아메렌 코퍼레이션
MX ˙ BMV ˙ US0236081024
SecurityMX:AEE / Ameren Corporation
InstitutionBlair William & Co/il
Latest Disclosed Ownership4,880 shares
Latest Disclosed Value $ 536,387
Blair William & Co/il reports 17.76% increase in ownership of AEE / Ameren Corporation

On May 8, 2026 - Blair William & Co/il filed a 13F-HR form disclosing ownership of 4,880 shares of Ameren Corporation (MX:AEE) valued at $536,387 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 4,144 shares of Ameren Corporation. This represents a change in shares of 17.76% 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)
2026-05-08 2026-03-31 13F AMEREN COM 023608102 4,880 736 17.76 536 29.78 0.0015
2026-02-17 2025-12-31 13F AMEREN COM 023608102 4,144 674 19.42 414 14.09 0.0011
2025-11-12 2025-09-30 13F AMEREN COM 023608102 3,470 -478 -12.11 362 -4.49 0.0010
2025-07-24 2025-06-30 13F AMEREN COM 023608102 3,948 85 2.20 379 -2.07 0.0011
2025-05-09 2025-03-31 13F AMEREN COM 023608102 3,863 450 13.18 388 27.30 0.0012
2025-02-12 2024-12-31 13F AMEREN COM 023608102 3,413 12 0.35 304 2.36 0.0009
2024-11-12 2024-09-30 13F AMEREN COM 023608102 3,401 -11 -0.32 297 22.73 0.0009
2024-08-12 2024-06-30 13F AMEREN COM 023608102 3,412 -1,319 -27.88 243 -30.66 0.0007
2024-05-09 2024-03-31 13F AMEREN COM 023608102 4,731 252 5.63 350 8.05 0.0011
2024-02-12 2023-12-31 13F AMEREN COM 023608102 4,479 -11 -0.24 324 -3.58 0.0011
2023-11-09 2023-09-30 13F AMEREN COM 023608102 4,490 605 15.57 336 5.68 0.0013
2023-08-11 2023-06-30 13F AMEREN COM 023608102 3,885 -121 -3.02 317 -8.38 0.0012
2023-05-12 2023-03-31 13F AMEREN COM 023608102 4,006 -1,113 -21.74 346 -23.96 0.0014
2023-02-10 2022-12-31 13F AMEREN COM 023608102 5,119 1,105 27.53 455 40.87 0.0020
2022-11-09 2022-09-30 13F AMEREN COM 023608102 4,014 41 1.03 323 -10.03 0.0015
2022-08-10 2022-06-30 13F AMEREN COM 023608102 3,973 205 5.44 359 1.70 0.0016
2022-05-13 2022-03-31 13F AMEREN COM 023608102 3,768 -224 -5.61 353 -0.56 0.0012
2022-02-14 2021-12-31 13F AMEREN COM 023608102 3,992 -41 -1.02 355 8.56 0.0011
2021-11-12 2021-09-30 13F AMEREN COM 023608102 4,033 -114 -2.75 327 -1.51 0.0011
2021-08-12 2021-06-30 13F AMEREN COM 023608102 4,147 -100 -2.35 332 -4.05 0.0012
2021-05-13 2021-03-31 13F AMEREN COM 023608102 4,247 -3 -0.07 346 4.22 0.0013
2021-02-09 2020-12-31 13F AMEREN COM 023608102 4,250 -1,838 -30.19 332 -30.98 0.0012
2020-11-06 2020-09-30 13F AMEREN COM 023608102 6,088 -4 -0.07 481 12.12 0.0020
2020-08-12 2020-06-30 13F AMEREN COM 023608102 6,092 61 1.01 429 -2.28 0.0020
2020-05-11 2020-03-31 13F AMEREN COM 023608102 6,031 2 0.03 439 -5.18 0.0027
2020-02-13 2019-12-31 13F AMEREN COM 023608102 6,029 38 0.63 463 -3.54 0.0024
2019-11-12 2019-09-30 13F AMEREN COM 023608102 5,991 82 1.39 480 8.11 0.0028
2019-08-13 2019-06-30 13F AMEREN COM 023608102 5,909 2,152 57.28 444 60.87 0.0025
2019-05-14 2019-03-31 13F AMEREN COM 023608102 3,757 3,757 276 0.0017
2018-08-13 2018-06-30 13F AMEREN COM 023608102 0 -4,073 -100.00 0 -100.00
2018-05-15 2018-03-31 13F AMEREN COM 023608102 4,073 -1,080 -20.96 231 -24.01 0.0016
2018-02-14 2017-12-31 13F AMEREN COM 023608102 5,153 0 0.00 304 2.01 0.0021
2017-11-13 2017-09-30 13F AMEREN COM 023608102 5,153 450 9.57 298 15.95 0.0022
2017-08-04 2017-06-30 13F AMEREN COM 023608102 4,703 -200 -4.08 257 -4.10 0.0019
2017-05-10 2017-03-31 13F AMEREN COM 023608102 4,903 -625 -11.31 268 -7.59 0.0022
2017-02-14 2016-12-31 13F AMEREN COM 023608102 5,528 225 4.24 290 11.11 0.0026
2016-11-14 2016-09-30 13F AMEREN COM 023608102 5,303 -220 -3.98 261 -11.82 0.0023
2016-08-08 2016-06-30 13F AMEREN COM 023608102 5,523 -180 -3.16 296 3.50 0.0028
2016-05-16 2016-03-31 13F AMEREN COM 023608102 5,703 37 0.65 286 17.21 0.0027
2016-02-16 2015-12-31 13F AMEREN COM 023608102 5,666 40 0.71 244 2.95 0.0023
2015-11-12 2015-09-30 13F AMEREN COM 023608102 5,626 60 1.08 237 13.40 0.0021
2015-08-03 2015-06-30 13F AMEREN COM 023608102 5,566 -5,100 -47.82 209 -53.56 0.0003
2015-05-11 2015-03-31 13F AMEREN COM 023608102 10,666 10,666 0.00 450 0.0007
2015-02-05 2014-12-31 13F AMEREN COM 023608102 0 -7,475 -100.00 0 -100.00
2014-11-04 2014-09-30 13F AMEREN COM 023608102 7,475 -4 -0.05 286 -6.23 0.0005
2014-08-01 2014-06-30 13F AMEREN COM 023608102 7,479 120 1.63 305 0.66 0.0005
2014-05-06 2014-03-31 13F AMEREN COM 023608102 7,359 51 0.70 303 14.77 0.0005
2014-02-11 2013-12-31 13F AMEREN COM 023608102 7,308 25 0.34 264 4.35 0.0004
2013-11-12 2013-09-30 13F AMEREN COM 023608102 7,283 -110 -1.49 253 -0.39 0.0004
2013-08-07 2013-06-30 13F AMEREN COM 023608102 7,393 7,393 254 0.0005
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.