Aon vs 
Berkshire Hathaway Specialty Insurance: How Do They Compare for Umbrella and Excess Liability Insurance?
Aon: umbrella and Excess Liability as separate coverage areas within construction liability. The page does not specify an attachment point, underlying policy, limits or terms for a particular placement. Berkshire Hathaway Specialty Insurance: bHSI markets lead umbrella and excess casualty as an explicit product line and lists pollution/contractor-form features. 3,9
What Is Aon?
Aon’s U.S. Commercial Risk terms describe brokerage for certain insurance programs, while its Middle Market page describes a dedicated practice for mid-sized organizations across North America. The public materials reviewed do not identify the licensed producer or insurer for a particular placement. Ask which entity will produce each line and which insurer will issue the policy; request jurisdiction details for the proposed placement and ask how compensation and claim notice work for your account. 1,2
What Is Berkshire Hathaway Specialty Insurance?
BHSI provides commercial and specialty insurance in the U.S., with product-specific industry lists that include healthcare, energy and technology. Online quote and application submissions are nonbinding. 4,5,6,7
Read the Berkshire Hathaway Specialty Insurance profile
Read the Berkshire Hathaway Specialty Insurance Umbrella and Excess Liability Insurance page
What Is Umbrella and Excess Liability Insurance?
Umbrella or excess insurance adds liability limits above the policies named in the quote after a covered claim exhausts their limits. It may fit if a contract sets higher limits; check which primary policies are listed and any gaps between them. 10,11,12,13,14
What Are the Key Differences Between Aon and Berkshire Hathaway Specialty Insurance Umbrella and Excess Liability Insurance?
How the excess layer follows underlying coverage
Aon describes its global construction practice designs and places risk solutions and uses broking experience and a global network across construction insurance lines. For umbrella and excess liability, this is evidence of Aon’s brokered market offering; the page does not identify the insurer for a buyer’s placement. Berkshire Hathaway Specialty Insurance describes bHSI markets lead umbrella and excess casualty as an explicit product line and lists pollution/contractor-form features. Ask whether the proposed form follows the underlying wording or adds a stated feature, and identify the policies and exhaustion points it requires. 3 9
Capacity and buyer segment
Aon describes its global construction practice designs and places risk solutions and uses broking experience and a global network across construction insurance lines. For umbrella and excess liability, this is evidence of Aon’s brokered market offering; the page does not identify the insurer for a buyer’s placement. Berkshire Hathaway Specialty Insurance describes bHSI markets lead umbrella and excess casualty as an explicit product line and lists pollution/contractor-form features. Compare the stated industry appetite and available capacity with your operations, then request the actual limit and attachment point for your account. 3 9
Broker or insurer service route
Aon describes its global construction practice designs and places risk solutions and uses broking experience and a global network across construction insurance lines. For umbrella and excess liability, this is evidence of Aon’s brokered market offering; the page does not identify the insurer for a buyer’s placement. Berkshire Hathaway Specialty Insurance describes bHSI markets lead umbrella and excess casualty as an explicit product line and lists pollution/contractor-form features. Ask who handles underwriting questions, renewal changes and claims advocacy for the layer. 3 9
What Should You Confirm in Aon and Berkshire Hathaway Specialty Insurance Umbrella and Excess Liability Insurance Quotes?
- Ask Aon to confirm the quoted coverage trigger, underlying policies and exclusions; its offering says umbrella and Excess Liability as separate coverage areas within construction liability. The page does not specify an attachment point, underlying policy, limits or terms for a particular placement. 3
- Ask Berkshire Hathaway Specialty Insurance to confirm the quoted coverage trigger, underlying policies and exclusions; its offering says bHSI markets lead umbrella and excess casualty as an explicit product line and lists pollution/contractor-form features. 9
Aon and Berkshire Hathaway Specialty Insurance Review Scores for 2026
These averages can combine ratings for different products, locations, and customer groups, including approximate BBB grade conversions. Read each review for the sources, scope, and calculation.
