Aaron P. Knoll
Attorney
Overview
Aaron Knoll is a trial lawyer that businesses and governments turn to when the stakes are high.
Aaron represents companies of all sizes in complex commercial, product-liability, and class-action disputes. He advocates for developers in regulatory and litigation matters in the thriving clean-energy industry. He defends governments and political actors against challenges to the integrity of their decisions and elections. And he conducts internal and agency investigations concerning whistleblower allegations and sensitive risks.
Aaron has built a track record that speaks for itself, often finding early solutions that avoid costly litigation. He has a knack for distilling complicated issues into clear and compelling themes that persuade any audience. And when a case must be tried, he delivers. Aaron has successfully represented clients in multiple jury and bench trials in state and federal courts.
Above all, Aaron listens to what truly matters to his clients and then gives strategic, practical advice focused on achieving their goals. Clients particularly rely on Aaron when they need a competitive advantage using genuine emotional intelligence and powerful visual advocacy.
Beyond his litigation practice, Aaron has a passion for education and community service. He teaches legal writing at the University of St. Thomas School of Law, speaks to companies and conferences on emerging legal issues, and mentors law students and young lawyers as they embark on their future endeavors.
EDUCATION
- J.D., University of St. Thomas School of Law, summa cum laude; Articles Editor, St. Thomas Law Review
- B.A., University of Minnesota, History and Geography, with Distinction, magna cum laude
EXPERIENCE
- Faegre Baker Daniels LLP, Associate
- U.S. District Court for the District of Minnesota, Judge Paul A. Magnuson, Law Clerk
- Minnesota Supreme Court, Justice Christopher J. Dietzen, Law Clerk
ADMISSIONS
- State of Minnesota
- U.S. District Court for the District of Minnesota
- U.S. District Court for the Southern District of New York
- U.S. District Court for the Northern District of Illinois
- U.S. Court of Appeals for the Eighth Circuit
AFFILIATIONS
- Federal Bar Association, Civil Discovery Practice Group Co-Chair (2026-2027), Membership Committee Co-Chair (2025-2026), Diversity and Inclusion Committee Co-Chair (2023-2025), Membership Committee Co-Chair (2022-2023), Legal Education Committee Co-Chair (2020-2022), Golf Tournament Committee Chair (2018-2020)
- Minnesota State Bar Association
- American Bar Association
Aaron's Practice Areas
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Accountant Liability
Explore Practice AreaGreene Espel has extensive experience in a wide variety of disputes and problems confronting accounting firms, including the representation of Big Four, regional, and local accounting firms in audit, tax, and consulting negligence lawsuits, class action securities litigation, review board proceedings, and various federal and state regulatory and criminal matters.
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Appellate
Explore Practice Area“What’s next?” Greene Espel can guide you through the appellate process, providing an objective assessment of the pivotal issues, developing a strategy based on how appellate judges are likely to view a case in light of legal, institutional, and policy considerations, and advocating effectively.
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Class Actions
Explore Practice AreaClients regularly turn to Greene Espel when faced with high-stakes, class-action litigation. Greene Espel attorneys have defended dozens of putative class actions in federal and state courts all across the country.
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Commercial Litigation
Explore Practice AreaOur business litigation practice embraces the wide variety of commercial disputes facing private and public companies today. Areas of particular expertise include intellectual property, antitrust, securities, employment, professional liability, and construction disputes.
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Energy and Environmental
Explore Practice AreaHandling environmental and energy disputes is a fundamental part of our practice. We defend lawsuits, give compliance counseling, and offer guidance in the face of legal and regulatory quagmires.
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Products Liability
Explore Practice AreaDefending products liability claims has been a cornerstone of Greene Espel’s practice since our founding in 1993. Manufacturers and other businesses turn to us when they face product defect allegations brought by individuals, by large groups of plaintiffs, or as putative class actions.
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Securities Litigation
Explore Practice AreaInstitutional investors and public companies alike have turned to Greene Espel in high-stakes securities litigation: fraud cases, multi-million-dollar battles over the terms of securities, class actions, shareholder disputes, RMBS, and more.
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Internal Investigations
Explore Practice AreaWe leverage our experience to conduct sensitive and high-profile internal investigations for our clients. We also help clients navigate investigations to mitigate reputational, regulatory, and litigation risks.
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Constitutional Litigation
Explore Practice AreaConstitutional litigation is a cornerstone of Greene Espel’s practice. We represent individuals, private businesses, and government entities where their actions raise constitutional issues.
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Elections and Redistricting
Explore Practice AreaGreene Espel takes on attacks to voting rights and democratic institutions—and wins. We take on lawsuits to tackle voter suppression, election subversion, and districting issues.
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Anti-corruption and FCPA
Explore Practice AreaGreene Espel rivals big firms with its experienced group of corruption and FCPA investigators and counselors. We help companies efficiently and effectively investigate allegations of corruption, assess their compliance programs, and present their best possible case to prosecutors and regulators.
