All Other Specialty Trade Contractors (NAICS 238990): An Investor's Primer

1. Overview

"All Other Specialty Trade Contractors" is the catch-all bucket of the U.S. construction trades — the specialized jobs that don't fit any of the named trade categories. It is defined by the North American Industry Classification System (NAICS), the federal statistical taxonomy for industries [1]. The work ranges from consumer-facing outdoor projects (fence installation, driveway and parking-lot paving, in-ground swimming pools, sealcoating) to heavy commercial and industrial services (crane rental with an operator, scaffold erection, sandblasting, steeplejack work, billboard erection, and manufactured-home setup) [1].

Two things make this industry distinctive, and they matter to investors:

• It is large but extraordinarily fragmented. Roughly $83 billion in annual receipts spread across ~42,000 employer firms, plus a much larger base of self-employed operators [2][3]. The four largest firms control only about 5% of revenue [3] — one of the least-concentrated industries in the U.S. economy.
• It is really a bundle of very different sub-industries under one code. A solo fence installer and a national crane-and-rigging company are both "238990," yet they have almost nothing in common in customers, assets, seasonality, or barriers to entry.

Because of that, there is no pure-play public stock for this code, and there is no single industry cycle. For public-market investors, exposure is indirect — through paving contractors, pool-products companies, and large diversified specialty-contractor names whose crews overlap this work. For private investors, the fragmentation is the opportunity: low barriers to entry, aging owners willing to sell cheaply, and an active private-equity "roll-up" trend that combines and professionalizes local operators. The best opportunities are found by sub-trade, geography, customer type, and contract quality — not by the NAICS label alone.

2. What it is, and how it's structured

A specialty (or "trade") contractor performs one defined portion of a construction project rather than delivering the whole building. The work is usually subcontracted by general contractors or builders, though repair and remodeling jobs are often sold directly to property owners [1]. NAICS 238990 specifically covers specialty trades that are not captured by the more specific specialty-trade codes [1]. Representative activities [1]:

• Crane rental with an operator, heavy lifting, and rigging
• Scaffold erection and dismantling
• Fence and gate installation
• Driveway, parking-lot, sidewalk, and patio paving; asphalt coating and sealing
• Outdoor (in-ground) swimming-pool construction; brick-paver and interlocking-block work
• Sandblasting building exteriors; steeplejack work
• Artificial-turf and billboard installation
• Manufactured (mobile) home setup and tie-down

Because it is the residual "other" category, its boundaries are best understood by what it excludes — the adjacent codes that catch the named trades [1]:

Two distinctions are worth memorizing. First, paving a private driveway or parking lot is 238990, but paving a public road is highway construction (237310) — which is why most listed "paving" companies sit mostly outside this code. Second, crane rental with an operator is 238990, but the same crane rented without an operator is equipment rental (532412).

Ownership mix: overwhelmingly private. The 2022 Economic Census counted 41,878 firms operating 42,748 establishments — roughly one location per firm, i.e., single-site local businesses [2][3]. The federal data do not report a precise family-owned / employee-owned / PE-owned / public split; what they show is extreme fragmentation with very low shares for the largest firms [3]. Beyond the local operators, the ownership picture includes corporate strategics in adjacent manufacturing and distribution, family-owned regional platforms (especially in cranes and scaffolding), and a growing set of PE-backed consolidators (see Section 8).

3. How big it is

Federal statistics (our ground-truth figures). These come from different Census products and should not be added into a single market-size denominator:

The concentration figures are the headline: it takes the 50 largest firms combined to reach just 13.6% of revenue, and the top four reach only 5.1% [3]. The HHI (the standard single-number concentration gauge) is suppressed in the federal release, but the CR4 of 5.1% already marks this as one of the least-concentrated industries measured [3]. Receipts have grown substantially over the past cycle — roughly $55 billion in the 2017 Economic Census to $82.8 billion in 2022 [3][6].

The undercount caveat (important here). County Business Patterns counts only employer establishments — those with at least one paid employee [2]. Many of these trades (fencing, sealcoating, small paving and pool work) are dominated by nonemployer sole proprietors working solo or with 1099 help, which Census tracks in a separate Nonemployer Statistics program [5]. Our ground-truth file does not include a 238990 nonemployer count, so we do not state a total-operator figure — but the true number of operating businesses is a large multiple of the 42,748 employer establishments, and total economic activity is higher than the $82.8 billion employer-firm receipts imply. Read that receipts figure as the employer footprint, not the whole industry.

