Daniel Tranen is the regional managing partner of Wilson Elser’s St. Louis, Missouri, and Kansas City, Kansas, offices. An accomplished litigator with more than 25 years of experience, he has handled matters and tried cases across the litigation spectrum throughout the United States. Daniel is licensed in state and federal courts in Missouri, Illinois, Georgia, and Massachusetts, and has lived and practiced in each of these jurisdictions. He currently serves as a co-chair of Wilson Elser’s national Life Sciences and Product Liability, Prevention & Government Compliance practices.

Daniel is a frequent speaker for the American Bar Association (ABA), DRI, Claims and Litigation Management (CLM) Alliance, and Chartered Property Casualty Underwriter (CPCU) Society, as well as for insurers and their policyholders. He writes and speaks on the defense of life sciences companies, insurance coverage disputes, attorney risk management, and other issues related to his practice. Daniel also advises life sciences companies and other employers, insurers, and professionals on risk management and employment practices. He is a co-editor of Wilson Elser’s coverage and professional liability newsletters, Coverage Matters and Professionally Speaking, and serves on the board of Spread Ari’s Light, a foundation that raises funds for services for children with pediatric cancer. 

Daniel serves as chair of the Claims Interest Group for the CPCU Society and as president of the Saint Louis Chapter of the CLM Alliance.

Areas of Focus

Life Sciences, Food & Product Mass Torts
As co-chair of Wilson Elser’s Life Sciences Practice, Daniel focuses on defending life sciences companies in individual product liability claims and mass tort litigation. For more than 15 years, he has served as national coordinating counsel handling product liability matters for a major international life sciences company and its affiliates. Daniel’s past and current work includes representing clients in mass torts involving the national pain pump litigation, the heparin contamination crisis, dozens of cases involving allegedly contaminated flush syringes, the defense (as local counsel) of the New England Compounding Center (NECC) in the national meningitis outbreak, and more recently, knee implants and cold therapy devices. He has previously defended life sciences companies in cases involving spinal implants, catheters, infusers, stents, inferior vena cava (IVC) filters, dental implants, orthopedic screws, and allegedly contaminated allografts. Daniel has twice been awarded trophies for outstanding advocacy by a major life sciences insurer at its annual panel counsel meeting. 

In addition, Daniel has supervised several food-related mass torts involving alleged contamination, design defects, and labeling claims in jurisdictions throughout the country. He currently oversees the defense of mass tort matters arising from multiple E. coli outbreaks involving different food products, lead contamination of applesauce pouches, and the recall of a product from a health food subscription service based on an alleged design defect.

Insurance Coverage
Daniel represents insurers in complex coverage disputes nationwide, with a particular focus on matters in Missouri and Illinois. His experience includes directors and officers (D&O), errors and omissions (E&O), commercial general liability, and other first- and third-party coverage litigation. He also advises insurers on potential coverage issues arising from the national opioid litigation and represents insurers in related coverage litigation. Daniel previously served as one of two subcommittee co-chairs for the ABA Litigation Section’s Insurance Coverage Litigation Committee in the areas of food, drugs, and products liability. His experience defending life sciences companies and litigating insurance coverage disputes provides complementary perspectives that inform both areas of his practice. 

Professional & Financial Institution Liability
Daniel has represented professionals in liability matters throughout his career, with a focus on defending lawyers, engineers and other design professionals, accountants, appraisers, mental health therapists, real estate brokers, and securities industry professionals, including in FINRA arbitrations. He also assists therapists and lawyers with licensing issues and has defended medical professionals, other health care providers, nursing homes, and long-term care facilities. Daniel represents banks and other financial institutions in commercial disputes and E&O claims.

Supervision of Downstate Illinois, Kansas, and Missouri Offices
As regional managing partner of Wilson Elser’s offices in St. Louis, Missouri, and Kansas City, Kansas, Daniel handles, tries, and supervises a wide range of litigation matters, including appellate practice, security, premises liability, product liability, transportation and trucking, general liability, maritime litigation, cannabis law, construction defect, sex abuse, employment, and environmental law disputes throughout Missouri and southern Illinois. Under Daniel’s supervision, the St. Louis office also handles the defense of Fair Debt Collection Practices Act and other statutory consumer defense claims, collection matters, and a variety of commercial litigation disputes. Daniel recently secured a defense verdict for the St. Louis Blues Hockey Club in a two-week negligence jury trial in St. Louis.

