Automobile and Other Motor Vehicle Merchant Wholesalers (NAICS 42311)

An investor's primer — U.S. industry. Relevant to both public-market and private investors.

NAICS (North American Industry Classification System) code 42311 is a NAICS industry — a five-digit level covering the firms that buy and resell whole motor vehicles at the wholesale level: the middlemen who move new and used cars, trucks, trailers, motorcycles, motor homes, and recreational vehicles (RVs) between manufacturers, dealers, fleets, and each other, rather than selling to the retail public.

This is a single-child pass-through level. NAICS 42311 contains exactly one child industry, 423110 — Automobile and Other Motor Vehicle Merchant Wholesalers, and the two are effectively identical in definition, scope, and statistics. This page is intentionally short: it confirms the equivalence, states this level's own ground-truth federal figures, and points you to the full leaf primer for 423110 for everything else. For the complete treatment — how the money works, the salvage duopoly, the digital-marketplace shift, demand drivers, regulation, and the investable universe — read the 423110 primer.

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1. Overview

When a rental company retires tens of thousands of cars, when a leasing bank takes back off-lease vehicles, when a franchised dealer clears aging trade-ins, or when an insurer writes off a wreck, those vehicles rarely go straight to a consumer. They flow through a wholesale layer — auctions, remarketers, and title-taking merchant wholesalers — before someone retails or scraps them. NAICS 42311 is the Census Bureau's label for the title-taking end of that layer.

It is a high-throughput, thin-margin, pass-through business: because a wholesaler is reselling a whole vehicle worth tens of thousands of dollars, gross receipts are enormous relative to headcount — roughly 4,730 firms and 136,000 paid employees move hundreds of billions of dollars of vehicles a year [1]. The Census Annual Integrated Economic Survey puts 2023 sales for this industry at $838.5 billion, split between $373.8 billion from merchant wholesalers proper and $464.8 billion from manufacturers' sales branches [2]. Owners make money not on the sticker but on the spread between buy and sell, on volume, on turnover speed, and increasingly on fees and data from running the marketplace itself.

Why the level matters beyond its own size. Wholesale is the price-discovery engine for the whole used-vehicle economy — the most-watched used-car barometer, the Manheim Used Vehicle Value Index, is a wholesale-auction index — so this industry reads out on auto affordability, dealer health, and consumer credit weeks before retail does [13].

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2. What's inside — and why this level equals its one child

A NAICS industry (5-digit) can, in principle, split into several six-digit national industries. This one does not: 42311 breaks down into a single child, 423110, which carries the same title and the same Census definition [3]. When a five-digit group has only one six-digit child, the parent is just the child under a shorter code — same scope, same firms, same numbers. There is no aggregation to do and no sibling industries to weigh against each other.

Because of that, everything substantive about 42311 is the story of 423110:

• What's in scope — used-vehicle wholesalers and remarketers, wholesale auto auctions operating on their own account (taking title), independent and captive new-vehicle distributors, manufacturers' sales branches, and specialty wholesalers of trucks, trailers, motorcycles, RVs, and snowmobiles [3].
• What's excluded — retail motor-vehicle dealers (subsector 441), motor-vehicle parts wholesalers (new parts 423120, used parts 423140), and commission agents/brokers who arrange vehicle sales without taking title (425120). Vehicle manufacturing (336) and rental/leasing (532) sit elsewhere again. The agent/broker exclusion matters for reading the statistics, and the 423110 primer explains why.

One structural point worth carrying up. Three operating models coexist inside this single code — principal merchants who take title and hold inventory, manufacturers' sales branches distributing new vehicles, and auction/marketplace operators who transfer vehicles from consignors to buyers as agents. That distinction governs the accounting, which is why marketplace gross merchandise value (GMV), Census wholesale sales, and GAAP revenue are three different measures and cannot be lined up as market shares [9][10]. For all of that detail, see the 423110 primer.

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3. Size (this level's rollup figures)

The figures below are our ingested ground-truth federal statistics for NAICS 42311 specifically [1], alongside the newer Census survey figure the child primer now leads with [2]. Because this level equals its single child, they match the 423110 figures exactly.

