Key Takeaways
NiSource's fiscal year 2025 (calendar year ended December 31, 2025) demonstrated the execution of a long-cycle regulated utility capital program that has compounded rate base and earnings at above-average utility sector rates since the 2020 sale of Columbia Gas of Massachusetts following the Merrimack Valley gas explosion settlement. Revenue reached approximately $5.1B with net revenues (after commodity costs) of approximately $3.4B, and non-GAAP diluted EPS reached approximately $1.70-1.75, up 6-8% from FY2024's approximately $1.62, continuing a six-year streak of 6-8% annual EPS growth driven entirely by regulated capital investment. The $16-18B capital expenditure plan through FY2028 — concentrated in gas system modernization, electric transmission and distribution upgrades, and the accelerating renewable generation transition in NIPSCO (Northern Indiana Public Service Company) — continues to expand the regulated rate base at approximately 8-10% annually, which mechanically drives equivalent earnings growth. NiSource's data center opportunity in Indiana has emerged as an incremental demand catalyst: NIPSCO has disclosed several large industrial load additions, including data center customers, that accelerate the capital investment cycle and support the rate case trajectory. The thesis falsification condition is whether state utility commissions in Indiana, Ohio, Pennsylvania, Virginia, Kentucky, and Maryland approve rate cases that allow NiSource to earn a reasonable return on its capital program — regulatory lag and disallowances represent the primary earnings risk in an otherwise predictable business.
NiSource is a Columbus, Ohio-based regulated utility holding company operating natural gas distribution (through Columbia Gas brands) and electric generation, transmission, and distribution (through NIPSCO) across six states in the Midwest and Mid-Atlantic. The company serves approximately 3.2M gas customers and approximately 470,000 electric customers. After the 2020 Columbia Gas of Massachusetts divestiture — which followed the 2018 Merrimack Valley gas explosions, a settlement with Massachusetts, and the sale of the MA business to Eversource for $1.1B — NiSource rebuilt its regulatory standing through a sustained capital investment and safety modernization program. CEO Lloyd Yates, who joined in 2021 after leading Duke Energy Carolinas, has positioned NiSource around a simple compounding story: invest capital in aging infrastructure upgrades that regulators mandate and approve, earn regulated returns, and grow EPS at 6-8% annually with the reliability of a contracted cash flow stream.
NIPSCO (Northern Indiana Public Service Company) is the more complex and more strategically interesting of the two major operating businesses. In addition to gas distribution, NIPSCO operates electric generation and distribution serving northern Indiana industrial and residential customers, and has committed to a full coal plant retirement program, replacing coal-fired generation with a combination of wind, solar, and battery storage through regulated power purchase agreements and owned generation. The NIPSCO electric transition — coal fleet fully retired by approximately 2028 — is the largest per-customer renewable transition program of any Midwest utility, and the capital requirement to replace coal generation creates above-average rate base growth within the electric segment specifically.
Business Structure
NiSource reports through two segments.
Gas Distribution (~$2.2B net revenues, ~65% of total net revenues): Natural gas distribution operations under the Columbia Gas brand across Ohio, Pennsylvania, Virginia, Kentucky, and Maryland, plus the NiSource Gas Distribution segment in Indiana. This segment serves approximately 3.2M residential, commercial, and industrial customers and is the backbone of NiSource's earnings. Revenue is predominantly distribution service charges (not commodity costs, which pass through to customers) subject to weather normalization mechanisms in most states. Capital investment in gas system modernization — pipeline replacement, leak detection, pressure regulator upgrades — drives the annual rate base growth that feeds earnings.
Electric Operations (NIPSCO, ~$1.2B net revenues, ~35%): Electric generation, transmission, and distribution serving approximately 470,000 northern Indiana customers. The coal-to-renewables transition creates elevated capital spending (approximately $2-3B through 2028 for new renewable capacity additions and grid upgrades) and corresponding rate base growth. NIPSCO has disclosed data center customer load additions that provide incremental demand to support transmission and distribution investment beyond the residential/industrial baseline.
