Automobile and Other Motor Vehicle Merchant Wholesalers (NAICS 423110)

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

NAICS (North American Industry Classification System) code 423110 covers 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.

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1. Overview

When a rental company retires 40,000 cars, when a leasing bank takes back thousands of vehicles at lease-end, when a franchised dealer needs to clear aging trade-ins, or when an insurer writes off a wrecked car — those vehicles rarely go straight to a consumer. They flow through a wholesale layer: auctions, remarketers, and merchant wholesalers who take title (or run the marketplace where title changes hands), then move the metal to whoever will retail or scrap it. NAICS 423110 is the Census Bureau's label for the title-taking end of that layer.

This is a high-throughput, thin-margin, pass-through business. The 2023 Census Annual Integrated Economic Survey reports $838.5 billion of sales for the industry, comprising $373.8 billion from merchant wholesalers and $464.8 billion from manufacturers' sales branches [15]. Owners do not make money on the sticker; they make it on the spread between buy and sell, on volume, on turnover speed, and increasingly on fees and data from running the marketplace itself.

Why an investor cares. Wholesale is the price-discovery engine for the entire used-vehicle economy. The most-watched barometer of used-car values — the Manheim Used Vehicle Value Index — is a wholesale-auction index [10]. Wholesale volumes and spreads lead retail by weeks, so this industry is an early read on auto affordability, dealer health, and consumer credit.

Public vs. private ways in. There are only a handful of public pure-plays, and most of them are marketplace/auction operators rather than classic title-taking wholesalers: Copart (salvage auctions), OPENLANE (dealer-to-dealer digital wholesale, formerly KAR), ACV Auctions (online wholesale marketplace), and RB Global (owner of the IAA salvage auction network) [5][6][7][9]. Carvana runs a large wholesale segment (ADESA) alongside its retail business [8]. The single biggest operator, Manheim, is private — it belongs to Cox Automotive, a unit of family-owned Cox Enterprises [10][18]. Below the giants sits a long tail of thousands of independent used-vehicle wholesalers and remarketers, almost all privately held [1].

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2. What it is and how it's structured

Scope (what's in 423110). The Census definition: establishments primarily engaged in the merchant wholesale distribution of new and used passenger automobiles, trucks, trailers, and other motor vehicles such as motorcycles, motor homes, and snowmobiles [2]. In practice that includes:

• Used-vehicle wholesalers and remarketers — firms that buy off-lease, off-rental, fleet, and trade-in vehicles in bulk and resell to dealers.
• Wholesale auto auctions operating on their own account (taking title to the cars they sell).
• New-vehicle distributors — independent import/port distributors and captive distribution arms that wholesale to franchised dealers.
• Specialty vehicle wholesalers — trucks and trailers, motorcycles, RVs, snowmobiles.

What it EXCLUDES (and where those activities sit). This is a wholesale code, so the retail and parts worlds are separate:

• Retail motor-vehicle dealers — new-car (441110), used-car (441120), RV (441210), boat (441222), and motorcycle/other (441227) dealers all sit in the retail subsector, not here [2][3].
• Motor-vehicle parts and supplies wholesalers — new parts and supplies are 423120; used parts are 423140. A wrecking yard selling used parts is 423140, not 423110 [2].
• Agents and brokers who arrange vehicle sales on a commission or fee basis without taking title — these are wholesale trade agents and brokers (425120), a different code. This distinction matters enormously for reading the statistics (see Section 3).
• Vehicle manufacturing (subsector 336) and car rental/leasing (subsector 532) are separate industries entirely.

Ownership mix. The structure is a "barbell": a few very large operators (some public, the largest private) plus thousands of small, owner-operated independents. Federal data count about 4,730 firms running 6,117 establishments [1] — meaning most firms are single-location. The Small Business Administration's (SBA) size standard for this industry is 250 employees, so the overwhelming majority of these firms qualify as small businesses [1].

