522,694 11,949 0.26 321,610 -3.60 0.1722
2024-05-15 2024-03-31 13F AMEREN COM 023608102 4,510,745 -492,530 -9.84 333,613 -7.83 0.1820
2024-02-14 2023-12-31 13F AMEREN COM 023608102 5,003,275 1,593,274 46.72 361,936 41.84 0.2159
2023-11-14 2023-09-30 13F AMEREN COM 023608102 3,410,001 3,374,188 9,421.68 255,171 8,623.79 0.1671
2023-08-14 2023-06-30 13F AMEREN COM 023608102 35,813 -1,562 -4.18 2,925 -9.39 0.0018
2023-05-15 2023-03-31 13F AMEREN COM 023608102 37,375 151 0.41 3,228 -2.45 0.0021
2023-02-14 2022-12-31 13F AMEREN COM 023608102 37,224 13,041 53.93 3,310 69.78 0.0024
2023-01-13 2022-09-30 13F/A-1 AMEREN COM 023608102 24,183 -3,690 -13.24 1,949 -22.63 0.0015
2022-11-14 2022-09-30 13F AMEREN COM 023608102 24,183 -3,690 1,949 0.0005
2022-08-15 2022-06-30 13F AMEREN COM 023608102 27,873 -63,486 -69.49 2,519 -70.59 0.0017
2022-05-16 2022-03-31 13F AMEREN COM 023608102 91,359 -33,113 -26.60 8,565 -22.69 0.0041
2022-02-14 2021-12-31 13F AMEREN COM 023608102 124,472 -459,782 -78.70 11,079 -76.59 0.0046
2021-11-16 2021-09-30 13F AMEREN COM 023608102 584,254 220,120 60.45 47,325 62.38 0.0207
2021-08-16 2021-06-30 13F AMEREN COM 023608102 364,134 275,053 308.77 29,145 302.11 0.0125
2021-05-17 2021-03-31 13F AMEREN COM 023608102 89,081 -41,881 -31.98 7,248 -29.09 0.0033
2021-02-16 2020-12-31 13F AMEREN COM 023608102 130,962 -62,639 -32.35 10,221 -33.24 0.0047
2020-11-16 2020-09-30 13F AMEREN COM 023608102 193,601 -118,265 -37.92 15,310 -30.23 0.0080
2020-08-14 2020-06-30 13F AMEREN COM 023608102 311,866 -166,908 -34.86 21,943 -37.08 0.0123
2020-05-14 2020-03-31 13F AMEREN COM 023608102 478,774 -774,048 -61.78 34,872 -63.76 0.0240
2020-02-18 2019-12-31 13F AMEREN COM 023608102 1,252,822 -880,436 -41.27 96,216 -43.66 0.0493
2019-11-14 2019-09-30 13F AMEREN COM 023608102 2,133,258 -506,002 -19.17 170,767 -13.86 0.0925
2019-07-31 2019-06-30 13F AMEREN COM 023608102 2,639,260 -254,020 -8.78 198,234 -6.84 0.1079
2019-04-30 2019-03-31 13F AMEREN COM 023608102 2,893,280 895,229 44.81 212,800 63.28 0.1179
2019-02-06 2018-12-31 13F AMEREN COM 023608102 1,998,051 825,072 70.34 130,332 75.75 0.0831
2018-11-09 2018-09-30 13F AMEREN COM 023608102 1,172,979 -335,349 -22.23 74,156 -19.20 0.0396
2018-08-10 2018-06-30 13F AMEREN COM 023608102 1,508,328 -1,077,365 -41.67 91,782 -37.32 0.0523
2018-05-14 2018-03-31 13F AMEREN COM 023608102 2,585,693 339,751 15.13 146,428 10.52 0.0863
2018-03-12 2017-12-31 13F/A-1 AMEREN COM 023608102 2,245,942 1,346 0.06 132,488 2.05 0.0816
2018-02-09 2017-12-31 13F AMEREN COM 023608102 2,245,942 1,346 132,488
2017-11-14 2017-09-30 13F AMEREN COM 023608102 2,244,596 293,658 15.05 129,828 21.72 0.0832
2017-08-17 2017-06-30 13F/A-1 AMEREN COM 023608102 1,950,938 1,922,219 6,693.20 106,658 6,702.17 0.0727
2017-08-14 2017-06-30 13F AMEREN COM 023608102 1,950,938 1,922,219 106,658
2017-05-03 2017-03-31 13F AMEREN COM 023608102 28,719 700 2.50 1,568 6.67 0.0110
2017-01-30 2016-12-31 13F AMEREN COM 023608102 28,019 -518 -1.82 1,470 4.78 0.0108
2016-10-24 2016-09-30 13F AMEREN COM 023608102 28,537 -6,020 -17.42 1,403 -24.20 0.0103
2016-07-29 2016-06-30 13F AMEREN COM 023608102 34,557 3,150 10.03 1,851 17.67 0.0154
2016-05-12 2016-03-31 13F AMEREN COM 023608102 31,407 0 0.00 1,573 15.83 0.0128
2016-02-03 2015-12-31 13F AMEREN COM 023608102 31,407 -3,088 -8.95 1,358 -6.79 0.0109
2015-11-16 2015-09-30 13F AMEREN COM 023608102 34,495 0 0.00 1,457 12.08 0.0128
2015-08-17 2015-06-30 13F AMEREN COM 023608102 34,495 0 0.00 1,300 -10.71 0.0102
2015-06-02 2015-03-31 13F/A-1 AMEREN COM 023608102 34,495 0 0.00 1,456 -8.49 0.0112
2015-05-15 2015-03-31 13F AMEREN COM 023608102 34,495 1,456
2015-02-12 2014-12-31 13F AMEREN COM 023608102 34,495 0 0.00 1,591 20.26 0.0115
2014-11-12 2014-09-30 13F AMEREN COM 023608102 34,495 0 0.00 1,323 -6.17 0.0124
2014-08-13 2014-06-30 13F AMEREN COM 023608102 34,495 0 0.00 1,410 -0.77 0.0132
2014-05-08 2014-03-31 13F AMEREN COM 023608102 34,495 5,300 18.15 1,421 34.56 0.0138
2014-01-14 2013-12-31 13F AMEREN COM 023608102 29,195 0 0.00 1,056 3.73 0.0107
2013-11-12 2013-09-30 13F AMEREN COM 023608102 29,195 -2,579 -8.12 1,018 -5.65 0.0112
2013-08-15 2013-06-30 13F AMEREN COM 023608102 31,774 31,774 1,079 0.0126
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.