Marshall Dennehey

What Marshall Dennehey does

Marshall Dennehey is a defense litigation law firm founded in 1962 and headquartered in Philadelphia, Pennsylvania. Operating as a professional corporation under Pennsylvania law, the firm employs more than 500 attorneys across 19 offices in seven states (Connecticut, Delaware, Florida, New Jersey, New York, Ohio, and Pennsylvania), with total headcount in the 1,001-5,000 range. The firm is organized around four core service departments: Casualty (20 sub-practice areas including automobile, product liability, premises, trucking, and asbestos), Professional Liability (20+ sub-practice areas covering non-medical professionals, public entities, and insurance coverage), Health Care (medical malpractice, licensing, and regulatory defense), and Workers' Compensation (employer/carrier defense and Medicare compliance).

Revenue is generated through professional services fees, with standard hourly billing across practice areas and value-based or alternative fee arrangements available for larger clients under multi-year contracts. Distribution is primarily through insurance carrier panel counsel relationships and direct outreach to self-insured businesses, public entities, and licensed professionals. The firm operates a proprietary Analytics & Outcomes platform that tracks case closure rates, median legal fees, cycle time, budget accuracy, and dispositions against client-aligned metrics, supporting pricing predictability and quality control across offices.

The firm differentiates itself through a non-origination compensation structure, in place since its founding, which fosters attorney collaboration over competition and supports optimal attorney-to-matter assignment. It has been named a Philadelphia Business Journal Best Places to Work for 13 consecutive years, has received consecutive Pennsylvania Legal Awards for Litigation Department of the Year in Appellate and Professional Liability, and earned Chambers USA recognition. Revenue is not publicly disclosed.

Name

Marshall Dennehey

Legal name

Marshall Dennehey, P.C.

Website

https://marshalldennehey.com

Company type

Private

Founded year

1962

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

Marshall Dennehey is a Philadelphia-based defense litigation law firm founded in 1962, with 500+ attorneys across 19 offices in seven states, serving insurance carriers, self-insureds, public entities, and licensed professionals through four core departments.

Ownership category

akta.pro rank

Product category

Defense Litigation Legal Services

NAICS

Offices of Lawyers (541110)

SIC

Services-Legal Services (8111)

akta.pro primary industry

Personal Injury & Insurance Defense (BPAHAAAM)

Keywords

• Civil defense litigation
• Insurance defense law
• Professional liability defense
• Workers compensation defense
• Casualty liability defense

Headquarters

HQ city

Philadelphia

HQ country

United States

HQ region

North America

Offices19 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Legal Defense Services: Marshall Dennehey generates revenue through legal defense representation fees, with commonality in pricing across many practice areas and alternative fee arrangements for larger clients. The firm offers value-based billing and AFAs for major clients.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels5 records

Core offering

Marshall Dennehey is a defense litigation law firm exclusively representing insurance companies, their insureds, self-insured businesses, public entities, and licensed professionals in civil litigation matters. The firm delivers legal defense representation across four core departments—Casualty (20 practice areas including automobile, product, premises, trucking, and asbestos liability), Professional Liability (errors and omissions, employment, public entity, cyber, and appellate), Health Care (medical malpractice and licensing defense), and Workers' Compensation (employer and carrier defense with Medicare compliance)—supported by an Analytics & Outcomes performance measurement platform.

Product overview

Marshall Dennehey operates as a unified defense litigation platform offering four core legal service departments: Casualty Department (encompassing 20 distinct practice areas including automobile, product liability, trucking, asbestos, and premises liability), Professional Liability Department (covering 20+ practice areas for non-medical professionals including lawyers, accountants, architects, and engineers), Health Care Department (medical malpractice, licensing, and regulatory defense), and Workers' Compensation Department (employer/carrier defense and Medicare compliance). The firm's proprietary Analytics & Outcomes platform differentiates its offering by tracking performance metrics aligned with client benchmarks across all 19 offices in seven states. The firm emphasizes its non-origination compensation structure which fosters collaboration over competition, and its over-six-decade legacy since founding in 1962.

Differentiator

Problem solved

Functional benefit

Products and services

• Casualty Department

Quantifiable outcome

• Consistent defense verdicts and favorable outcomes across jurisdictions
• +1 more outcomes

Named customers2 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

One partnership is on record.

• A.M. BestcoreStrategic or Co-development PartnerMarshall Dennehey attorneys regularly participate in A.M. Best webinars and podcasts as expert panelists discussing insurance law topics including nuclear verdicts, product liability misuse defense, and other emerging issues affecting the insurance industry.

Scale indicators4 records

Recent moves3 records

Expansion highlights6 records

Direct peers

• Lewis Brisbois Bisgaard & Smith LLP: Large national defense firm with broad geographic coverage and a casualty/general liability practice that competes with Marshall Dennehey for carrier panel allocations across multiple jurisdictions.
• White and Williams LLP: Philadelphia-based insurance defense and commercial litigation firm with comparable regional footprint across the Northeast and similar insurance carrier panel focus. Closest geographic and practice-area comparable to Marshall Dennehey.
• Robinson+Cole LLP: Hartford-based firm with a nationally recognized insurance and reinsurance practice, including coverage litigation and defense work. Comparable to Marshall Dennehey's Professional Liability and insurance coverage capabilities.
• Post & Schell, P.C. Philadelphia-based defense firm with deep insurance defense, professional liability, and healthcare practice overlap. Competes for similar carrier panel work in Pennsylvania and adjacent jurisdictions.
• Traub Lieberman Strauss & Shrewsberry LLP: Insurance defense and coverage boutique with New York/New Jersey presence and a focus on casualty, professional liability, and insurance coverage matters. Comparable mid-sized defense competitor.
• Wilson Elser Moskowitz Edelman & Dicker LLP: Among the largest U.S. insurance defense firms with national coverage, deep casualty and professional liability practices, and an extensive carrier client base. A scaled national comparable to Marshall Dennehey's regional platform.
• Rawle & Henderson LLP: One of the oldest continuously operating U.S. law firms, headquartered in Philadelphia with a longstanding insurance defense and casualty practice. Direct competitor for insurance carrier panel relationships in the Mid-Atlantic.
• Goldberg Segalla LLP: National insurance defense firm with offices across more than a dozen states, competing for the same carrier panel work in casualty, professional liability, and healthcare. Broader geographic reach than Marshall Dennehey.
• Rivkin Radler LLP: Northeast insurance defense firm with significant casualty, professional liability, and healthcare litigation practices. Direct competitor in NY/NJ/CT insurance defense markets.

Emerging players

• Anderson Kill P.C. Nationally recognized insurance coverage and recovery boutique with related defense capabilities. Overlaps with Marshall Dennehey's Professional Liability insurance coverage litigation practice rather than core casualty.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/MarshallDennehey
• Instagraminstagram.com/marshalldennehey
• LinkedInlinkedin.com/company/marshall-dennehey
• Xx.com/marshalldennlaw
• YouTubeyoutube.com/channel/UCQ4J1_8K2sY1vZ1J5x5rA

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Marshall Dennehey