Other Support Activities for Transportation (United States) — NAICS 4889

1. Overview

NAICS 4889 is an industry group in the North American Industry Classification System (NAICS) — the U.S. government's standard scheme for grouping businesses. It sits inside the "488" family, which covers services that help freight and passengers move without owning the truck, ship, train, or plane. Code 4889 is the leftover box: everything in transportation support not already assigned to air, rail, water, or road support, freight brokering, or warehousing [4].

The one thing to know about this level is that it has exactly one child industry, 48899, so the two are effectively identical — same firms, same revenue, same everyone. This page is deliberately short: it gives the level's own federal figures and then hands you to the full 48899 primer, which does the real work of explaining a code that quietly houses two utterly different businesses.

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

An industry group can hold several 5-digit industries; NAICS 4889 holds only one. There is no aggregation to do — 4889 is 48899 wearing a shorter number. The federal statistics for the two are the same numbers, which is why this page can be brief and why every figure below is also the 48899 figure.

That single child, 48899 — Other Support Activities for Transportation, is itself an odd two-part code, and the split matters even though it does not change the rollup:

• 488991 Packing and Crating — thousands of small, mostly family-owned shops that build custom wooden crates and pack high-value or oversized goods (machine tools, jet engines, MRI machines, fine art) so they survive shipment [4].
• 488999 All Other Support Activities — the federal system's catch-all drawer: liquefied natural gas (LNG) export/import terminals, independently operated pipeline and liquids terminals, the arrangement of non-emergency medical transportation (NEMT), vanpools, and staging stockyards [1].

By the federal count, this level is packing and crating — crating shops are roughly 97% of revenue and 98% of firms — while the residual 488999 bin is tiny by count but carries outsized, high-wage payroll because individual LNG and pipeline terminals get facility-tagged into it [1][2]. For the full breakdown of the two children, how they diverge, and where value actually sits, read the 48899 primer. Everything below is the level's own ground-truth size.

3. Size (this level's rollup figures + undercount caveat)

The figures below are from our federal file for NAICS 4889 and are identical to 48899's. As always, reference years differ (2022 Economic Census for revenue/firms/concentration; 2023 County Business Patterns for establishments, employment, and payroll), so they should not be blended into a single-year margin, growth, or productivity number.

CR4/CR8/CR20/CR50 = the combined revenue share of the largest 4, 8, 20, and 50 firms. HHI = Herfindahl-Hirschman Index, a concentration score that sums the squared market shares of all firms; below ~1,500 counts as "unconcentrated."

This is a genuinely small industry by revenue — about $3.4 billion, roughly the size of one mid-cap company — and the concentration figures (HHI 95.9, top 4 = 14%) describe an unconcentrated market that is, in practice, the fragmented packing-and-crating child [2].

Undercount caveat — the reported number is a floor, not the footprint. The $3.44 billion revenue line understates real activity for two reasons: in packing and crating, one-person no-payroll operators are not in these employer counts and huge volumes of crating happen in-house at manufacturers and movers; and in the residual bin, the LNG and pipeline terminals that drive the payroll are booked under their energy parents' codes, so the activities named here (tens of billions in LNG infrastructure, a ~$13–18 billion NEMT market) are worth far more than the code shows [1][2][5][17][21]. Our federal file carries no nonemployer count, government-activity estimate, margin, or growth rate for this level, so this page states none.

4. Investable universe (where value concentrates)

There is no clean public pure play at this level and no exchange-traded fund (ETF) that tracks it. Because the level is 48899, the map is the same: value concentrates in opposite places depending on which child you mean.

• Packing and crating (488991) — value is private and fragmented. No U.S.-listed company primarily does this work; the closest is Deufol SE (Xetra, Germany), a near-pure foreign micro-cap, with only incidental exposure inside diversified names like UFP Industries (Nasdaq: UFPI) and Iron Mountain (NYSE: IRM). The real ownership is thousands of private shops, franchise networks, and private-equity roll-ups [9][10][11][12][14].
• The residual bin (488999) — value is public, but only under energy labels. LNG exporters (Cheniere/NYSE: LNG, Cheniere Partners/NYSE: CQP, Venture Global/NYSE: VG) and large midstream operators reach the terminal activities; NEMT has effectively left the public market since ModivCare's 2025 bankruptcy and private re-emergence [15][16][19][20].

For the full company-by-company table, see the 48899 primer.

