Marsh vs WTW: How Do They Compare for Professional Liability (E&O) Insurance?

Marsh's financial and professional liability practice places professional liability (errors and omissions) insurance; MMA also places E&O coverage within its executive and professional liability practice for middle-market clients. ^5,6Company-reported. Marsh professional liability page and MMA executive and professional liability page.

Under WTW's North American Corporate Risk & Broking terms, WTW normally acts as the client's insurance intermediary for engagements governed by those terms. ¹²Company-reported. Terms for applicable North American Corporate Risk & Broking engagements. WTW also discloses separate insurer-side services in some arrangements; this does not determine the role in a specific engagement.

The reviewed pages do not name a specific professional liability insurer. ^5,6Not publicly disclosed. Marsh professional liability page and MMA executive and professional liability page as read on 2026-09-23.

The reviewed WTW sources do not identify an issuing insurer for a specific professional errors omissions placement. ^12,11,10Not publicly disclosed. This is a gap in the cited marketing, annual-report, and brokerage materials; it does not mean WTW lacks insurer markets. Confirm the carrier on the quote and issued policy.

Marsh names specialized industries its professional liability experts serve, including banking and broker/dealers, insurance companies and asset managers, merchant banking and venture capital, accountants, attorneys, architects and engineers, media and entertainment, technology, and healthcare and biotechnology. ⁵Company-reported. Marsh professional liability page, What We Offer section.

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Marsh says professional liability coverage can protect a company against liability and defense costs from a claim alleging an error, omission or negligence in performing professional services, and that many policies also cover privacy violations and computer security breaches. ⁵Company-reported. Marsh professional liability page opening description; illustrative policy description, not a specific policy form.

WTW's FY2024 annual report describes professional-liability solutions within FINEX; its residential practice lists errors-and-omissions among financial lines for residential real-estate stakeholders. ^11,10Company-reported. The report is historical and group-level; the residential E&O reference is segment-specific and based on retained official indexed text. Neither establishes current terms or eligibility outside that segment.

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The reviewed sources do not state a buyer-specific professional errors omissions limit, retention, or deductible. ^12,11,10Not publicly disclosed. No limit or deductible is inferred from general marketing or WTW's brokerage role; the insurer's quote and issued forms control.

Marsh says it employs attorneys, economists and actuaries alongside coverage specialists to assess a client's professional liability exposure from multiple angles, given the complexity of these risks. ⁵Company-reported. Marsh professional liability page.

WTW's North American terms describe reviewing binders, policies, and endorsements against the terms negotiated with the insurer. ¹²Company-reported. Broker document-review process under the cited terms, when WTW handles this line's placement. It does not certify that a policy covers a claim or replace the issued wording.

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WTW's North American terms say an insurer quote is not confirmation of coverage; if the client orders binding, WTW seeks a formal insurer commitment, typically a binder. ¹²Company-reported. Applies to placements governed by the cited North American Corporate Risk & Broking terms. It does not establish a self-service quote route or promise coverage availability for this line.