Which revenue number to use. The two top-line figures are not a contradiction so much as two different instruments: $768.3 billion is Economic Census 2022 receipts (our ingested ground truth for this code) [1], while $838.5 billion is Annual Integrated Economic Survey sales for 2023, a later year on a survey basis that reports the split between merchant wholesalers and manufacturers' sales branches [2]. The child primer now leads with the AIES figure; both are cited here because the level's own ingested statistic remains the Economic Census one. What the AIES split makes clear — and what neither headline number tells you on its own — is that more than half of this code's revenue is manufacturers' sales branches, not independent title-taking wholesalers [2].

Margins. For merchant wholesalers excluding manufacturers' sales branches, the 2022 Economic Census reports a gross margin of 20.0% of own-account sales ($66.0 billion on $331.0 billion), and after $24.2 billion of operating expenses a Census "gross profit" of $41.8 billion, or 12.6% of total sales [4]. That $331.0 billion own-account base is roughly the same order as the AIES merchant-wholesaler line, which reinforces the reading above. Note the Census definitions differ from conventional public-company margins and should not be applied to agent marketplaces, whose vehicle value never enters revenue at all.

Concentration. The four largest firms take 51.1% of receipts, the top eight 66.5%, the top 20 81.9%, and the top 50 88.8% — yet the Herfindahl-Hirschman Index (HHI, a standard concentration gauge where under 1,500 is "unconcentrated") is only 755.8 [1]. Read together: a few giants dominate the top, with a long, fragmented tail of small independents beneath them. The SBA's 250-employee size standard means the overwhelming majority of the 4,730 firms count as small businesses [1].

Two signatures stand out. Revenue per employee is extraordinary — roughly $5.6 million per worker on the Economic Census basis ($768B ÷ 136K) and about $6.2 million on the AIES basis ($838B ÷ 136K), with revenue per establishment around $137 million — the hallmark of a pass-through business where the top line is huge but the value added per dollar of sales is tiny [1][2]. Average pay works out to about $88,000 per employee ($11.99B ÷ 136K) [1]. And with about 4,730 firms running 6,117 establishments, most firms are single-location.

Auction volumes, for scale. The National Auto Auction Association reports member auctions sold more than 8 million wholesale used vehicles in 2025, including 820,000 digital-only transactions [5]. That is an association estimate for member used-vehicle auctions, not the volume of all 42311 activity, which also spans new vehicles, trucks, trailers, buses, motorcycles, and RVs.

Undercount caveat — important here. These totals capture the title-taking wholesalers, and understate the true economic footprint of vehicle wholesaling in three ways: (1) the biggest names — Manheim, Copart, IAA — mostly sell on consignment for a fee and are classified as agents/brokers (425120), not here [3]; (2) curbstoning (unlicensed individuals flipping cars) never shows up in business statistics [6]; and (3) automaker captive distribution can be booked under manufacturing (336). Small individual and informal ownership is common in this trade, so treat the firm and employment counts as a floor. The 423110 primer details each gap.

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4. Investable universe (where value concentrates)

Because this level is a single child, there is no spreading of value across sibling industries — the entire investable universe sits within 423110. In brief: there are few public pure-plays, and the largest single operator is private. The cleanest public exposure is to auction and digital-marketplace operators rather than classic buy-and-resell wholesalers:

• Copart (CPRT) — the largest U.S. salvage/total-loss auction network, ~$4.6 billion of FY2025 revenue ($4.0B service, $0.7B principal vehicle sales) across 200+ locations [7].
• RB Global (RBA) — owner of IAA, the #2 salvage network; ~$4.3 billion of 2024 revenue, with IAA processing more than 2.5 million vehicles a year [8].
• OPENLANE (KAR) — digital dealer-to-dealer and off-lease wholesale; ~$1.93 billion of 2025 revenue on ~$28.8 billion of GMV and ~1.5 million vehicles [9].
• ACV Auctions (ACVA) — online-only dealer-to-dealer marketplace; ~$760 million of 2025 revenue, 829,000 vehicles sold, ~$10.4 billion of GMV [10].
• Carvana (CVNA) — wholesale segment plus the ADESA physical auction marketplace; 2024 saw 199,780 wholesale units sold, 955,802 ADESA marketplace units, and $346 million of wholesale gross profit [11].

The dominant operator, Manheim, is not directly investable: 81 physical auction locations, more than 3.9 million vehicles inspected annually, and more than 80,000 active dealers, all inside Cox Automotive, a unit of privately held Cox Enterprises (~$23 billion of revenue) [12][13]. Beneath the giants sits a long tail of thousands of privately held independents, plus the remarketing arms of captive finance companies and rental fleets that feed the channel [1].

