NI · 10-Q · 2026Q2 · Full report

Operating Expense Trends

NISOURCE INC. · 2026-08-05 · Importance 54 · Surprise 40 · In source text

Consolidated six-month other operating expenses increased $260.8 million, or 17.0%, to $1,795.4 million, while total operating expenses increased $214.3 million to $2,658.2 million. Columbia Operations recorded $52.9 million of higher operation and maintenance expense, including $11.3 million of outside services and $2.7 million of employee and administrative costs, plus $32.4 million of higher depreciation and amortization. NIPSCO Operations recorded $78.8 million of higher operation and maintenance expense and $77.7 million of higher depreciation and amortization, including $30.5 million of workplace-continuity costs and $16.8 million of higher outside services.

Key facts

• Consolidated total operating expenses for the three months ended June 30, 2026: $1,114.3 million. source
• Consolidated total operating expenses for the six months ended June 30, 2026: $2,658.2 million. source
• During the NIPSCO lockout period, incremental costs were incurred to support work continuity plans consisting of external and internal labor and other outside services including power delivery, gas operations, security, generation, and administrative costs. source
• There were no material changes made to NiSource's critical accounting estimates as of June 30, 2026. source

Impact estimates