Securities and Commodity Exchanges (U.S.) — NAICS 523210

1. Overview

A securities or commodity exchange runs the marketplace where other people's stocks, options, bonds, and futures contracts change hands. The exchange itself does not own, trade, or set the prices of what trades on it — it operates the "matching engine" that pairs buyers with sellers, publishes the resulting prices, and (increasingly) clears and settles the trades. Think of it as the toll road, not the traffic. NAICS (North American Industry Classification System) code 523210 covers exactly this activity in the United States.[4]

This is financial-market infrastructure, not an ownership claim on the assets that trade. It is also one of the highest-margin, most defensible corners of finance: a handful of operators run the plumbing of American capital markets, earn a small fee on enormous transaction volume, and layer recurring data, listing, and technology revenue on top. The result is durable, cash-generative businesses with strong competitive moats — but ones exposed to trading volumes, regulation, technology failure, and concentrated customer power.

Public and private ways in. The public route is unusually clean: the major U.S. exchange operators — Intercontinental Exchange, CME Group, Nasdaq, and Cboe Global Markets — are all large, listed companies you can buy directly, and Miami International Holdings joined them in a 2025 initial public offering (IPO).[16][20] The private side is narrower and more specialized: member-owned or venture-backed venues (MEMX, IEX, the new Texas Stock Exchange), industry-owned clearing utilities (the Options Clearing Corporation, the Depository Trust & Clearing Corporation), and Commodity Futures Trading Commission-regulated event/prediction markets. Private stakes are less liquid and often hinge on regulatory approval, member adoption, and an eventual sale or listing.

2. What it is and how it's structured

An exchange typically performs several linked functions:

• Execution — matching buyers and sellers.
• Listing — giving companies or products a venue and rulebook for public trading.
• Clearing — managing post-trade obligations, often through an affiliated central counterparty.
• Data — selling real-time, historical, reference, index, and analytical information.
• Access — connectivity, co-location, order-routing, and market technology.

The industry spans both cash markets (equities, bonds, options) and derivatives (futures and options linked to interest rates, foreign exchange, energy, agriculture, metals, and equity indexes).

In scope (523210): establishments that furnish a physical or electronic marketplace to facilitate buying and selling of stocks, stock options, bonds, or commodity contracts. Critically, these firms "do not buy, sell, own, or set the prices" of what trades — they operate the venue.[4]

Excluded adjacent activities (the neighbors):

• Brokers and dealers — the firms that actually buy, sell, and make markets in securities and commodities for customers — sit in NAICS 523150 (Investment Banking and Securities Intermediation) and 523160 (Commodity Contracts Intermediation). This is where Charles Schwab, Interactive Brokers, and market-making wholesalers like Citadel Securities and Virtu live — not here.[4]
• Clearinghouses that guarantee and settle trades are classified under NAICS 523999 (Miscellaneous Financial Investment Activities), even though the big exchange groups own their own clearinghouses.[4]
• Portfolio management, investment advice, and trust/custody sit elsewhere in Subsectors 523/525.[4]

Note that an excluded business can still compete with an exchange economically: an alternative trading system (ATS) can attract order flow without being a registered national securities exchange.

Ownership mix. Three structural facts define the industry. (1) It is demutualized and for-profit — venues once owned by their members as nonprofits (NYSE, Nasdaq, CME, Cboe) converted to shareholder-owned public companies over the past two decades. (2) It is vertically integrated — the leaders own the trade (matching), the clearing (settlement/risk), and the data (price feeds), and sell all three. (3) A member-owned/mutual layer survived alongside the for-profits, mainly in clearing utilities (the Options Clearing Corporation, the Depository Trust & Clearing Corporation) and in newer broker-backed venues such as MEMX.[22]

3. How big it is (federal figures)

The narrowly defined federal industry is tiny in headcount and physical footprint — because a modern exchange is software, not a trading floor. County Business Patterns (CBP) covers establishments with paid employees and reports employment and payroll; the Economic Census reports firms, receipts, and concentration.