4. The investable universe

There is no pure-play public company in NAICS 238990. The industry is too fragmented and too small-scale at the operator level for a listed pure play. Public companies typically span several trades, report by operating segment rather than NAICS code, and usually sit in adjacent categories. So public exposure is a proxy, not the thing itself. The Engineering News-Record (ENR) "Top 600 Specialty Contractors" ranking makes the same point — large firms compete across many specialty categories that no single NAICS code captures [14]. Revenue figures below are approximate and reflect recent fiscal years.

Closest to 238990 end markets (pools & private paving/site work):

Broader listed specialty-contractor proxies (mostly adjacent/excluded trades, but their crews perform crane, scaffold, access, and site work that overlaps 238990):

Read these tables as "adjacent exposure," not "the industry on public markets." SWIM and POOL ride pool demand but earn their money in the factory and warehouse, not on the jobsite; ROAD's economics are dominated by state departments of transportation, not homeowner driveways; and the large-cap infrastructure names (PWR, EME, FIX, PRIM, MYRG, APG) are mostly in the electrical/mechanical trades that 238990 explicitly excludes, even though they mobilize cranes, scaffolds, and access equipment.

Where the biggest genuinely-238990 operators live — private/other owners. Notably, some of the largest true-238990 businesses (crane rental with operator, scaffolding, heavy lift) are private, not public. Representative platforms and disclosed owners:

• BrandSafway — access, scaffolding, forming, shoring, and industrial services; sponsored by Clayton, Dubilier & Rice and Brookfield Business Partners [34].
• ALL Family of Companies — family-owned crane rental and sales platform [35].
• Barnhart Crane & Rigging — family-run crane, rigging, heavy-haul, and engineered-lift company [36].
• Mammoet — heavy lifting and engineered transport, within privately held family group SHV Holdings [37].
• Sarens — crane rental and engineered transport, fully owned by the Sarens family [38].
• Maxim Crane Works — private crane platform; Apollo-affiliated funds announced acquisition of Maxim and AmQuip in 2016 (current ownership should be verified in diligence) [39].
• BETCO Scaffolds — privately owned by the Gilbreath family [40].
• Clayton Homes / HouseSmart Construction — Berkshire Hathaway's manufactured-housing platform with delivery, installation, and site-construction capabilities [41].

Alongside these are tens of thousands of independent local contractors and a growing set of PE-backed roll-ups in pool service, paving/sealcoating, fencing, and broader residential "home services." For most investors, the real access route to 238990 is private (Section 10), not a brokerage account.

5. How the money works

These are project-based, labor-and-materials businesses, and the economics differ sharply by sub-trade. Two archetypes dominate:

• Labor-led contractors (fencing, paving, pools, sealcoating) make money from crew productivity, billable hours, accurate estimating, and repeat customers. Many need only a truck, hand tools, and a crew — low fixed capital, high returns for a competent operator, but also endless new entrants.
• Equipment-heavy contractors (crane rental, scaffolding, rigging) make money from fleet utilization, rental rates, maintenance, transport, and asset resale value. Higher barriers (capital, licensing, safety records) mean better and more durable pricing.

The metrics that matter are the construction-contractor set — not manufacturing or utility metrics:

• Bid win rate and backlog. Revenue is jobs won × job size. A healthy signed backlog smooths seasonal, lumpy order flow.
• Gross margin per job and crew (or fleet) utilization. Specialty trades overall run net margins in roughly the 7%–8.5% range, generally better than general contractors' ~5%–6% [8]. But the easy-entry 238990 trades (fencing, sealcoating, basic paving) sit at the thin end because price competition compresses margins; licensed or hazardous niches (crane work, steeplejack) hold better pricing.
• Materials pass-through and input costs. Asphalt (an oil derivative), concrete/aggregate, steel and vinyl (fence), and fiberglass/liners (pools) are the big variable costs. On fixed-price bids, input inflation between bid and build is a direct hit to margin [8].
• Change orders. Scope changes are a profit center — well-run contractors mark change orders up meaningfully above their base-bid markup [8]. Unapproved or disputed change orders are the flip side of that risk.
• Cash flow: deposits, progress billing, retainage. Residential jobs often take a deposit up front; commercial/GC jobs pay on progress billings with retainage (typically 5%–10% held until completion). Revenue is often recognized over time as work progresses while cash arrives on a different schedule, so progress billings, retainage, and "pay-if-paid" clauses can leave a profitable contractor cash-poor during growth [30][33].
• Recurring revenue where it exists. Pure installation is one-and-done, but maintenance streams — pool cleaning and opening/closing, sealcoating re-do cycles, fence repair, industrial outage and access services — are the prize because they are recurring and higher-margin. This is a major reason roll-ups target service, not just install.

