아메렌 코퍼레이션
MX ˙ BMV ˙ US0236081024
SecurityMX:AEE / Ameren Corporation
InstitutionTrexquant Investment LP
Latest Disclosed Ownership140,732 shares
Latest Disclosed Value $ 15,469,261
Trexquant Investment LP reports 745.08% increase in ownership of AEE / Ameren Corporation

On May 15, 2026 - Trexquant Investment LP filed a 13F-HR form disclosing ownership of 140,732 shares of Ameren Corporation (MX:AEE) valued at $15,469,261 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 16,653 shares of Ameren Corporation. This represents a change in shares of 745.08% 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 140,732 124,079 745.08 15,469 830.75 0.1112
2026-02-17 2025-12-31 13F AMEREN COM 023608102 16,653 -132,962 -88.87 1,663 -89.36 0.0148
2025-11-14 2025-09-30 13F AMEREN COM 023608102 149,615 135,547 963.51 15,617 1,055.88 0.1608
2025-08-12 2025-06-30 13F AMEREN COM 023608102 14,068 -51,494 -78.54 1,351 -79.47 0.0152
2025-05-14 2025-03-31 13F AMEREN COM 023608102 65,562 65,562 6,582 0.0766
2025-02-12 2024-12-31 13F AMEREN COM 023608102 0 -180,628 -100.00 0 -100.00
2024-11-12 2024-09-30 13F AMEREN COM 023608102 180,628 56,964 46.06 15,798 79.65 0.2000
2024-08-13 2024-06-30 13F AMEREN COM 023608102 123,664 44,188 55.60 8,794 49.59 0.1342
2024-05-14 2024-03-31 13F AMEREN COM 023608102 79,476 65,768 479.78 5,878 493.14 0.1172
2024-02-09 2023-12-31 13F AMEREN COM 023608102 13,708 -2,377 -14.78 992 -17.62 0.0223
2023-11-13 2023-09-30 13F AMEREN COM 023608102 16,085 16,085 1,204 0.0302
2023-08-11 2023-06-30 13F AMEREN COM 023608102 0 -56,921 -100.00 0 -100.00
2023-05-15 2023-03-31 13F AMEREN COM 023608102 56,921 -25,860 -31.24 4,917 -33.19 0.1351
2023-02-13 2022-12-31 13F AMEREN COM 023608102 82,781 17,431 26.67 7,361 39.82 0.2087
2022-11-14 2022-09-30 13F AMEREN COM 023608102 65,350 40,799 166.18 5,264 137.33 0.1851
2022-08-11 2022-06-30 13F AMEREN COM 023608102 24,551 -32,113 -56.67 2,218 -58.25 0.0994
2022-05-13 2022-03-31 13F AMEREN COM 023608102 56,664 56,664 5,313 0.2495
2022-02-11 2021-12-31 13F AMEREN COM 023608102 0 -8,051 -100.00 0 -100.00
2021-11-12 2021-09-30 13F AMEREN COM 023608102 8,051 -15,511 -65.83 652 -65.43 0.0518
2021-08-12 2021-06-30 13F AMEREN COM 023608102 23,562 23,562 1,886 0.1591
2021-02-11 2020-12-31 13F AMEREN COM 023608102 0 -14,458 -100.00 0 -100.00
2020-11-06 2020-09-30 13F AMEREN COM 023608102 14,458 9,882 215.95 1,143 254.97 0.0735
2020-08-07 2020-06-30 13F AMEREN COM 023608102 4,576 -19,040 -80.62 322 -81.28 0.0224
2020-05-08 2020-03-31 13F AMEREN COM 023608102 23,616 23,616 416.08 1,720 434.16 0.1248
2020-02-12 2019-12-31 13F AMEREN COM 023608102 0 -33,054 -100.00 0 -100.00
2020-02-18 2019-09-30 13F/A-1 AMEREN COM 023608102 33,054 27,443 489.09 2,646 528.50 0.2285
2019-11-08 2019-09-30 13F AMEREN COM 023608102 33,054 27,443 2,646 228,528.1955
2019-08-09 2019-06-30 13F AMEREN COM 023608102 5,611 5,611 -83.02 421 -84.09 0.0379
2019-05-13 2019-03-31 13F AMEREN COM 023608102 0 -7,891 -100.00 0 -100.00
2019-02-13 2018-12-31 13F AMEREN COM 023608102 7,891 7,891 515 0.0322
2018-08-07 2018-06-30 13F AMEREN COM 023608102 0 -83,865 -100.00 0 -100.00
2018-05-03 2018-03-31 13F AMEREN COM 023608102 83,865 56,105 202.11 4,749 189.93 0.3310
2018-02-08 2017-12-31 13F AMEREN COM 023608102 27,760 27,760 -66.90 1,638 -65.51 0.1798
2017-08-01 2017-06-30 13F AMEREN COM 023608102 0 -6,100 -100.00 0 -100.00
2017-05-08 2017-03-31 13F AMEREN COM 023608102 6,100 6,100 333 0.0427
2016-05-11 2016-03-31 13F AMEREN COM 023608102 0 -82,450 -100.00 0 -100.00
2016-02-10 2015-12-31 13F AMEREN COM 023608102 82,450 82,450 0.00 3,564 0.3139
2015-11-02 2015-09-30 13F AMEREN COM 023608102 0 -9,300 -100.00 0 -100.00
2015-08-12 2015-06-30 13F AMEREN COM 023608102 9,300 9,300 350 0.0393
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.