Utilities — NAICS 22 (sector)

A rollup investor primer for public-market and private investors

NAICS = North American Industry Classification System, the U.S. government's standard for grouping businesses by activity. NAICS 22 is a sector (2-digit) — the broadest tier of the taxonomy. It contains exactly one subsector, 221 Utilities, so at this level the sector and the subsector are the same thing. This is a short pass-through note: it gives sector 22's own ground-truth federal statistics, explains why they are identical to the 221 figures, and points you to the child primer (221) for the full detail on the three utility businesses inside — electricity, gas, and water. Core business statistics (revenue, firms, establishments, employment, payroll, concentration) are our authoritative ingested U.S. Census figures; everything else is drawn from the child primer's cited sources.

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1. Overview

NAICS 22 is "utilities" as the federal statistical system defines it at the top level: every networked service delivered to a building through a wire or a pipe — electricity, natural gas, water, sewer, and district heating and cooling. It is one of roughly twenty sectors in the classification, and it is unusually clean: it maps one-to-one onto a single subsector, 221. There is no other subsector to blend in, so the sector figures and the 221 figures are the same numbers [1][2].

That means everything an investor needs to understand about this sector lives in the 221 primer. The one-line summary of that primer: "utilities" is not one asset but three on different trajectories — a re-accelerating electric-power business (~74% of counted revenue), a stable-but-fused natural-gas-distribution business (~24%), and a small, defensive, government-heavy water and sewage business (~3%) — all sharing the same regulated-toll-road economics: the owner earns an approved return on the capital it sinks into its network, which makes most of these companies bond-like rather than commodity bets [child 221].

Because sector 22 adds no information beyond 221, this note stays short. Read it for the sector's ground-truth size and the one structural caveat that governs it; read primer 221 for the investable universe, economics, demand drivers, regulation, consolidation, and risks in full.

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2. What's inside — the one child, and why the sector equals it

NAICS 22 contains a single subsector:

There is nothing else in the sector, so the rollup is not an average of several children — it is a single child reported one tier up. The detail, the internal contrasts, and the three-way split all sit one level down, inside 221 and its three industry groups. At the 2-digit tier there is no reconciliation to do and no aggregation effect to unwind: the sector's revenue, firm count, establishments, employment, and payroll are simply 221's figures [1][2].

The practical takeaway: if you have read primer 221, you have read the substance of sector 22. The value of the 2-digit tier is only that it is the entry point in the taxonomy — the label a top-down allocator sees before drilling in.

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3. Size — the sector's ground-truth figures

Our authoritative Census figures for NAICS 22 (the counted, private-sector sector) — identical to 221:

CR4/8/20/50 = the combined revenue share of the largest 4, 8, 20, and 50 firms. HHI = Herfindahl-Hirschman Index, a 0–10,000 concentration gauge; U.S. antitrust agencies treat anything below 1,500 as "unconcentrated."

Two caveats carry over from the child primer, and they matter as much here.

1. The government undercount is the single most important structural fact about this sector. Census business surveys generally exclude government-owned establishments [3]. That is a large omission in utilities and an uneven one: government, municipal, and cooperative owners are a minority of electricity and gas but the majority owner of water (~84%) and sewage (~98%) [child 221]. So the $765.95 billion is best read as the private-sector baseline, not the size of the underlying service. There is no official consolidated total that adds government utilities back in — treat that number as not available rather than estimating it.

2. Receipts are not value added. The figure is the correct sum of receipts, but it double-counts commodities (wholesale power, resold gas) that pass through more than one layer [child 221]. It is right as reported; just don't read it as the sector's economic size — the true value added is smaller and sits in the networks and generating margins, not in the pass-through cost of fuel.

For the sector's real physical scale — roughly 1,230 gigawatts (GW; 1 GW = 1,000 megawatts) of electric capacity, ~2.4 million miles of gas distribution pipe, and hundreds of billions of dollars of water and wastewater assets — see primer 221 §3, where those inventories (a more honest gauge than receipts) are laid out with sources [child 221].

