미국 전력 회사, Inc.
MX ˙ BMV ˙ US0255371017
SecurityMX:AEP / American Electric Power Company, Inc.
InstitutionMarshall Wace, Llp
Latest Disclosed Ownership46,600 shares
Latest Disclosed Value $ 6,108,328
Marshall Wace, Llp reports 86.02% decrease in ownership of AEP / American Electric Power Company, Inc.

On May 14, 2026 - Marshall Wace, Llp filed a 13F-HR form disclosing ownership of 46,600 shares of American Electric Power Company, Inc. (MX:AEP) valued at $6,108,328 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 333,331 shares of American Electric Power Company, Inc.. This represents a change in shares of -86.02% 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)
2026-05-14 2026-03-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 46,600 -286,731 -86.02 6,108 -84.11 0.0061
2026-02-13 2025-12-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 333,331 -1,844,387 -84.69 38,436 -84.31 0.0350
2025-11-13 2025-09-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 2,177,718 287,541 15.21 244,993 24.92 0.2485
2025-08-13 2025-06-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 1,890,177 -240,547 -11.29 196,125 -15.76 0.2209
2025-05-15 2025-03-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 2,130,724 2,056,536 2,772.06 232,824 3,302.86 0.2956
2025-02-13 2024-12-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 74,188 -236,342 -76.11 6,842 -78.52 0.0082
2024-11-14 2024-09-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 310,530 84,276 37.25 31,860 60.50 0.0388
2024-08-14 2024-06-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 226,254 226,254 19,852 0.0265
2024-02-14 2023-12-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 0 -44,050 -100.00 0 -100.00
2023-11-14 2023-09-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 44,050 44,050 3,313 0.0067
2023-08-14 2023-06-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 0 -59,167 -100.00 0 -100.00
2023-05-15 2023-03-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 59,167 56,608 2,212.11 5,384 2,124.38 0.0114
2023-02-14 2022-12-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 2,559 -37,680 -93.64 243 -93.04 0.0005
2022-11-14 2022-09-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 40,239 40,239 3,478 0.0076
2022-05-16 2022-03-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 0 -1,066,861 -100.00 0 -100.00
2022-02-14 2021-12-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 1,066,861 999,221 1,477.26 94,919 1,628.63 0.1753
2021-11-15 2021-09-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 67,640 -105,413 -60.91 5,491 -62.49 0.0228
2021-08-13 2021-06-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 173,053 158,228 1,067.31 14,638 1,065.45 0.0713
2021-05-17 2021-03-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 14,825 -1,100 -6.91 1,256 -5.28 0.0058
2021-02-16 2020-12-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 15,925 15,925 7.42 1,326 5.57 0.0072
2020-08-13 2020-06-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 0 -57,858 -100.00 0 -100.00
2020-05-15 2020-03-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 57,858 -90,068 -60.89 4,627 -66.91 0.0462
2020-02-14 2019-12-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 147,926 1,866 1.28 13,981 2.17 0.0961
2019-11-14 2019-09-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 146,060 3,836 2.70 13,684 9.32 0.1076
2019-08-14 2019-06-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 142,224 142,224 -2.63 12,517 -8.53 0.1030
2019-05-14 2019-03-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 0 -125,497 -100.00 0 -100.00
2019-02-14 2018-12-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 125,497 -90,916 -42.01 9,380 -38.85 0.0957
2018-12-06 2018-09-30 13F/A-1 AMERICAN ELECTRI COMMON STOCK 025537101 216,413 -50,424 -18.90 15,339 -16.99 0.1305
2018-11-14 2018-09-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 216,413 -50,424 15,339
2018-08-14 2018-06-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 266,837 266,837 23.30 18,478 20.46 0.2765
2018-05-15 2018-03-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 0 -237,640 -100.00 0 -100.00
2018-03-29 2017-12-31 13F/A-1 AMERICAN ELECTRI COMMON STOCK 025537101 237,640 166,708 235.03 17,483 252.12 0.7347
2018-02-14 2017-12-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 237,640 166,708 17,483
2017-11-13 2017-09-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 70,932 70,932 -70.15 4,965 -71.60 0.2308
2017-08-04 2017-06-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 0 -37,224 -100.00 0 -100.00
2017-05-12 2017-03-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 37,224 -28,000 -42.93 2,494 -39.27 0.1204
2017-02-10 2016-12-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 65,224 36,622 128.04 4,107 123.57 0.0270
2016-11-10 2016-09-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 28,602 19,990 232.12 1,837 204.14 0.0131
2016-08-12 2016-06-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 8,612 -233,064 -96.44 604 -96.24 0.0051
2016-05-13 2016-03-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 241,676 203,885 539.51 16,047 628.75 0.1546
2016-02-10 2015-12-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 37,791 33,761 837.74 2,202 861.57 0.0207
2015-11-12 2015-09-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 4,030 4,030 -89.34 229 -89.60 0.0028
2015-02-17 2014-12-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 0 -72,554 -100.00 0 -100.00
2014-11-13 2014-09-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 72,554 18,419 34.02 3,788 25.47 0.0547
2014-08-14 2014-06-30 13F AMERICAN ELECTRI COMMON STOCK 025537101 54,135 47,776 751.31 3,019 837.58 0.0444
2014-05-14 2014-03-31 13F AMERICAN ELECTRI COMMON STOCK 025537101 6,359 6,359 322 0.0059
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.