Ameren Corporation
MX ˙ BMV ˙ US0236081024
SecurityMX:AEE / Ameren Corporation
InstitutionStandard Life Aberdeen plc
Latest Disclosed Ownership157,896 shares
Latest Disclosed Value $ 17,355,929
Standard Life Aberdeen plc reports 17.63% increase in ownership of AEE / Ameren Corporation

On April 29, 2026 - Standard Life Aberdeen plc filed a 13F-HR form disclosing ownership of 157,896 shares of Ameren Corporation (MX:AEE) valued at $17,355,929 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 16, 2026 disclosing 134,230 shares of Ameren Corporation. This represents a change in shares of 17.63% 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)
2026-04-29 2026-03-31 13F AMEREN COM 023608102 157,896 23,666 17.63 17,356 29.48 0.0152
2026-01-16 2025-12-31 13F AMEREN COM 023608102 134,230 1,133 0.85 13,404 -2.74 0.0208
2025-11-07 2025-09-30 13F AMEREN COM 023608102 133,097 -7,543 -5.36 13,782 2.04 0.0218
2025-07-24 2025-06-30 13F AMEREN COM 023608102 140,640 11,658 9.04 13,507 4.34 0.0230
2025-05-13 2025-03-31 13F AMEREN COM 023608102 128,982 3,324 2.65 12,946 16.07 0.0252
2025-01-24 2024-12-31 13F AMEREN COM 023608102 125,658 12,747 11.29 11,153 13.38 0.0209
2024-10-25 2024-09-30 13F AMEREN COM 023608102 112,911 17,277 18.07 9,838 44.66 0.0180
2024-08-09 2024-06-30 13F AMEREN COM 023608102 95,634 35,894 60.08 6,801 53.92 0.0130
2024-05-09 2024-03-31 13F AMEREN COM 023608102 59,740 -1,588 -2.59 4,418 -0.41 0.0087
2024-01-31 2023-12-31 13F AMEREN COM 023608102 61,328 16 0.03 4,436 -3.29 0.0096
2023-11-07 2023-09-30 13F AMEREN COM 023608102 61,312 -1,396 -2.23 4,588 -10.43 0.0117
2024-06-20 2023-06-30 13F/A-1 AMEREN COM 023608102 62,708 -759 -1.20 5,121 -6.59 0.0119
2023-08-04 2023-06-30 13F AMEREN COM 023608102 62,708 -759 5,121 0.0119
2024-06-20 2023-03-31 13F/A-1 AMEREN COM 023608102 63,467 -192 -0.30 5,483 -3.14 0.0137
2023-04-28 2023-03-31 13F AMEREN COM 023608102 63,467 -192 5,483 0.0137
2024-06-20 2022-12-31 13F/A-1 AMEREN COM 023608102 63,659 1,861 3.01 5,661 13.70 0.0154
2023-02-10 2022-12-31 13F AMEREN COM 023608102 63,659 1,861 5,661 0.0154
2022-11-10 2022-09-30 13F AMEREN COM 023608102 61,798 418 0.68 4,978 -10.13 0.0148
2022-08-05 2022-06-30 13F AMEREN COM 023608102 61,380 -2,188 -3.44 5,539 -7.67 0.0174
2022-05-04 2022-03-31 13F AMEREN COM 023608102 63,568 -34,688 -35.30 5,999 -31.40 0.0153
2022-02-10 2021-12-31 13F/A-1 AMEREN COM 023608102 98,256 -4,748 -4.61 8,745 4.58 0.0192
2022-02-08 2021-12-31 13F AMEREN COM 023608102 98,256 -4,748 8,745 0.0063
2021-11-15 2021-09-30 13F AMEREN COM 023608102 103,004 -6,604 -6.03 8,362 -4.70 0.0188
2021-08-10 2021-06-30 13F AMEREN COM 023608102 109,608 -3,000 -2.66 8,774 -4.25 0.0192
2021-05-06 2021-03-31 13F AMEREN COM 023608102 112,608 14,619 14.92 9,163 19.79 0.0208
2021-02-10 2020-12-31 13F AMEREN COM 023608102 97,989 3,518 3.72 7,649 2.40 0.0186
2020-10-21 2020-09-30 13F AMEREN COM 023608102 94,471 -11,124 -10.53 7,470 0.55 0.0199
2020-08-10 2020-06-30 13F AMEREN COM 023608102 105,595 -6,407 -5.72 7,429 -8.99 0.0201
2020-05-13 2020-03-31 13F AMEREN COM 023608102 112,002 -4,333 -3.72 8,163 -8.64 0.0259
2020-02-18 2019-12-31 13F AMEREN COM 023608102 116,335 -2,983 -2.50 8,935 -6.46 0.0216
2019-11-13 2019-09-30 13F AMEREN COM 023608102 119,318 -1,710 -1.41 9,552 5.07 0.0238
2019-08-13 2019-06-30 13F AMEREN COM 023608102 121,028 -2,072 -1.68 9,091 0.41 0.0202
2019-05-14 2019-03-31 13F AMEREN COM 023608102 123,100 25,487 26.11 9,054 42.02 0.0196
2019-02-12 2018-12-31 13F AMEREN COM 023608102 97,613 -1,761 -1.77 6,375 1.48 0.0151
2018-11-20 2018-09-30 13F/A-1 AMEREN COM 023608102 99,374 7,124 7.72 6,282 11.90 0.0117
2018-11-13 2018-09-30 13F AMEREN COM 023608102 99,374 7,124 6,282
2018-08-09 2018-06-30 13F AMEREN COM 023608102 92,250 12,901 16.26 5,614 24.92 0.0108
2018-05-15 2018-03-31 13F AMEREN COM 023608102 79,349 2,345 3.05 4,494 -1.08 0.0089
2018-02-12 2017-12-31 13F AMEREN COM 023608102 77,004 -5,758 -6.96 4,543 -5.12 0.0087
2017-11-14 2017-09-30 13F AMEREN COM 023608102 82,762 82,762 4,788 0.0087
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.