Operating models and accounting treatment. Three operating models coexist. Principal merchants buy vehicles, take title, hold inventory, and resell on their own account. Manufacturers operate separate sales branches that distribute new vehicles. Auction and digital-marketplace operators often act as agents, transferring vehicles directly from consignors to buyers. The distinction governs accounting: ACV records auction fees net of vehicle price when acting as agent but records transportation revenue gross when acting as principal; OPENLANE records only fees on consigned vehicles but records the full selling price where it owns the vehicle [6][7]. Consequently, marketplace GMV, Census wholesale sales, and GAAP revenue are different measures and should not be compared as though they were market-share data.

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3. How big it is

The federal figures below are the ground truth for this industry.

Two things jump out. First, revenue per employee is extraordinary — roughly $6.2 million per worker ($838B ÷ 136K) — and revenue per establishment is about $137 million. That is the signature of a pass-through business: you are moving whole vehicles at close to their full value, so the top line is huge and the value added per dollar of sales is tiny [1][15]. Average pay is about $88,000 per employee ($11.99B ÷ 136K) [1]. Second, much of the revenue is title-taking wholesale of vehicles, not auction commissions, with manufacturers' sales branches accounting for more than half of the total.

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 of sales). After $24.2 billion of operating expenses, Census "gross profit" was $41.8 billion, or 12.6% of total sales [16]. This Census definition differs from conventional public-company margins and excludes manufacturers' sales branches; it should not be applied to agent marketplaces whose vehicle value never enters revenue.

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% [1]. Yet the Herfindahl-Hirschman Index (HHI, a standard concentration gauge where under 1,500 is "unconcentrated") is only 755.8 [1]. Read together, these say: a few giants dominate the top, but there is a very long, fragmented tail of small independents beneath them.

Auction volumes. The National Auto Auction Association reports its member auctions sold more than 8 million wholesale used vehicles in 2025, including 820,000 digital-only transactions [17]. This is an association estimate for member used-vehicle auctions, not the volume of all NAICS 423110 activity, which also includes new vehicles, trucks, trailers, buses, motorcycles, and RVs.

The undercount caveat — important here. Federal business statistics likely understate the true economic footprint of vehicle wholesaling in three ways:

1. Consignment auctions are largely classified elsewhere. The biggest names in the business — Manheim, Copart, and IAA — mostly sell vehicles on consignment for a fee (they never take title). Fee/commission auction activity is classified as agents/brokers (425120), not as merchant wholesalers (423110) [2]. So the marketplace revenue of the industry's most recognizable operators does not fully land in these 423110 totals.
2. Curbstoners are uncounted. "Curbstoning" — unlicensed individuals buying and flipping used cars while posing as private sellers — is a large informal segment that never shows up in business statistics [14].
3. Captive distribution by automakers can be booked under manufacturing (336) rather than wholesale.

The takeaway: the Census figures are real and large, but they capture the title-taking wholesalers; the services revenue of the auction ecosystem sits partly outside this code.

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4. The investable universe

There are few public pure-plays, and the largest single operator is private. The cleanest public exposure is to the auction and digital-marketplace operators — the platforms that sit at the center of wholesale flow — rather than to classic buy-and-resell wholesalers. Tickers and scale are provided for orientation, not as recommendations.

Private and other major owners.

• Manheim (Cox Automotive / Cox Enterprises) — the largest wholesale vehicle auction operator, with 81 physical auction locations, more than 3.9 million vehicles inspected annually, and more than 80,000 active dealers in the Manheim marketplace [18]. Private; part of Cox Enterprises (~$23B revenue) [10]. This is the single most important player and it is not directly investable.
• The independent long tail — thousands of privately held used-vehicle wholesalers, fleet remarketers, and regional independent auctions that make up most of the ~4,730 firms [1].
• Captive remarketers — the vehicle-remarketing arms of automaker finance companies (e.g., manufacturer captive finance) and large rental fleets, which feed enormous volumes of off-lease and off-rental units into the wholesale channel.