A comparability warning. The scale figures above are not like-for-like. Copart's and Carvana's numbers mix principal and agent activity; OPENLANE and ACV report fees on consigned vehicles but full selling price where they own the vehicle; GMV counts dollars transacted that never enter revenue at all [9][10]. Do not build a market-share table out of them. Tickers, and the full company-by-company breakdown, are in the 423110 primer, which is where the money actually concentrates.

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5. How the money works

Two profit models coexist, and which matters depends on whether a firm takes title (principal) or runs the marketplace (agent):

• Title-taking wholesalers (principals) earn the gross spread per unit (sell price minus acquisition, transport, reconditioning, and floorplan interest) times volume. Spreads are thin, so inventory turnover and buy discipline dominate — money is made "on the buy," and every extra day a debt-financed, depreciating vehicle sits erodes it. Carvana's wholesale segment shows the order of magnitude: about $996 of gross profit per wholesale unit in 2024, on cars worth many multiples of that [11].
• Marketplace / auction operators (agents) don't own the cars; they charge buyer and seller fees plus ancillary services (transport, inspections, titling, financing, data), and live on units, GMV (gross merchandise value — the total dollar value transacted), and take-rate. OPENLANE converted ~$28.8 billion of 2025 GMV into ~$1.93 billion of revenue — $833.5 million of auction and related fees, $257.1 million of SaaS and other, $410.2 million of purchased-vehicle sales, and $433.7 million of finance revenue [9]; ACV produced ~$760 million on ~$10.4 billion of GMV [10]. Ancillary attach, not the core auction fee, is the profit-growth story.

Salvage auctions (Copart, IAA) are a special, high-margin niche: they sell total-loss vehicles for insurers almost entirely on consignment, carrying near-zero inventory risk, backed by sticky multi-year insurer contracts and a global buyer base — which is why Copart earns margins a title-taking wholesaler never could [7][14]. Physical facilities still matter even when bidding is digital, because vehicles need intake, imaging, inspection, secure storage, keys, titles, and outbound transport. The 423110 primer works through the unit economics and metrics in full.

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6. Demand drivers

Wholesale volume is a derived demand — it depends on how many vehicles enter and exit the fleet and how briskly retail is selling. The main swings: off-lease and off-rental supply (lease maturities fell to roughly 2.4 million in 2025, down from ~4 million in 2020, and are projected to rebound toward ~3 million in 2026) [15], new-vehicle sales (~16 million units) and used-vehicle demand (~20 million units) [13][15], used-vehicle values (the Manheim Used Vehicle Value Index ended 2025 up just 0.4% year over year, well below its long-run ~2.3% pace, reflecting affordability strain and tariff-driven volatility) [13], insurer total-loss frequency (for salvage) [14], interest rates and credit (floorplan carry plus buyer affordability), and the ongoing shift of wholesale online — the U.S. vehicle-auction market ran about $3.47 billion of service revenue in 2024, with online whole-car auctions the fastest-growing segment [16]. Volume is also seasonal, with the fourth quarter and early winter typically weaker [10]. See 423110 for the detail.

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7. Regulation

Vehicle wholesaling is regulated mainly at the state level, layered with a few federal rules: state dealer/wholesaler licensing (with surety bonds and a physical place of business, with unlicensed curbstoning actively enforced) [6], title and odometer law (odometer-tampering bans, salvage/branded-title disclosure, and NHTSA's requirement of odometer disclosure at transfer for the first 20 years on model-year 2011 and newer vehicles) [6][18], the Federal Trade Commission's Used Motor Vehicle Trade Regulation Rule ("Used Car Rule" Buyers Guide, which binds retail but shapes how reconditioned wholesale units are resold downstream) [17], and cash-transaction reporting (IRS/FinCEN Form 8300 over $10,000). Physical operators additionally carry site-level exposure — zoning, permitting, worker safety, hazardous materials, stormwater, and environmental remediation, plus jurisdiction-by-jurisdiction rules on salvage titles, buyer eligibility, and transport [8]. The emphasis is on licensing, titling integrity, and consumer disclosure rather than price or entry. Full treatment in 423110.