Seasonality and weather run through all of it: paving, pools, and fencing peak spring–summer and slow (or stop) in winter and rain.

What to track (public or private): backlog and remaining performance obligations; work-in-progress (WIP) schedules and gross-profit fade on completed jobs; change orders and claims; billings, retainage, contract assets and liabilities; operating cash flow versus reported earnings; fleet utilization and maintenance capital spending; and employee turnover, injury rates, and surety (bonding) capacity.

6. What drives demand

Demand is local, project-specific, and uneven across the code — which is why it spans both the consumer housing cycle and the industrial/infrastructure cycle:

• Housing turnover and remodeling. New owners fence yards, repave driveways, and add pools; discretionary outdoor projects track home equity, consumer confidence, and mortgage rates. High rates that freeze home sales are a headwind; falling rates unlock activity [9][12].
• New residential and nonresidential construction. Subdivisions need fencing and paving; commercial sites need parking lots, billboards, and crane work [9].
• Infrastructure and public spending. Roads, utilities, bridges, water and power systems create work for lifting, access, fencing, and site-service firms — though public highway paving itself sits outside 238990, so separate direct-code exposure from adjacent infrastructure exposure [1].
• Electricity, advanced manufacturing, and data centers. Grid upgrades, substations, semiconductor plants, and large-load data centers drive site development, crane, concrete, fencing, and access work; names like Quanta and Sterling flag these as key markets [25][28].
• Industrial maintenance and outages. Refineries, power plants, and factories need cranes, scaffolding, rigging, and outage services — demand tied to industrial capital spending and operating schedules more than to housing [36][37].
• Reinvestment/replacement cycles. Asphalt needs sealing every few years and repaving eventually; fences and pool liners wear out; freeze-thaw climates drive repair. This creates baseline, less-cyclical maintenance demand, and severe weather can create both emergency demand and delays.
• Geography and wealth effects. Pools concentrate in the Sun Belt and are genuinely cyclical — they boomed in 2020–2022 and normalized as rates rose, now leaning on Sun Belt migration and replacement rather than a fresh install surge [12].

For broad context (not a direct 238990 measure): the Census Bureau reported ~$858 billion of total U.S. construction spending over the first five months of 2026, about 2.7% below the comparable 2025 period — a reminder that the wider construction backdrop has softened [7].

7. Regulation

The regulatory load is operational — safety, environmental, wage, and licensing rules — rather than any industry-wide price control.

• Worker safety (OSHA). The Occupational Safety and Health Administration regulates the hazards central to these trades: cranes and derricks (power-operated equipment that hoists, lowers, or moves suspended loads) [15]; scaffolds (capacity, design, inspection, use) [16]; fall protection, which generally applies to unprotected edges at least six feet above a lower level [17]; and respirable crystalline silica from sandblasting and concrete cutting [18].
• Environmental permits. The Environmental Protection Agency's (EPA) National Pollutant Discharge Elimination System (NPDES) generally requires stormwater permitting for construction that disturbs at least one acre, including smaller projects within a larger common plan of development [19]. Volatile-organic-compound (VOC) limits also apply to many asphalt coatings and sealants.
• Prevailing wage on public work. The Davis–Bacon and Related Acts (DBRA) generally require prevailing wages on covered federally funded or assisted construction; the Davis–Bacon Act applies to covered federal or D.C. contracts above $2,000 [20].
• Bonds and insurance. Under the Federal Acquisition Regulation, the Miller Act generally requires performance and payment bonds for federal construction contracts above $150,000; contracts between $35,000 and $150,000 require specified payment protections [21].
• Pool safety. In-ground pools face barrier/fencing codes and the federal Virginia Graeme Baker Pool and Spa Safety Act (anti-entrapment drain standards, administered by the Consumer Product Safety Commission) [22].
• Manufactured-home setup follows the U.S. Department of Housing and Urban Development (HUD) Manufactured Home Construction and Safety Standards and installation program [23].
• State and local rules. Contractor licensing, surety bonds, building codes, zoning, traffic control, crane permits, and worker-classification (W-2 vs. 1099) and E-Verify requirements vary widely by jurisdiction. A contractor's license coverage, bonding capacity, and clean compliance history can be a material competitive advantage.