Bottom line for the investable universe: if you want direct public exposure to vehicle wholesaling, you are mostly buying auction/marketplace operators (GMV, take-rates, and units) — GMV (gross merchandise value) is the total dollar value of vehicles transacted through the platform. The purest "buy-and-resell wholesaler" businesses are overwhelmingly private.

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5. How the money works

Owners in this industry earn money through a small number of levers. Which levers matter depends on whether the firm takes title (principal) or runs the marketplace (agent).

a) Title-taking wholesalers (principals). They buy vehicles in bulk and resell them. Profit is the gross spread per unit (sell price minus acquisition, transport, reconditioning, and floorplan interest) times volume, minus overhead. Because spreads are thin, two things dominate:

• Inventory turnover / days-to-sell. A wholesale vehicle is a depreciating asset financed with debt. Every extra day it sits costs interest (floorplan financing) and risks a falling market. Fast turns are everything.
• Buy discipline and reconditioning. Money is made "on the buy." Accurate valuation, cheap reconditioning, and knowing exactly what a segment will bring at auction are the core skills.

Carvana's wholesale segment illustrates the unit economics: about $996 of gross profit per wholesale unit in 2024 [8] — a few hundred to ~$1,000 per car, on cars worth many times that. OPENLANE's filings note that purchased vehicles expose it to theft, damage, obsolescence, and changes in vehicle values, while consigned vehicles generate fees without inventory ownership [6].

b) Marketplace / auction operators (agents). They don't own the cars; they charge buyer and seller fees on each transaction plus ancillary services (transport, inspections, titling, financing, data/analytics). The key metrics:

• Units sold and GMV (dollar value transacted).
• Take-rate / revenue per unit — fee revenue divided by units or GMV. OPENLANE moved ~$28.8B of GMV to produce ~$1.93B of revenue in 2025, including $833.5M of auction and related fees, $257.1M of SaaS and other revenue, $410.2M of purchased-vehicle sales, and $433.7M of finance revenue [6]; ACV produced ~$760M on ~$10.4B GMV [7].
• Attach of ancillary services — transport, floorplan financing (OPENLANE's AFC unit), inspections, and data subscriptions carry higher margins than the core auction fee and are the main profit-growth story. ACV attributes recent revenue-per-unit improvement to higher buyer fees and greater use of ancillary services [6][7].
• Operating leverage and network effects — auctions are two-sided marketplaces: more sellers attract more buyers, which lifts prices and draws more sellers. Physical-auction operators also carry heavy fixed costs (land, lanes, staff), so incremental volume drops to the bottom line.

c) Salvage auctions (a special, high-margin niche). Copart and IAA sell total-loss vehicles for insurers, almost entirely on consignment for a fee. This is structurally attractive: near-zero inventory risk, sticky multi-year insurer contracts, a global buyer base (dismantlers, rebuilders, exporters) that keeps demand deep, and land/scale barriers that deter entrants. It behaves more like a services/marketplace business than a wholesaler — which is why Copart earns software-like margins that a title-taking wholesaler never could [5][11].

Physical facilities remain useful even when bidding is digital because vehicles still require intake, imaging, inspection, secure storage, keys, titles, reconditioning, and outbound transportation.

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6. What drives demand

Wholesale volume is a derived demand — it depends on how many vehicles enter and exit the fleet and how briskly retail is selling.

