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DOT

Department of Transportation contracting by NAICS

The Department of Transportation obligated $13.1B in net prime contract dollars in the 12 months ending Oct 5, 2026. The 69 NAICS markets below cover $12.5B of it.

Largest increases

NAICS markets with the largest dollar growth versus the preceding 12 months.

NAICS marketPrior 12 moLatest 12 moChange
334210 · Telephone Apparatus Manufacturing$245.6M$1.2BUp $1.0B (408.7%)
334511 · Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing$127.3M$1.1BUp $959.3M (753.5%)
541330 · Engineering Services$1.4B$1.8BUp $457.0M (32.9%)
336611 · Ship Building and Repairing$119.7M$575.6MUp $455.9M (380.8%)
541512 · Computer Systems Design Services$326.9M$692.3MUp $365.5M (111.8%)

Largest declines

NAICS markets with the largest dollar decline versus the preceding 12 months.

All DOT NAICS markets

Ranked by net obligations in the latest 12 months.

541330 · Engineering Services

$1.8B
169 prime contractors

334210 · Telephone Apparatus Manufacturing

$1.2B
5 prime contractors

517310 · Telecommunications Resellers

$1.2B
1 prime contractors

334511 · Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing

$1.1B
43 prime contractors

237310 · Highway, Street, and Bridge Construction

$786.7M
110 prime contractors

541512 · Computer Systems Design Services

$692.3M
55 prime contractors

236220 · Commercial and Institutional Building Construction

$657.8M
115 prime contractors

336611 · Ship Building and Repairing

$575.6M
9 prime contractors

541990 · All Other Professional, Scientific, and Technical Services

$557.4M
72 prime contractors

541519 · Other Computer Related Services

$459.0M
149 prime contractors

518210 · Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services

$340.5M
29 prime contractors

541611 · Administrative Management and General Management Consulting Services

$339.7M
178 prime contractors

488111 · Air Traffic Control

$318.6M
5 prime contractors

541511 · Custom Computer Programming Services

$291.7M
89 prime contractors

334111 · Electronic Computer Manufacturing

$201.2M
46 prime contractors

541715 · Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)

$137.1M
100 prime contractors

541513 · Computer Facilities Management Services

$131.6M
8 prime contractors

237130 · Power and Communication Line and Related Structures Construction

$118.9M
49 prime contractors

561210 · Facilities Support Services

$95.1M
32 prime contractors

513210 · Software Publishers

$93.4M
87 prime contractors

541810 · Advertising Agencies

$91.8M
4 prime contractors

337214 · Office Furniture (except Wood) Manufacturing

$78.7M
23 prime contractors

238210 · Electrical Contractors and Other Wiring Installation Contractors

$74.0M
47 prime contractors

488390 · Other Support Activities for Water Transportation

$73.8M
14 prime contractors

334220 · Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing

$70.3M
38 prime contractors

483111 · Deep Sea Freight Transportation

$63.5M
4 prime contractors

334290 · Other Communications Equipment Manufacturing

$59.1M
39 prime contractors

541380 · Testing Laboratories and Services

$58.2M
46 prime contractors

562910 · Remediation Services

$55.9M
27 prime contractors

561621 · Security Systems Services (except Locksmiths)

$52.3M
22 prime contractors

488190 · Other Support Activities for Air Transportation

$46.5M
17 prime contractors

561720 · Janitorial Services

$44.9M
106 prime contractors

561612 · Security Guards and Patrol Services

$42.1M
13 prime contractors

611430 · Professional and Management Development Training

$41.9M
38 prime contractors

335999 · All Other Miscellaneous Electrical Equipment and Component Manufacturing

$35.2M
34 prime contractors

611512 · Flight Training

$32.1M
20 prime contractors

335312 · Motor and Generator Manufacturing

$28.8M
6 prime contractors

334419 · Other Electronic Component Manufacturing

$28.1M
51 prime contractors

541690 · Other Scientific and Technical Consulting Services

$22.2M
27 prime contractors

811210 · Electronic and Precision Equipment Repair and Maintenance

$22.0M
15 prime contractors

238220 · Plumbing, Heating, and Air-conditioning Contractors

$21.7M
58 prime contractors

334519 · Other Measuring and Controlling Device Manufacturing

$21.1M
21 prime contractors

517312 · Wireless Telecommunications Carriers (except Satellite)

$19.8M
4 prime contractors

561110 · Office Administrative Services

$16.2M
16 prime contractors

511210 · Software Publishers

$16.0M
20 prime contractors

541310 · Architectural Services

$15.3M
16 prime contractors

541620 · Environmental Consulting Services

$15.2M
28 prime contractors

811219 · Other Electronic and Precision Equipment Repair and Maintenance

$15.0M
5 prime contractors

541720 · Research and Development in the Social Sciences and Humanities

$14.9M
5 prime contractors

238160 · Roofing Contractors

$14.6M
26 prime contractors

541712 · Research and Development in the Physical, Engineering, and Life Sciences (except Biotechnology)

$12.9M
4 prime contractors

484210 · Used Household and Office Goods Moving

$12.5M
10 prime contractors

238990 · All Other Specialty Trade Contractors

$11.9M
29 prime contractors

334310 · Audio and Video Equipment Manufacturing

$11.5M
10 prime contractors

561990 · All Other Support Services

$11.0M
15 prime contractors

541219 · Other Accounting Services

$10.7M
7 prime contractors

541612 · Human Resources Consulting Services (2007), Human Resources and Executive Search Consulting Services (2002)

$8.7M
16 prime contractors

541211 · Offices of Certified Public Accountants

$8.6M
13 prime contractors

335910 · Battery Manufacturing

$7.2M
8 prime contractors

541910 · Marketing Research and Public Opinion Polling

$7.2M
5 prime contractors

517410 · Satellite Telecommunications

$7.2M
12 prime contractors

334515 · Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals

$7.1M
12 prime contractors

488210 · Support Activities for Rail Transportation

$6.4M
4 prime contractors

561730 · Landscaping Services

$6.4M
73 prime contractors

335311 · Power, Distribution, and Specialty Transformer Manufacturing

$6.3M
5 prime contractors

541618 · Other Management Consulting Services

$6.2M
5 prime contractors

335139 · Electric Lamp Bulb and Other Lighting Equipment Manufacturing

$6.1M
8 prime contractors

423610 · Electrical Apparatus and Equipment, Wiring Supplies, and Related Equipment Merchant Wholesalers

$5.6M
16 prime contractors

519290 · Web Search Portals and All Other Information Services

$5.2M
13 prime contractors

Prime contracts (award types A–D) funded by the Department of Transportation, from USAspending.gov. A market is listed when it had at least $5M in the latest 12 months, $1M in the preceding 12 months, and 10 awards with activity in each period.

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