As of December 31, 2022, FirstEnergy’s distribution and transmission circuit miles are located in PJM and were as follows: Distribution Line Miles(1) Transmission Line Miles ATSI — 7,921 CEI 33,118 — JCP&L 24,191 2,600 MAIT — 4,278 ME 19,117 — MP 22,832 2,607 OE 68,145 — PE 20,828 2,087 Penn 13,683 — PN 28,120 — TE 19,220 — TrAIL — 269 WP 25,264 4,318 Total 274,518 24,080 (1) Includes overhead pole line and underground conduit carrying primary, secondary and street lighting circuits ITEM 3. LEGAL PROCEEDINGS Reference is made to Note 12, "Regulatory Matters," and Note 13, "Commitments, Guarantees and Contingencies," of the Notes to Consolidated Financial Statements for a description of certain legal proceedings involving FirstEnergy. ITEM 4. MINE SAFETY DISCLOSURES Not applicable. 24
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