8. Competitive dynamics and consolidation

This is one of the most fragmented industries in the U.S. economy — a 5.1% four-firm share and 13.6% for the top 50 [3]. Competition is local and relationship-based because work is performed on-site, equipment must be mobilized, and prequalification with general contractors and public agencies matters. Durable advantages come from local labor and equipment availability, strong safety and insurance records, bonding and working-capital capacity, geographic density that cuts travel and mobilization cost, and the ability to handle complex or time-sensitive work.

Consolidation is happening, but mostly from the outside in:

• Manufacturing and distribution consolidated first — Latham (pools) and Pool Corp (distribution) reached national scale while the installer layer stayed fragmented [26][27].
• Heavy-equipment sub-trades have real scale players — the largest crane, rigging, and scaffolding platforms (BrandSafway, Mammoet, Sarens, Barnhart, ALL, Maxim, BETCO) are national or global, mostly private [34][35][36][37][38][39][40].
• Private-equity roll-ups are actively combining local operators in pool service, paving/sealcoating, fencing, and residential home services. The thesis: buy small firms at low multiples, professionalize purchasing/estimating/insurance/back-office, cluster them regionally for density, add recurring maintenance revenue, and re-rate the combined platform.

But no single consolidation thesis fits the whole code. Crane rental, scaffolding, pools, fencing, paving, and mobile-home setup have different customers, assets, seasonality, and barriers to entry. A roll-up can create scale, but poor integration, excessive leverage, or the loss of local operating talent can destroy value.

9. Risks

• Cyclicality and rates. Demand tracks housing turnover, construction and industrial capital spending, and discretionary budgets; high mortgage rates and recessions cut the high-ticket work (pools) hardest [9][12].
• Execution risk. A mistaken bid, labor overrun, defective work, delay, or disputed change order can erase a project's profit.
• Input-cost inflation. Asphalt/oil, steel, lumber, concrete, equipment, and insurance can rise faster than fixed-price contract prices [8].
• Labor shortage and wage inflation. The trades face a persistent skilled-labor shortfall — industry estimates put the gap near 439,000 workers in 2025, rising toward ~499,000 in 2026 — driven by retirements and thin apprenticeship pipelines [10].
• Working-capital and counterparty risk. Retainage, slow-paying general contractors and developers, and "pay-if-paid" clauses create financing needs and expose subs to a counterparty's insolvency mid-project.
• Equipment risk. Crane and scaffold businesses face utilization, maintenance, transport, obsolescence, and accident exposure.
• Customer concentration. Dependence on one general contractor, developer, industrial customer, or public agency.
• Liability, safety, and regulatory risk. Structural failures, pool-safety incidents, falls, and silica exposure carry real legal and insurance cost; permitting, wage, stormwater, or licensing violations can bring fines, litigation, or disqualification.
• Small-operator fragility and commoditization. Many operators are undercapitalized, and in the easiest-entry trades differentiation is hard and price wars are common.
• Acquisition risk. PE-backed platforms can improve operations, but leverage and aggressive add-on acquisitions raise downside risk.
• Data risk. Employer statistics omit nonemployer businesses, and the low concentration for the broad code can conceal much higher concentration within a specific local niche.

10. How to invest, and the outlook

Public routes (indirect only). There is no pure play. Use the NAICS code as a starting point, not an investable definition, and screen listed names by: share of revenue from the relevant trade; end-market mix (housing vs. industrial vs. infrastructure vs. maintenance); backlog quality and conversion; fixed-price vs. reimbursable contract mix; organic vs. acquisition growth; gross-margin stability and project write-downs; operating cash flow and working-capital needs; fleet intensity, capital spending, debt, and surety access; and safety and customer concentration. The closest listed exposures are pool-related Latham (SWIM) and Pool Corp (POOL), paving/civil Construction Partners (ROAD), and site-work Sterling Infrastructure (STRL); broader specialty-contractor proxies (PWR, EME, FIX, APG, PRIM, MYRG) capture the crane/scaffold/access world but mostly earn their money in adjacent trades. Value these on normalized earnings and cash flow — earnings before interest, taxes, depreciation, and amortization (EBITDA) alongside real free cash flow and required capital spending — not on revenue alone.

