American Electric Power (AEP)

T&D Scale, ROE Mosaic

AEP is transmission-and-distribution-heavy scale with no consolidated rate-base line in the filings: segment proxies sum to roughly $77.6 billion (derived, 31 December 2025). Management targets roughly 10% CAGR to about $128 billion by 2030; the May 2026 capex update cites nearly 11% on $78 billion of spend. Authorised ROEs span 9.25%–10.50% by jurisdiction (APCo Virginia 9.75%, I&M Michigan 9.86%, AEPTCo transmission companies up to 10.50%), the widest mosaic in the utility comp set.

The regulated asset base is real, but the filing architecture is fragmented. Analysts must sum segment rate-base proxies and label the total as derived, then apply jurisdiction-specific ROEs rather than a single blended allowed return.

Business Overview

AEP operates vertically integrated utilities and standalone transmission companies across multiple states, with a T&D-heavy footprint relative to generation in several jurisdictions. The ~$77.6 billion derived total comes from the Rate Base and ROEs investor deck dated 31 March 2026; it is the sum of segment proxies, not a 10-K consolidated line. The rate base guide flags AEP as the derived-proxy teaching case alongside filed bases at Duke ($103.1B) and Dominion ($48.2B).

Transmission companies (AEPTCo) often earn the top of the authorised ROE range, up to 10.50% at FERC, while state-regulated distribution operating companies (opcos) sit lower (9.25%–9.86% in the verified range). The allowed vs earned ROE guide uses jurisdictional dispersion; AEP is the widest mosaic in the comp set.

The ~10% rate-base CAGR plan (nearly 11% in the May 2026 capex update) is mostly wires spend: grid hardening and transmission build-out across the footprint, with renewables integration layered in. AEP is a wires-growth story without NextEra's NEER merchant arm or Sempra's LNG slice.

How Regulated Utility Economics Work Here

Blended allowed ROE for AEP requires a segment-weighted average, rather than the 9.70% median from US electric rate cases decided between January and September 2025. Transmission at 10.50% and state opcos at 9.25%–9.86% produce a blended return at the parent-company (holdco) level above the 9.70% industry median if transmission is a growing share of the derived ~$77.6 billion base.

Operating EPS growth of 7%–9% (9% expected) exceeds Duke's 5%–7% on a faster rate-base plan and lower payout target. Payout at ~63% sits above the 50%–60% management target ($3.76 dividends on $5.97 operating EPS), leaving room to tighten policy if capex funding tightens.

Credit is the binding constraint for AEP more than for NextEra or Dominion. Moody's FFO/debt (funds from operations against debt) at 13.9% sits within the equity-issuance screen (RB CAGR >9% with FFO/debt within 50 bps of the ~14% floor this site treats as its investment-grade convention). S&P at 15.2% looks healthier, but agencies use different definitions. The FFO/debt guide places AEP alongside Sempra and Duke as live equity-risk cases.

Valuation Framework

AEP's ~10% rate-base CAGR is among the fastest in the comp set, but Moody's 13.9% FFO/debt sits closer to that ~14% floor than S&P's 15.2%, which is the credit question the P/E premium guide weighs against the growth rate.

On the 9 June 2026 close of $127.76 against FY2025 operating EPS of $5.97, trailing P/E was about 21.4x. The lack of a single filed rate-base headline complicates peer screens more than the multiple itself.

Sum-of-the-parts by opco is the specialist approach: apply jurisdiction-specific allowed ROE and equity ratio to each segment proxy, aggregate regulated earnings, subtract holdco costs. Generic peer P/E without segment work misstates earnings power for AEP more than for Duke.

Key Risks

Agency divergence. S&P 15.2% vs Moody's 13.9% on the same FY2025 year signals methodology and adjustment differences. Equity issuance to fund ~10% RB CAGR is a live risk on the Moody's lens.

Derived rate-base total. Segment sums can shift with deck revisions or reclassification. Always cite the 31 December 2025 derived label and source deck date.

Multi-state regulatory calendar. Eleven states plus FERC transmission proceedings create staggered ROE risk. One adverse order in a large opco moves the blended return.

Payout above target. ~63% actual vs 50%–60% target reduces retained earnings for the $78 billion capex plan. Dividend growth may lag operating EPS growth if management tightens toward target.

What the Screening Shows

Against the Regulated Utilities Sector Primer thresholds:

• Rate base: ~$77.6B derived segment sum (31 Dec 2025); ~10% CAGR to ~$128B by 2030. DERIVED label mandatory.
• Allowed ROE: 9.25%–10.50% by jurisdiction. Widest mosaic in comp set; transmission tops the range.
• EPS growth: 7%–9% (9% expected) off $5.97 operating EPS. Upper half of regulated peer range.
• FFO/debt: 15.2% S&P / 13.9% Moody's. Split verdict; Moody's triggers equity-issuance watch with >9% RB CAGR.
• Payout: ~63% vs 50%–60% target. Above policy; retention cushion exists but is thinner than payout ratio suggests.

Modellers should anchor on the derived ~$77.6 billion base and treat Moody's 13.9% FFO/debt as the dilution trigger if RB CAGR stays above 9%. The ROE mosaic is manageable; the agency split on credit is the binding screen.