Key Core Metrics Performance
EPS and Rate Base Growth (FY2020–FY2025)
The compounding rate base growth → regulated earnings growth equation has been consistent since the 2020 restructuring.
| Fiscal Year | Non-GAAP EPS | YoY Growth | Rate Base (approx.) |
|---|---|---|---|
| FY2020 | $1.36 | — | ~$9.5B |
| FY2021 | $1.46 | +7.4% | ~$10.3B |
| FY2022 | $1.52 | +4.1% | ~$11.2B |
| FY2023 | $1.58 | +3.9% | ~$12.2B |
| FY2024 | $1.62 | +2.5% | ~$13.2B |
| FY2025 | ~$1.73 | ~+6.8% | ~$14.4B |
The FY2022-FY2024 EPS growth deceleration reflected higher interest expense from rising rates (NiSource issues significant long-term debt to fund capex) partially offsetting rate base growth. The FY2025 acceleration reflects rate case outcomes that brought authorized returns closer to current cost of debt, reducing the regulatory lag impact.
Capital Expenditure Program (FY2023–FY2028 Plan)
NiSource's multi-year capex plan is the primary earnings driver.
| Period | Annual CapEx | Cumulative Rate Base Addition |
|---|---|---|
| FY2023 | ~$2.0B | +$1.2B to rate base |
| FY2024 | ~$2.2B | +$1.3B |
| FY2025 | ~$2.5B | +$1.5B |
| FY2026E | ~$2.8B | +$1.7B |
| FY2027E | ~$3.0B | +$1.8B |
The capital program acceleration from $2.0B in FY2023 to an expected ~$3.0B by FY2027 reflects both the NIPSCO electric transition spend and incremental gas system modernization accelerated by state mandates. Higher capex requires more debt financing, partially offsetting the rate base benefit, but the net effect is positive EPS growth of 6-8% annually.
Dividend and Balance Sheet (FY2021–FY2025)
| Fiscal Year | Annual DPS | Dividend Growth | Debt/Capitalization |
|---|---|---|---|
| FY2021 | $0.88 | +6.0% | ~55% |
| FY2022 | $0.94 | +6.8% | ~56% |
| FY2023 | $0.98 | +4.3% | ~57% |
| FY2024 | $1.02 | +4.1% | ~58% |
| FY2025 | ~$1.08 | ~+5.9% | ~59% |
NiSource's leverage has crept upward with the accelerating capex program; management targets long-term debt/capitalization below 60%. The dividend growth rate of approximately 5-7% annually aligns with EPS growth and provides an approximately 3.5-4.0% yield at prevailing prices, making NiSource a total return candidate for income-oriented utility investors.
Market Evaluation
NiSource trades at approximately 17-19x forward earnings and approximately 1.6-1.8x rate base value — in line with regulated gas/electric utility peers and representing a modest premium to pure-play gas distribution companies, reflecting the NIPSCO electric transition optionality. The bull case is that the Indiana data center demand surge expands NIPSCO's capital investment opportunity beyond the coal retirement program, supporting rate base growth above the current plan and potentially allowing NiSource to raise its long-term EPS growth target from 6-8% toward 8-10%. The bear case is regulatory: rate cases in Ohio, Pennsylvania, and Indiana have historically been contentious, and if authorized ROEs are set below the capital cost of debt-funded infrastructure, NiSource's earn-through on its capital program will be impaired. A 25bp reduction in authorized ROE across the utility portfolio would reduce annual earnings by approximately $40-50M, or roughly $0.10-0.12 per share — material but not thesis-breaking at current multiples.
NIPSCO Electric Transition and Data Center Load
The NIPSCO electric transition — from 100% coal in 2018 to 100% renewable by approximately 2028 — is both NiSource's largest capital investment commitment and its most strategically differentiated asset within the regulated utility sector. The program involves retiring three coal plants totaling approximately 1.8 GW of capacity and replacing them with approximately 2.5-3.0 GW of wind, solar, and battery storage through a combination of owned generation and long-term power purchase agreements with independent generators. State regulatory approval for each incremental renewable project involves Indiana Utility Regulatory Commission review, creating a visible pipeline of rate base additions through the end of the decade.
The data center load additions to NIPSCO's service territory represent an unexpected positive to the capital plan. Northern Indiana — relatively low-cost land, access to water, and proximity to fiber routes connecting Chicago to the Northeast — has attracted several large-scale data center developments, including at least two disclosed hyperscaler sites. Each large data center campus adds approximately 100-300 MW of electric demand, requiring transmission and distribution investment to serve the new load. NIPSCO's transmission investment, already elevated for the renewable integration program, has incremental justified capex from these load additions that was not in the original capital plan. Management disclosed in FY2025 that data center-related transmission investment could add approximately $200-400M to the FY2026-FY2028 capital program above prior guidance — approximately 10-15% incremental to the existing plan. This demand acceleration supports the case for raising the EPS growth target modestly above the current 6-8% range, which would be a positive catalyst for the stock.