| AcrisureGrand Rapids broker and fintech group founded in 2005, with 2025 brokerage revenue of $3.75 billion, a $32 billion 2025 valuation and 2026 job cuts. | National brokers | Grand Rapids, Michigan | $3.75 billion brokerage revenue; $4.82 billion gross revenue (Business Insurance ranking, June 26, 2026) |
| Alliant Insurance ServicesIrvine, California specialty broker founded in 1925, ranked No. 6 worldwide with $5.72 billion of 2025 brokerage revenue and heavy private-equity backing. | National brokers | Irvine, California | $5.72 billion brokerage revenue, 2025 (Business Insurance ranking, June 26, 2026) |
| AmwinsCharlotte wholesale broker and underwriting manager placing over $45 billion of premium a year; employee and investor owned, reached through a retail agent. | Wholesale and specialty brokers | Charlotte, North Carolina | Not disclosed by the company; premium placements of more than $45 billion a year (Amwins release, Dec. 11, 2025) |
| AonDublin-domiciled global broker with 2025 revenue of $17.2 billion across commercial risk, reinsurance, health and retirement; owns the NFP benefits arm. | Global brokers | Dublin, Ireland | $17,181 million (2025 Form 10-K and Jan. 30, 2026 results release) |
| Arthur J. Gallagher & Co.Illinois-based global broker founded in 1927, with 2025 revenue of $13.8 billion and a bigger U.S. middle-market arm after buying AssuredPartners in 2025. | Global brokers | Rolling Meadows, Illinois | $13,778 million before reimbursements; $13,942 million total (Jan. 29, 2026 results release) |
| BroadStreet PartnersColumbus, Ohio partnership of independent agencies with 2025 U.S. brokerage revenue of $1.9 billion; an Ethos-led investor group joined its owners in 2025. | National brokers | Columbus, Ohio | $1.91 billion U.S. brokerage revenue (Business Insurance 2026 ranking of largest U.S. brokers, 11th) |
| Brown & BrownDaytona Beach broker with 2025 revenue of $5.9 billion, retail and specialty-distribution segments, and the 2025 Accession (Risk Strategies, One80) purchase. | National brokers | Daytona Beach, Florida | $5,902 million total revenues; $5,763 million commissions and fees (Jan. 2026 results release) |
| CRC GroupWholesale broker and underwriting platform formerly part of Truist; owned since May 2024 by Stone Point, CD&R and others, and reached through a retail agent. | Wholesale and specialty brokers | Charlotte, North Carolina | Not disclosed; the company or its owners cite $30 billion or more in annual premiums placed (July 2025 and Stone Point's page) |
| Heffernan Insurance BrokersWalnut Creek, California broker founded in 1988, employee-owned per the company, with a SkyKnight Capital minority investment and 20-plus acquisitions. | Regional and middle-market brokers | Walnut Creek, California | Estimated at over $500 million (Insurance Business, Aug. 27, 2026; an estimate, not a filed figure) |
| HigginbothamFort Worth broker founded in 1948, majority employee-owned with Stone Point Capital as a minority investor, ranked 16th by Business Insurance in 2026. | Regional and middle-market brokers | Fort Worth, Texas | $1.049 billion U.S. brokerage revenue (Business Insurance 2026 ranking of brokers, 16th) |
| HUB InternationalChicago-based private broker with 2025 brokerage revenue of $4.75 billion, backed by Hellman & Friedman and valued at $29 billion in a May 2025 investment. | National brokers | Chicago, Illinois | $4.75 billion brokerage revenue, 2025; $5.28 billion gross revenue (Business Insurance ranking, June 26, 2026) |
| IMA Financial GroupDenver-based, majority employee-owned broker with more than 3,000 associates, ranked 21st by Business Insurance in 2021 and 2024 and expanding by acquisition. | Regional and middle-market brokers | Denver, Colorado | Not reported; $301.6 million of 2020 brokerage revenue (Business Insurance, Oct. 2021) |