5. How the money works

The level has no single business model because its one child runs two engines [4][15][19]:

• Packing and crating is an asset-light job shop: sell skilled labor and engineered materials (lumber, plywood, foam) at a markup, with pricing power coming from certifications few shops hold (export heat-treatment, military-spec, hazmat). Profit turns on labor utilization; lumber is passed through with a lag.
• The residual bin splits into an asset-heavy toll model (LNG and liquids terminals sign 15–20-year, take-or-pay capacity contracts; stockyards charge per-head yardage) and an asset-light arrangement model (NEMT brokers sign capitated Medicaid contracts, pay providers per trip, and keep a thin spread).

6. Demand drivers

Demand is entirely derived and activity-specific — there is no single "4889 demand" [4][17][18][21][25]:

• Packing and crating rises and falls with industrial capital spending and U.S. goods exports (semiconductor tools, aerospace/defense, factory relocations, reshoring), which makes it cyclical.
• The residual bin is set activity by activity: LNG terminals track global gas-price spreads over the Henry Hub benchmark and export permitting (the U.S. exported a record ~111 million metric tons of LNG in 2025); NEMT tracks Medicaid enrollment and an aging population but is priced by cash-strapped states.

7. Regulation

There is no financial or securities regulation of these services and no single regulator; oversight is per activity [6][7][8][22][23]. In crating, rules are a source of pricing power: wood-packaging heat-treatment (ISPM 15, enforced by USDA APHIS), hazardous-materials rules (DOT PHMSA, FAA), and military packaging standards (via the Defense Logistics Agency) all gate who can do the higher-margin work. In the residual bin, regulation is a gate on multi-billion-dollar projects: LNG terminals answer to the Department of Energy, FERC, PHMSA, and the Coast Guard; NEMT to state Medicaid agencies under CMS; stockyards to USDA's Packers and Stockyards Act.

8. Consolidation

The two children consolidate on opposite trajectories, but never as a unit [2][15][16][24]. Packing and crating is barely consolidated (top 4 firms = ~14% of revenue) and consolidating slowly from a very low base via roll-ups and franchises — a long runway for buyers of small shops. The economically significant residual pieces are already oligopolies: LNG export is a concentrated, capital- and permit-gated club led by Cheniere, and infrastructure funds are the natural buyers of independent terminals. The level's headline numbers (top 4 = 14%, HHI ≈ 96) reflect the fragmented crating child and should not be read as describing the concentrated energy activities inside it.

9. Risks

The main risks are inherited straight from 48899 [4][19][22]: cyclicality in crating (exposed to industrial capex and export downturns); permitting and policy risk for LNG (delays or reversals can strand multi-billion-dollar projects); reimbursement risk in NEMT (thin margins hostage to Medicaid rates — the cause of ModivCare's bankruptcy); input-cost and commodity volatility (lumber, freight, fuel, global gas spreads); and a distinctive classification and data risk — there is no clean "4889" security or index, and the code's own statistics miss small and government operators, so anyone using it as an investment screen will misjudge the size and miss the real players.

10. How to invest and outlook

The level is a map, not a ticker — and because 4889 equals 48899, the guidance is the same: decide which child you actually want first. To own packing and crating you go private (buy, build, franchise, or back a roll-up; the only near-pure listing, Deufol, is a foreign micro-cap) [9][12][14]. To own the residual bin you buy the activity, not the label — LNG and midstream energy names for terminals, with no meaningful public NEMT pure-play left [15][16][19].

Outlook — a split verdict, by design. Packing and crating should be durable but uneven, riding project-driven tailwinds (semiconductor and data-center capex, aerospace/defense, reshoring) rather than a smooth trend [25]. The residual bin is dominated by one big growth story, the U.S. LNG build-out — the U.S. is already the world's largest LNG exporter, with exports projected to rise nearly 30% by 2027 [17][18] — while NEMT is steady but margin-pressured. The honest conclusion: 4889 is a poor lens and a good reminder that its statistics describe small crating shops while its real growth lives in energy terminals booked under other codes. For the complete analysis, read the 48899 primer.

