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5,643 companies in Construction in Maryland.
Explore 5,643 Construction in Maryland listed with contact details, employee size, revenue, and NAICS/SIC codes. Compare suppliers and service providers side by side and reach the right companies directly, or view the same industry in Construction in California, Construction in Florida, Construction in Texas.
From painting, roofing and glass contractors to general builders and structural steel fabricators, these are the construction companies on file in Maryland. Open any profile for its location, size and NAICS code. Quote-to-order rates for these segments: Manufacturing sales by segment, 2026.
Of the 5,635 with a known headcount, 91% employ 1-50 people and 16 employ more than 1,000. 91% of those reporting revenue are under $10M, while 10 report more than $1B. The largest by revenue include ST Engineering (Singapore), Keller Management Services LLC (Hanover) and Clark Construction Group LLC (Bethesda).
Largest Construction in Maryland companies by revenue
The highest-revenue companies in this directory. Open any profile for its full firmographics.
| # | Company | Location | Employees | Revenue |
|---|---|---|---|---|
| 1 | ST Engineering | Singapore | 22,494 | $7.7B |
| 2 | Keller Management Services LLC | Hanover | 9,544 | $6.1B |
| 3 | Clark Construction Group LLC | Bethesda | 4,400 | $6B |
| 4 | The Bozzuto Group | Greenbelt | 3,000 | $3.1B |
| 5 | Condor Group | Rockville | 3,800 | $2.4B |
| 6 | Power Solutions LLC | Bowie | 1,800 | $1.1B |
| 7 | James G Davis Construction Corp | Rockville | 500 | $1.1B |
| 8 | Miller & Long Co Inc | Bethesda | 1,498 | $955M |
| 9 | Harkins Builders Inc | Columbia | 750 | $725M |
| 10 | Fidelity Engineering LLC | Sparks | 2,600 | $705M |
These pages show the first 480 of 5,643 companies. Narrow the list with the filters above or open one of the related lists below to see the rest.
Construction in Maryland companies by size and revenue
| Employees | Companies | Share |
|---|---|---|
| 1-50 | 5,141 | 91.2% |
| 51-200 | 367 | 6.5% |
| 201-1000 | 111 | 2.0% |
| 1001-5000 | 12 | 0.2% |
| 5001+ | 4 | 0.1% |
| Revenue | Companies | Share |
|---|---|---|
| Under $10M | 5,080 | 90.9% |
| $10M-$50M | 396 | 7.1% |
| $50M-$250M | 84 | 1.5% |
| $250M-$1B | 16 | 0.3% |
| $1B+ | 10 | 0.2% |
Share is of companies with a known value — 5,635 with headcount and 5,586 with revenue on file, as of Jul 17, 2026.
Frequently asked questions
How many Construction in Maryland are there?
There are 5,643 Construction in Maryland in the directory. Use the filters to narrow by employee count, revenue, or NAICS/SIC code.
How many large companies are in Construction in Maryland?
39 of the 5,643 companies in Construction in Maryland employ more than 500 people, and 10 report over $1 billion in annual revenue. See the size and revenue breakdown above for the full distribution.
What size are most Construction in Maryland companies?
Most are small and mid-sized businesses: the size and revenue tables above show the full spread, from under $10M up to $1B+, across the 5,586 companies with revenue on file.
What information is included for each company?
Every listing includes the company name, location, website, employee size, revenue range where available, and NAICS/SIC classification, with a link to the full profile.
Where does this directory come from?
Listings are compiled and maintained by Factur, a sales and marketing firm for B2B manufacturers. Any company can request an update or removal from its profile page.