Quick note: HGV is the UK term for heavy goods vehicles (lorries/trucks). Below I list top brokers used by HGV/haulage fleet operators (UK first, then major US equivalents) and a one-line reason why each is commonly recommended.

Top brokers for HGV / haulage fleets (UK-focused)

• Howden — large specialist transport & haulage practice; strong relationships with specialist haulage insurers and experience with big fleets and CMR/RHA requirements. (howdengroup.com, howdeninsurance.co.uk)
• Gallagher (Arthur J. Gallagher) — global broker with a dedicated haulage & logistics practice and fleet risk-management services. (ajg.com)
• Marsh (Marsh Commercial) — market leader for large UK fleets and bespoke fleet/haulage programmes. (marshcommercial.co.uk)
• Aon — national hauliers/fleet team, telematics/fleet‑risk capability and 24/7 claims support for operators. (aondigital.com)
• Willis Towers Watson (WTW) — global broker offering large-program capability and specialist risk consulting for transport customers. (en.wikipedia.org)

Top specialist / mid‑market HGV & haulage brokers (UK)

• Towergate — large independent broker known for truck/haulage cover and specialist schemes. (towergateinsurance.co.uk)
• ISIS Insurance — specialist HGV/truck broker serving owner‑drivers through fleets. (isisinsurance.co.uk)
• Anthony Jones, QMT, WRS, Finch, Fleet Compare and other independent specialists — well‑regarded for SME and regional fleets where sector knowledge and personal service matter. (anthonyjones.com, qmtcommercial.co.uk, wrsinsurance.co.uk)
• RHA Insurance Services — Road Haulage Association’s specialist insurance arm (useful for operators wanting haulage‑specific cover and RHA‑style contract familiarity). (haulageexchange.co.uk)

Major brokers / equivalents for US commercial truck fleets

• Reliance Partners — transport‑specialist broker focused on trucking/fleet programmes and custom rating/captive solutions. (reliancepartners.com)
• HUB International — large US broker with dedicated commercial truck & fleet practice and cross‑border support. (hubinternational.com)
• Lockton, Arthur J. Gallagher (US), Marsh and WTW — major global brokers that handle large US fleets and complex programmes. (en.wikipedia.org, marshcommercial.co.uk)

How to pick the right broker (quick checklist)

• Fleet size & complexity: global brokers for multinational/very large fleets; specialist independents for UK regional and SME fleets. (marshcommercial.co.uk, isisinsurance.co.uk)
• Claims & downtime handling: prioritise brokers with in‑house claims teams and fast recovery services.
• Telematics / risk‑management: look for brokers that integrate telematics and proactive loss-control programs. (aondigital.com)
• Cross‑border exposure (UK↔Europe / US↔Canada/Mexico): choose brokers with cross‑border programs and CMR/NAFTA experience. (howdengroup.com, reliancepartners.com)
• Appetite for captives / large‑retention programmes: if you need a captive or alternative-risk solution, use a broker experienced in that area (common among the large global brokers and some US specialists). (reliancepartners.com, marshcommercial.co.uk)

If you tell me where you operate (UK, US or other), your fleet size and whether you need cross‑border cover or specialist cargo/hazard cover, I can narrow this to 3‑4 brokers that best match your needs and give direct contact pages or next steps.