Private routes (where the industry really lives). The characteristic way to invest is to own an operator or a platform: buy an established local contractor for its cash flow and crews; build or franchise a regional pool-service, fencing, paving, or crane/scaffold business; provide private credit; or back a PE roll-up. Underwrite at the job level — historical bid-to-actual performance, WIP aging and unapproved change orders, customer and GC concentration, owner dependence and succession, labor and wage structure, equipment ownership/utilization, insurance losses and bonding limits, and normalized EBITDA after replacing owner labor and stripping weak add-backs. Value creation comes from professionalizing operations, adding recurring maintenance, gaining regional density, and moving up to larger commercial or industrial contracts — then exiting at a higher multiple than the individually-acquired shops. Entry cost can be low; the hard part is management, labor, and scaling past the owner-operator ceiling. Private capital can capture control premiums and operational upside, but with less liquidity and more company-specific risk than public securities.

Outlook. Constructive but uneven. On the residential side, the mortgage-rate path and housing-turnover recovery are the biggest swing factors; a modest single-family rebound is widely expected as rates ease, tempered into 2026 by labor shortages and input costs [9][10]. Pool demand has normalized off its 2020–2022 boom and now leans on Sun Belt migration and renovation rather than a fresh install surge [12]. Fencing (~$10–13 billion U.S. market, mid-single-digit growth) and private paving track the same housing and nonresidential cycle [11][13]. On the industrial/infrastructure side, grid investment, advanced manufacturing, large-load data centers, and outage/maintenance work should support the crane, scaffold, and site-service operators. Expect not one uniform industry cycle but a collection of niche markets — and expect the code to stay fragmented for years, with a slowly rising share captured by professionalized, PE-backed platforms. The weakest businesses will be undifferentiated, low-bid operators with thin liquidity, weak safety records, high customer concentration, or heavy equipment debt; the strongest combine a defensible local position, scarce labor, recurring maintenance or outage work, strong cash conversion, and disciplined contract selection.

