Alliant Energy Corp LNT

Thesis

Alliant Energy (LNT) is a state-regulated electric and gas utility serving roughly one million electric customers through Interstate Power & Light (Iowa) and Wisconsin Power & Light. Like every vertically integrated regulated utility, the underlying compounding engine is simple: deploy capital into a rate base, earn a regulator-set return on equity (typically 9.5-10.0%) on the equity layer of that base, and grow EPS at roughly the rate of rate-base growth less dilution. Buffett describes this as a 'social compact' — put up ever-increasing capital, operate reliably, and earn a fair return [5]. It is one of the most predictable business models Berkshire owns.

The qualitative case is fine. The quantitative case is not. The scorer pegs ROIC at 4.58% (10y avg) and ROIIC at 1.8% over five years — well below regulated peers, suggesting Alliant is investing faster than allowed returns can keep up with, which is the classic dilution-via-equity-issuance pattern. Net debt/EBITDA of 6.35x and interest coverage of only 2.0x sit at the high-risk end of regulated-utility norms. Five-year FCF conversion is -55%, meaning the company has burned cash to fund growth. Reverse-DCF implies the market needs 6.49% perpetual owner-earnings growth to justify today's price.

Intrinsic-value math: the scorecard puts IV-low at $37.82, base at $46.55, and high at $68.64. The current price of $74.06 is 1.59x base IV and exceeds even the high-case IV. There is no margin of safety. The business is fine; the price is wrong. We would become interested below $50 (a roughly 7% discount to base IV) and aggressive below $42.

Moat

Regulated electric and gas utilities like Alliant earn their moat from one source above all: a state-granted franchise to be the sole provider of an essential service in a defined geography, in exchange for accepting price-and-return regulation. Buffett describes the same arrangement at MidAmerican: 'we are expected to put up ever-increasing sums to satisfy the future needs of our customers. If we meanwhile operate reliably and efficiently, we know that we will obtain a fair return on these investments' [5]. That is the entire moat thesis for LNT in one sentence. We will test it against each of the five moat archetypes.

Cost advantages — present, narrow. Alliant's coal-and-wind generation portfolio in Iowa and Wisconsin enjoys the structural advantage every vertical utility has: high fixed-cost generation and transmission assets that a $10 billion challenger could not duplicate without first obtaining regulatory approval and siting rights, which the regulator will not grant if it would strand incumbent assets. Buffett notes that MidAmerican's renewables build (now 7%+ of U.S. wind capacity) exists precisely because the utility can retain all its earnings and reinvest [1]. Alliant is smaller and less self-funded — its aggressive capex program requires regular equity issuance (share count up 1.88% over 10 years), which dilutes the cost-of-capital advantage. NARROW.

Intangibles — the franchise itself. This is the dominant moat. IPL and WPL operate under exclusive service-territory franchises granted by Iowa and Wisconsin. A competitor cannot enter without state approval, and approval is not granted because the regulatory bargain assumes one operator per territory. A $10B challenger with five years cannot pry away a single Cedar Rapids household. Buffett's 'social compact' framing applies directly [5]. The franchise's durability depends on Alliant maintaining regulator goodwill — Buffett emphasized that MidAmerican's #1 customer-satisfaction ranking 'is of great importance as we expand' [1]. We have no comparable ranking for Alliant; our base case assumes adequate but not exceptional regulator relations. WIDE on franchise; NARROW on regulator goodwill.

Switching costs — high, but irrelevant in a monopoly. Customers cannot switch even if they want to, except via on-site solar or behind-the-meter generation, which is a real and growing threat (the 10-Q's risk factors flag 'customer- and third party-owned generation and other non-traditional service models' as a stated risk). NARROW.

Network effects — none meaningful. Transmission has weak scale economies but Alliant does not own its full transmission stack — much is in ATC (American Transmission Company) and ITC Midwest. NONE.

