Aon vs Berkshire Hathaway Specialty Insurance: Professional Liability / E&O Insurance

Aon describes professional-liability structures tailored to professional firms. Berkshire Hathaway Specialty Insurance lists target buyer groups for Miscellaneous Professional Liability and Lawyers Professional Liability.

What Are the Key Differences Between Aon and Berkshire Hathaway Specialty Insurance Professional Liability (E&O) Insurance?

Form and Coverage Scope

Aon says it tailors professional-liability structures for professional-services firms, naming law, accounting and consulting practices as its audience. Berkshire Hathaway Specialty Insurance separates Lawyers Professional Liability from Miscellaneous Professional Liability and names staffing firms, management consultants, marketing firms and real-estate firms as targets for the latter. That product split can help a buyer identify which BHSI route to explore; ask Aon how its proposed form treats the same professional class. [1] [4]

Buyer Fit and Policy Terms

BHSI describes an in-house claims group experienced in complex, high-value claims and integrated with underwriting. Aon describes risk-management and human-capital advisory support, not a specific claims unit on its reviewed page. Neither summary states account limits or exclusions. If comparing claims support, ask both who handles a claim and how that team participates, then compare the actual insured-services definitions and policy terms. [1] [4]

What Should You Confirm in Aon and Berkshire Hathaway Specialty Insurance Professional Liability (E&O) Insurance Quotes?

Ask BHSI whether your firm fits Miscellaneous or Lawyers Professional Liability and request the applicable form. [1] [4]
Ask Aon to identify its claims contact, carrier, limit and insured professional services. [1] [4]

Areas of coverage

Aon

role: Aon presents Professional Liability / E&O as a line its Professional Services Practice helps arrange or advise on for professional-service firms. Aon is describing a global brokerage and advisory service, not issuing the underlying policy. The producing legal entity and carrier for any particular placement are not named on this page. Aon’s global professional-services practice page. This establishes a marketed brokerage/advisory offering, not policy issuance or account-specific placement.company-reportedSource ↗
eligibility: Aon identifies law, accounting and consulting firms as the audience for its global Professional Services Practice. That audience scope does not establish eligibility for every firm or other business. Audience described for Aon’s global professional-services practice. It does not establish U.S. state availability or underwriting eligibility for a placement.company-reportedSource ↗
coverage: Aon describes professional liability as addressing professional-services firms’ liability exposure and says it tailors coverage structures to a firm’s needs. It identifies E&O as a commonly used name for professional-liability insurance; actual policy terms are not stated. Aon’s marketing description of the brokerage/coverage area. The page is not the insurer’s policy form and does not establish an insured's entitlement to coverage.company-reportedSource ↗
services: Aon says its professional-services advisors use industry knowledge, insights, data and tools to support risk-management and human-capital decisions. This is a company-described advisory service, not a claim outcome or policy benefit. Company-reported advisory services on Aon’s global practice page; account-specific service scope is not stated.company-reportedSource ↗
insurer: The reviewed practice page does not name the insurer or producing legal entity for a specific placement. Ask for both on the quote and binder. Aon’s global practice page as reviewed 2026-09-30; no state-specific placement schedule or buyer quote was reviewed. This does not establish that Aon cannot arrange a placement.not-foundSource ↗
limits: The reviewed page does not state a buyer-specific limit, retention, deductible or other placement terms. Confirm these in the quote, bond or issued policy. Aon’s global practice page as reviewed 2026-09-30; no quote, bond form or issued policy was reviewed.not-disclosedSource ↗

Berkshire Hathaway Specialty Insurance

coverage: BHSI’s U.S. Professional First overview identifies Lawyers Professional Liability and Miscellaneous Professional Liability alongside Technology E&O and Media Liability. Portfolio catalogue statement; the specific legal/professional class and form must be selected rather than treating the offerings as one policy.company-reportedSource ↗Source ↗
eligibility: The overview names staffing firms, management consultants, marketing firms and real-estate firms as targeted customers for Miscellaneous Professional Liability; it separately lists law-firm size bands for Lawyers Professional Liability. U.S. Professional First target statements; class-specific eligibility only.company-reportedSource ↗
coverage: For architects, engineers and consultants, BHSI describes a professional-liability form that also addresses pollution, media, technology and cyber/network-security exposures. This is a specialized design-industry combined form, not generic E&O wording or proof that all risks receive each component.company-reportedSource ↗
services: The Professional First overview describes its in-house claims handling group as experienced in complex, high-value claims and integrated with underwriting. Company-reported portfolio-level claim-service description, not independently measured claims performance.company-reportedSource ↗

Sources reviewed

01
Professional Services Practice
Aon · Named professional-services audiences and global advisory role, lines 125–128; line offerings and explanations lines 131–190; contact link lines 120–122. Global practice page; no U.S. state or account-specific placement schedule. · accessed 2026-09-30
02
Professional First Architects, Engineers and Consultants Professional Liability
Berkshire Hathaway Specialty Insurance · Product Highlights: professional/pollution liability; media, technology and cyber/network security/privacy liability; direct breach/extortion expenses; risk services; primary/excess and project-specific product availability; target professions, lines 6–29. Its combined-form technology feature is not itself a standalone Tech E&O statement. · accessed 2026-09-28
03
Professional First Professional Liability
Berkshire Hathaway Specialty Insurance · U.S. Professional Liability landing page links Professional Liability / Network Security & Privacy, stand-alone Network Security & Privacy, and Architects, Engineers and Consultants PL, lines 6–15; footer copyright © 2026. · accessed 2026-09-28
04
Professional First Professional Liability Overview
Berkshire Hathaway Specialty Insurance · PDF pp.1–2: claims group and reporting; primary blended E&O/Cyber and stand-alone Cyber forms; line capacity statement; named Lawyers PL, Technology E&O, Miscellaneous PL, Media Liability, Network Security & Privacy; named technology-services target types and selection categories; dated 2026-06-03-A. Group capacity not a line policy limit. Source version: 2026-06-03-A. · accessed 2026-09-28
05
Professional Liability – US Direct Errors and Omissions Insurance
Hiscox Inc. specimen · About this Policy / Coverage for Claims Made Against You; I.A Insuring Agreement; I.B Defense; I.C Settlement; II.A Notice of Claims; II.C Optional Extended Reporting Period; III.A, III.K, III.M, III.R, III.S Exclusions; IV.A–B Limits and Deductible; VI.O Professional Services; VI.U Wrongful Act · accessed 2026-09-16
06
Professional liability insurance
Insurance Information Institute · Opening paragraphs (professional services/advice and E&O name); Claims not covered by general liability; What types of businesses need professional liability insurance?; What’s covered… and what’s not (claims-made versus occurrence, defense and judgments, non-financial/intentional limits, BOP/in-home exclusion) · accessed 2026-09-16
07
FAQ: Professional liability insurance
Texas Department of Insurance · What’s professional liability coverage?; What types of damages…; What’s general liability insurance?; Do I need professional liability… if I have general liability…?; Is professional liability insurance required?; Can a client require…?; What’s the difference between occurrence policies and claims-made policies · accessed 2026-09-16
08
Get business insurance
U.S. Small Business Administration · Six common types of business insurance table · accessed 2026-09-16