• Off-lease and off-rental supply. Vehicles returned at lease-end and retired rental cars are the lifeblood of nearly-new wholesale supply. This is the single biggest swing factor right now. Lease maturities fell to roughly 2.4 million in 2025 (down from ~4 million in 2020 as pandemic-era leasing dried up) and are projected to rebound to about 3 million in 2026 [12]. Fewer maturities means tighter wholesale supply and firmer prices; the coming rebound loosens it.
• New-vehicle sales. More new sales generate trade-ins and, a few years later, off-lease returns. New-vehicle sales are running around 16 million units [12].
• Used-vehicle retail demand. Total used sales are on the order of 20 million units a year [10]; strong retail pulls vehicles through wholesale faster.
• Used-vehicle values and affordability. The Manheim Used Vehicle Value Index — the wholesale price benchmark — ended 2025 up just 0.4% year over year, well below its long-run ~2.3% pace, reflecting affordability strain and tariff-driven volatility [10]. Values set the spread wholesalers earn and the pace at which dealers restock.
• Insurer total-loss frequency (for salvage). Higher accident frequency, higher repair costs, and older vehicle fleets raise the share of damaged cars that insurers "total," feeding salvage auction volume [11].
• Interest rates and credit. Wholesale inventory is debt-financed (floorplan), and retail demand depends on auto-loan rates. Higher rates squeeze both the wholesaler's carry cost and the end-buyer's affordability.
• The digital shift. Wholesale is moving online. The U.S. vehicle-auction market was about $3.47 billion in service revenue in 2024, with online whole-car auctions the fastest-growing segment [4] — a tailwind for digital-first platforms (ACV, OPENLANE) and a threat to purely physical auctions.

Seasonality. Volume is affected by holidays, weather, used-retail seasonality, and the timing of federal tax refunds; the fourth quarter and early winter are typically weaker periods [7].

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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. Buying and reselling vehicles for profit requires a wholesale (or dealer) license in essentially every state, plus surety bonds and a physical place of business. Selling without a license — curbstoning — is illegal and actively enforced [14].
• Title and odometer law. Federal law (and every state) prohibits odometer tampering and requires accurate odometer and title disclosures at each transfer; violations carry criminal penalties [14]. NHTSA requires odometer disclosure during transfers for the first 20 years for model-year 2011 and newer vehicles [19]. Salvage and branded titles must be disclosed, and many states require a separate salvage dealer license to buy or sell total-loss vehicles [14].
• FTC Used Motor Vehicle Trade Regulation Rule (the "Used Car Rule"). The Federal Trade Commission requires a Buyers Guide window sticker on used vehicles offered for retail sale, disclosing warranty status [13]. Dealer-only auctions differ legally from public consumer auctions under this rule. It principally binds retail, but it shapes how reconditioned wholesale units are re-sold downstream.
• Anti-money-laundering / cash reporting. Dealers and wholesalers must file IRS/FinCEN Form 8300 for cash transactions over $10,000 — a real compliance point given the cash-heavy corners of the used market.
• Physical-site regulations. Operators face zoning, site-permitting, worker-safety, hazardous-material, stormwater, and environmental-remediation exposure. RB Global notes that salvage titles, buyer eligibility, transport, auction-site development, and storage or disposal of environmentally sensitive materials are regulated across jurisdictions [9].
• Emissions and EV rules. State emissions standards, import/port compliance for new-vehicle distributors, and the growing wave of used electric vehicles (EVs) create title, disclosure, and valuation wrinkles wholesalers must manage.

Regulation here is more about licensing, titling integrity, and consumer disclosure than about price or entry — it raises the bar for legitimate operators and pushes informal activity to the margins.

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8. Competitive dynamics and consolidation