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Sources

1. U.S. Census Bureau, County Business Patterns 2023 — NAICS 48899 and children (488991, 488999): establishments, employment, annual and first-quarter payroll, 2023. https://www.census.gov/programs-surveys/cbp.html
2. U.S. Census Bureau, 2022 Economic Census — Concentration by Largest Firms, NAICS 48899 and children (firms, receipts, CR4/CR8/CR20/CR50, HHI), 2022. https://www.census.gov/programs-surveys/economic-census.html
3. U.S. Small Business Administration, Table of Small Business Size Standards (NAICS 488991 = $34 million; 488999 = $25 million), 2023. https://www.sba.gov/document/support-table-size-standards
4. U.S. Census Bureau, 2022 NAICS Definitions — 488991 Packing and Crating and 488999 All Other Support Activities for Transportation (scope, index examples, exclusions), 2022. https://www.census.gov/naics/
5. U.S. Census Bureau, County Business Patterns coverage and Nonemployer Statistics (employer vs. nonemployer; Economic Census excludes government establishments), current. https://www.census.gov/programs-surveys/nonemployer-statistics.html
6. USDA Animal and Plant Health Inspection Service (APHIS), Wood Packaging Material — ISPM 15 (heat treatment, debarking, IPPC mark; import enforcement), 2024. https://www.aphis.usda.gov/plant-imports/wood-packaging-material
7. U.S. DOT Pipeline and Hazardous Materials Safety Administration (49 CFR) and Federal Aviation Administration, Shipping hazardous materials / dangerous goods (IATA and IMDG codes), current. https://www.faa.gov/hazmat/safecargo/how_to_ship
8. U.S. Defense Logistics Agency, DLA Packaging (MIL-STD-2073 / MIL-STD-129 vendor packaging requirements), 2024. https://www.dla.mil/Logistics-Operations/Packaging/
9. Deufol SE (Xetra, Germany), Custom Crating, Domestic and Export Industrial Packaging; Investor Relations, 2026. https://www.deufol.com/crating-export
10. Crozier Fine Arts / Iron Mountain Incorporated (NYSE: IRM), Crozier Fine Arts — Company and Services, 2024. https://www.crozierfinearts.com/company
11. UFP Industries (Nasdaq: UFPI), UFP Packaging — industrial packaging, pallets and crates, 2025. https://ufpi.com/our-businesses/ufp-packaging/
12. Craters & Freighters, About / Company History / Franchise Ownership (locations, founding, franchise model), 2025. https://www.cratersandfreighters.com/about/company-history/
13. Packaging Strategies, TransPak Expands East Coast Presence with Acquisition of Reid Packaging, 2024. https://www.packagingstrategies.com/articles/105159-transpak-expands-east-coast-presence-with-acquisition-of-reid-packaging
14. Wynnchurch Capital, FCA Packaging portfolio company (custom crates, on-site packing, 34 U.S. locations at acquisition), 2022. https://www.wynnchurch.com/portfolio/fca
15. Cheniere Energy, Inc. (NYSE: LNG / CQP), Cheniere Reports Fourth Quarter and Full Year 2024 Results, 2025. https://lngir.cheniere.com/news-events/press-releases/detail/314/cheniere-reports-fourth-quarter-and-full-year-2024-results
16. CNBC, Venture Global closes below IPO price in disappointing debut (NYSE: VG), 2025. https://www.cnbc.com/2025/01/24/venture-global-vg-initial-public-offering-ipo.html
17. U.S. Energy Information Administration, U.S. natural gas exports to grow nearly 30% by 2027 as LNG facilities ramp up, 2026. https://www.eia.gov/todayinenergy/
18. OilPrice.com, U.S. LNG Exports Break 100 Million Tons in Record 2025, 2026. https://oilprice.com/Latest-Energy-News/World-News/
19. Healthcare Dive, ModivCare files for bankruptcy with over $1.4B in debt, 2025. https://www.healthcaredive.com/news/modivcare-files-bankruptcy/758538/
20. Business Wire, Modivcare Successfully Completes Financial Restructuring, Reducing Debt by More Than 85%, 2025. https://www.businesswire.com/news/home/20251229414980/en/
21. Mordor Intelligence, Non-Emergency Medical Transportation Market — Size, Share & Research Report (~$13-18 billion), 2025. https://www.mordorintelligence.com/industry-reports/non-emergency-medical-transportation-market
22. Center for Strategic and International Studies (CSIS), U.S. LNG Exports: DOE and FERC Roles and Boundaries, current. https://www.csis.org/analysis/us-lng-exports-doe-and-ferc-roles-and-boundaries
23. U.S. Department of Agriculture, Agricultural Marketing Service, Packers and Stockyards Act, current. https://www.ams.usda.gov/rules-regulations/packers-and-stockyards-act
24. IFM Investors, IFM Investors Completes Acquisition of Buckeye Partners, L.P., 2019. https://www.ifminvestors.com/
25. Future Market Insights, Semiconductor Capital Equipment Market — 2025 capex estimate (~$185 billion), 2025. https://www.futuremarketinsights.com/reports/semiconductor-capital-equipment-market