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FAIR VALUE MEASUREMENTS | 12 Months Ended
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Dec. 31, 2024
EBP 002 |
EBP, Investment, Fair Value and NAV [Line Items] |
FAIR VALUE MEASUREMENTS | FAIR VALUE MEASUREMENTS For a discussion of fair value accounting and the classification of assets within the fair value hierarchy, see the “Fair Value Measurements of Assets” section of Note 2. Plan Assets within the Fair Value Hierarchy as of December 31, 2024
|  | Level 1 |  | Level 2 |  | Level 3 |  | Other |  | Total
Equities |  |  |  |  |  |  |  |  |  |
Corporate Stocks |  | $ | 554,966,516 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 554,966,516 |
AEP Stock |  | 254,007,692 |  |  | — |  |  | — |  |  | — |  |  | 254,007,692 |
Subtotal Equities |  | 808,974,208 |  |  | — |  |  | — |  |  | — |  |  | 808,974,208 |
Common/Collective Trusts |  |  |  |  |  |  |  |  |  |
Mellon Capital Small Cap Stock Index Fund (a) |  | — |  |  | — |  |  | — |  |  | 169,951,861 |  |  | 169,951,861 |
Mellon Capital Mid Cap Stock Index Fund (a) |  | — |  |  | — |  |  | — |  |  | 459,321,305 |  |  | 459,321,305 |
Mellon Capital Stock Index Fund (a) |  | — |  |  | — |  |  | — |  |  | 1,429,311,150 |  |  | 1,429,311,150 |
Mellon Capital International Stock Index Fund (a) |  | — |  |  | — |  |  | — |  |  | 690,699,519 |  |  | 690,699,519 |
Mellon Capital Aggregate Bond Index Fund (a) |  | — |  |  | — |  |  | — |  |  | 511,889,594 |  |  | 511,889,594 |
Mellon Capital Treasury Inflation-Protected Securities Fund (a) |  | — |  |  | — |  |  | — |  |  | 24,183,840 |  |  | 24,183,840 |
JPMorgan Strategic Property Fund (a) |  | — |  |  | — |  |  | — |  |  | 84,071,443 |  |  | 84,071,443 |
Mellon Capital Emerging Markets Stock Index Fund (a) |  | — |  |  | — |  |  | — |  |  | 65,013,298 |  |  | 65,013,298 |
William Blair Large Cap Growth I (a) |  | — |  |  | — |  |  | — |  |  | 214,753,054 |  |  | 214,753,054 |
Sands Capital International Growth CIT (a) |  | — |  |  | — |  |  | — |  |  | 22,073,747 |  |  | 22,073,747 |
MetWest Total Return Bond Fund (a) |  | — |  |  | — |  |  | — |  |  | 59,886,326 |  |  | 59,886,326 |
Subtotal Common/Collective Trusts |  | — |  |  | — |  |  | — |  |  | 3,731,155,137 |  |  | 3,731,155,137 |
Self-Directed Brokerage Account (a) |  | 107,255,995 |  |  | — |  |  | — |  |  | 13,195,992 |  |  | 120,451,987 |
Registered Investment Companies |  | 22,131,794 |  |  | — |  |  | — |  |  | — |  |  | 22,131,794 |
Money Market Fund |  | 36,776,191 |  |  | — |  |  | — |  |  | — |  |  | 36,776,191 |
Total Assets Reflecting Investments at Fair Value |  | $ | 975,138,188 |  |  | $ | — |  |  | $ | — |  |  | $ | 3,744,351,129 |  |  | $ | 4,719,489,317 |
(a)Amounts in “Other” column represent investments for which fair value is measured using net asset value per share as practical expedient. Plan Assets within the Fair Value Hierarchy as of December 31, 2023
|  | Level 1 |  | Level 2 |  | Level 3 |  | Other |  | Total
Equities |  |  |  |  |  |  |  |  |  |
Corporate Stocks |  | $ | 557,042,541 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 557,042,541 |
AEP Stock |  | 272,036,887 |  |  | — |  |  | — |  |  | — |  |  | 272,036,887 |
Subtotal Equities |  | 829,079,428 |  |  | — |  |  | — |  |  | — |  |  | 829,079,428 |
Common/Collective Trusts |  |  |  |  |  |  |  |  |  |
Mellon Capital Small Cap Stock Index Fund (a) |  | — |  |  | — |  |  | — |  |  | 179,341,271 |  |  | 179,341,271 |
Mellon Capital Mid Cap Stock Index Fund (a) |  | — |  |  | — |  |  | — |  |  | 456,261,518 |  |  | 456,261,518 |
Mellon Capital Stock Index Fund (a) |  | — |  |  | — |  |  | — |  |  | 1,298,414,738 |  |  | 1,298,414,738 |
Mellon Capital International Stock Index Fund (a) |  | — |  |  | — |  |  | — |  |  | 704,972,081 |  |  | 704,972,081 |
Mellon Capital Aggregate Bond Index Fund (a) |  | — |  |  | — |  |  | — |  |  | 521,308,895 |  |  | 521,308,895 |
Mellon Capital Treasury Inflation-Protected Securities Fund (a) |  | — |  |  | — |  |  | — |  |  | 24,749,151 |  |  | 24,749,151 |
JPMorgan Strategic Property Fund (a) |  | — |  |  | — |  |  | — |  |  | 68,468,634 |  |  | 68,468,634 |