    Education

    • University of Illinois College of Law (J.D., cum laude, 1997)
      • Editor in Chief, Student Section of the Illinois Bar Journal
      • Dean’s List
      • Honors in Legal Research and Writing
    • University of Pennsylvania (B.A., 1992)
      • Executive Board, Penn Political Union

    Bar Admissions

    • Missouri
    • Illinois
    • Georgia
    • Massachusetts

    Court Admissions

    • U.S. Court of Appeals, First Circuit
    • U.S. Court of Appeals, Sixth Circuit
    • U.S. Court of Appeals, Seventh Circuit
    • U.S. Court of Appeals, Eighth Circuit
    • U.S. Court of Appeals, Eleventh Circuit
    • U.S. District Court, Northern District of Georgia
    • U.S. District Court, Middle District of Georgia
    • U.S. District Court, Northern District of Illinois
    • U.S. District Court, Central District of Illinois
    • U.S. District Court, Southern District of Illinois
    • U.S. District Court, Northern District of Indiana
    • U.S. District Court, Southern District of Indiana
    • U.S. District Court, District of Massachusetts
    • U.S. District Court, Eastern District of Michigan
    • U.S. District Court, Western District of Michigan
    • U.S. District Court, Eastern District of Missouri
    • U.S. District Court, Western District of Missouri
    • U.S. District Court, Eastern District of Wisconsin

    Professional Affiliations

    • Claims and Litigation Management Alliance
    • American Bar Association
    • ACA International

    Awards & Honors

    • Missouri Lawyers Media: Illinois Legal Leaders, 2026
    • Selected for inclusion in The Best Lawyers in America®, 2026-2027
    • Award for Outstanding Advocacy, Medmarc Insurance Company, 2014, 2016
    • Selected for Rising Stars / Class Actions and Mass Torts by New England Super Lawyers, 2010
    • Outstanding Defense Verdict in an Attorney Malpractice Case, Jury Verdict Reporter, 2010
    • Selected for Rising Stars / Insurance Coverage by Illinois Super Lawyers, 2009

Daniel E. Tranen

Events

Daniel Tranen is the regional managing partner of Wilson Elser’s St. Louis, Missouri, and Kansas City, Kansas, offices. An accomplished litigator with more than 25 years of experience, he has handled matters and tried cases across the litigation spectrum throughout the United States. Daniel is licensed in state and federal courts in Missouri, Illinois, Georgia, and Massachusetts, and has lived and practiced in each of these jurisdictions. He currently serves as a co-chair of Wilson Elser’s national Life Sciences and Product Liability, Prevention & Government Compliance practices.

Daniel is a frequent speaker for the American Bar Association (ABA), DRI, Claims and Litigation Management (CLM) Alliance, and Chartered Property Casualty Underwriter (CPCU) Society, as well as for insurers and their policyholders. He writes and speaks on the defense of life sciences companies, insurance coverage disputes, attorney risk management, and other issues related to his practice. Daniel also advises life sciences companies and other employers, insurers, and professionals on risk management and employment practices. He is a co-editor of Wilson Elser’s coverage and professional liability newsletters, Coverage Matters and Professionally Speaking, and serves on the board of Spread Ari’s Light, a foundation that raises funds for services for children with pediatric cancer. 

Daniel serves as chair of the Claims Interest Group for the CPCU Society and as president of the Saint Louis Chapter of the CLM Alliance.

Daniel E. Tranen

Tranen and Martinez Tristani Obtain Dismissal of Product Liability Suit in Puerto Rico

Daniel E. Tranen (Partner-St. Louis, Mo) and Gustavo A. Martinez Tristani (Partner-Miami) obtained dismissal for a large warehouse club client in a product liability lawsuit brought in the U.S. District Court for the District of Puerto Rico. The plaintiffs, a husband and wife, claimed the husband contracted E. coli after eating carrots purchased at the client’s store in Bayamón, Puerto Rico, resulting in personal injuries and loss of consortium. The plaintiffs alleged that the carrots constituted a defective product under Puerto Rico law and sued under theories of negligence, breach of warranty, and strict liability. Daniel and Gustavo filed a motion to dismiss, arguing the complaint failed to state a cause of action under any of the asserted theories because it failed to adequately allege a breach of duty and because the carrots were not a defective product as a matter of law.  The plaintiffs countered that our client was liable for breaching an implied warranty that products sold for human consumption are fit for human consumption and free of defects. In a nine-page opinion, the trial court dismissed the action with prejudice, holding that the complaint failed to state a cause of action because it failed to allege that the carrots became contaminated with E. coli through a manufacturing process and because they were not a defective product as a matter of law.    

