Bar and Court Admissions
Marissa Ronk represents sophisticated clients in complex commercial litigation and class and mass actions. She is a strategic leader, setting the direction and development of major cases to establish priorities, challenge and frustrate opponents, and create opportunities. Colorado Super Lawyers lists Marissa for Business Litigation, and Benchmark Litigation has named her to its 40 & Under Hot List.
A resourceful, proactive, and savvy leader, Marissa builds case strategies that align with clients’ business goals and values. Rather than react to opponents’ moves, she designs litigation plans that exploit pain points and increase leverage for her clients, whether as a plaintiff or defendant. For example, Marissa often develops counterclaims and pursues aggressive discovery to take an upper hand.
In addition to her practice, Marissa serves as a mentor in the Leadership Council on Legal Diversity and a co-chair of WTO’s associate review committee. Prior to joining WTO in 2015, she worked in the litigation department of Winston & Strawn in Chicago.
- Serving as national counsel for a major international company in commercial litigation involving over 180 cases of alleged PCB exposure.
- Achieved an exceptional outcome for a green energy manufacturer in a supplier dispute. Despite a product recall arising mid-litigation, WTO obtained indemnification and no future liability as part of resolving both the original claim and the recall-related issues.
- Achieved favorable resolution of a multibillion-dollar commercial dispute for an oil and gas company in an asset purchase dispute.
- Represented a client in a business ownership dispute resulting in WTO's client winning total control of the company without litigation.
- Favorably resolved multimillion-dollar commercial litigation involving breach of contract issues for a CBD manufacturer.
- Served as co-counsel to an oil and gas company in an $80 million dispute. During mediation, WTO helped effect a buyout solution resulting in valuable land rights and resolving the lawsuit for a small fraction of what it would have cost to settle.
- Won a $1.25 billion exit fee dispute for an electric distributor against its generation and transmission provider.
- Obtained financial and other relief for a manufacturer in business and trade secrets matters.
- Won an "extraordinary remedy" from the Colorado Supreme Court reversing a trial-court order implying a waiver of the attorney-client privilege. The unanimous opinion establishes that the mere "fact that privileged information might become relevant in a given lawsuit could not alone be enough to establish an implied waiver."
- Recovered all funds claimed in a breach of contract dispute between two Fortune 20 companies.
- Represented a Fortune 20 company in an international arbitration hearing that resulted in a settlement, after the hearing concluded, for more than 90% of our client's claim.
- Won a Rule 21 petition (an "extraordinary remedy") for Ford to the Colorado Supreme Court in a case involving general jurisdiction and venue claims. The opinion makes it harder for companies with no connection to Colorado to be sued in the state.
Class & Mass Actions
- After prevailing on a motion to dismiss all of plaintiffs' nationwide class claims, settled all claims individually for a major appliance manufacturer in a class action involving the doors in all of its microwave ovens.
- Served as co-counsel in an oil and gas putative class action alleging violation of royalty rights. An early and aggressive discovery strategy persuaded the plaintiff to walk away from the matter.
- Serving as lead national trial counsel to a major U.S. distributor of vaping products in federal multidistrict litigation in California. WTO is liaison counsel to all of the distributor defendants in the litigation.
- Won a motion to dismiss with prejudice a putative class action in federal court in California. The plaintiff alleged violations of the Federal Fair Debt Collection Practices Act (FDCPA) and California's Rosenthal Fair Debt Collections Practices Act.
- Represented a major Colorado manufacturer in its winning motion to dismiss class action litigation alleging illegal pesticide use.
- Defended several manufacturers of high fructose corn syrup in a multimillion dollar dispute in which plaintiff alleged her consumption of the product caused her diabetes. The Western District of New York dismissed the complaint with prejudice and that dismissal was upheld by the Second Circuit.
- Represented multiple corporations in various class action matters alleging recording of calls in violation of the California Invasion of Privacy Act. Negotiated dismissal of them all for a nuisance fee.
- Defended a national automobile manufacturer in a putative class action alleging economic damage resulting from repairs to the driver's seat. Plaintiffs voluntarily dismissed their case without payment.
Publications & Speaking Engagements
Presenter, "Practical Considerations to the Reasonable Alternative Design Test," In-house counsel, (July 26, 2023).
- Co-Author, "Trial by Webcam: Tips From a Firsthand Experience," Law360, (May 28, 2020).
- Co-Author, "The Affordable Care Act and Colorado's Collateral Source Rule," Denver Law Journal, (June 21, 2016).
- Benchmark Litigation Names Marissa Ronk to Annual 40 & Under List
- Benchmark Litigation 2021 Includes 23 WTO Lawyers
- Lessons Learned From One of Nation's First Virtual Trials
- Wheeler Trigg O'Donnell Elects Six New Partners
- WTO Leads Top 100 in Colorado Super Lawyers
- Wheeler Trigg O'Donnell Welcomes Three Associates
- Law Week Colorado, "WTO Brings on Three Associates," June 24, 2015.
Winston & Strawn LLP
Legal Memberships, Activities, and Honors
Colorado Super Lawyers
Super Lawyers, Business Litigation, 2023
Rising Stars, Business Litigation - 2021
Rising Stars, Personal Injury - Products Defense, 2018-2020
The Best Lawyers in America
Ones to Watch - Commercial Litigation, 2021, 2022, 2024
Ones to Watch - Mass Tort Litigation / Class Actions - Defendants, 2021-2023
Ones to Watch - Product Liability Litigation - Defendants, 2021, 2022, 2024
Ones to Watch - Litigation - Labor and Employment, 2024
Future Star, 2021-2023
40 & Under Hot List, 2023-2024
Leadership Council on Legal Diversity
Mentor, 2022 - present
Colorado General Counsel Mentoring Program, 2018-2020
Cooking, biking, and Scrabble