Ameren Corporation
US ˙ NYSE ˙ US0236081024

SecurityAEE / Ameren Corporation
InstitutionNatixis Advisors, L.p.
Latest Disclosed Ownership109,247 shares
Latest Disclosed Value $ 12,008
Natixis Advisors, L.p. reports 40.33% increase in ownership of AEE / Ameren Corporation

On May 13, 2026 - Natixis Advisors, L.p. filed a 13F-HR form disclosing ownership of 109,247 shares of Ameren Corporation (US:AEE) valued at $12,008,430 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 77,848 shares of Ameren Corporation. This represents a change in shares of 40.33% during the quarter. The current value of the position is $11,605,309 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)
2026-05-13 2026-03-31 13F AMEREN COM 023608102 109,247 31,399 40.33 12 71.43 0.0167
2026-02-10 2025-12-31 13F AMEREN COM 023608102 77,848 11,917 18.07 8 16.67 0.0110
2025-11-13 2025-09-30 13F AMEREN COM 023608102 65,931 4,012 6.48 7 20.00 0.0100
2025-08-13 2025-06-30 13F AMEREN CORP COM 023608102 61,919 1,653 2.74 6 -16.67 0.0094
2025-05-08 2025-03-31 13F AMEREN COM 023608102 60,266 4,303 7.69 6 50.00 0.0112
2025-02-10 2024-12-31 13F AMEREN COM 023608102 55,963 14,643 35.44 5 33.33 0.0093
2024-11-06 2024-09-30 13F AMEREN COM 023608102 41,320 5,016 13.82 4 50.00 0.0070
2024-08-01 2024-06-30 13F AMEREN COM 023608102 36,304 -1,741 -4.58 3 0.00 0.0056
2024-04-25 2024-03-31 13F AMEREN COM 023608102 38,045 -246,729 -86.64 3 -90.00 0.0065
2024-02-06 2023-12-31 13F AMEREN COM 023608102 284,774 49,864 21.23 21 17.65 0.0542
2023-11-13 2023-09-30 13F AMEREN COM 023608102 234,910 -1,339 -0.57 18 -10.53 0.0538
2023-08-15 2023-06-30 13F AMEREN COM 023608102 236,249 12,713 5.69 19 0.00 0.0596
2023-05-11 2023-03-31 13F AMEREN CORP COM 023608102 223,536 10,680 5.02 19 5.56 0.0665
2023-01-27 2022-12-31 13F AMEREN CORP COM 023608102 212,856 -8,483 -3.83 19 -99.90 0.0715
2022-11-14 2022-09-30 13F AMEREN CORP COM 023608102 221,339 20,861 10.41 17,829 -1.58 0.0754
2022-08-12 2022-06-30 13F AMEREN COM 023608102 200,478 -15,715 -7.27 18,116 -10.63 0.0797
2022-05-12 2022-03-31 13F AMEREN COM 023608102 216,193 16,546 8.29 20,271 14.07 0.0773
2022-02-08 2021-12-31 13F AMEREN COM 023608102 199,647 24,968 14.29 17,771 25.60 0.0679
2021-11-15 2021-09-30 13F AMEREN COM 023608102 174,679 21,358 13.93 14,149 15.30 0.0582
2021-08-12 2021-06-30 13F AMEREN COM 023608102 153,321 3,371 2.25 12,271 0.59 0.0573
2021-05-05 2021-03-31 13F AMEREN COM 023608102 149,950 22,744 17.88 12,199 22.85 0.0637
2021-02-12 2020-12-31 13F AMEREN COM 023608102 127,206 18,263 16.76 9,930 15.26 0.0572
2020-11-12 2020-09-30 13F AMEREN COM 023608102 108,943 -8,932 -7.58 8,615 3.87 0.0542
2020-08-11 2020-06-30 13F AMEREN COM 023608102 117,875 29,468 33.33 8,294 28.81 0.0550
2020-04-27 2020-03-31 13F AMEREN COM 023608102 88,407 -424 -0.48 6,439 -5.61 0.0525
2020-02-10 2019-12-31 13F AMEREN COM 023608102 88,831 2,612 3.03 6,822 -1.16 0.0481
2019-11-12 2019-09-30 13F AMEREN COM 023608102 86,219 9,092 11.79 6,902 19.14 0.0548
2019-08-12 2019-06-30 13F AMEREN COM 023608102 77,127 -3,673 -4.55 5,793 -2.52 0.0473
2019-05-15 2019-03-31 13F/A-1 AMEREN COM 023608102 80,800 -3,698 -4.38 5,943 7.82 0.0520
2019-05-15 2019-03-31 13F AMEREN COM 023608102 80,800 -3,698 5,943
2019-02-13 2018-12-31 13F/A-1 AMEREN COM 023608102 84,498 3,629 4.49 5,512 7.85 0.0544
2019-02-13 2018-12-31 13F AMEREN COM 023608102 84,498 3,629 5,512
2018-11-13 2018-09-30 13F AMEREN COM 023608102 80,869 -1,430 -1.74 5,111 2.08 0.0450
2018-08-14 2018-06-30 13F/A-1 AMEREN COM 023608102 82,299 54,086 191.71 5,007 213.33 0.0478
2018-08-14 2018-06-30 13F AMEREN COM 023608102 82,299 5,007
2018-05-10 2018-03-31 13F AMEREN COM 023608102 28,213 -444 -1.55 1,598 -5.44 0.0158
2018-02-14 2017-12-31 13F AMEREN COM 023608102 28,657 -6,628 -18.78 1,690 -17.16 0.0172
2017-11-14 2017-09-30 13F AMEREN COM 023608102 35,285 -2,622 -6.92 2,040 -1.54 0.0216
2017-07-27 2017-06-30 13F AMEREN COM 023608102 37,907 544 1.46 2,072 1.57 0.0224
2017-05-12 2017-03-31 13F AMEREN COM 023608102 37,363 13,603 57.25 2,040 63.72 0.0226
2017-02-07 2016-12-31 13F AMEREN COM 023608102 23,760 2,720 12.93 1,246 20.39 0.0150
2016-11-04 2016-09-30 13F AMEREN COM 023608102 21,040 3,085 17.18 1,035 7.59 0.0134
2016-08-01 2016-06-30 13F AMEREN COM 023608102 17,955 2,841 18.80 962 27.08 0.0133
2016-05-06 2016-03-31 13F AMEREN CORP COM COM 023608102 15,114 2,607 20.84 757 39.93 0.0113
2016-02-12 2015-12-31 13F AMEREN COM 023608102 12,507 731 6.21 541 8.63 0.0089
2015-11-12 2015-09-30 13F AMEREN COM 023608102 11,776 -795 -6.32 498 5.06 0.0086
2015-08-14 2015-06-30 13F AMEREN COM 023608102 12,571 2,223 21.48 474 8.47 0.0080
2015-05-15 2015-03-31 13F AMEREN COM 023608102 10,348 10,348 437 0.0077
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.