Daniel E. Tranen and Gustavo A. Martinez Tristani

Product Liability

Thurston, Tranen, and Curtis Secure Declaratory Judgment Relief for Insurance Company Client

James Thurston (Partner-Chicago), Daniel Tranen (Partner-St. Louis, MO), and Robert Curtis (Associate-St. Louis, MO) secured a declaratory judgment dismissal on motion on the pleadings for an insurance company client in U.S. District Court for the Western District of Missouri. The plaintiffs in this matter, executives at a company insured by our client, sought coverage for a lawsuit and a demand letter arising out of their provision of personal guarantees to the company for more than $14 million in debt to a lender and a supplier. The client had denied coverage because these personal guarantees were not made in the executives' capacity as officers of the company. The executives argued that they would not have made the personal guarantees but for the fact that they were officers of the company. However, the court agreed with the insurance company client that personal guarantees are personal obligations, and therefore, cannot be made by the executives in their "capacity" as officers of the company, particularly since if they had done so, then it would have been the company guaranteeing its own debt.

James K. Thurston, Daniel E. Tranen and Robert Curtis

Tranen, Wilke and Boston Obtain Unanimous Defense Verdict for Security Company

The St. Louis, Missouri, team of Daniel Tranen (Partner), Julia Wilke (Of Counsel) and Jennifer Boston (Associate) represented a security company client accused to failing to search a psych patient who brought a gun into the hospital emergency department and pointed it at two nurses while they tried to get him to change into hospital scrubs. The nurse plaintiffs argued that the mere fact that he had the gun demonstrated a lapse in security's need to control weapons coming into the emergency department. We convinced the jury that for patients in the treatment area of the emergency department – based on internal hospital policies and the post orders for our client – all searches had to be initiated by hospital staff, and there was no evidence that hospital staff initiated a search. Moreover, the procedures for searches had the search take place after the patient was in hospital scrubs and therefore this particular patient was not yet supposed to be searched under this key policy. Meanwhile, neither nurse plaintiff had requested a search before the gun was discovered, therefore, it was not our client’s fault that the patient had not yet been searched when he revealed the gun to the plaintiff nurses. The plaintiffs requested a verdict of $1 million with both nurses claiming significant PTSD symptoms and damages as a result of the incident. The jury returned a unanimous defense verdict after about an hour (you only need 9 of 12 jurors to reach a verdict in Missouri).

Daniel E. Tranen and Jennifer Boston

Murphy-Petros, Thurston, Tranen and Butterfield Score Team Victory before the U.S. Court of Appeals for the Ninth Circuit

Melissa Murphy-Petros (Of Counsel-Chicago, IL) Jim Thurston (Partner-Chicago, IL), Daniel Tranen (Partner-St. Louis, MO), and Chad Butterfield (Partner-Las Vegas, NV) convinced the Nevada District Court that coverage was not available under a $5 million D&O policy for the putative claims by a bankruptcy litigation trustee against a former officer (Kay). Kay allegedly breached his fiduciary duties to an insured entity when he failed to uncover the criminal fraud of its former CEO (Rogas). The Court followed Wilson Elser’s arguments that Kay’s breaches were “arising from” Rogas’s prior fraud and, therefore, fell within the purview of the exclusionary language of a warranty letter executed by Rogas, wherein he represented that “no insured” (including Rogas) had knowledge or information of any act or error that might give rise to a claim. Following briefing and oral argument by Melissa, the U.S. Court of Appeals for the Ninth Circuit affirmed, holding that despite two non-imputation clauses in the policy and allegations of wrongdoing by Rogas after the warranty letter, “the broad language excluding any claim ‘arising from’ pre-execution knowledge” was sufficient to bar any coverage to Kay under the policy. This three-office victory evidences the successful collaboration between Wilson Elser’s coverage, litigation and appellate attorneys on an economical basis without having to use additional local counsel.

Melissa A. Murphy-Petros, James K. Thurston and Daniel E. Tranen

Events

Daniel Tranen is the regional managing partner of Wilson Elser’s St. Louis, Missouri, and Kansas City, Kansas, offices. An accomplished litigator with more than 25 years of experience, he has handled matters and tried cases across the litigation spectrum throughout the United States. Daniel is licensed in state and federal courts in Missouri, Illinois, Georgia, and Massachusetts, and has lived and practiced in each of these jurisdictions. He currently serves as a co-chair of Wilson Elser’s national Life Sciences and Product Liability, Prevention & Government Compliance practices.

Daniel is a frequent speaker for the American Bar Association (ABA), DRI, Claims and Litigation Management (CLM) Alliance, and Chartered Property Casualty Underwriter (CPCU) Society, as well as for insurers and their policyholders. He writes and speaks on the defense of life sciences companies, insurance coverage disputes, attorney risk management, and other issues related to his practice. Daniel also advises life sciences companies and other employers, insurers, and professionals on risk management and employment practices. He is a co-editor of Wilson Elser’s coverage and professional liability newsletters, Coverage Matters and Professionally Speaking, and serves on the board of Spread Ari’s Light, a foundation that raises funds for services for children with pediatric cancer. 

Daniel serves as chair of the Claims Interest Group for the CPCU Society and as president of the Saint Louis Chapter of the CLM Alliance.

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