Pricing power — capped by regulators, by design. The regulator caps ROE at the authorized rate (typically 9.5-10.0% in Iowa and Wisconsin). Alliant cannot raise prices to expand margins; it can only earn a fair return on prudent investment. Pricing power is bounded above and protected below — the inverse of a Coca-Cola moat. NARROW BY DESIGN.

Competitor stress test ($10B + 5 years). A well-funded entrant could not enter Alliant's service territory at all. The franchise is the moat. The far more credible threat is a regulator that loses confidence in Alliant — which the 10-Q acknowledges via the 'IPL retail electric base rate moratorium' risk factor and 'recovery of costs of cancelled generation projects' language. Berkshire's MidAmerican is famous for its #1 customer-satisfaction rankings precisely because that is what makes the franchise indestructible [1][5]. Alliant has no comparable disclosed ranking.

Erosion risk. The biggest risk is regulatory: a Iowa Utilities Commission or PSCW that disallows recovery of the AI-data-center capex buildout (10-Q risk factor: 'overbuilt or under-utilized transmission capacity or generation') would cripple owner earnings. Behind-the-meter solar plus large industrial customers self-generating is a slow erosion. Neither is acute today.

Moat verdict: NARROW. The franchise is wide; the financial expression of it (ROIC, ROIIC, interest coverage) is narrow because Alliant is mid-tier within its peer group, not best-in-class. Moat verdict: NARROW.

Management & Capital Allocation

Capital allocation at a regulated utility is mostly forced: 80%+ of operating cash flow goes back into the rate base because that is what the regulator expects in exchange for the franchise. The interesting questions are at the margin: how aggressive is the capex plan vs. allowed return, how much equity must be issued, what is paid in dividends, and how is debt managed.

1. Reinvestment — heavy, low return. Alliant is in the middle of a multi-year, multi-billion-dollar generation transition (coal retirements, solar/wind/storage build, data-center load buildout). The 10-Q's forward-looking statements section enumerates roughly 30 distinct execution risks tied to this capex plan, including 'cost increases,' 'tariffs,' 'antidumping duties,' 'contractor performance,' 'warranty issues,' and the 'ability to obtain siting and environmental permits.' This is large-scale execution, much of it in solar where the One Big Beautiful Bill Act may modify or repeal IRA tax credits mid-build (10-Q forward-looking #6). The 5-year ROIIC of 1.8% is the warning sign — recent dollars invested are not earning anywhere close to cost of equity, which means the rate-base growth is not yet flowing to per-share owner earnings. Some of this is regulatory lag (capex spent today, recovered in tariffs 18-24 months later); some is real.

2. Acquisitions — minimal recent activity. Alliant is not an empire-builder. Good. No grade deduction.

3. Debt — too much. Net debt/EBITDA of 6.35x is at the high end of regulated utility norms (peers run 5.0-6.0x). Interest coverage of 2.0x is genuinely tight — utilities should run 3.0x+. Buffett at MidAmerican specifically called out 9:1 coverage at BNSF and the recession-resistant earnings of MidAmerican's diversified utility footprint as the reasons Berkshire's credit was 'not needed' to backstop them [3]. Alliant has neither the coverage nor the diversification — it is a two-state utility (Iowa, Wisconsin) and so is exposed to two specific commission outcomes.

4. Buybacks — none meaningful. Share count rose 1.88% over 10 years, indicating equity issuance to fund growth capex, not retirement. This is the opposite of compounding through buybacks. Acceptable for a utility in growth mode but worth tracking.

5. Dividends — yes, sustained. Alliant has a long history of dividend growth (typical 5-7% annual). With a payout ratio in the 60-70% range, the dividend is funded but limits reinvestment flexibility. This is the standard utility model and is not deductible.

Communication quality. The 10-Q is workmanlike — clear segment disclosure, comprehensive risk factors, no surprises. No unusual non-GAAP gymnastics. The IRA / OBBBA language in the forward-looking section is appropriately cautious. We have not seen any sign of management stretching to hit guidance, but we also have not seen the kind of trust-building moments Buffett celebrates at MidAmerican (consecutive years of frozen retail prices, J.D. Power-equivalent #1 customer satisfaction, etc. [1][6]).

