American Electric Power Company, Inc.
MX ˙ BMV ˙ US0255371017
SecurityMX:AEP / American Electric Power Company, Inc.
InstitutionKorea Investment CORP
Latest Disclosed Ownership440,337 shares
Latest Disclosed Value $ 57,719,374
Korea Investment CORP reports 13.12% increase in ownership of AEP / American Electric Power Company, Inc.

On May 13, 2026 - Korea Investment CORP filed a 13F-HR form disclosing ownership of 440,337 shares of American Electric Power Company, Inc. (MX:AEP) valued at $57,719,374 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 389,269 shares of American Electric Power Company, Inc.. This represents a change in shares of 13.12% 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)
2026-05-13 2026-03-31 13F AMERICAN ELEC PWR COM 025537101 440,337 51,068 13.12 57,719 28.59 0.1196
2026-02-13 2025-12-31 13F AMERICAN ELEC PWR COM 025537101 389,269 70,920 22.28 44,887 25.33 0.0884
2025-11-13 2025-09-30 13F AMERICAN ELEC PWR COM 025537101 318,349 -4,493 -1.39 35,814 6.91 0.0737
2025-08-13 2025-06-30 13F AMERICAN ELEC PWR COM 025537101 322,842 -8,913 -2.69 33,498 -7.59 0.0745
2025-05-14 2025-03-31 13F AMERICAN ELEC PWR COM 025537101 331,755 -432 -0.13 36,251 18.32 0.0879
2025-02-12 2024-12-31 13F AMERICAN ELEC PWR COM 025537101 332,187 -185,451 -35.83 30,638 -42.31 0.0726
2024-11-13 2024-09-30 13F AMERICAN ELEC PWR COM 025537101 517,638 28,687 5.87 53,110 23.80 0.1260
2024-08-13 2024-06-30 13F AMERICAN ELEC PWR COM 025537101 488,951 -278,155 -36.26 42,901 -35.05 0.1081
2024-05-14 2024-03-31 13F AMERICAN ELEC PWR COM 025537101 767,106 -116,153 -13.15 66,048 -7.93 0.1676
2024-02-13 2023-12-31 13F AMERICAN ELEC PWR COM 025537101 883,259 -5,977 -0.67 71,738 7.25 0.1884
2023-11-13 2023-09-30 13F AMERICAN ELEC PWR COM 025537101 889,236 58,219 7.01 66,888 -4.41 0.1970
2023-08-11 2023-06-30 13F AMERICAN ELEC PWR COM 025537101 831,017 295,750 55.25 69,972 43.67 0.1966
2023-05-12 2023-03-31 13F AMERICAN ELEC PWR COM 025537101 535,267 -18,942 -3.42 48,704 -7.45 0.1418
2023-02-13 2022-12-31 13F AMERICAN ELEC PWR COM 025537101 554,209 -67,917 -10.92 52,622 -2.16 0.1653
2022-11-10 2022-09-30 13F AMERICAN ELEC PWR COM 025537101 622,126 32,940 5.59 53,783 -4.85 0.1656
2022-08-12 2022-06-30 13F AMERICAN ELEC PWR COM 025537101 589,186 -203,800 -25.70 56,527 -28.55 0.1728
2022-05-13 2022-03-31 13F AMERICAN ELEC PWR COM 025537101 792,986 15,584 2.00 79,116 14.39 0.1957
2022-02-09 2021-12-31 13F AMERICAN ELEC PWR COM 025537101 777,402 125,743 19.30 69,165 30.74 0.1798
2021-11-12 2021-09-30 13F AMERICAN ELEC PWR COM 025537101 651,659 548,059 529.01 52,902 503.63 0.1577
2021-08-12 2021-06-30 13F AMERICAN ELEC PWR COM 025537101 103,600 -2,900 -2.72 8,764 -2.85 0.0251
2021-05-13 2021-03-31 13F AMERICAN ELEC PWR COM 025537101 106,500 -2,000 -1.84 9,021 -0.15 0.0285
2021-02-10 2020-12-31 13F AMERICAN ELEC PWR COM 025537101 108,500 -158,800 -59.41 9,035 -58.64 0.0271
2020-11-12 2020-09-30 13F AMERICAN ELEC PWR COM 025537101 267,300 -16,800 -5.91 21,846 -3.45 0.0772
