Marshall Dennehey
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.
- Company typePrivate
- Founded1962
- HeadquartersPhiladelphia, United States
- Headcount1,001–5,000
- GTM typeB2B
- OfferingServices
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.
Marshall Dennehey firmographics
Firmographics- 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
Marshall Dennehey industry classification
Industry- 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
Where Marshall Dennehey is headquartered
LocationHeadquarters
- HQ city
- Philadelphia
- HQ country
- United States
- HQ region
- North America
Offices19 records
Markets served
Marshall Dennehey business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- 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
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Enterprise Legal Defense Representation |
Go-to-market motion2 records
Distribution channels2 records
Marketing channels5 records
Marshall Dennehey product offering
Product offeringCore 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
Companies that use Marshall Dennehey
Customer profileNamed customers2 records
Segments4 records
Ideal customer profiles4 records
Marshall Dennehey technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature1 record
Marshall Dennehey partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- A.M. BestcoreMarshall 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
Marshall Dennehey competitors and assessment
Company assessmentDirect 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
Marshall Dennehey social profiles
Digital presenceMarshall Dennehey financial estimates
Financial estimateRevenue estimate
Valuation estimate
Marshall Dennehey leadership team
Management profileNumber of profiles
Profiles10 records
Marshall Dennehey funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Marshall Dennehey M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Marshall Dennehey
What does Marshall Dennehey do?
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.
Is Marshall Dennehey a public or private company?
Marshall Dennehey is a private company. It is classified as management employee owned and is currently operating.
When was Marshall Dennehey founded?
Marshall Dennehey was founded in 1962. It employs 1,001 to 5,000 people.
Where is Marshall Dennehey based?
Marshall Dennehey is headquartered in Philadelphia, United States, in the North America region.
How does Marshall Dennehey make money?
One revenue line is on record: legal Defense Services.
Who are Marshall Dennehey's main competitors?
Direct peers on record are Lewis Brisbois Bisgaard & Smith LLP, White and Williams LLP, Robinson+Cole LLP, Post & Schell, P.C., Traub Lieberman Strauss & Shrewsberry LLP, Wilson Elser Moskowitz Edelman & Dicker LLP, Rawle & Henderson LLP, Goldberg Segalla LLP and Rivkin Radler LLP. Anderson Kill P.C. is listed as an emerging player.
Does Marshall Dennehey have an API?
No public API is recorded for Marshall Dennehey.
What industry is Marshall Dennehey in?
Marshall Dennehey's product category is Defense Litigation Legal Services. Its primary akta.pro industry code is BPAHAAAM, Personal Injury & Insurance Defense. Its NAICS code is 541110 and its SIC code is 8111.