Compared to the Buffett standard. MidAmerican retained ALL earnings, paid no dividend after 2000, and built itself into the largest U.S. wind owner [6]. Alliant pays a dividend, must issue equity to fund growth, and runs at 2.0x interest coverage. It is a normal utility, not the gold standard.

Capital allocator: B-. Standard regulated-utility execution. No red flags, no fraud, no empire-building. Two yellow flags: thin interest coverage and 1.8% ROIIC. We would upgrade to B+ on a) coverage above 2.5x or b) measurable rate-base ROE realized at or above the authorized level.

Capital allocator: B-.

Industry Structure

Regulated electric utilities sit in one of the most stable industry structures in U.S. capitalism. Porter's Five Forces all bend in the incumbent's favor — by regulatory design.

1. Threat of new entrants — very low. Entry requires a state-issued certificate of public convenience and necessity. Iowa and Wisconsin do not issue parallel franchises. Capital intensity (transmission, generation, distribution) runs to tens of thousands of dollars per customer. A $10B war chest cannot replicate IPL's Cedar Rapids distribution grid. Score: 9/10 (very favorable).

2. Threat of substitutes — rising slowly. Behind-the-meter solar plus storage is the single credible substitute. The 10-Q explicitly flags 'customer- and third party-owned generation and other non-traditional service models' as a structural risk. Today this is ~3-5% of load in the Midwest; in 10 years it could be 15%+. Large industrial / data-center customers contracting directly with merchant solar developers under 'co-located resource arrangements' (also a 10-Q risk factor) is a more acute version of the same threat — a single 200MW data-center customer going behind-the-meter would erase years of rate-base growth. Score: 6/10.

3. Bargaining power of buyers — low for residential, rising for industrial. Residential and small-commercial customers have no leverage; they pay tariffed rates. Large industrial customers (particularly hyperscale data centers) increasingly negotiate bespoke 'individual customer rates' (10-Q risk factor) and can credibly threaten self-generation. Iowa's emerging data-center cluster (driven by cheap wind power and tax incentives) makes this an active issue at IPL. Score: 6/10.

4. Bargaining power of suppliers — moderate, regulated pass-through. Coal, natural gas, purchased power, and increasingly tariffed solar panels and transformers are inputs. Most fuel and purchased-power costs flow through fuel adjustment clauses, so suppliers' pricing power hits customers, not the utility. The recent risk: solar-panel tariffs (10-Q forward-looking #5) and transformer / equipment shortages can cause capex overruns that the regulator may disallow if deemed imprudent. Score: 6/10.

5. Industry rivalry — none within the franchise. IPL and WPL are monopolies in their service territories. They compete only in the capital markets (for cost of debt and equity) and on regulator perception. Score: 9/10.

Value-pool location. The economic value pool of a regulated utility is the equity layer of the rate base times the authorized ROE. Alliant's rate base is growing high-single-digits annually; authorized ROE has been holding around 9.5-10%. The value pool is growing. The risk: hyperscale data-center load is now the marginal driver of rate-base growth. If those customers materialize, Alliant compounds. If they delay, cancel, or self-generate (all named 10-Q risks), the rate base shrinks vs. plan and equity issuance dilutes existing shareholders.

Trajectory. Net positive structurally (electrification + data centers raise demand) but operationally noisy (interest rates, IRA repeal risk, supply-chain tariffs, customer bypass).

Industry Verdict: Good. Not Excellent — Alliant lacks the cost advantages and diversification of MidAmerican's eleven-state footprint [1][3]. Not Average — the franchise economics are still intact and rate-base growth is real. Good.

Inversion (Bear Case)

I am now playing a short-seller. The bull case is that Alliant is a sleepy, government-protected compounder that grows EPS 5-7% with a 3% dividend forever. Here is why that case fails.

