Largest professional services companies
Every US-listed professional services company we cover, 48 of them, ranked by market capitalisation, with revenue and earnings taken from their SEC filings.
Combined market cap
$61.832 B
0.06% of all US-listed value
Companies
48
Ranked #100 of 152 industries
Average
$1.288 B
Mean market cap per company
| # | Name | Market cap | Close | Session | Country |
|---|---|---|---|---|---|
| 1 | CgiGIB | $16.0B | $69.13 | -0.50% | Canada |
| 2 | Booz Allen HamiltonBAH | $9.10B | $75.65 | -0.83% | United States |
| 3 | GenpactG | $5.69B | $33.85 | -0.12% | Bermuda |
| 4 | Robert HalfRHI | $3.82B | $37.36 | -0.58% | United States |
| 5 | Fti ConsultingFCN | $3.69B | $133.49 | -0.90% | United States |
| 6 | ExponentEXPO | $3.11B | $65.41 | -1.22% | United States |
| 7 | ManpowerGroupMAN | $2.67B | $57.37 | -0.45% | United States |
| 8 | Huron Consulting GroupHURN | $2.54B | $159.91 | +1.30% | United States |
| 9 | InsperityNSP | $1.87B | $48.85 | -2.81% | United States |
| 10 | Astrana HealthASTH | $1.70B | $34.34 | -2.19% | United States |
| 11 | ICF InternationalICFI | $1.50B | $83.68 | +0.12% | United States |
| 12 | EverforthEFOR | $1.36B | $33.15 | +2.69% | United States |
| 13 | Amn Healthcare ServicesAMN | $1.31B | $33.91 | -1.82% | United States |
| 14 | KforceKFRC | $932.5M | $52.07 | +0.15% | United States |
| 15 | Barrett Business ServicesBBSI | $790.3M | $32.61 | -1.95% | United States |
| 16 | Bowman Consulting GroupBWMN | $737.8M | $42.56 | +0.00% | United States |
| 17 | Rmr GroupRMR | $603.7M | $18.82 | -2.59% | United States |
| 18 | OnterrisONT | $597.7M | $17.02 | +0.47% | United States |
| 19 | Kelly ServicesKELYA | $571.3M | $16.45 | -1.26% | United States |
| 20 | Roma Green FinanceROMA | $531.3M | $8.92 | -0.89% | Hong Kong |
| 21 | TrueBlueTBI | $298.7M | $9.81 | -1.31% | United States |
| 22 | Rcm TechnologiesRCMT | $286.8M | $40.33 | -1.15% | United States |
| 23 | TSSTSSI | $261.9M | $9.28 | -0.21% | United States |
| 24 | Information Services GroupIII | $259.0M | $5.35 | +0.00% | United States |
| 25 | Hackett GroupHCKT | $257.5M | $10.35 | -0.96% | United States |
| 26 | HireQuestHQI | $254.4M | $18.30 | +7.21% | United States |
| 27 | ATIFAUC | $194.1M | $8.77 | -4.67% | United States |
| 28 | RTB DigitalRTB | $142.3M | $9.84 | +3.04% | United States |
| 29 | Mastech DigitalMHH | $87.7M | $7.30 | +2.10% | United States |
| 30 | EnigmatigEGG | $75.5M | $2.71 | -4.91% | Singapore |
| 31 | TTECTTEC | $60.6M | $1.23 | -1.60% | United States |
| 32 | CastellumCTM | $60.0M | $0.63 | -1.16% | United States |
| 33 | DLHDLHC | $55.8M | $3.85 | -3.02% | United States |
| 34 | BgsfBGSF | $53.0M | $4.96 | -0.80% | United States |
| 35 | rYojbabaRYOJ | $42.9M | $3.71 | +1.09% | Japan |
| 36 | Zenta GroupZTG | $41.7M | $1.73 | +0.00% | China |
| 37 | Star EquitySTRR | $38.1M | $10.33 | +4.29% | United States |
| 38 | Aeries TechnologyAERT | $36.8M | $7.02 | +1.74% | United States |
| 39 | Acco GroupACCL | $36.6M | $2.63 | -5.40% | Hong Kong |
| 40 | T3 DefenseDFNS | $22.4M | $7.87 | -5.75% | United States |
| 41 | YYForceYFOR | $21.2M | $1.65 | -6.25% | Singapore |
| 42 | Greenpro CapitalGRNQ | $20.0M | $11.05 | +8.81% | China |
| 43 | ACCESS NewswireACCS | $18.6M | $4.85 | -1.62% | United States |
| 44 | Lichen InternationalLICN | $17.1M | $1.04 | +0.00% | China |
| 45 | Hang Feng Technology InnovationFOFO | $13.3M | $1.76 | -3.82% | Hong Kong |
| 46 | CISO GlobalCISO | $11.0M | $0.24 | -2.94% | United States |
| 47 | Addentax GroupATXG | $4.05M | $3.44 | +1.48% | China |
| 48 | Intelligent GroupINTJ | $4.03M | $2.62 | -4.73% | Hong Kong |
All 48 companies. One row per company, with secondary share classes folded into their primary listing. Updated 24 Sept 2026.
Sectors professional services companies sit in
Other industries
Semiconductors 101Computer Software: Programming Data Processing 77Computer Software: Prepackaged Software 234Computer Manufacturing 10Biotechnology: Pharmaceutical Preparations 500Major Banks 246Industrial Machinery/Components 211Catalog/Specialty Distribution 31Business Services 93Commercial Banks 35Auto Manufacturing 29Integrated oil Companies 18Investment Bankers/Brokers/Service 68Oil & Gas Production 116Real Estate Investment Trusts 177Department/Specialty Retail Stores 14Telecommunications Equipment 82Electronic Components 21Beverages (Production/Distribution) 36Finance: Consumer Services 162Electric Utilities: Central 60Consumer Electronics/Appliances 23Biotechnology: Biological Products (No Diagnostic Substances) 160Natural Gas Distribution 29All industries β
Figures come from SEC filings and daily market prices. Companies listed only outside the US are not covered: see methodology.