• A consolidated top, a fragmented bottom. The salvage side is effectively a duopoly: Copart (~50% share) and RB Global's IAA (~35%) run virtually all organized total-loss auctions [11]. The dealer-to-dealer and off-lease "whole-car" side is led by Manheim (private), OPENLANE, ACV, and Carvana's ADESA. Beneath them, thousands of independents compete locally [1][11].
• Barriers to entry are high for the leaders and low for the tail. Salvage and physical whole-car auctions require land, storage, transport networks, and long-term contracts with insurers or fleets — hard to replicate. But a small independent wholesaler needs only a license, a bond, and a floorplan line, which keeps the tail crowded and competitive.
• The digital disruption. ACV and OPENLANE built online-first marketplaces that let dealers buy without vehicles ever sitting on a physical lane — attacking the incumbents' land-heavy model. Incumbents (Manheim, ADESA) responded by digitizing and, in Manheim/OPENLANE's case, working toward cross-platform bidding so buyers can shop multiple auctions at once [4].
• Recent consolidation. RB Global (then Ritchie Bros.) acquired IAA in 2023, reshaping the salvage duopoly; Carvana acquired ADESA's U.S. physical auctions in 2022, vertically integrating a retailer into wholesale [8][9]. Competitive share is actively contested — insurers like Progressive have shifted salvage volume between Copart and IAA, a reminder that even the duopoly's shares move [11].
• Vertical integration is a recurring theme: retailers (Carvana) buying wholesale infrastructure, and wholesalers pushing into financing, transport, and data to capture more of each transaction.
• Substitution threats. Direct dealer-to-dealer transactions, OEM or captive closed networks, fleet private sales, consumer instant-buy channels, and vertically integrated retailers can bypass traditional wholesale. Copart specifically identifies dismantlers purchasing salvage directly from insurers as a bypass risk [5].

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9. Risks

• Cyclicality and price risk. Title-taking wholesalers hold depreciating inventory financed with debt. A sudden drop in used-vehicle values (as in 2022–2023 after the pandemic spike) can turn spreads negative and wipe out thin margins. Marketplace operators are more insulated but still see volume fall in downturns.
• Supply whipsaw. The off-lease pipeline is volatile: the 2024–2025 supply drought squeezed volumes, while the 2026 rebound loosens them [12]. Wholesalers live and die by these swings.
• Interest-rate sensitivity. Higher rates raise floorplan carrying costs and crush end-buyer affordability simultaneously — a double hit.
• Tariffs and trade policy. Tariffs on new vehicles and parts feed through to used-vehicle values and volatility, as seen across 2025 [10]. Trade restrictions can also change export-buyer participation and the value of used or salvage vehicles.
• Disruption of the physical model. Online-first entrants threaten the economics of land-heavy physical auctions; incumbents must digitize without stranding real-estate investments.
• EV transition. A coming surge of off-lease EVs — projected to more than triple in 2026 versus 2025 [12] — brings uncertain residual values, faster depreciation, and thinner buyer demand, complicating valuation and inventory risk. Battery health, rapidly changing new-vehicle prices, incentives, repairability, and model obsolescence make residual values harder to estimate; digital battery diagnostics may become an important extension of condition reporting.
• Concentration/contract risk (salvage). Copart and IAA depend on a handful of large insurers; losing or re-pricing a major contract moves volume and share materially [11].
• Operational risks. RB Global identifies driver shortages, higher towing and branch labor costs, fuel inflation, and limited yard capacity as profitability risks [9]. Title defects, undisclosed damage, odometer fraud, inaccurate inspections, and arbitration claims can erase transaction economics. Digital operators add cybersecurity, payment fraud, privacy, and platform-availability risks.
• Regulatory and titling risk. Odometer fraud, title-washing, and curbstoning invite enforcement; compliance failures carry criminal exposure [14].

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10. How to invest and the outlook

Public routes. Direct public exposure is concentrated in the auction/marketplace operators:

• Salvage duopoly — Copart (CPRT) and RB Global (RBA) offer the highest-margin, most defensible exposure (consignment fees, sticky insurer contracts, global buyer demand). Watch salvage unit growth, insurer contract wins/losses, and international expansion [5][9][11].
• Digital whole-car marketplaces — OPENLANE (KAR) and ACV Auctions (ACVA) are the growth-and-take-rate story; track units, GMV, revenue per unit, and the profitability of ancillary services (financing, transport, inspections, data) [6][7].
• Integrated retail+wholesale — Carvana (CVNA) gives blended exposure through ADESA, but its equity is driven mainly by its retail business, not wholesale [8].
• There is no meaningful pure-play public "buy-and-resell wholesaler," and there is no widely held sector exchange-traded fund (ETF) dedicated to vehicle wholesaling — investors typically get exposure through these individual names or via broader consumer-discretionary/auto-retail funds. (Tickers listed for orientation, not as recommendations.)

