Ameren Corporation
MX ˙ BMV ˙ US0236081024
SecurityMX:AEE / Ameren Corporation
InstitutionNomura Holdings Inc
Latest Disclosed Ownership5,978 shares
Latest Disclosed Value $ 657,102
Nomura Holdings Inc reports 32.26% increase in ownership of AEE / Ameren Corporation

On May 15, 2026 - Nomura Holdings Inc filed a 13F-HR form disclosing ownership of 5,978 shares of Ameren Corporation (MX:AEE) valued at $657,102 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 4,520 shares of Ameren Corporation. This represents a change in shares of 32.26% 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)
2026-05-15 2026-03-31 13F AMEREN COM 023608102 5,978 1,458 32.26 657 45.68 0.0017
2026-02-17 2025-12-31 13F AMEREN COM 023608102 4,520 -5,690 -55.73 451 -57.65 0.0006
2025-11-14 2025-09-30 13F AMEREN COM 023608102 10,210 10,210 1,066 0.0017
2025-08-18 2025-06-30 13F/A-1 AMEREN COM 023608102 0 -8,510 -100.00 0 -100.00
2025-08-14 2025-06-30 13F AMEREN COM 023608102 0 0
2025-05-15 2025-03-31 13F AMEREN COM 023608102 8,510 -284 -3.23 854 9.07 0.0016
2025-02-14 2024-12-31 13F AMEREN COM 023608102 8,794 8,794 784 0.0011
2025-01-13 2024-09-30 13F/A-1 AMEREN COM 023608102 0 -5,660 -100.00 0 -100.00
2024-11-14 2024-09-30 13F AMEREN COM 023608102 0 0
2024-08-14 2024-06-30 13F AMEREN COM 023608102 5,660 5,660 402 0.0008
2024-05-15 2024-03-31 13F AMEREN COM 023608102 0 -5,304 -100.00 0 -100.00
2024-03-27 2023-12-31 13F/A-1 AMEREN COM 023608102 5,304 5,304 384 0.0010
2024-02-14 2023-12-31 13F AMEREN COM 023608102 5,304 5,304 384 0.0008
2022-02-14 2021-12-31 13F AMEREN CMN 023608102 0 -10,074 -100.00 0 -100.00
2021-11-15 2021-09-30 13F AMEREN CMN 023608102 10,074 10,074 812 0.0020
2021-05-17 2021-03-31 13F AMEREN CMN 023608102 0 -11,264 -100.00 0 -100.00 0.0000
2021-02-16 2020-12-31 13F AMEREN CMN 023608102 11,264 6,796 152.10 1 -100.00 0.0015
2020-11-12 2020-09-30 13F AMEREN CMN 023608102 4,468 -4,364 -49.41 354 -43.09 0.0008
2020-08-14 2020-06-30 13F AMEREN CMN 023608102 8,832 -12,468 -58.54 622 -63.35 0.0022
2019-11-14 2019-09-30 13F AMEREN CMN 023608102 21,300 -18,000 -45.80 1,697 -42.51 0.0065
2019-08-23 2019-06-30 13F/A-1 AMEREN CMN 023608102 39,300 39,300 2,952 0.0131
2019-08-14 2019-06-30 13F AMEREN CMN 023608102 39,300 39,300 2,952
2019-05-14 2019-03-31 13F AMEREN CMN 023608102 0 -104,880 -100.00 0 -100.00
2019-02-14 2018-12-31 13F AMEREN CMN 023608102 104,880 104,880 6,838 0.0254
2018-11-14 2018-09-30 13F AMEREN CMN 023608102 0 -480,207 -100.00 0 -100.00
2018-08-17 2018-06-30 13F/A-1 AMEREN CMN 023608102 480,207 110,582 29.92 29,221 40.07 0.0930
2018-08-14 2018-06-30 13F AMEREN CMN 023608102 480,207 110,582 22,722
2018-05-14 2018-03-31 13F/A-1 AMEREN CMN 023608102 369,625 338,053 1,070.74 20,861 1,020.96 0.0359
2018-05-14 2018-03-31 13F AMEREN CMN 023608102 401,197 22,722
2018-02-14 2017-12-31 13F AMEREN CMN 023608102 31,572 -17,537 -35.71 1,861 -34.54 0.0033
2017-11-14 2017-09-30 13F AMEREN CMN 023608102 49,109 13,055 36.21 2,843 44.24 0.0060
2017-08-15 2017-06-30 13F AMEREN CMN 023608102 36,054 28,620 384.99 1,971 385.47 0.0048
2017-05-18 2017-03-31 13F/A-1 AMEREN CMN 023608102 7,434 -17,585 -70.29 406 -69.01 0.0011
2017-05-15 2017-03-31 13F AMEREN CMN 023608102 7,434 406
2017-02-13 2016-12-31 13F AMEREN CMN 023608102 25,019 20,084 406.97 1,310 439.09 0.0033
2016-11-14 2016-09-30 13F AMEREN CMN 023608102 4,935 4,935 0.00 243 0.0007
2016-05-16 2016-03-31 13F AMEREN CMN 023608102 0 -6,200 -100.00 0 -100.00
2016-02-12 2015-12-31 13F AMEREN CMN 023608102 6,200 -16,240 -72.37 268 -71.40 0.0007
2015-11-16 2015-09-30 13F AMEREN CMN 023608102 22,440 -49,059 -68.61 937 -65.37 0.0034
2015-08-14 2015-06-30 13F AMEREN CMN 023608102 71,499 63,857 835.61 2,706 745.63 0.0076
2015-05-15 2015-03-31 13F AMEREN CMN 023608102 7,642 -46,636 -85.92 320 -87.09 0.0010
2015-02-17 2014-12-31 13F AMEREN CMN 023608102 54,278 54,278 0.00 2,479 0.0066
2014-11-14 2014-09-30 13F AMEREN CMN 023608102 0 -48,222 -100.00 0 -100.00
2014-08-13 2014-06-30 13F AMEREN CMN 023608102 48,222 -21,559 -30.90 1,963 -31.48 0.0006
2014-05-14 2014-03-31 13F AMEREN CMN 023608102 69,781 -12,371 -15.06 2,865 -3.57 0.0009
2014-02-14 2013-12-31 13F AMEREN CMN 023608102 82,152 42,093 105.08 2,971 112.82 0.0136
2013-11-14 2013-09-30 13F AMEREN CMN 023608102 40,059 23,216 137.84 1,396 140.28 0.0084
2013-08-15 2013-06-30 13F AMEREN CMN 023608102 16,843 16,843 581 0.0047
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.