Read the concentration. A CR4 (combined revenue share of the four largest firms) of 95.1% and an HHI (a standard concentration index) of 2,434.7 make this one of the most concentrated industries in the entire economy — an HHI above 1,800 is deemed "highly concentrated" for merger analysis under the U.S. antitrust guidelines.[25] Seventeen firms; four of them are effectively the market.[2]

The undercount works in reverse here. For most industries, federal statistics miss tiny or informal operators. Here the opposite distortion applies: the $16.5 billion receipts figure understates the exchange operators' economic footprint. The four dominant U.S. groups booked roughly $22 billion in combined 2024 revenue between them[5][7][8][9] — more than the entire federal industry line — because most of what they earn (data services, clearing, mortgage software, index licensing, and non-U.S. operations) is classified in other NAICS codes or earned abroad, outside the narrow 523210 definition. Note too what the supplied federal extract does not provide: national trading volume, average daily volume, revenue per contract, profit, or venue-level market share. So 523210 is genuinely small as a standalone marketplace-operating activity, but the companies that dominate it are megacaps once you count everything they do.

4. The investable universe

Public companies

The public side is a short, high-quality list. These operators are the industry:

Adjacent public name. OTC Markets Group (OTCM) operates over-the-counter (OTC) trading systems, market-data products, and issuer services; its OTC Link systems are ATSs, not national securities exchanges, so it is adjacent to — not inside — 523210.[21] Investors also often group in electronic fixed-income venues MarketAxess (MKTX) and Tradeweb (TW) and the crypto exchange Coinbase (COIN), all of which are brokers/platforms classified outside this code. Foreign-listed operators — London Stock Exchange Group, Deutsche Börse, Hong Kong Exchanges, Japan Exchange Group, Euronext, and B3 (Brazil) — are the international peer set.

None of these are pure-play exposures: ICE, Nasdaq, Cboe, and MIAX all include businesses beyond the precise NAICS code, while CME is the most derivatives- and clearing-focused of the group.

Major private owners and challengers

The clearing and settlement backbone is industry-owned and not directly investable — the Options Clearing Corporation (OCC) for listed options and the Depository Trust & Clearing Corporation (DTCC) for equities. Private or member-owned venues include:

• IEX Group, Inc., privately held, which owns 100% of the Investors Exchange (IEX).[23]
• MEMX Holdings LLC, which operates member-owned equity and options exchanges; its founding members included major banks, retail brokers, market makers, and asset managers.[22]
• TXSE Group Inc., parent of the Texas Stock Exchange (TXSE), SEC-approved as a national securities exchange in September 2025 and backed by BlackRock, Citadel Securities, Charles Schwab, and J.P. Morgan, among others; it raised $250 million in a second funding round.[13][24]
• 24X National Exchange, focused on near-round-the-clock trading, plus CFTC-regulated prediction/event markets (e.g., Kalshi) as a fast-growing adjacency.[14]

Private-ownership disclosure is uneven across these venues; named backers should not be read as controlling ownership stakes.

5. How the money works

Exchange economics rest on a simple, powerful structure: charge a tiny fee on a very large number of transactions, on top of a fixed-cost technology platform.

The two revenue engines:

• Transaction and clearing fees (volume-driven). The core equation is average daily volume (ADV) × the fee captured per contract or per share, net of any rebates paid to attract order flow. CME Group, for example, averaged a record 26.9 million contracts per day in 2024.[6] Because the marginal cost of matching one more trade is near zero, this revenue is cyclical (it rises with volatility and activity) but extraordinarily high-margin.
• Recurring, subscription-like revenue (activity-agnostic). Market-data feeds; connectivity and co-location (renting rack space next to the matching engine for speed); index licensing; company listing fees (initial IPO fees plus annual fees scaled to market value); and, increasingly, software and analytics sold as a service. Data alone typically runs 15–30% of a major exchange's revenue.[17] Investors prize this recurring mix because it holds up when trading volume falls.

Why margins are so high — operating leverage. The costs are almost all fixed or semi-fixed (data centers, matching engines, cybersecurity, compliance, and regulatory capital). Once built, each additional trade drops nearly straight to profit, which is why these firms routinely post 50%+ adjusted operating margins. CME turned $6.1 billion of 2024 revenue into $3.5 billion of net income — a ~57% net margin.[5] The flip side is earnings pressure when volumes decline.

The moat — liquidity begets liquidity. Traders go where other traders already are, because that is where they get filled at the best price. That network effect makes an incumbent's order book self-reinforcing and hard to dislodge, especially in listed derivatives, where CME (rates) and Cboe (index options) enjoy near-exclusive franchises around their flagship products.