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8. Consolidation

A consolidated top, a fragmented bottom. Salvage is effectively a duopoly — Copart (~50% share) and RB Global's IAA (~35%) [14]. The dealer-to-dealer and off-lease "whole-car" side is led by Manheim (private), OPENLANE, ACV, and Carvana's ADESA, with thousands of independents competing locally [1][14]. Barriers are high for the leaders (land, storage, transport networks, long-term insurer/fleet contracts) and low for the tail (a license, a bond, and a floorplan line). Recent moves — RB Global's 2023 acquisition of IAA, Carvana's 2022 purchase of ADESA's U.S. physical auctions, and digital-first entrants (ACV, OPENLANE) attacking the land-heavy incumbents, with incumbents responding by digitizing and working toward cross-platform bidding — are reshaping the field [8][11][16]. Even the duopoly's shares move: insurers such as Progressive have shifted salvage volume between Copart and IAA [14]. And the whole layer faces bypass risk — direct dealer-to-dealer trades, OEM and captive closed networks, fleet private sales, consumer instant-buy channels, and (in salvage) dismantlers buying straight from insurers [7]. See 423110.

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9. Risks

The key risks all live at the child level: cyclicality and price risk (title-takers hold depreciating, debt-financed inventory — a drop in used-vehicle values can turn thin spreads negative), supply whipsaw in the off-lease pipeline [15], interest-rate sensitivity (floorplan carry plus buyer affordability), tariffs and trade policy feeding into used values and export-buyer participation [13], disruption of the physical-auction model, the EV (electric vehicle) transition — off-lease EVs are projected to more than triple in 2026 versus 2025, with battery health, incentives, and repairability making residuals hard to underwrite [15] — and contract/concentration risk in salvage, where a handful of large insurers drive volume [14]. On top of those sit operational risks: driver shortages, higher towing and branch labor costs, fuel inflation, and limited yard capacity [8], plus title defects, undisclosed damage, odometer fraud, arbitration claims, and — for digital operators — cybersecurity, payment fraud, and platform-availability exposure. The 423110 primer covers each.

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10. How to invest and the outlook

Because 42311 is a single-child level, the how-to-invest picture is identical to 423110's. Public routes concentrate in auction/marketplace operators: the salvage duopoly (Copart, RB Global) for the highest-margin, most defensible exposure; digital whole-car marketplaces (OPENLANE, ACV Auctions) for the growth-and-take-rate story; and Carvana for blended retail-plus-wholesale exposure, though its equity is driven mainly by retail. There is no meaningful pure-play public "buy-and-resell wholesaler" and no dedicated sector exchange-traded fund (ETF) [7][8][9][10][11]. Private routes — backing an independent wholesale/remarketing operation, a regional auction, reconditioning or fleet-remarketing services, or wholesale fintech/software — are how most capital actually participates, since the industry is fundamentally a private-market business and its dominant operator (Manheim) sits inside privately held Cox Enterprises [12][13]. Adjacent enabling businesses (inspection and condition data, title processing, transport brokerage, auction real estate, floorplan lending) offer another way in, with very different working-capital, credit, and asset-intensity profiles.

Outlook. The 2026 setup is a supply rebound after a lean stretch: lease maturities up roughly 27% toward ~3 million units, off-lease supply up about a half-million, and the Manheim index forecast to rise about 2% — loosening wholesale supply and normalizing prices [13][15]. New-vehicle sales near 16 million and used sales around 20 million support steady throughput [15]. The clearest structural tailwind is the continued shift of wholesale online [16]; the clearest wildcards are tariff-driven value volatility and the off-lease EV wave [13][15]. These are projections, not certainties.

Analytical caution. The most common error at this level is to call 42311 "the auto-auction industry" and compare public-company revenue against Census sales. It is a complete-vehicle distribution code in which auctions are one channel, manufacturers' sales branches are more than half the reported sales [2], and the largest consignment operators are classified outside the code altogether [3]. No single margin, concentration ratio, or share table captures it cleanly. For the complete outlook and the full company detail, see the 423110 primer — of which this page is simply the five-digit rollup.

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Sources

This is a single-child rollup; the size figures in Section 3 are our ingested ground-truth federal statistics for NAICS 42311, and the remaining sources are drawn from the child primer for 423110.

