Duke Energy (DUK)
The large-cap Southeast regulated benchmark: regulated earnings base of $103.1B, ~9.6% CAGR through 2030, FY2025 EPS of $6.31, FFO/debt of 14.8%, and ~$97.3B market cap.
Educational analysis for professional use. This profile is not investment advice or a recommendation to buy or sell any security, and it is not personalised.
Snapshot
The Regulated Benchmark
Duke is the clean large-cap wires-and-poles comp: mostly regulated, multi-state, and filed on numbers that map directly to the earnings model. The $103.1 billion regulated earnings base at end FY2025 is the largest in the comp set, with management targeting roughly 9.6% CAGR through 2030 (8.8% net of minority interest in Florida per plan footnote). Authorised ROEs cluster from 9.8% to 10.3% across Florida, Carolinas, Progress, and DEC South Carolina (9.94%). FY2025 EPS was $6.31 on identical GAAP and adjusted bases, with 5%–7% long-term growth through 2030; FFO-to-debt (funds from operations against debt, the utility sector's core credit metric) at 14.8% sits just under the 15% target while payout runs near 67% inside a 60%–70% policy band. Market cap was about $97.3 billion as of 10 June 2026.
When analysts say "regulated utility," Duke is often the mental picture: large-scale wires-and-poles without a major non-regulated growth engine, median-cluster ROEs, and a capex plan compounding rate base at high single digits. It is the calibration pair for Dominion in the P/E premium discussion: similar EPS growth bands, different rate-base CAGR and market cap.
Business Overview
Duke operates regulated electric and gas utilities across the Southeast and Midwest. Regulated earnings base is Duke's term for the asset base regulators use to set returns; functionally it is rate base under another label. The $103.1 billion figure is the consolidated regulated anchor disclosed in the Q4 2025 earnings materials.
The Southeast footprint shares demographics with Southern Company but without Vogtle's nuclear-completion overhang and without NextEra's NEER renewables arm. Duke Energy Florida is partially owned by minority interests, which is why the plan cites 8.8% net earnings-base growth in that jurisdiction versus 9.6% consolidated.
Authorised ROEs are set operating company by operating company (opco by opco) in state proceedings. The cluster from 9.8% to 10.3% straddles the top of the roughly 9%–10% range this site treats as the typical allowed-ROE band, and close to the 9.70% median from January–September 2025 US electric rate cases. None of Duke's operating companies carry FPL's above-median settlement band; earned ROE should track allowed more closely absent a major storm year or regulatory lag spike.
How Regulated Utility Economics Work Here
The regulated EPS build links rate-base growth, allowed ROE, and equity ratio to earnings. On Duke's plan, ~9.6% earnings-base CAGR through 2030 against mid-10% authorised ROEs and roughly 50% equity layers (industry average authorised equity was 48.74% in 2025 year-to-date rate cases) mechanically supports mid-single-digit EPS growth before financing effects. Management's 5%–7% target off the $6.31 FY2025 base is consistent with that maths plus modest dilution and holding-company costs.
FFO-to-debt at 14.8% sits just below the 15% long-term target and inside the 14%–16%+ range this site uses as its investment-grade (IG) credit convention. That proximity matters for the equity-issuance screen: when rate-base CAGR exceeds 9% and FFO/debt is within 50 bps of the ~14% floor, periodic equity raises become part of the funding plan. Duke at 14.8% versus a 15% target is a live case of thin credit headroom funding high-single-digit rate-base growth. The P/E premium guide contrasts Duke's ~9.6% CAGR with Dominion's 11.9% to show how growth rate moves utility multiples.
Dividend payout near 67% sits mid-band against the 60%–70% policy. Calendar 2025 dividends were $4.22 ($1.045 + $1.045 + $1.065 + $1.065) on EPS of $6.31. The dividend is the primary total-return mechanism; retention funds the regulated capex plan without stretching policy.
Valuation Framework
Rate-base CAGR is the main input to the P/E-premium framework covered in the primer: Duke's ~9.6% growth on a $103.1 billion base compares with Dominion's 11.9% on a $48.2 billion base, at a similar 5%–7% EPS growth target. The P/E premium guide and the primer's Valuation Summary sheet work through how the framework weighs that gap.
On the 10 June 2026 close of $125.18 against FY2025 EPS of $6.31, trailing P/E was about 19.8x. Sum-of-the-parts adds little here because the regulated share of earnings dominates.
The rate base guide lists Duke's $103.1 billion regulated earnings base alongside peer dollar bases. Use that line for earnings-power cross-checks, not enterprise value divided by an unlabelled "assets" figure from the 10-K.
Key Risks
Credit headroom. FFO/debt at 14.8% against a 15% target leaves little margin before the equity-issuance screen flags. A capex overrun or rating-agency methodology shift could force equity or slow the earnings-base CAGR.
Multi-jurisdiction regulatory risk. Carolinas, Florida, and Midwest proceedings run on different calendars. One adverse ROE order in a large opco moves the blended allowed return even if others hold steady.
Storm and restoration lag. Hurricane exposure in the Carolinas and Florida depresses earned ROE in event years before deferral mechanisms recover costs. The allowed-vs-earned gap is usually modest for Duke but not zero.
Slower rate-base growth than peers. Dominion (11.9%), Sempra (11%) and AEP (~10%) are all compounding regulated assets faster than Duke's 9.6%; Dominion does so on a similar 5%–7% EPS growth target, while Sempra and AEP pair the faster rate-base growth with 7%–9% targets. The P/E-premium framework explains why growth rate usually matters more than balance-sheet scale for how utility multiples get set.
What the Screening Shows
Against the Regulated Utilities Sector Primer thresholds:
- Rate base: Regulated earnings base $103.1B; ~9.6% plan CAGR. Largest filed dollar base in the comp set.
- Allowed ROE: 9.8%–10.3% by opco, around industry median. No settlement-band premium like FPL or Georgia Power.
- EPS growth: 5%–7% through 2030 off $6.31, a regulated compounder rather than a double-digit growth story.
- FFO/debt: 14.8% actual vs 15% target. Inside IG screen but near equity-issuance watch zone with >9% RB CAGR.
- Payout: ~67% inside 60%–70% policy. On policy.
Duke anchors the comp set for straight regulated scale. The open question turns less on EPS growth, 5%–7%, the same band as Dominion, than on whether 14.8% FFO/debt funds ~9.6% earnings-base CAGR without equity issuance.
Regulated Utilities Sector Primer
Earned net income less the growth in regulated equity capital drives the free-cash-flow-to-equity build, priced off rate base and allowed ROE, screened against payout, P/E and FFO-to-debt.
The Excel model is the primer's two archetype builds live across 13 sheets: free cash flow to equity, earned net income less the increase in the regulated equity book, discounted at the cost of equity, on rate base, equity ratio and allowed ROE, with the rate-base roll-forward, the FFO-to-debt headroom screen and the funding plan on their own sheets. Change the rate-base growth, the allowed ROE or the cost of equity and the value per share moves; the credit and funding sheets update alongside it.