Float and interest income. Clearinghouses hold member margin and collateral; on large cash balances, the operator earns interest income — a quiet tailwind when rates are high, offset by the financial and operational obligations that owning a clearinghouse creates.

Metrics investors actually watch: ADV, rate per contract (RPC) or capture rate, the split between recurring and transaction revenue, organic revenue growth, operating margin, and capital returned via buybacks and dividends.

6. What drives demand

• Trading volume and volatility. The single biggest swing factor. Market turbulence, macro uncertainty, and shifting interest-rate expectations push hedging and trading activity — and therefore fees — up; calm, trendless markets are the enemy. Severe stress can cut both ways, boosting volume but also draining liquidity and raising clearing risk.
• Risk transfer. Investors, companies, banks, and commodity producers use futures and options to hedge rates, currencies, energy, agricultural products, metals, and equity exposures. Rate-hedging is the core of CME's franchise; energy price swings drive ICE's futures; equity volatility drives Cboe's VIX/SPX complex.
• Options adoption. Cboe reported 4.6 billion contracts across its U.S. options exchanges in 2025, with 59% of S&P 500 Index options volume in zero-days-to-expiry ("0DTE") options.[18] These are reported facts, not a guarantee of continued growth.
• New issuance and capital formation. IPO activity, secondary listings, and exchange-traded fund (ETF) launches feed listing fees and secondary trading. A cold IPO market is a headwind for Nasdaq and NYSE; the growth of private capital can also delay or replace public listings, making private-market liquidity a competitive alternative.[8]
• Financialization and new asset classes. Growth of retail options, ETFs, crypto, and event/prediction markets expands the addressable pool of things to trade.
• Demand for data and connectivity. Faster trading, algorithmic strategies, risk controls, and regulatory reporting make every trading firm, index fund, and risk system a paying consumer of exchange data — a secular, volume-independent growth driver.
• Longer trading hours and new products. Nasdaq has announced a plan for a 23-hour trading day, five days a week, in the second half of 2026, subject to regulatory approval;[8] Cboe has flagged extended hours, new derivatives, prediction markets, and digital-asset infrastructure as areas of interest.[9] These are company plans, not established forecasts.

7. Regulation

Exchanges are among the most heavily regulated businesses in America — and they are also regulators themselves.

• Securities side — SEC. National securities (stock and options) exchanges register with the Securities and Exchange Commission (SEC) on Form 1 under the Securities Exchange Act of 1934; there are currently 24 registered national securities exchanges.[10] Each is a Self-Regulatory Organization (SRO) — legally obligated to write and enforce trading rules, maintain listing standards, run surveillance and disciplinary systems, and file rule changes for SEC review. U.S. equity market structure is governed by Regulation NMS (National Market System), under which multiple venues compete for orders in the same securities; it dictates order routing, price protection, and — after a 2024 SEC overhaul — tick sizes, access-fee caps, and round-lot definitions.
• Commodity/futures side — CFTC. Futures and commodity-options venues register with the Commodity Futures Trading Commission (CFTC) as Designated Contract Markets (DCMs) under the Commodity Exchange Act and must satisfy statutory Core Principles on an ongoing basis. A Derivatives Clearing Organization (DCO) provides clearing, settlement, netting, and mutualized credit-risk services and must meet CFTC requirements.[12] The CFTC also now oversees the emerging category of event/prediction markets.
• Clearing and settlement. Post-trade guarantee and settlement runs through systemically important utilities — the OCC for listed options and the DTCC for equities — supervised as critical financial-market infrastructure.
• Antitrust and market-data oversight. Because the industry is so concentrated, mergers draw Department of Justice / FTC scrutiny, and the SEC periodically challenges the fees exchanges charge for market data and connectivity, as well as access fees, rebates, and conflicts between exchange owners and their customers.[2][25]

8. Competitive dynamics and consolidation

A history of roll-ups. The modern landscape was built by acquisition. Intercontinental Exchange — itself founded in 2000 as an electronic energy marketplace — acquired the New York Stock Exchange in 2013; Cboe bought Bats Global Markets in 2017 for about $3.2 billion to enter equities and expand internationally; Nasdaq and CME grew the same way.[15] Scale, product breadth, and global reach are the stated logic every time.

