아메렌 코퍼레이션
US ˙ NYSE ˙ US0236081024

SecurityAEE / Ameren Corporation
InstitutionMarshall Wace, Llp
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Marshall Wace, Llp closes position in AEE / Ameren Corporation

On May 14, 2026 - Marshall Wace, Llp filed a 13F-HR form disclosing ownership of 0 shares of Ameren Corporation (US:AEE) valued at $0 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 697,164 shares of Ameren Corporation. The current value of the position is $0 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 COMMON STOCK 023608102 0 -100.00 0
2026-02-13 2025-12-31 13F AMEREN COMMON STOCK 023608102 697,164 69,619
2025-11-13 2025-09-30 13F AMEREN COMMON STOCK 023608102 779,330 -74,613 -8.74 81,346 -0.81 0.0825
2025-08-13 2025-06-30 13F AMEREN COMMON STOCK 023608102 853,943 154,925 22.16 82,013 16.86 0.0924
2025-05-15 2025-03-31 13F AMEREN COMMON STOCK 023608102 699,018 699,018 70,181 0.0891
2025-02-13 2024-12-31 13F AMEREN COMMON STOCK 023608102 0 -9,100 -100.00 0 -100.00
2024-11-14 2024-09-30 13F AMEREN COMMON STOCK 023608102 9,100 9,100 796 0.0010
2023-02-14 2022-12-31 13F AMEREN COMMON STOCK 023608102 0 -24,925 -100.00 0 -100.00
2022-11-14 2022-09-30 13F AMEREN COMMON STOCK 023608102 24,925 -69,907 -73.72 2,008 -76.56 0.0044
2022-08-15 2022-06-30 13F AMEREN COMMON STOCK 023608102 94,832 72,480 324.27 8,567 308.93 0.0176
2022-05-16 2022-03-31 13F AMEREN COMMON STOCK 023608102 22,352 -46,174 -67.38 2,095 -65.66 0.0040
2022-02-14 2021-12-31 13F AMEREN COMMON STOCK 023608102 68,526 68,526 6,100 0.0113
2021-11-15 2021-09-30 13F AMEREN COMMON STOCK 023608102 0 -3,321 -100.00 0 -100.00
2021-08-13 2021-06-30 13F AMEREN COMMON STOCK 023608102 3,321 3,321 266 0.0013
2021-02-16 2020-12-31 13F AMEREN COMMON STOCK 023608102 0 -15,297 -100.00 0 -100.00
2020-11-16 2020-09-30 13F AMEREN COMMON STOCK 023608102 15,297 -1,027 -6.29 1,210 5.31 0.0077
2020-08-13 2020-06-30 13F AMEREN COMMON STOCK 023608102 16,324 16,324 6.71 1,149 -5.04 0.0080
2020-05-15 2020-03-31 13F AMEREN COMMON STOCK 023608102 0 -32,065 -100.00 0 -100.00
2020-02-14 2019-12-31 13F AMEREN COMMON STOCK 023608102 32,065 -90,737 -73.89 2,463 -74.94 0.0169
2019-11-14 2019-09-30 13F AMEREN COMMON STOCK 023608102 122,802 122,802 282.98 9,830 299.11 0.0773
2019-08-14 2019-06-30 13F AMEREN COMMON STOCK 023608102 0 -50,165 -100.00 0 -100.00
2019-05-29 2019-03-31 13F/A-1 AMEREN COMMON STOCK 023608102 50,165 50,165 3,690 0.0347
2019-05-14 2019-03-31 13F AMEREN COMMON STOCK 023608102 50,165 50,165 3,690
2018-05-15 2018-03-31 13F AMEREN COMMON STOCK 023608102 0 -11,868 -100.00 0 -100.00
2018-03-29 2017-12-31 13F/A-1 AMEREN COMMON STOCK 023608102 11,868 11,868 700 0.0294
2018-02-14 2017-12-31 13F AMEREN COMMON STOCK 023608102 11,868 11,868 700
2017-05-12 2017-03-31 13F AMEREN COMMON STOCK 023608102 0 -10,760 -100.00 0 -100.00
2017-02-10 2016-12-31 13F AMEREN COMMON STOCK 023608102 10,760 10,760 564 0.0037
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.