아메렌 코퍼레이션
MX ˙ BMV ˙ US0236081024
SecurityMX:AEE / Ameren Corporation
InstitutionRhumbline Advisers
Latest Disclosed Ownership459,576 shares
Latest Disclosed Value $ 50,516,499
Rhumbline Advisers reports 1.10% decrease in ownership of AEE / Ameren Corporation

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 459,576 shares of Ameren Corporation (MX:AEE) valued at $50,516,499 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 464,685 shares of Ameren Corporation. This represents a change in shares of -1.10% 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)
2026-05-12 2026-03-31 13F AMEREN CORP COM COM 023608102 459,576 -5,109 -1.10 50,516 8.86 0.0432
2026-02-13 2025-12-31 13F AMEREN CORP COM COM 023608102 464,685 -7,183 -1.52 46,403 -5.79 0.0375
2025-11-06 2025-09-30 13F AMEREN CORP COM COM 023608102 471,868 4,336 0.93 49,253 9.69 0.0396
2025-08-12 2025-06-30 13F AMEREN CORP COM COM 023608102 467,532 6,209 1.35 44,902 -3.06 0.0385
2025-05-29 2025-03-31 13F/A-1 AMEREN CORP COM COM 023608102 461,323 33,489 7.83 46,317 21.45 0.0433
2025-04-08 2025-03-31 13F AMEREN CORP COM COM 023608102 461,323 33,489 46,317 0.0433
2025-05-29 2024-12-31 13F/A-1 AMEREN CORP COM COM 023608102 427,834 -2,280 -0.53 38,137 1.38 0.0341
2025-01-30 2024-12-31 13F AMEREN CORP COM COM 023608102 427,834 -2,280 38,137 0.0341
2024-11-12 2024-09-30 13F AMEREN CORP COM COM 023608102 430,114 -32,065 -6.94 37,618 14.46 0.0339
2024-08-01 2024-06-30 13F AMEREN CORP COM COM 023608102 462,179 -75 -0.02 32,865 -3.87 0.0309
2024-05-09 2024-03-31 13F AMEREN CORP COM COM 023608102 462,254 28,263 6.51 34,188 8.90 0.0328
2024-02-08 2023-12-31 13F AMEREN CORP COM COM 023608102 433,991 -4,693 -1.07 31,395 -4.36 0.0329
2023-11-09 2023-09-30 13F AMEREN CORP COM COM 023608102 438,684 -2,525 -0.57 32,827 -8.90 0.0381
2023-08-08 2023-06-30 13F AMEREN CORP COM COM 023608102 441,209 -1,003 -0.23 36,034 94,723.68 0.0404
2023-05-11 2023-03-31 13F AMEREN CORP COM COM 023608102 442,212 2,438 0.55 38 -99.90 0.0471
2023-02-14 2022-12-31 13F AMEREN CORP COM COM 023608102 439,774 14,528 3.42 39,105 14.16 0.0526
2022-11-10 2022-09-30 13F AMEREN CORP COM COM 023608102 425,246 17,746 4.35 34,254 -6.97 0.0510
2022-08-11 2022-06-30 13F AMEREN CORP COM COM 023608102 407,500 45,937 12.71 36,822 8.62 0.0537
2022-05-12 2022-03-31 13F AMEREN CORP COM COM 023608102 361,563 9,911 2.82 33,900 8.30 0.0436
2022-02-10 2021-12-31 13F AMEREN CORP COM COM 023608102 351,652 8,473 2.47 31,301 12.61 0.0384
2021-11-12 2021-09-30 13F AMEREN CORP COM COM 023608102 343,179 -28,971 -7.78 27,797 -6.68 0.0376
2021-08-05 2021-06-30 13F AMEREN CORP COM COM 023608102 372,150 -28,082 -7.02 29,787 -8.53 0.0391
2021-05-06 2021-03-31 13F AMEREN CORP COM COM 023608102 400,232 -33,148 -7.65 32,563 -3.75 0.0442
2021-02-10 2020-12-31 13F AMEREN CORP COM COM 023608102 433,380 -50,092 -10.36 33,830 -11.52 0.0467
2020-11-12 2020-09-30 13F AMEREN CORP COM COM 023608102 483,472 -10,809 -2.19 38,233 9.93 0.0599