Diversification away from pure trading. The strategic story of the last decade is exchanges buying their way out of volume-dependent trading fees and into recurring data and software revenue. ICE is the clearest case: of its $9.3 billion in 2024 revenue, its Exchanges segment produced ~$5.0 billion, Fixed Income and Data Services ~$2.3 billion, and Mortgage Technology ~$2.0 billion — meaning nearly half of ICE is no longer an "exchange" in the 523210 sense at all.[7] Nasdaq has pushed hard into financial-technology and anti-financial-crime software.

Fragmentation at the venue level. Paradoxically, while the operators are consolidated into a few families, the number of venues keeps growing — 24 registered securities exchanges plus roughly 16–18 options exchanges, many run in clusters by the same parent (Nasdaq, Cboe, and MIAX each operate several).[10][11] A large share of U.S. equity trading also happens off-exchange in broker-run dark pools and via wholesalers paid through payment for order flow (PFOF) — a persistent drain on the lit exchanges' share.

A wave of new entrants. After decades without a genuinely new stock exchange, the SEC approved the Texas Stock Exchange in 2025,[13] and 24X, MEMX's second exchange (MX2), the Green Impact Exchange, and MIAX Sapphire have all launched or been approved recently.[14] New venues compete on lower fees, different maker-taker pricing, longer hours, issuer-friendly listing rules, or member ownership — but each must attract brokers, market makers, issuers, and data customers simultaneously. Whether any can overcome the incumbents' liquidity network effect is the open question; on balance, consolidation is likelier to continue through acquisitions, partnerships, and vertical integration than through wholesale replacement of the benchmark venues.

9. Risks

• Volume cyclicality. Transaction revenue rises and falls with volatility and activity; a prolonged quiet market compresses the most profitable line, and falling asset prices can weaken listings and issuer activity. Diversification into recurring data/software is partly a hedge against exactly this.
• Fee compression and competition. Especially in cash equities, where new entrants and off-exchange venues pressure capture rates and can force lower fees or higher rebates.
• Regulatory and political. Financial-transaction-tax proposals resurface periodically and would tax the product directly; SEC challenges to market-data and connectivity fees threaten a high-margin revenue stream; market-structure rule changes (tick sizes, access fees, PFOF restrictions) reshape economics.
• Concentration on a few flagship products. CME's rates franchise and Cboe's index-options complex are enormously profitable but concentrated; loss of a key product's liquidity, or a credible competitor, would matter.
• Technology and cyber risk. Outages, latency failures, cyberattacks, bad data, and botched software rollouts are existential for a business whose entire value proposition is reliable, continuous price discovery.
• Systemic/clearinghouse risk. Owning the clearinghouse concentrates counterparty risk; a member default in extreme conditions is a low-probability, high-severity tail.[12]
• Disintermediation. ATSs, broker internalization, bilateral OTC trading, private markets, blockchain-based venues, and foreign exchanges can all divert activity.
• Customer concentration and conflicts. Large banks, brokers, and market makers hold bargaining power — and may also own or back competing venues.

10. How to invest and the outlook

Public routes. The direct, liquid way in is the common stock of the listed operators — ICE, CME, NDAQ, CBOE, and now smaller MIAX — each a distinct bet: ICE on diversification into data and mortgage software, CME on interest-rate and commodity derivatives, Nasdaq on listings plus financial-technology software, Cboe on options and volatility products, MIAX on a newer multi-venue platform.[16] They are prized as capital-return compounders — high margins, strong free cash flow, steady dividends and buybacks. Investors seeking diversified exposure can use financial-sector or "capital markets" ETFs that hold the group, or add international operators (LSEG, Deutsche Börse, HKEX, Japan Exchange Group). Beyond the share price, the comparison worth making runs on: transaction-revenue sensitivity to volume and volatility; net revenue capture per share or contract; the size of recurring data/listings/index/technology revenue; clearing exposure and default resources; technology and cyber resilience; regulatory proposals and litigation; and acquisition discipline, leverage, and capital returns.

Private routes. Direct private exposure is limited and specialized: pre-IPO stakes in new venues (TXSE and 24X are privately funded), participation in member/consortium structures (MEMX), or venture bets on CFTC-regulated event-market platforms. The clearing utilities (OCC, DTCC) are industry-owned and not investable. Private diligence should center on regulatory status, member commitments, the liquidity ramp, pricing strategy, listing pipeline, operating resilience, required capital, and exit options; these stakes can stay illiquid for years.