Aon Review Score
Review Score
3 rated sources
Public ratings for Aon are low: Trustpilot shows 1.2 out of 5 from 782 reviews, and BBB shows 1.6 from five. Aon is a global firm, so those pages mostly reflect other parts of the business, not large U.S. commercial accounts.[4][6][7]
Read Aon reviewsBerkshire Hathaway Specialty Insurance Review Score
Review Score
No reviews found
The public ratings for Berkshire Hathaway Specialty Insurance are low but thin: Trustpilot shows 2.1 out of 5 from 9 reviews and BBB shows 1 out of 5 from 6. Both mix travel and commercial customers, so we don't count them in a score.[5][7]
Read Berkshire Hathaway Specialty Insurance reviewsAon vs Berkshire Hathaway Specialty Insurance Umbrella and Excess Liability Compared
Aon vs Berkshire Hathaway Specialty Insurance: Umbrella and Excess Liability Insurance: documented features by provider
| Criteria | Aon Umbrella and Excess Liability brokerage and risk-advisory offering | Lead umbrella and excess casualty |
|---|---|---|
| Role in This Line | Aon says its global construction practice designs and places risk solutions and uses broking experience and a global network across construction insurance lines. For umbrella and excess liability, this is evidence of Aon’s brokered market offering; the page does not identify the insurer for a buyer’s placement. 3Company-reported. Aon’s global construction and infrastructure practice page. This establishes a marketed brokerage/advisory offering, not policy issuance or account-specific placement. | Confirm in your quote. |
| Issuing 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. 3Not found in reviewed sources. 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. | Confirm in your quote. |
| Who It’s For | Aon describes its global construction and infrastructure practice as serving contractors, owners, developers, engineers, architects, designers, financiers and investors, and says it works with organizations of varied sizes and complexity. 3Company-reported. Audience described for Aon’s global construction and infrastructure practice. It does not establish U.S. state availability or underwriting eligibility for a placement. | BHSI lists manufacturers/distributors, real estate, grocery, financial institutions, construction, energy and trucking as umbrella/excess targets. 9Company-reported. BHSI US lead umbrella/excess casualty targets. Material limitation: Targets remain subject to restrictions and underwriting appetite. |
| Coverage Features | Aon lists Umbrella and Excess Liability as separate coverage areas within construction liability. The page does not specify an attachment point, underlying policy, limits or terms for a particular placement. 3Company-reported. 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. | BHSI markets lead umbrella and excess casualty as an explicit product line and lists pollution/contractor-form features. 9Company-reported. US commercial casualty placements. Material limitation: Marketing overview; the manuscript and broker-specific forms require underwriting. |
| Limits and Retentions | 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. 3Not publicly disclosed. Aon’s global practice page as reviewed 2026-09-30; no quote, bond form or issued policy was reviewed. | The appetite guide lists lead umbrella, follow-form excess and retained-limit forms, with $10 million excess capacity and more for selected risks. 8Company-reported. Select risks in the guide’s US casualty appetite. Material limitation: Capacity is not a quote or universally available layer; “more” is risk-selective. |
| Risk Services | Aon describes project risk-advisory services to understand project-specific risks and develop risk-transfer, management or mitigation strategies. It also describes a global construction team and market access. These are company-reported brokerage and advisory services, not coverage benefits. 3Company-reported. Company-reported advisory services on Aon’s global practice page; account-specific service scope is not stated. | Confirm in your quote. |
Related Pages for Aon vs Berkshire Hathaway Specialty Insurance
Umbrella and Excess Liability Pages for Aon and Berkshire Hathaway Specialty Insurance
Other Coverage Lines Compared for Aon vs Berkshire Hathaway Specialty Insurance
Other Umbrella and Excess Liability Insurance Provider Comparisons
Sources for Aon vs Berkshire Hathaway Specialty Insurance
Sources About Aon
- Commercial Risk Solutions U.S. Brokerage Terms of Service. Aon; Lines 120–127: certain-program broker-of-record scope, consultation, application assistance, client signature and bind instruction, and account administration; lines 140–147: variable and contingent compensation, potential placement incentive, and client request route; lines 206–213: no price guarantee and surplus-lines limitations; lines 229–231: client insurer-notice duty unless separately agreed. Accessed 2026-09-29.
