Expertise: Insurance & Claims

Two Gnarus Principals Recognized as Lexology Index Thought Leaders (Insurance 2026)

May 8, 2026 — Gnarus Advisors LLC announced that two of its Principals, Jessica B. Horewitz and Stephen E. Sellick, have been named Thought Leaders in the newly released Lexology Index: Insurance 2026. Thought Leader recognition is reserved for individuals who distinguish themselves through Lexology’s independent research process (approximately the top 25–30% of all ranked practitioners worldwide). Gnarus is also among a limited number of firms with multiple Thought Leaders recognized in this edition.

“It is a privilege to be recognized alongside Stephen Sellick, whose leadership has been instrumental in shaping the firm’s commitment to rigorous, client-focused analysis. We are grateful to our clients and peers for their continued trust.” — Jessica B. Horewitz, President

About the Lexology Index
The Lexology Index (formerly Who’s Who Legal) is a peer- and client-researched guide published by Law Business Research. Rankings are based on feedback from corporate counsel and clients, nominations from respected practitioners, and independent analysis by Lexology researchers. The Insurance 2026 edition highlights leading lawyers and consulting experts worldwide across insurance litigation, coverage disputes, regulatory matters, and expert witness engagements.

About Jessica B. Horewitz
Jessica B. Horewitz, Ph.D. is President of Gnarus Advisors LLC. She provides quantitative analysis and expert witness services in dispute settings, including product liability matters, corporate restructurings, and financial reporting. Her work spans deterministic and probabilistic liability forecasting and insurance coverage analysis, and she has contributed to more than two dozen corporate transactions across industrial, medical/pharmaceutical, and cosmetic products.

About Stephen E. Sellick
Stephen E. Sellick is the Founder and Board Chair of Gnarus Advisors LLC. For more than three decades, he has supported high-stakes insurance and reinsurance matters, focusing on the quantitative dimensions of complex coverage and claims disputes, risk management, and corporate governance. He holds an M.A. from the University of Chicago Harris School of Public Policy and a B.S. from the Wharton School of the University of Pennsylvania.

About Gnarus Advisors LLC
Gnarus Advisors LLC is a quantitative analysis and advisory firm specializing in corporate litigation support, public policy, and risk management. We advise law firms, corporations, and public entities on matters requiring rigorous analytical expertise at the intersection of data, finance, governance, and law. Gnarus has been recognized by Consulting magazine as one of its “Seven Small Jewels” and by Inc. magazine as one of the fastest-growing firms in its sector.

Contact
Annie Dizon, adizon@gnarusllc.com
gnarusadvisors.com

Gnarus Experts Horewitz and Sellick Recognized by Who’s Who Legal

Gnarus Advisors is pleased to announce that two of its Principals – President Dr. Jessica Horewitz and Chairman Stephen Sellick – have again been recognized by Who’s Who Legal: Insurance & Reinsurance – Expert Witnesses 2022 as recommended experts.

Both Horewitz and Sellick have been included in this selective listing of attorneys and consultants for multiple consecutive years. This distinguished honor relies upon recommendations and feedback from eminent private practitioners in the sector or industry in question as well as from corporate counsel or other clients who have worked closely with the nominee; inclusion is unsolicited and cannot be purchased.

“Gnarus experts strive to serve our clients with the highest quality analysis and we are delighted to be consistently recognized as industry leaders” noted Dr. Horewitz.

Dr. Horewitz brings over 20 years of experience in managing large volumes of data and conceptualizing analyses to best use the data for clients’ analytical needs. She performs liability estimation, claims analysis, claim projections, and cash flow analysis in asbestos and other mass tort matters. She is also experienced in statistical analysis, economic damages analysis, sports economics, and insurance coverage. Dr. Horewitz has conducted analyses in a diverse array of industries.

Mr. Sellick said, “I’m gratified to again be recognized by Who’s Who Legal as a recommended expert in insurance & reinsurance. It’s a real honor to be included.”