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4. The investable universe (summary — see 221 for the full roster)

Two facts govern the whole sector. First, there is no pure-play public stock for it, and even one tier down the listed names are mostly diversified multi-utility holding companies. Second, a large share of the asset base is not listed at all — it sits with federal agencies, public-power authorities, cooperatives, municipalities, and private infrastructure funds, reachable only through debt or the equipment-and-services supply chain [child 221].

Where public-market value concentrates, in brief: regulated and diversified electric utilities and merchant power producers (the ~74% electric core), listed gas-distribution "pure plays" and the larger gas rate base inside diversified parents (the ~24% middle), and a short roster of regulated water utilities (the ~3% tail). Broad utility exchange-traded funds (ETFs) such as XLU hold all three mixed together; there is no ETF for the sector or any single child. The full company lists, tickers, and the private/government owners are in primer 221 §4 [child 221].

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5. How the money works (summary)

One engine runs the whole sector: rate base × allowed return. Wherever an asset sits inside a regulated investor-owned utility, an economic regulator (usually a state public utility commission, PUC) approves a revenue requirement built on the utility's invested capital times an allowed return on equity (ROE) — recently clustering near 9.5–10% across all three utility types. The growth algorithm is therefore identical everywhere: build more approved plant, pipe, or wire → grow rate base → grow earnings [child 221].

The one place the model diverges is electric generation, which adds a competitive/merchant layer that sells power into wholesale markets and carries all of the sector's real commodity volatility and most of its policy-driven upside. Gas distribution passes the fuel molecule straight through at cost; water has no commodity at all. Because the model is capital-in, return-on-capital-out, the whole sector is interest-rate-sensitive in one direction at once — which is why utilities of every kind trade as "bond proxies." Full detail in primer 221 §5 [child 221].

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6. Demand drivers (summary)

Two forces lift the whole sector; a third splits its members apart. (1) Aging infrastructure and mandated replacement — a decades-long capital cycle in grids, gas mains, and water/sewer pipes that continues regardless of demand growth. (2) The electricity demand inflection — after ~15 years of flat load, U.S. electricity demand is rising on data centers and artificial intelligence (AI), broad electrification, and factory reshoring; because electricity is ~74% of the sector, this single driver dominates the group's growth. (3) Electrification is the divider — a tailwind for the electric child and a headwind for the gas child, moving heating load off the gas main and onto the wire. See primer 221 §6 for the figures behind each [child 221].

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7. Regulation (summary)

Regulation is the business model. Every part of the sector answers to a state PUC on rate-and-return terms; electricity and gas add a federal wholesale/interstate regulator (the Federal Energy Regulatory Commission, FERC); and each utility type bolts on its own safety-and-environmental agency (the Nuclear Regulatory Commission and Environmental Protection Agency (EPA) for power; the Pipeline and Hazardous Materials Safety Administration and EPA for gas; the EPA under the Safe Drinking Water and Clean Water Acts for water and sewage) whose mandates create the very capital spending the utility earns a return on. Electricity is the most heavily and variably regulated. Full breakdown in primer 221 §7 [child 221].

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8. Consolidation (summary)

The sector is fragmented nationally (HHI 147.7) but consolidating within each utility type [1] — merchant-power scale-ups and infrastructure-fund buyouts in electricity, a rotation of gas systems from electric-focused parents to gas specialists and funds, and a roll-up of thousands of small municipal water and sewage systems by listed water utilities. The common buyer across all three is infrastructure capital, and the diversified parents are actively reshaping which service lines they own. See primer 221 §8 [child 221].