| Leavitt GroupCedar City, Utah network of 80+ partner agencies founded in 1952, privately held with local co-owners, reporting $607 million of consolidated revenue. | Regional and middle-market brokers | Cedar City, Utah | $607 million consolidated revenue and $4.64 billion placed premium (company website, stated for 2026 with no fiscal year given) |
| LocktonKansas City, Missouri broker, privately held and family-owned since 1966, ranked No. 8 worldwide by 2025 brokerage revenue of $4.37 billion. | Global brokers | Kansas City, Missouri | $4.37 billion brokerage revenue, 2025 (Business Insurance ranking, June 26, 2026); $4.0 billion global revenue for the fiscal year ended April 30, 2025 (Lockton release, June 16, 2025) |
| Marsh McLennanThe largest insurance broker by revenue, now branded Marsh, with Guy Carpenter, Mercer, Oliver Wyman and the U.S. middle-market arm Marsh McLennan Agency. | Global brokers | New York, New York | $26,981 million (2025 results release, Jan. 29, 2026) |
| NewfrontSan Francisco technology-led broker founded in 2017 and acquired by WTW for up to $1.3 billion, announced December 2025 and completed in January 2026. | Digital brokers | San Francisco, California | Not disclosed by the company or WTW in the sources we reviewed |
| NFPNew York middle-market broker and benefits consultant, owned by Aon since April 2024; revenue is reported inside Aon's, and its wealth units were sold in 2025. | National brokers | New York, New York | Not reported separately; included in Aon's 2025 revenue of $17,181 million (Aon results release, Jan. 30, 2026) |
| Patriot Growth Insurance ServicesFort Washington, Pennsylvania agency platform founded in 2019, backed by GI Partners and Summit Partners, with 2,200-plus employees in 29 states. | Regional and middle-market brokers | Fort Washington, Pennsylvania | Not disclosed; $124.4 million of 2020 U.S. brokerage revenue per Business Insurance (older ranking) |
| Risk StrategiesBoston-founded national broker, owned by Accession from 2023 and bought by Brown & Brown for $9.825 billion in August 2025. | National brokers | Boston, Massachusetts | Not reported separately; Accession had about $1.7 billion of 2024 pro forma adjusted revenue (Brown & Brown, June 2025) |
| Ryan SpecialtyChicago wholesale broker and underwriting manager founded in 2010, with 2025 revenue of $3.05 billion; business owners reach it through a retail agent. | Wholesale and specialty brokers | Chicago, Illinois | $3,051.1 million total revenue (Feb. 12, 2026 results release and 2025 Form 10-K) |
| The Baldwin GroupTampa distributor (Nasdaq: BWIN) with 2025 revenue of $1.5 billion, merged with CAC Group in January 2026 and agreed in September 2026 to go private. | National brokers | Tampa, Florida | $1,504.9 million total revenue, of which $1,493.7 million commissions and fees (Feb. 2026 results release) |
| The Hilb GroupRichmond-area, Virginia acquirer founded in 2009, majority-owned by Carlyle since 2019, with 200-plus acquisitions and 125-plus offices in 32 states. | Regional and middle-market brokers | Henrico County (Richmond area), Virginia | Approximately $650 million annual revenue as of late 2024, stated by the CEO (Insurance Business, Oct. 5, 2026); no 2025 figure found |
| USI Insurance ServicesValhalla, New York middle-market broker with about $3 billion of revenue, owned by KKR and agreed in August 2026 to be sold to Aon for $17 billion. | National brokers | Valhalla, New York | $2.89 billion U.S. brokerage revenue, 2025 (Business Insurance); about $3 billion annual revenue (Aon release, Aug. 31, 2026) |
| World Insurance AssociatesIselin, New Jersey broker founded in 2011, backed by Charlesbank and Goldman Sachs Asset Management, with over 230 offices and a new CEO in April 2026. | Regional and middle-market brokers | Iselin, New Jersey | More than $700 million (company release, April 21, 2026) |
| WTWLondon-based global broker and consultancy formed by the 2016 Willis-Towers Watson merger, with 2025 revenue of $9.7 billion and a 2026 U.S. push via Newfront. | Global brokers | London, England | $9,708 million (2025 Form 10-K and Feb. 2026 results release) |