With over 25 years of experience in environmental and mass tort insurance claims, Mr. Sellick provides counsel and expert testimony to clients in various industries, including aerospace, agricultural products, consumer manufacturing, electronics, electric utilities, insurance, natural gas, and pharmaceuticals. Mr. Sellick’s expertise includes insurance allocation modeling, complex quantitative analysis, litigation risk analysis, and cost, policy, and regulatory analysis.

About Gnarus Advisors

Gnarus Advisors LLC provides analytic and expert services to clients facing complex challenges arising from uncertainty, potential litigation, or disputes. By leveraging its advanced quantitative and scientific skills, Gnarus provides its clients with keen insight into strategy, litigation, and regulatory matters and provide clear explanations of economic, financial, regulatory, and technical problems to judges, juries, regulators, management and other interested parties. The company’s areas of expertise include economic analysis, environmental litigation & disputes, environmental advisory, environmental science & engineering, insurance coverage & claims analysis, and product liability & mass torts. www.gnarusllc.com

 

Gnarus Assists SPX Technologies in Legacy Asbestos Liability Divestiture Transaction

Dr. Jessica Horewitz of Gnarus Advisors LLC recently performed liability estimation services in support of SPX Technologies, Inc.’s successful divestiture of three wholly-owned subsidiaries, in which their legacy asbestos liabilities resided, to Canvas Holdco LLC. Dr. Horewitz and her Gnarus team were asked to perform a comprehensive analysis of the SPX liabilities and a review of the associated insurance portfolio that formed the basis of the strategic business transaction.  SPX has noted that, as a result of the transaction, “all asbestos liabilities and related insurance assets will not be included in SPX’s consolidated year-end 2022 balance sheet.”  SPX further noted that it “anticipates that the divestiture will result in an annual benefit to its Adjusted Earnings Per Share of $0.08 to $0.10 beginning in 2023.”  Additional details may be found in the joint press release here.

Gnarus Advisors and its recognized experts have extensive experience performing liability estimation services for the purposes of financial reporting, insurance allocation and commutation, corporate restructuring, and transactions including bankruptcy, potential tort settlements, and the value of future unasserted claims.  For more information, please visit www.gnarusllc.com.

 

Shore, Patricia

Ms. Shore is experienced in providing claim quantification and allocation services to corporate policyholders involved in liability, property, cyber events, and other insurance disputes, claims, and litigation.  She has led and managed consulting and expert witness engagements on behalf of Fortune 500 clients in the utility, railroad, chemical and petrochemical, manufacturing, mining, and other industries. Her work includes significant long-tail and claims-made third-party liability insurance claims stemming from environmental releases, explosions, fires, catastrophic weather events, and other causes. Ms. Shore also consults on first-property property damage, extra expense, business interruption, and cyber claims. Ms. Shore earned a Bachelor of Science in Industrial Engineering from Oregon State University and has completed further coursework in accounting at Golden Gate University.

Annis Susan

Susan Annis has extensive experience in the economic consulting industry serving both government and private sectors. She has strong analytical and quantitative skills with experience in economic analysis, financial modeling, econometric and statistical modeling, policy analysis, and corporate financial assessment. Ms. Annis’s most recent analytical and modeling work has been in the litigation support arena. She is an experienced project and team leader in a management consulting environment.  Ms. Annis earned a Master of Arts in Economics from University of Virginia and a Bachelor of Science in Electrical Engineering from Bucknell University.

Henthorn, Brian

Brian Henthorn specializes in the estimation of environmental liabilities, the evaluation of cost recovery issues under the National Contingency Plan and state equivalents, the allocation of costs at hazardous waste sites, and related issues faced by parties at Superfund sites.