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9. Risks (summary)

Shared across the sector: interest rates (capital is the business, so higher rates compress every valuation at once), affordability backlash against record capital spending, regulatory lag and cost disallowance, and cyber/supply-chain exposure. Concentrated by utility type: commodity/merchant volatility, a 2026–27 wind/solar tax-credit cliff, and wildfire liability in electricity; electrification and stranded-asset risk in gas; and PFAS ("forever chemicals"), lead, and merger-execution risk in water. The unifying lens: because ~74% of the sector is electricity, the single variable that matters most for NAICS 22 as a whole is whether the electricity demand inflection lands near consensus. Full risk register in primer 221 §9 [child 221].

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10. How to invest & outlook

Because sector 22 is subsector 221, the investment framing is identical — and it is a framing about un-blending, not blending. Read the sector as three risk profiles, not one "utilities" bloc: electric power is how you own the demand inflection (most torque, most commodity-and-policy risk); gas distribution is how you own steady regulated income (with an electrification fuse whose length depends on the state); and water is how you own the most defensive, mandate-driven compounding (with the least to buy directly). A broad utility fund collapses all three into a single yield; this taxonomy tier exists so you can take them apart [child 221].

Outlook. After a lost decade of flat electricity demand, U.S. utilities have moved from managed maturity to a capital-led expansion — investor-owned electric utilities alone plan more than $1.1 trillion of capital spending across 2025–2029 [4], with parallel mandated cycles in gas safety and water replacement. Public-market investors choose a profile (regulated/diversified utilities, merchant power, renewable platforms, gas pure plays, water pure plays, or the equipment-and-services suppliers). Private investors buy the assets the way the industry is actually owned — whole regulated utilities, project equity, and the tax-exempt municipal and cooperative bonds that are the only route into the government-owned majority of water, sewage, and public power. The full menu, ticker by ticker, is in primer 221 §10 [child 221].

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Sources

1. U.S. Census Bureau, 2022 Economic Census — Summary Statistics and Concentration Ratios, NAICS 22 / 221 (Utilities) (receipts $765,952,367 thousand; 7,314 firms; CR4 14.7% / CR8 25.4% / CR20 48.0% / CR50 70.6%; HHI 147.7). Histometrics ingested ground-truth statistics; sector 22 equals subsector 221 because 221 is the only subsector in the sector. https://data.census.gov/table/ECNBASIC2022.EC2200BASIC
2. U.S. Census Bureau, 2023 County Business Patterns, NAICS 221 (20,379 establishments; 667,277 employees; annual payroll $84,904,374 thousand; first-quarter payroll $25,853,514 thousand). Histometrics ingested ground-truth statistics. https://www.census.gov/programs-surveys/cbp.html
3. U.S. Census Bureau, Understanding NAICS and Economic Census Coverage (government-owned establishments generally excluded from business statistics), 2022. https://www.census.gov/programs-surveys/economic-census/year/2022/guidance/understanding-naics.html
4. Edison Electric Institute (EEI), Industry Capital Expenditures / 2024 Financial Review (>$1.1 trillion planned investor-owned-utility capital spending, 2025–2029). https://www.eei.org/resources-and-media/industry-data
5. Child primer 221 — Utilities (subsector), Histometrics — the full detail on the three utility businesses (2211 electric power, 2212 natural gas distribution, 2213 water, sewage & other systems): investable universe, economics, demand drivers, regulation, consolidation, and risks, with its own primary sources (EIA, EPA, DOE, NERC, FERC, PJM, IRS, company filings). Histometrics.

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Prepared July 2026. This is a single-child pass-through note: NAICS sector 22 contains only subsector 221, so the core business statistics (receipts, firms, establishments, employment, payroll, concentration) are identical at both tiers and are Histometrics-ingested U.S. Census figures that take precedence over third-party estimates. Federal business statistics undercount this sector wherever government, municipal, or cooperative ownership dominates — a minority of electricity and gas, a large majority of water and sewage — so the $765.95 billion is the private-sector baseline, not the size of the underlying service; and because receipts embed commodity costs that pass through more than one layer, that total is receipts as reported, not the sector's value added. Both points are stated rather than estimated around. For everything below the top-level statistics, see child primer 221. Forward-looking statements in §10 are analytical judgments, not guarantees.