1. The single event that kills this — a denied rate case, mid-capex. Alliant is in the middle of a multi-billion-dollar capital program — coal retirements, solar/storage builds, transmission upgrades to support hyperscale data-center load. The 10-Q's first listed risk factor is 'IPL's and WPL's ability to obtain adequate and timely rate relief... including... costs of cancelled generation projects incurred prior to pursuing regulatory approval, as well as costs of generation projects incurred prior to regulatory approval or that exceed initial estimates.' The second risk factor calls out 'the impact of IPL's retail electric base rate moratorium.' If IPL or WPL absorbs even one large prudency disallowance — say, $500M of solar capex deemed unrecoverable because IRA credits were repealed mid-build (10-Q forward-looking #6, the One Big Beautiful Bill Act risk) — that flows directly to equity. With only $7.4B of book equity and 2.0x interest coverage, a $500M write-down is a 7% equity hit on a fragile balance sheet. The stock could lose 25% in a week.

2. Why the moat is narrower than bulls think. Bulls assume the franchise is permanent. Two slow-burn leaks: (a) hyperscale data-center customers increasingly demand 'individual customer rates' (10-Q risk factor) and 'co-located resource arrangements' that bypass the utility rate base — if Microsoft signs a 24/7 PPA directly with a merchant solar developer next door to its Iowa data center, Alliant earns the transmission tariff but not the rate-base ROE on the generation. (b) Behind-the-meter solar adoption among Alliant's commercial customers is accelerating; the 10-Q explicitly calls out 'customer- and third party-owned generation and other non-traditional service models, including alternative electric suppliers and potential policy changes... that may enable large customers to source behind-the-meter generation directly from third parties.' Both leaks shrink the addressable rate base. The moat is intact in form but eroding in substance.

3. Why management is worse than it appears. ROIIC of 1.8% over five years means the most recent dollar of capital invested earned 1.8 cents — far below the 9.5-10% allowed ROE on the equity portion. Management blames regulatory lag. The bear says: this is permanent value destruction. Capex above allowed returns plus equity issuance to fund the gap (share count up 1.88% over 10 years) means existing shareholders are funding growth that flows mostly to customers and bondholders, not equity. Interest coverage of 2.0x is dangerously thin. Buffett's BNSF runs 9:1 [3]. Alliant is one rate-case denial away from credit-rating action, which would raise its cost of debt and squeeze coverage further — a doom loop.

4. What bulls are extrapolating that won't hold. Bulls extrapolate (a) 6-7% rate-base growth, (b) 9.5-10% allowed ROE realized in full, and (c) 5-7% EPS growth. Each one is a guess. (a) depends on data-center load that the 10-Q itself flags as cancellable: 'the impact of large load growth customers altering, delaying or cancelling planned facilities, including any resulting impacts of overbuilt or under-utilized transmission capacity or generation and energy storage assets.' (b) depends on commissioners not facing voter backlash over bills — Iowa residential rates have already risen sharply post-2022. (c) depends on (a) and (b) and on equity issuance staying modest, which it won't if interest coverage stays at 2.0x. Reverse-DCF implied growth of 6.49% is what the price needs; achieved 5y owner-earnings growth has lagged this.

5. Valuation trap — multiple compression on a duration asset. P/E TTM is 25.57x vs. 22.74x 10-year average and a regulated-utility long-run norm closer to 17-19x. The 12% premium to LNT's own history exists because the market re-rated utilities up during the 2020-21 zero-rate era and has not fully de-rated. If the 10-year Treasury yield stays above 4% and Alliant's owner-earnings growth disappoints (say, 3-4% instead of 6.5%), a re-rating to 18x on stalled earnings is a 35-40% drawdown. The scorecard's intrinsic-value range — IV-low $37.82, base $46.55, high $68.64 — captures this. Even the high case is below today's $74.06.

Putting it together. A regulated utility is supposed to be safe. Alliant is the worst kind of regulated utility — high leverage (6.35x net debt/EBITDA), thin coverage (2.0x), low ROIIC (1.8%), exposed to two specific state commissions, mid-build on a tariff-exposed solar program, and trading 59% above base IV. The bull is buying a fixed-income substitute at an equity price.