1. U.S. Census Bureau — County Business Patterns (2023: establishments, employment, annual and first-quarter payroll), Economic Census (2022: receipts, firm count, and concentration ratios); U.S. Small Business Administration — Table of Size Standards (2023). Ground-truth federal statistics for NAICS 42311 / 423110. https://www.census.gov/programs-surveys/economic-census.html; https://www.census.gov/programs-surveys/cbp.html; https://www.sba.gov/document/support-table-size-standards
2. U.S. Census Bureau — Census Annual Integrated Economic Survey (AIES), NAICS 423110 time series (2023 sales by type of operation). 2024. https://data.census.gov/table?tid=AIESBASICTIMESERIES.AIES42BASIC
3. U.S. Census Bureau — 2022 NAICS definition, code 423110 "Automobile and Other Motor Vehicle Merchant Wholesalers." 2022. https://www.census.gov/naics/?details=423110&input=423110&year=2022
4. U.S. Census Bureau — 2022 Economic Census, Gross Margin and Gross Profit table for NAICS 423110 merchant wholesalers. 2024. https://data.census.gov/table/ECNGRMARGPROF2022.EC2242GRMARGPROF
5. National Auto Auction Association — AuctionNet USA (member auction volume statistics). 2025. https://naaa.com/auctionnetusa/
6. Bumper / state motor-vehicle agencies — "Curbstoning: How to Spot Unlicensed Dealers" (licensing, odometer, title, salvage-license rules). 2024. https://www.bumper.com/car-advice/buying/curbstoning-scam
7. Copart, Inc. — Form 10-K for fiscal year 2025. 2025. https://www.sec.gov/Archives/edgar/data/900075/000162828025042946/cprt-20250731.htm
8. RB Global, Inc. — "RB Global reports fourth quarter and full year 2024 results" (BusinessWire); Form 10-K for fiscal year 2025; IAA vehicle-volume profile. 2025–2026. https://www.businesswire.com/news/home/20250218757724/en/RB-Global-reports-fourth-quarter-and-full-year-2024-results; https://www.sec.gov/Archives/edgar/data/1046102/000162828026011682/rba-20251231.htm
9. OPENLANE, Inc. — Form 10-K for fiscal year 2025. 2026. https://www.sec.gov/Archives/edgar/data/1395942/000139594226000006/opln-20251231.htm
10. ACV Auctions Inc. — Form 10-K for fiscal year 2025. 2026. https://www.sec.gov/Archives/edgar/data/1637873/000163787326000011/acva-20251231.htm
11. Carvana Co. — Form 10-K for fiscal year 2024 (wholesale segment: units, ADESA marketplace, gross profit). 2025. https://www.sec.gov/Archives/edgar/data/1690820/000169082025000074/cvna-20241231.htm
12. Cox Automotive — Manheim company overview (locations, inspections, dealer network). 2025. https://www.coxautoinc.com/brands/manheim/
13. Cox Automotive — Manheim Used Vehicle Value Index, Q4 2025 report and 2026 outlook; Manheim/Cox Enterprises scale. 2025–2026. https://www.coxautoinc.com/insights/q4-2025-muvvi/
14. Transportation Today — "RB Global rebuild takes hold as shifting Progressive behavior puts new pressure on Copart" (salvage market shares, Copart ~50% / IAA ~35%). 2025. https://transportationtodaynews.com/news/36872-rb-global-rebuild-takes-hold-as-shifting-progressive-behavior-puts-new-pressure-on-copart/
15. Edmunds — "Used Car Prices Approach Records… Off-Lease Inventory" (Q1 2026 Insights); Cox Automotive off-lease/lease-maturity and SAAR forecasts. 2025–2026. https://www.edmunds.com/car-news/q1-2026-edmunds-insights-used-car-report.html
16. Research and Markets (via GlobeNewswire) — "US Vehicle Auction Market Trends 2025-2030." 2025. https://www.globenewswire.com/news-release/2025/08/07/3129425/28124/en/US-Vehicle-Auction-Market-Trends-2025-2030.html
17. U.S. Federal Trade Commission — "Used Motor Vehicle Trade Regulation Rule" (Buyers Guide), Federal Register. 2014 (current). https://www.federalregister.gov/documents/2014/11/28/2014-28000/used-motor-vehicle-trade-regulation-rule
18. National Highway Traffic Safety Administration — Consumer alert on changes to odometer disclosure requirements. 2021. https://www.nhtsa.gov/press-releases/consumer-alert-changes-odometer-disclosure-requirements