2020-08-12 2020-06-30 13F AMERICAN ELEC PWR COM 025537101 284,100 16,000 5.97 22,626 5.52 0.0831
2020-05-14 2020-03-31 13F AMERICAN ELEC PWR COM 025537101 268,100 -117,941 -30.55 21,443 -41.23 0.0941
2020-02-11 2019-12-31 13F AMERICAN ELEC PWR COM 025537101 386,041 11,700 3.13 36,485 4.03 0.1330
2019-11-12 2019-09-30 13F AMERICAN ELEC PWR COM 025537101 374,341 12,900 3.57 35,072 10.25 0.1483
2019-08-12 2019-06-30 13F AMERICAN ELEC PWR COM 025537101 361,441 -57,200 -13.66 31,810 -9.27 0.1368
2019-05-15 2019-03-31 13F AMERICAN ELEC PWR COM 025537101 418,641 1,158 0.28 35,061 12.36 0.1578
2019-02-13 2018-12-31 13F AMERICAN ELEC PWR COM 025537101 417,483 -22,800 -5.18 31,203 -0.01 0.1696
2018-11-13 2018-09-30 13F AMERICAN ELEC PWR COM 025537101 440,283 205,278 87.35 31,207 91.76 0.1439
2018-08-13 2018-06-30 13F AMERICAN ELEC PWR COM 025537101 235,005 2,400 1.03 16,274 2.01 0.0742
2018-05-09 2018-03-31 13F AMERICAN ELEC PWR COM 025537101 232,605 -27,659 -10.63 15,954 -16.68 0.0742
2018-02-12 2017-12-31 13F AMERICAN ELEC PWR COM 025537101 260,264 36,500 16.31 19,148 21.83 0.0872
2017-10-25 2017-09-30 13F AMERICAN ELEC PWR COM 025537101 223,764 -5,200 -2.27 15,717 -1.19 0.0726
2017-07-31 2017-06-30 13F AMERICAN ELEC PWR COM 025537101 228,964 31,878 16.17 15,906 20.23 0.0741
2017-04-25 2017-03-31 13F AMERICAN ELEC PWR COM 025537101 197,086 131,606 200.99 13,230 220.88 0.0656
2017-02-13 2016-12-31 13F AMERICAN ELEC PWR COM 025537101 65,480 34,480 111.23 4,123 107.08 0.0198
2016-11-09 2016-09-30 13F AMERICAN ELEC PWR COM 025537101 31,000 -17,800 -36.48 1,991 -41.78 0.0106
2016-08-12 2016-06-30 13F AMERICAN ELEC PWR COM 025537101 48,800 31,400 180.46 3,420 196.10 0.0204
2016-05-12 2016-03-31 13F AMERICAN ELEC PWR COM 025537101 17,400 -112,400 -86.59 1,155 -84.73 0.0084
2016-02-01 2015-12-31 13F AMERICAN ELEC PWR COM 025537101 129,800 -75,800 -36.87 7,563 -35.30 0.0527
2015-11-12 2015-09-30 13F AMERICAN ELEC PWR COM 025537101 205,600 28,700 16.22 11,690 24.76 0.0931
2015-08-13 2015-06-30 13F AMERICAN ELEC PWR COM 025537101 176,900 45,700 34.83 9,370 26.96 0.0799
2015-05-11 2015-03-31 13F AMERICAN ELEC PWR COM 025537101 131,200 7,900 6.41 7,380 -1.43 0.0575
2015-02-12 2014-12-31 13F AMERICAN ELEC PWR COM 025537101 123,300 -454,000 -78.64 7,487 -75.16 0.0615
2014-11-14 2014-09-30 13F AMERICAN ELEC PWR COM 025537101 577,300 31,500 5.77 30,141 -0.98 0.2459
2014-08-14 2014-06-30 13F AMERICAN ELEC PWR COM 025537101 545,800 -65,200 -10.67 30,439 -1.66 0.2534
2014-05-14 2014-03-31 13F AMERICAN ELEC PWR COM 025537101 611,000 -221,000 -26.56 30,953 -20.40 0.2741
2014-02-06 2013-12-31 13F AMERICAN ELEC PWR COM 025537101 832,000 32,300 4.04 38,888 12.18 0.3677
2013-11-07 2013-09-30 13F/A-1 AMERICAN ELEC PWR COM 025537101 799,700 57,800 7.79 34,667 4.35 0.3683
2013-11-05 2013-09-30 13F AMERICAN ELEC PWR COM 025537101 602,500 26,118
2013-08-08 2013-06-30 13F AMERICAN ELEC PWR COM 025537101 741,900 741,900 33,222 0.3982
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.