Cases & Wins
BUSINESS LITIGATION
Aaron has defended companies in complex and high-value commercial, products, and class-action litigation in federal and state courts:
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Co-lead counsel representing Olmsted County in successful two-week jury trial of allegations of age, race, and gender discrimination, and retaliation in which the plaintiff sought $8.2 million in damages. The jury found no liability, discrimination, or retaliation on the part of the County. Jacob v. Olmsted, Case No. 55-cv-22-2347 (Third Judicial District, MN 2024)
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Secured summary judgment for national accounting firm against alleged hundreds of millions of dollars in malpractice claims by state insurance regulator
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Obtained favorable resolution for Fortune 100 retailer in a putative consumer class action alleging fraudulent sale of gift cards
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Defending powersports manufacturer in multiple cases alleging a design defect in a product line of off-road vehicles
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Won jury verdict for wholesale distributor of hand sanitizer in breach-of-contract action in federal court
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Successfully resolved claims on behalf of a global grain exporter for damages caused by the effective closure of the Chinese market to U.S. corn exports following the commercialization of certain GMO corn
- Won dismissal of Section 20A claims against several defendants in a securities-fraud class action in the Southern District of New York
- Defeated claims of whistleblower retaliation, tortious interference, and assault and battery against a large composites company in arbitration
- Won dismissal of statutory and common law consumer-fraud claims against Fortune 500 company in putative nationwide class action involving dental products
- Won summary judgment for Fortune 500 company against claims of product defects in fall-protection equipment
- Successfully defended Fortune 500 company against allegations of breach of license agreement, fraud, and anti-competitive conduct
- Successfully defended national creditor against statutory-fraud and business-tort claims and guided the client through system-wide risk-mitigation improvements
- Compelled arbitration on behalf of major retail finance company after a bench trial
- Obtained favorable settlement for national tile retailer in securities class action
- Compelled arbitration in many putative consumer-protection class actions on behalf of financial institutions and retailers
- Defeated or resolved in amicable settlement several opt-out cases pursuing Telephone Consumer Protection Act claims
CLEAN ENERGY AND ENVIRONMENT
Aaron has represented energy developers in navigating regulatory issues, litigating commercial and environmental disputes, and fighting for project approvals on appeal:
- Successfully helped several developers of community solar gardens respond to and defeat co-location notices and other objections from Xcel Energy
- Secured siting and permitting decisions for developers of solar gardens from Minnesota cities and counties
- Successfully defended solar-garden developer in litigation over post-acquisition contract and fraud claims
- Counseled Fortune 500 company in adapting to changed circumstances impacting renewable energy purchase agreements
GOVERNMENT AND POLITICS
Aaron has helped local and state governments and political actors defeat obstructions to public actions and elections:
- Won summary judgment for regional utilities commission against claims by withdrawn member seeking the commission’s assets
- Defended cities against lawsuits seeking to overturn land-use and zoning decisions
INTERNAL INVESTIGATIONS
Aaron has handled anti-corruption and other investigations for businesses faced with whistleblower allegations, regulatory action, and auditor scrutiny:
- Represented filtration company to investigate allegations of accounting irregularities in Belgium
- Represented large industrial client to investigate allegations of FCPA violations in China
- Represented agricultural processor to investigate allegations of unsafe food handling practices
- Represented commercial dairy producer to investigate allegations of FCPA violations in Mexico
- Represented healthcare technology management organization to investigate allegations of FCPA violations in India
PRO BONO
Lastly, Aaron maintains an active pro bono practice:
- Defended a death-row inmate in Alabama state and federal post-conviction proceedings
- Argued a criminal appeal on Fourth Amendment grounds in Minnesota state court
- Sought expungements of criminal records for clients across Minnesota
- Representing a client from Honduras seeking asylum in the United States based on sexual orientation and gender identity
- Representing a client from Rwanda seeking asylum in the United States based on race, political opinion, and sexual orientation
Aaron's Recognition & Awards
- 2023 Attorney of the Year, Minnesota Lawyer
- 2022 Attorney of the Year, Minnesota Lawyer
- Listed in Best Lawyers: Ones to Watch (2021-2027)
- Up and Coming Attorney, Minnesota Lawyer (2020)
- Selected to Minnesota Rising Stars list, Minnesota Super Lawyers (2019-2026)
- Dean's Award for Outstanding Teaching, University of St. Thomas School of Law (2019)
- North Star Lawyer for pro bono service, Minnesota State Bar Association (2016-2017)
- Judge Earl R. Larson Law Student Award, Federal Bar Association (2012)
- Mission Award for Excellence in Professional Preparation, University of St. Thomas School of Law (2010)
Aaron's Community Involvement
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University of St. Thomas School of Law, Adjunct Faculty (2014-2026)
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University of St. Thomas School of Law Mentor Program, Mentor (2015-2026)
- American Bar Association National Appellate Advocacy Competition, Coach (2013-2015)