2020-08-13 2020-06-30 13F AMEREN CORP COM COM 023608102 494,281 -37,728 -7.09 34,778 -10.24 0.0581
2020-05-06 2020-03-31 13F AMEREN CORP COM COM 023608102 532,009 19,562 3.82 38,746 -1.55 0.0812
2020-02-05 2019-12-31 13F AMEREN CORP COM COM 023608102 512,447 23,392 4.78 39,356 0.53 0.0658
2019-10-23 2019-09-30 13F AMEREN CORP COM COM 023608102 489,055 6,881 1.43 39,149 8.10 0.0715
2019-08-14 2019-06-30 13F AMEREN CORP COM COM 023608102 482,174 26,940 5.92 36,216 8.17 0.0680
2019-05-01 2019-03-31 13F AMEREN CORP COM COM 023608102 455,234 -45,621 -9.11 33,482 2.48 0.0648
2019-01-31 2018-12-31 13F AMEREN CORP COM COM 023608102 500,855 23,011 4.82 32,671 8.15 0.0711
2018-11-07 2018-09-30 13F AMEREN CORP COM COM 023608102 477,844 -2,119 -0.44 30,209 3.43 0.0583
2018-08-06 2018-06-30 13F AMEREN CORP COM COM 023608102 479,963 -54 -0.01 29,206 7.44 0.0589
2018-05-02 2018-03-31 13F AMEREN CORP COM COM 023608102 480,017 6,565 1.39 27,183 -2.67 0.0568
2018-02-09 2017-12-31 13F AMEREN CORP COM COM 023608102 473,452 6,747 1.45 27,929 3.46 0.0567
2017-11-06 2017-09-30 13F AMEREN CORP COM COM 023608102 466,705 15,967 3.54 26,994 9.54 0.0587
2017-08-02 2017-06-30 13F AMEREN CORP COM COM 023608102 450,738 35 0.01 24,642 0.15 0.0562
2017-05-02 2017-03-31 13F AMEREN CORP COM COM 023608102 450,703 11,239 2.56 24,604 6.72 0.0575
2017-01-27 2016-12-31 13F AMEREN CORP COM COM 023608102 439,464 65,132 17.40 23,054 25.23 0.0584
2016-11-08 2016-09-30 13F AMEREN CORP COM COM 023608102 374,332 14,886 4.14 18,410 -4.41 0.0507
2016-08-11 2016-06-30 13F AMEREN CORP COM COM 023608102 359,446 20,670 6.10 19,259 13.47 0.0571
2016-05-02 2016-03-31 13F AMEREN CORPORATION COMMON STOC COM 023608102 338,776 8,460 2.56 16,973 18.86 0.0527
2016-02-03 2015-12-31 13F AMEREN CORPORATION COMMON STOC COM 023608102 330,316 -283 -0.09 14,280 2.19 0.0460
2015-11-04 2015-09-30 13F AMEREN CORPORATION COMMON STOC COM 023608102 330,599 4,061 1.24 13,974 13.57 0.0475
2015-08-04 2015-06-30 13F AMEREN CORPORATION COMMON STOC COM 023608102 326,538 8,747 2.75 12,304 -8.25 0.0392
2015-05-12 2015-03-31 13F AMEREN CORPORATION COMMON STOC COM 023608102 317,791 -2,019 -0.63 13,411 -9.10 0.0387
2015-02-06 2014-12-31 13F AMEREN CORPORATION COMMON STOC COM 023608102 319,810 -2,690 -0.83 14,753 19.35 0.0429
2014-11-12 2014-09-30 13F AMEREN CORPORATION COMMON STOC COM 023608102 322,500 -6,583 -2.00 12,361 -8.12 0.0371
2014-08-06 2014-06-30 13F AMEREN CORPORATION COMMON STOC COM 023608102 329,083 -8,580 -2.54 13,453 -3.30 0.0395
2014-05-06 2014-03-31 13F AMEREN CORPORATION COMMON STOC COM 023608102 337,663 -4,490 -1.31 13,912 12.45 0.0413
2014-02-03 2013-12-31 13F AMEREN CORPORATION COMMON STOC COM 023608102 342,153 -22,940 -6.28 12,372 -2.74 0.0365
2013-11-05 2013-09-30 13F AMEREN CORPORATION COMMON STOC COM 023608102 365,093 6,421 1.79 12,720 2.97 0.0394
2013-08-07 2013-06-30 13F AMEREN CORPORATION COMMON STOC COM 023608102 358,672 358,672 12,353 0.0397
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.