OTTR, Otter Tail

The allowed return, earned and credited

• Earned return on equity 13.1%
  Above the typical allowed band
  Median over 10 readable years · latest FY2025: 14.8% (net income $276M ÷ equity $1.9B)
  What this means

  A commission caps what a regulated utility may earn on shareholders' capital, so the question is not whether the return is high but whether the company actually earns what it is allowed — persistent under-earning means costs the regulator will not put in rates, and a return above the band usually means unregulated businesses in the mix. Read through the record, because a single year carries rate-case timing noise.

• AFUDC in earnings —
  Not enough data
  What this means

  The equity allowance for funds used during construction is not tagged in this filer's structured data — the construction credit, if any, lives in the 10-K's rate-matters note.

The invested base and the regulatory ledger

• Net utility plant $2.7B
  Growing ≈ 9.0%/yr
  Utility plant net of depreciation, as filed · FY2023→FY2025: $2.3B → $2.7B, ≈ 9.0%/yr
  What this means

  The closest filed figure to the rate base — the invested capital the commission sets the allowed return on. Its growth rate is the utility's reinvestment runway: under regulation, earnings power compounds roughly as fast as the base the return is earned on, funded by capital the regulator lets the company recover with interest. Rate base itself is not tagged in any structured filing, so this is the proxy, labeled as what it is.

• Regulatory assets & liabilities $106M / $314M
  Owes ratepayers
  Regulatory assets $106M · regulatory liabilities $314M · net $207M liability position, as filed
  What this means

  The ledger of the regulatory relationship: assets are costs the commission has agreed the utility may collect from ratepayers in future rates, liabilities are amounts it must give back. Both are promises whose worth depends entirely on the commissions that made them — which is why they are shown as filed and never netted into earnings adjustments here.

• What these figures mix —
  Consolidated, not the regulated book alone
  What this means

  This is a holding company whose consolidated figures mix the regulated utility with substantial unregulated businesses, and the filing does not separate the regulated share in structured form. The earned return and the balance-sheet lines above describe the whole enterprise; the segment note in the 10-K is where the regulated book stands alone.

Graham’s defensive tests · 3 of 5 met

Graham’s numerical criteria for the defensive investor (The Intelligent Investor, ch. 14), run on the filings. A floor of safety, not a buy signal; many fine modern businesses fail his strictest liquidity rules by design.

• Adequate size Near
  Revenue ≥ $2B · $1.3B
  What this means

  Big enough to weather a storm. Graham's 1972 floor was ~$100M of sales (≈ $700M today); we use a $2B revenue line as a conservative modern stand-in.

• Strong liquidity —
  Current ratio ≥ 2× (waived for utilities) · exempt
  What this means

  Graham exempted public utilities from this test: their working capital “takes care of itself” through the continuous bond-and-share financing of growth, so a thin current ratio is the industry's structure, not a warning. His substitute test — debt no more than twice book equity — is the next line.

• Conservative debt Pass
  Debt ≤ 2× equity (Graham's utility test) · $1.1B vs $1.9B equity
  What this means

  Graham's own substitution for public utilities: debt not exceeding twice the stock equity at book value, in place of the working-capital tests an industrial faces. A utility finances its plant with bonds by design; the question is whether the borrowing stays inside the equity behind it.

• Earnings stability Pass
  A profit every year (10-yr record) · no losses
  What this means

  Graham wanted earnings in each of the past ten years, the stability a defensive owner leans on.

• Dividend record Near
  Uninterrupted dividends · 9 of 10 yrs
  What this means

  An unbroken dividend was Graham's mark of durability. He wanted twenty years; the filings show about ten, and a single suspension breaks the streak. Non-payers, many fine modern compounders, fall outside his defensive net by design.

• Earnings growth Pass
  Earnings +33% over the record · +302%
  What this means

  At least a third more earnings than a decade ago, averaging three years at each end. Net income (not per-share), so stock splits don't distort it, buybacks and dilution show up in the share-count line instead.

• Moderate price —
  P/E ≤ 15 and P/E × P/B ≤ 22.5 · decided by the price
  What this means

  Graham's valuation gate, the wall he kept between a sound business and a sound investment. Three-year average earnings are $6.92/share (latest year $6.57), the averaged base the calculator's gate runs on, and book value is $44.34/share. Enter a price in “What the price implies” just below for the P/E, P/B, and whether it clears. But this is the rule Buffett outgrew: there's no hard P/E law, and a wonderful business can deserve a far richer multiple if the thesis holds, treat it as the bargain-hunter's floor, not a verdict on the price.

Durability & moat, 2016–2025

Whether the record’s returns held, and what the capital reinvested earned.

• Profitable years 10 of 10
  What this means

  Never lost money over the record, the earnings stability Graham insisted on.

• Return on capital ≥ 15% 1 of 10 yrs
  What this means

  A moat shows up as a high return on invested capital that holds year after year, not one good vintage.

• Operating margin 15% → 28% (3-yr avg ends)
  What this means

  Through the cycle the operating margin widened — about 15% early to 28% lately, median 17% — pricing power intact or improving.

• Reinvestment, incremental ROIC 19%
  What this means

  Every extra dollar the business reinvested came back at a high incremental return — the lens GBM read for a moat that reinvests rather than merely harvests. The record and the 10-K are where you check whether the rate holds.

• Owner earnings growth +14%/yr
  What this means

  Owner earnings grew about 14% a year over the record.

• Worst year 2018 · 14.1% op. margin
  What this means

  Stayed profitable even in its hardest year, the resilience that survives recessions.

• Share count +0.9%/yr
  What this means

  Roughly flat share count, little dilution, little buyback.

• Dividend record rising
  What this means

  Paid and raised the dividend across the record, the continuity Graham prized.