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Sources

1. U.S. Census Bureau, "2022 NAICS Definition — 238990 All Other Specialty Trade Contractors" (definition, illustrative activities, and cross-references). https://www.census.gov/naics/?details=238990&input=238990&year=2022
2. U.S. Census Bureau, County Business Patterns (CBP), 2023 — establishments, paid employees, and payroll for NAICS 238990. https://www.census.gov/programs-surveys/cbp.html
3. U.S. Census Bureau, 2022 Economic Census — receipts, firm count, and concentration ratios (CR4/CR8/CR20/CR50; HHI suppressed) for NAICS 238990 (EC2200SIZECONCEN). https://data.census.gov/table/ECNSIZE2022.EC2200SIZECONCEN?q=EC2200SIZECONCEN
4. U.S. Small Business Administration, "Table of Size Standards," 2023 ($19 million average annual receipts for NAICS 238990). https://www.sba.gov/document/support-table-size-standards
5. U.S. Census Bureau, "Nonemployer Statistics" (methodology; coverage of businesses without paid employees). https://www.census.gov/programs-surveys/nonemployer-statistics.html
6. IBISWorld, "NAICS 238990 — All Other Specialty Trade Contractors," 2024–2025 (industry overview; prior-cycle receipts). https://www.ibisworld.com/classifications/naics/238990/all-other-specialty-trade-contractors/
7. U.S. Census Bureau, "Construction Spending" (C30, current release), 2026. https://www.census.gov/construction/c30/current/index.html
8. Projul, "Construction Profit Margins by Trade" (specialty-trade net margins and change-order markups), 2026. https://projul.com/blog/construction-profit-margins-guide/
9. Construction Dive, "How contractors can navigate cost pressures, labor shortages and regulatory hurdles in 2026," 2025. https://www.constructiondive.com/news/construction-cost-labor-regulations-2026/808629/
10. Associated Builders and Contractors / HireQuest, "2026 Construction Workforce Outlook" (~439,000 worker gap in 2025, ~499,000 in 2026). https://hirequest.com/insight/2026-construction-workforce-forecast-labor-trends/
11. Grand View Research, "U.S. Fencing Market Size and Share Report," 2025. https://www.grandviewresearch.com/industry-analysis/us-fencing-market
12. Expert Market Research / P&S Intelligence, "U.S. Swimming Pool Construction Market," 2025. https://www.expertmarketresearch.com/reports/united-states-swimming-pool-construction-market
13. Mordor Intelligence, "Asphalt Pavers Market Size & Trends, 2026–2031," 2025. https://www.mordorintelligence.com/industry-reports/asphalt-pavers-market
14. Engineering News-Record, "2025 Top 600 Specialty Contractors," 2025. https://www.enr.com/toplists/2025-Top-600-Specialty-Contractors-Preview
15. Occupational Safety and Health Administration, "Cranes and Derricks in Construction" (29 CFR 1926 Subpart CC). https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926SubpartCC
16. Occupational Safety and Health Administration, "Scaffolds" (29 CFR 1926.451). https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.451
17. Occupational Safety and Health Administration, "Duty to Have Fall Protection" (29 CFR 1926.501). https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.501
18. Occupational Safety and Health Administration, "Respirable Crystalline Silica" (29 CFR 1926.1153). https://www.osha.gov/laws-regs/regulations/standardnumber/1926/1926.1153
19. U.S. Environmental Protection Agency, "Stormwater Discharges from Construction Activities" (NPDES). https://www.epa.gov/npdes/stormwater-discharges-construction-activities
20. U.S. Department of Labor, "Fact Sheet #66: The Davis-Bacon and Related Acts," 2023. https://www.dol.gov/agencies/whd/fact-sheets/66-dbra
21. Federal Acquisition Regulation, "28.102-1 General" (Miller Act bonding thresholds). https://www.acquisition.gov/far/28.102-1
22. U.S. Consumer Product Safety Commission, "Virginia Graeme Baker Pool and Spa Safety Act." https://www.cpsc.gov/Regulations-Laws--Standards/Statutes/The-Virginia-Graeme-Baker-Pool-and-Spa-Safety-Act
23. U.S. Department of Housing and Urban Development, "Manufactured Home Construction and Safety Standards / Installation Program." https://www.hud.gov/program_offices/housing/rmra/mhs/mhshome
24. Construction Partners, Inc. (ROAD), Investor Relations / Annual Report (FY revenue ~$2.8B). https://stockanalysis.com/stocks/road/
25. Sterling Infrastructure, Inc. (STRL), Annual Report on Form 10-K (revenue ~$2.1B; segments). https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000874238&type=10-K
26. Latham Group, Inc. (SWIM), Annual Report on Form 10-K (revenue ~$0.5B). https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001833197&type=10-K
27. Pool Corporation (POOL), "2024 Financial Results" ($5.3B net sales). https://www.nasdaq.com/articles/pool-corporation-reports-2024-financial-results-53-billion-net-sales-and-guidance-2025
28. Quanta Services (PWR), Annual Report on Form 10-K. https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001050915&type=10-K
29. EMCOR Group (EME), Annual Report on Form 10-K. https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000105634&type=10-K
30. Comfort Systems USA (FIX), Annual Report on Form 10-K. https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001035983&type=10-K
31. Primoris Services (PRIM), Annual Report on Form 10-K. https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001361538&type=10-K
32. MYR Group (MYRG), Annual Report on Form 10-K. https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000700923&type=10-K
33. APi Group (APG), Annual Report on Form 10-K. https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001796209&type=10-K
34. BrandSafway, "Investor Information" (access/scaffolding/industrial services; CD&R and Brookfield sponsorship). https://brandsafway.com/investor-information
35. ALL Family of Companies, "About Us" (family-owned crane rental and sales). https://www.allcrane.com/company
36. Barnhart Crane & Rigging, "About Us." https://www.barnhartcrane.com/about/
37. SHV Holdings, "Mammoet" (heavy lifting and engineered transport). https://www.shv.nl/company/mammoet/
38. Sarens, "Sarens Family Becomes 100% Owner of Sarens Group," 2023. https://www.sarens.com/about/news/sarens-family-becomes-100-owner-of-sarens-group.htm
39. Apollo Global Management, "Funds Affiliated with Apollo to Acquire AmQuip Crane Rental and Maxim Crane Works," 2016. https://ir.apollo.com/news-events/press-releases/detail/275/funds-affiliated-with-apollo-global-management-to-acquire
40. BETCO Scaffolds, "About" (Gilbreath family ownership). https://scaffold.com/about/
41. Clayton Homes, "Clayton Announces HouseSmart Construction," 2019 (Berkshire Hathaway manufactured-housing platform). https://www.claytonhomes.com/newsroom/press-releases/Clayton-Homes-Announces-HouseSmart-Construction