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
$65.124 B
0.07% of all US-listed value
Companies
48
Ranked #101 of 152 industries
Average
$1.357 B
Mean market cap per company
| # | Name | Market cap | Close | Session | Country |
|---|---|---|---|---|---|
| 1 | CgiGIB | $17.3B | $74.74 | +0.77% | Canada |
| 2 | Booz Allen HamiltonBAH | $9.15B | $76.05 | +2.87% | United States |
| 3 | GenpactG | $5.81B | $34.29 | -5.17% | Bermuda |
| 4 | Robert HalfRHI | $4.37B | $42.74 | +5.06% | United States |
| 5 | Fti ConsultingFCN | $4.18B | $151.43 | +0.37% | United States |
| 6 | ExponentEXPO | $3.24B | $66.79 | +0.88% | United States |
| 7 | ManpowerGroupMAN | $2.63B | $56.60 | +2.28% | United States |
| 8 | Huron Consulting GroupHURN | $2.42B | $152.05 | +1.30% | United States |
| 9 | InsperityNSP | $2.01B | $52.52 | +2.46% | United States |
| 10 | Astrana HealthASTH | $1.99B | $35.76 | +4.78% | United States |
| 11 | ICF InternationalICFI | $1.72B | $95.00 | +11.36% | United States |
| 12 | Amn Healthcare ServicesAMN | $1.40B | $36.00 | +16.88% | United States |
| 13 | EverforthEFOR | $1.32B | $32.22 | +2.06% | United States |
| 14 | KforceKFRC | $1.06B | $59.09 | +0.94% | United States |
| 15 | Barrett Business ServicesBBSI | $814.9M | $33.18 | +0.27% | United States |
| 16 | Rmr GroupRMR | $624.0M | $19.45 | +3.46% | United States |
| 17 | OnterrisONT | $596.7M | $16.51 | +9.41% | United States |
| 18 | Roma Green FinanceROMA | $530.1M | $8.90 | +0.22% | Hong Kong |
| 19 | Kelly ServicesKELYA | $526.6M | $15.19 | -2.75% | United States |
| 20 | Bowman Consulting GroupBWMN | $476.7M | $27.23 | +1.04% | United States |
| 21 | TSSTSSI | $316.1M | $11.26 | +4.74% | United States |
| 22 | TrueBlueTBI | $310.5M | $10.20 | +0.00% | United States |
| 23 | Hackett GroupHCKT | $286.8M | $11.53 | +3.69% | United States |
| 24 | Information Services GroupIII | $248.3M | $5.19 | +3.80% | United States |
| 25 | RTB DigitalRTB | $231.5M | $17.00 | +6.85% | United States |
| 26 | Rcm TechnologiesRCMT | $208.2M | $29.38 | +2.98% | United States |
| 27 | HireQuestHQI | $184.6M | $13.28 | +4.16% | United States |
| 28 | ATIFAUC | $135.2M | $7.00 | -0.85% | United States |
| 29 | TTECTTEC | $124.1M | $2.55 | -1.92% | United States |
| 30 | Zenta GroupZTG | $108.6M | $9.20 | -8.46% | China |
| 31 | EnigmatigEGG | $96.1M | $3.45 | +0.58% | Singapore |
| 32 | T3 DefenseDFNS | $95.9M | $37.95 | -17.50% | United States |
| 33 | Mastech DigitalMHH | $93.1M | $7.76 | -2.76% | United States |
| 34 | DLHDLHC | $69.9M | $4.82 | -0.82% | United States |
| 35 | BgsfBGSF | $60.0M | $5.62 | -0.71% | United States |
| 36 | CastellumCTM | $58.2M | $0.62 | -22.75% | United States |
| 37 | rYojbabaRYOJ | $57.1M | $4.94 | +1.86% | Japan |
| 38 | Star EquitySTRR | $41.8M | $11.30 | -1.57% | United States |
| 39 | Aeries TechnologyAERT | $40.4M | $7.04 | +1.29% | United States |
| 40 | Acco GroupACCL | $40.2M | $2.89 | +1.76% | Hong Kong |
| 41 | ACCESS NewswireACCS | $26.3M | $6.77 | +0.52% | United States |
| 42 | Greenpro CapitalGRNQ | $20.4M | $11.27 | +12.65% | China |
| 43 | Lichen InternationalLICN | $19.9M | $1.21 | +1.68% | China |
| 44 | Hang Feng Technology InnovationFOFO | $18.5M | $2.45 | +3.59% | Hong Kong |
| 45 | CISO GlobalCISO | $12.1M | $0.27 | -0.45% | United States |
| 46 | YY GroupYYGH | $9.19M | $1.12 | -2.61% | Singapore |
| 47 | Intelligent GroupINTJ | $5.19M | $3.38 | +16.78% | Hong Kong |
| 48 | Addentax GroupATXG | $4.07M | $3.95 | +8.52% | China |
All 48 companies. One row per company — secondary share classes are folded into their primary listing. Updated 9 Aug 2026.
Sectors professional services companies sit in
Other industries
Semiconductors 100Computer Software: Programming Data Processing 77Computer Software: Prepackaged Software 232Computer Manufacturing 10Biotechnology: Pharmaceutical Preparations 501Major Banks 245Industrial Machinery/Components 209Catalog/Specialty Distribution 30Business Services 93Commercial Banks 35Auto Manufacturing 29Integrated oil Companies 18Investment Bankers/Brokers/Service 68Real Estate Investment Trusts 179Department/Specialty Retail Stores 14Oil & Gas Production 116Telecommunications Equipment 82Beverages (Production/Distribution) 35Electronic Components 21Finance: Consumer Services 163Electric Utilities: Central 59Consumer Electronics/Appliances 23Natural Gas Distribution 29Medical Specialities 44All industries →
Figures come from SEC filings and daily market prices. Companies listed only outside the US are not covered — see methodology.