June 30,
2025

December 31,
2024

(In millions)

Carrying Amount

Fair
Value

Carrying Amount

Fair
Value

Classification

Long-term Debt (including Long-term Debt due within one year):

OGE Energy Senior Notes

$

347.2

$

362.3

$

346.9

$

355.7

Level 2

OGE Energy Term Loan

$

59.8

$

60.0

$

59.7

$

60.0

Level 2

OG&E Senior Notes

$

4,845.5

$

4,596.9

$

4,499.6

$

4,174.9

Level 2

OG&E Industrial Authority Bonds

$

103.0

$

103.0

$

135.4

$

135.4

Level 2

OG&E Tinker Debt

$

11.7

$

9.0

$

11.7

$

9.0

Level 3