Mellon Capital Emerging Markets Stock Index Fund (a) |  | — |  |  | — |  |  | — |  |  | 60,252,437 |  |  | 60,252,437 |
Columbia Trust Focused Large Cap Growth Fund (a) |  | — |  |  | — |  |  | — |  |  | 195,092,837 |  |  | 195,092,837 |
Sands Capital International Growth CIT (a) |  | — |  |  | — |  |  | — |  |  | 25,623,845 |  |  | 25,623,845 |
MetWest Total Return Bond Fund (a) |  | — |  |  | — |  |  | — |  |  | 65,185,142 |  |  | 65,185,142 |
Subtotal Common/Collective Trusts |  | — |  |  | — |  |  | — |  |  | 3,599,670,549 |  |  | 3,599,670,549 |
Self-Directed Brokerage Account (a) |  | 86,302,881 |  |  | — |  |  | — |  |  | 15,361,054 |  |  | 101,663,935 |
Registered Investment Companies |  | 24,523,069 |  |  | — |  |  | — |  |  | — |  |  | 24,523,069 |
Money Market Fund |  | 47,714,108 |  |  | — |  |  | — |  |  | — |  |  | 47,714,108 |
Total Assets Reflecting Investments at Fair Value |  | $ | 987,619,486 |  |  | $ | — |  |  | $ | — |  |  | $ | 3,615,031,603 |  |  | $ | 4,602,651,089 |
(a)Amounts in “Other” column represent investments for which fair value is measured using net asset value per share as practical expedient. The following tables set forth a summary of the Plan's investments measured at Net Asset Value as a practical expedient as of December 31, 2024 and 2023: Fair Value Estimated Using Net Asset Value per Share as of December 31, 2024
|  | Fair Value |  | Redemption Frequency (If currently eligible) |  | Redemption Notice Period
Mellon Capital Small Cap Stock Index Fund |  | $ | 169,951,861 |  |  | Daily |  | Trade Date + 1
Mellon Capital Mid Cap Stock Index Fund |  | 459,321,305 |  |  | Daily |  | Trade Date + 1
Mellon Capital Stock Index Fund |  | 1,429,311,150 |  |  | Daily |  | Trade Date + 1
Mellon Capital International Stock Index Fund |  | 690,699,519 |  |  | Daily |  | Trade Date + 1
Mellon Capital Aggregate Bond Index Fund |  | 511,889,594 |  |  | Daily |  | Trade Date + 1
Mellon Capital Treasury Inflation-Protected Securities Fund |  | 24,183,840 |  |  | Daily |  | Trade Date + 1
JPMorgan Strategic Property Fund |  | 84,071,443 |  |  | Quarterly |  | 30 Days
Mellon Capital Emerging Markets Stock Index Fund |  | 65,013,298 |  |  | Daily |  | Trade Date + 1
William Blair Large Cap Growth I |  | 214,753,054 |  |  | Daily |  | Trade Date + 1
Sands Capital International Growth CIT |  | 22,073,747 |  |  | Daily |  | Trade Date + 1
MetWest Total Return Bond Fund |  | 59,886,326 |  |  | Daily |  | Trade Date + 1
Self-Directed Brokerage Account |  | 13,195,992 |  |  | Daily |  | Trade Date + 1
Total Assets |  | $ | 3,744,351,129 |  |  |  |  |
Fair Value Estimated Using Net Asset Value per Share as of December 31, 2023
|  | Fair Value |  | Redemption Frequency (If currently eligible) |  | Redemption Notice Period
Mellon Capital Small Cap Stock Index Fund |  | $ | 179,341,271 |  |  | Daily |  | Trade Date + 1
Mellon Capital Mid Cap Stock Index Fund |  | 456,261,518 |  |  | Daily |  | Trade Date + 1
Mellon Capital Stock Index Fund |  | 1,298,414,738 |  |  | Daily |  | Trade Date + 1
Mellon Capital International Stock Index Fund |  | 704,972,081 |  |  | Daily |  | Trade Date + 1
Mellon Capital Aggregate Bond Index Fund |  | 521,308,895 |  |  | Daily |  | Trade Date + 1
Mellon Capital Treasury Inflation-Protected Securities Fund |  | 24,749,151 |  |  | Daily |  | Trade Date + 1
JPMorgan Strategic Property Fund |  | 68,468,634 |  |  | Quarterly |  | 30 Days
Mellon Capital Emerging Markets Stock Index Fund |  | 60,252,437 |  |  | Daily |  | Trade Date + 1
Columbia Trust Focused Large Cap Growth Fund |  | 195,092,837 |  |  | Daily |  | Trade Date + 1
Sands Capital International Growth CIT |  | 25,623,845 |  |  | Daily |  | Trade Date + 1
MetWest Total Return Bond Fund |  | 65,185,142 |  |  | Daily |  | Trade Date + 1
Self-Directed Brokerage Account |  | 15,361,054 |  |  | Daily |  | Trade Date + 1
Total Assets |  | $ | 3,615,031,603 |  |  |  |  |
It is the Plan’s policy to record transfers in and transfers out of each level at the end of each reporting period. There have been no transfers between Level 1, Level 2, and Level 3 during the years ended December 31, 2024 and 2023.

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