Near-term drivers to watch (forward-looking). (1) Whether elevated interest-rate and geopolitical volatility keeps derivatives volumes near record levels — the swing factor for CME and ICE. (2) The pace of the shift toward recurring data/software revenue, which the market rewards with higher valuation multiples than transaction fees. (3) Whether new entrants (Texas Stock Exchange, 24X, MEMX MX2) and extended-hours trading meaningfully fragment liquidity or fizzle against incumbents' network effects. (4) SEC and CFTC rulemaking on market-data fees, equity market structure, and the fast-expanding prediction-market category. The base case is durable but selective growth: the incumbents enter this period concentrated, cash-rich, and increasingly diversified, but the combination of new competition and active regulators makes the equity-trading end of the business the most contested it has been in years — and a good industry does not make every venue a good investment. These are judgments about direction, not guarantees.

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Sources

1. U.S. Census Bureau. "County Business Patterns 2023 — NAICS 523210 (Securities and Commodity Exchanges)." (Establishments, employment, first-quarter and annual payroll; Histometrics ingested federal statistics.) https://www.census.gov/data/datasets/2023/econ/cbp/2023-cbp.html
2. U.S. Census Bureau. "2022 Economic Census — Establishment and Firm Size / Concentration Statistics, NAICS 523210." (Firms, receipts, CR4/CR8/CR20/CR50, HHI; Histometrics ingested federal statistics.) https://www.census.gov/programs-surveys/economic-census.html
3. U.S. Small Business Administration. "Table of Small Business Size Standards Matched to NAICS Codes." 2023. https://www.sba.gov/document/support-table-size-standards
4. U.S. Census Bureau. "2022 NAICS Definition — 523210 Securities and Commodity Exchanges." 2022. https://www.census.gov/naics/?input=523210&year=2022
5. CME Group Inc. "CME Group Reports All-Time Record Annual Revenue, Adjusted Operating Income, Adjusted Net Income and Adjusted EPS for 2024." PR Newswire, 2025. https://www.prnewswire.com/news-releases/cme-group-inc-reports-all-time-record-annual-revenue-adjusted-operating-income-adjusted-net-income-and-adjusted-earnings-per-share-for-2024-302374213.html
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7. Intercontinental Exchange, Inc. "Intercontinental Exchange Reports Strong Full Year 2024 Results." Business Wire, February 2025. (Net revenues $9.3B; net income $2.8B; segment net revenues — Exchanges ~$5.0B, Fixed Income and Data Services ~$2.3B, Mortgage Technology ~$2.0B.) https://www.businesswire.com/news/home/20250206895707/en/Intercontinental-Exchange-Reports-Strong-Full-Year-2024-Results
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9. Cboe Global Markets, Inc. "Cboe Global Markets Reports Results for Fourth Quarter 2024 and Full Year" (net revenue $2.1B; net income $0.76B via Macrotrends). Mondovisione / Macrotrends, 2025. https://mondovisione.com/media-and-resources/news/cboe-global-markets-reports-results-for-fourth-quarter-2024-and-full-year-202527/
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11. The Options Clearing Corporation / SEC. "U.S. Options Exchanges" (list of ~16–18 registered options exchanges). https://www.theocc.com/
12. U.S. Commodity Futures Trading Commission. "Designated Contract Markets (DCMs)" and "Derivatives Clearing Organizations (DCOs)." CFTC. https://www.cftc.gov/IndustryOversight/TradingOrganizations/DCMs/index.htm
13. Texas Stock Exchange / Governing. "Texas Stock Exchange — SEC approval as a national securities exchange, September 2025." 2025. https://en.wikipedia.org/wiki/Texas_Stock_Exchange
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18. Cboe Global Markets. "2025 Annual Report" (4.6 billion U.S. options contracts in 2025; 59% of S&P 500 Index options volume in 0DTE options). 2026. https://s202.q4cdn.com/174824971/files/doc_financials/2025/ar/2025-Annual-Report.pdf
19. Nasdaq, Inc. "Nasdaq to Introduce 24-Hour Trading" (plan for a 23-hour trading day, five days a week, in H2 2026, subject to regulatory approval). 2025. https://ir.nasdaq.com/
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25. U.S. Department of Justice / FTC. "2023 Merger Guidelines: Guideline 1" (HHI above 1,800 indicates a highly concentrated market). 2023. https://www.justice.gov/atr/merger-guidelines/applying-merger-guidelines/guideline-1