- Middle Market Clients. Aon; Lines 125–132: mid-sized organizations and middle-market framing; lines 165–173: dedicated practice and North America statement; lines 188–224: Commercial Risk capabilities. No numeric company-size cutoff or U.S.-only eligibility rule is stated on the reviewed page. Accessed 2026-09-29.
- Construction and Infrastructure Insurance and Risk Management. Aon; Construction client audience and global placement role, lines 123–126; offering descriptions lines 135–156; coverage-area taxonomy lines 167–195; contact link lines 120–122. Global practice page; no U.S. state or account-specific placement schedule. Accessed 2026-09-30.
Sources About Berkshire Hathaway Specialty Insurance
- At A Glance. Berkshire Hathaway Specialty Insurance; United States section, zero-based PDF pages 49–53 (viewer pages 50–54): product/industry lists on pages 49–50; U.S. disclosure/version footer on page 53 is 2026-8-03 A. The 2026-09-14 A footer is on preceding European page 48, not the U.S. section. Accessed 2026-09-29.
- About Us. Berkshire Hathaway Specialty Insurance; About BHSI; company profile page re-opened through official site on 2026-09-28; company says it is part of National Indemnity group. Accessed 2026-09-28.
- Terms of Service. Berkshire Hathaway Specialty Insurance; Important Information Concerning Use of this Web Site, paragraphs 2–4; nonbinding submissions, contracted-agent authority, state variation, product availability and policy-specific terms. Accessed 2026-09-28.
- Public Disclosure — Berkshire Hathaway Specialty Insurance Singapore Branch. Berkshire Hathaway Specialty Insurance; Singapore branch public disclosure, Company Profile ¶¶ 1–2; direct page opened 2026-09-28. ¶ 1 identifies BHSIC as a Nebraska-domiciled direct P&C insurer; ¶ 2 states BHSIC is wholly owned by National Indemnity Company, itself wholly owned by Berkshire Hathaway Incorporated. Accessed 2026-09-28.
- Casualty Appetite Guide - U.S. Berkshire Hathaway Specialty Insurance; Casualty appetite PDF page 1: $50K minimum premium, GL/products/lead umbrella/excess lines, selected $10M excess capacity, placement forms and target/avoided classes; guide dated 2026-07-15. Accessed 2026-09-28.
- Casualty. Berkshire Hathaway Specialty Insurance; US casualty product lines and features: Primary General Liability lines 10-34; Primary Products/Completed Operations Liability 35-44; Lead Umbrella and Excess Casualty 46-63. Accessed 2026-09-28.
Sources for the Umbrella and Excess Liability Insurance Guide
- Liability Insurance. Insurance Information Institute; Heading Umbrella Liability Insurance; sentence Umbrella Liability—also known as Excess Liability Insurance; underlying policies listed with limits; typically GL, auto and employers’ liability; starts when a covered loss exhausts the primary per occurrence limit; Most umbrella policies exclude EPL, professional liability, product recall, workers compensation, asbestos, pollution, war and terrorism. Accessed 2026-09-16.
- Commercial Insurance Guide. California Department of Insurance; Commercial Umbrella; excess over a basic liability policy; auto/CGL/WC or any liability policy can be covered; may respond if basic policy not in force or for gaps; SIR when no underlying. Accessed 2026-09-16.
- Lines of Insurance. California Department of Insurance; Umbrella or Excess Liability Policy: excess limits over existing liability; may provide additional coverages not provided by underlying policies. Accessed 2026-09-16.
- Coverage Hub. Coverdash; Excess & Specialty: Umbrella; Excess Liability. Accessed 2026-09-16.
- Products. Kinro; 09 Umbrella/Excess: additional limits above scheduled underlying policies; when to review; reviewed with. Accessed 2026-09-16.