If I am right, the stock could be worth $45 within 3 years.

Lollapalooza Bias Check

Walking through Munger's bias inventory as the analyst who just wrote the above:

Authority bias — active. I leaned heavily on Buffett's MidAmerican letters [1][3][5][6] as a model for how a regulated utility should behave, then implicitly graded Alliant against the Buffett standard. That is fair as a benchmark but unfair as an absolute test — most utilities are not MidAmerican, and the market does not require them to be MidAmerican to earn a fair return. I should hold this in mind: Alliant being merely 'normal' is consistent with a fair-but-not-cheap valuation, not necessarily an avoid.

Confirmation bias — active. The scorecard handed me a composite score of 50 and a px/IV ratio of 1.59. I then went hunting in the 10-Q risk factors for evidence the price is wrong, and found plenty (data-center risk, IRA repeal risk, base-rate moratorium). I did not equally hunt for evidence the price is right (pending favorable rate orders, accelerating data-center commitments, peer multiples). The bear case in the inversion is genuine but I am pre-disposed to believe it.

Anchoring — active. The IV-base of $46.55 anchored the entire valuation discussion. That number is the output of a maintenance-capex assumption that the scorer itself flagged as 'uncertain (>50% spread).' If maintenance capex is materially lower than assumed, owner earnings rise and IV rises with them. I should weight the IV-high of $68.64 more than my prose did.

Recency bias — active. Interest rates rose sharply 2022-24 and utilities de-rated. I am pattern-matching on that recent regime. If rates fall, utilities re-rate up and a 25x multiple may look reasonable.

Deprival super-reaction — not active. I do not own this stock and have nothing to lose by passing.

Social proof — mildly active. Utility consensus is broadly cautious post-2022; I am with the consensus, which is comfortable but not necessarily right.

Net. My biases all point the same direction (bearish). That is itself a warning. The honest calibration is: the math says the price is high, the qualitative business is fine, and a patient buyer at $50 or below has a clear margin of safety. Above $70, every bias I just listed is reinforcing every other bias to make me bearish — classic Munger lollapalooza but in reverse, and worth flagging.

10-Year Outlook

Same fundamental business model in 10 years? Yes. Alliant in 2036 will still be a regulated electric and gas utility in Iowa and Wisconsin, earning a regulator-set return on a rate base. The product (electrons and therms) and the bargain ('we put up capital, you let us earn a fair return' [5]) will be unchanged.

Customer base larger? Probably modestly. Population growth in the Iowa/Wisconsin service territories is 0-0.5% annually. The wildcard is hyperscale data-center load — a single 500MW AI campus equals roughly 1% of system peak. If the data-center boom materializes in Iowa as the state hopes, sales volumes could grow 2-4% annually for a decade. If it does not, 0-1%.

Profit per customer higher? Likely yes in nominal dollars (rate-base growth + inflation + tariff increases) but flat-to-slightly-down in real terms after equity dilution. The structural ceiling is the authorized ROE, which has been drifting down across U.S. utilities for 30 years.

Moat wider? No. The franchise is at most stable; behind-the-meter solar and large-customer co-location are slow leaks. The moat is more likely narrower in 2036 than today.

Single biggest threat. A combination of (a) IRA tax credits being modified or repealed mid-capex (10-Q risk factor), (b) hyperscale customers cancelling or self-generating, and (c) a rate commission that disallows recovery of stranded solar/wind. Any one is survivable; two together would be a real impairment to owner earnings.

Confidence that this business will be recognizable, profitable, and shareholder-friendly in 2036. The business will exist and be profitable. Whether per-share owner earnings compound at the 6.49% reverse-DCF-implied rate is much less certain — that requires execution that the 1.8% five-year ROIIC has not yet demonstrated. The franchise is high-confidence. The compounding rate is medium-confidence.

CONFIDENCE: medium