Private routes. This industry is fundamentally a private-market business. Ways in include: owning or backing an independent wholesale/remarketing operation (buy discipline, floorplan management, and turnover are the edge); regional independent auctions; fleet-remarketing and reconditioning services; and fintech/software serving wholesale (valuation data, transport logistics, digital titling, floorplan lending). The dominant operator, Manheim, is inside privately held Cox Enterprises and not directly investable [10][18]. Private buyers should underwrite the same levers the public marketplaces trade on: units, take-rate, ancillary attach, and inventory-turn discipline. Investors can also target enabling businesses — inspection and condition-data providers, title processors, transport brokers, reconditioning operations, auction real estate, or floorplan lenders — though these carry very different working-capital, credit, and asset-intensity profiles.

Near-term drivers (forward-looking). The setup for 2026 is a supply rebound after a lean stretch: lease maturities are expected to rise about 27% to ~3 million units, and off-lease supply is projected up roughly a half-million units — loosening wholesale supply and normalizing prices, with the Manheim index forecast to rise about 2% [10][12]. New-vehicle sales settling near 16 million and used sales around 20 million support steady wholesale throughput [12]. The clearest structural tailwind is the continued shift of wholesale online, favoring digital-first platforms and pressuring land-heavy physical auctions [4]. The clearest wildcards are tariffs/used-vehicle-value volatility and the off-lease EV wave, whose uncertain residuals could deliver either a volume windfall or a valuation headache for anyone holding inventory [10][12]. These are projections, not certainties — the industry's history is one of sharp, hard-to-forecast supply and price swings.

Analytical caution. The most common analytical error is to call this the "auto-auction industry" and compare public-company revenue. NAICS 423110 is a complete-vehicle distribution category; auctions are only one channel. Census sales may include the full value of title-taking vehicles, while public marketplace revenue may include only fees and GMV may include neither recognized revenue nor economic value added. No single profit margin, concentration ratio, or market-share table captures the entire code cleanly.

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Sources

1. U.S. Census Bureau — County Business Patterns (2023), Economic Census (2022, receipts & concentration ratios); U.S. Small Business Administration — Table of Size Standards (2023). Ground-truth federal statistics for NAICS 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 — 2022 NAICS definition, code 423110 "Automobile and Other Motor Vehicle Merchant Wholesalers" (via NAICS reference). 2022. https://www.census.gov/naics/?details=423110&input=423110&year=2022
3. IBISWorld — "NAICS Code 423110: Automobile and Other Motor Vehicle Merchant Wholesalers." 2025. https://www.ibisworld.com/classifications/naics/423110/automobile-and-other-motor-vehicle-merchant-wholesalers/
4. 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
5. Copart, Inc. — Form 10-K for fiscal year 2025. 2025. https://www.sec.gov/Archives/edgar/data/900075/000162828025042946/cprt-20250731.htm
6. OPENLANE, Inc. — Form 10-K for fiscal year 2025. 2026. https://www.sec.gov/Archives/edgar/data/1395942/000139594226000006/opln-20251231.htm
7. ACV Auctions Inc. — Form 10-K for fiscal year 2025. 2026. https://www.sec.gov/Archives/edgar/data/1637873/000163787326000011/acva-20251231.htm
8. 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
9. 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
10. 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/
11. 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/
12. 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
13. 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
14. 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
15. 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
16. 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
17. National Auto Auction Association — AuctionNet USA (member auction volume statistics). 2025. https://naaa.com/auctionnetusa/
18. Cox Automotive — Manheim company overview (locations, inspections, dealer network). 2025. https://www.coxautoinc.com/brands/manheim/
19. 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