Mr. Henthorn has more than a 15 years of experience consulting with clients in a wide variety of contexts, including cost recovery litigation, bankruptcy, insurance recovery, and financial reporting. His experience includes working on two of the largest environmental litigation matters in U.S. history, and his clients span a wide range of industries including petrochemical, mining, energy, and manufacturing.

Mr. Henthorn earned a Master of Engineering Management, a Bachelor of Engineering in Environmental Engineering and a Bachelor of Arts in Engineering Sciences and Economics from Dartmouth College.

Kubota, Jason

Jason Kubota has over two decades of experience advising clients and providing expert testimony support in a variety of matters in the Environment and Natural Resources, Intellectual Property, and Product Liability sectors. His work has included damages analysis for government and private-party cost recovery and contribution actions, future liability estimation, financial modeling/forecasting, regulatory compliance evaluation, and settlement negotiation strategy.

 Mr. Kubota’s practice is focused on the evaluation of Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA or Superfund) remediation costs and consistency of cleanup actions with the National Contingency Plan (NCP) and/or applicable state regulations. His clients have included national and multinational corporations in the manufacturing, telecommunications, mining, and waste management industries, joint defense groups at multi-defendant sites, insurance companies, electricity providers and water agencies, and individual and commercial property owners.

 Mr. Kubota earned a Bachelor of Science in Engineering with Concentrations in Economics and Psychology from Harvey Mudd College and holds an Engineer-In-Training Certificate in the State of California.

Williams, Marcia

Marcia Williams is an expert on solid and hazardous waste. Ms. Williams’s practice focuses on regulatory expert and litigation support, environmental performance assessment and improvement, strategic environmental counseling and policy support and environmental business risk/opportunity evaluation and mitigation. She brings a wealth of government and corporate experience to Gnarus. Ms. Williams held senior management positions in multiple offices of the Environmental Protection Agency during her 18 years with the agency. Her work in the private sector has included top-level positions at several distinguished firms.

Ms. Williams played a significant role in the development, implementation and enforcement of federal and state regulatory programs. She also provided expert testimony in a wide range of litigation matters, including insurance coverage cases, contract disputes, CERCLA cost recovery actions, toxic tort cases, federal and state civil and criminal enforcement matters and NAFTA cases.

She holds a Bachelor of Science in Math and Physics from Dickinson College and studied math and physics at the graduate level at the University of Maryland.

Maloney, Dan

Dan Maloney has more than 15 years of experience in economic and financial modeling, data analytics, damages calculations and financial analysis.

He supports clients and their legal counsel on dozens of high profile, complex cases requiring close collaboration, creative problem solving, technical skill and subject matter expertise. He has worked on a wide variety of dispute resolution and litigation matters, including those involving asbestos, automotive, coal workers pneumoconiosis, environmental, lead paint, pharmaceutical and silica liabilities, product recalls, bad faith claims and other corporate matters.

Mr. Maloney has specific expertise in supporting insurance valuation and recovery efforts in the context of settlement, arbitration, and litigation. Mr. Maloney’s clients have ranged in size from Fortune 10 companies to mid-sized firms, covering industries from aerospace to waste management.

He earned a Master of Business Administration from The Johns Hopkins University, and graduated from The College of William & Mary with a Bachelors of Business Administration.

Kivler, Brandon

Brandon Kivler supports Gnarus clients on a variety of insurance coverage matters related to product and environmental liabilities. He focuses on creating financial models to allocate past and future costs to insurance policies. He also helps clients manage large volumes of data using relational databases to assist in decision making.

Mr. Kivler also has supported clients with first party claim recovery efforts for property damage and business interruption losses, as well as calculated economic damages. He led client engagements on environmental site cost allocations, underlying claims management, insurer billing and notice and London Market Schemes of Arrangement.

Mr. Kivler earned a Master of Business Administration from The Johns Hopkins University’s Carey Business School. Previously he earned a Bachelor of Science in Business Administration with concentrations in finance and international business from the University of Richmond where he graduated Summa Cum Laude.