Patrick Lannen is a Founding Partner of Stinar Lannen and is a commercial trial lawyer. He has been fortunate and enjoys a perfect 12-0 record in trials.

In January 2025, he obtained a $37.2 million jury verdict against the world’s largest cannabis company after a two-week trial arising from the sale of 50,000 pounds of product. Hello Farms Licensing MI, LLC v. GR Vending MI, LLC, No. 21-CV-10499 (E.D. Mich. Jan. 29, 2025).

Prior to co-founding Stinar Lannen, Patrick spent nearly two decades at a large, well-established defense firm where he served as a group leader and on the board of directors, and completed more than 250 cases to verdict in various federal courts around the country, building up a series of “no causes” and summary judgment dismissals in multiple sectors, predominantly shareholder rights, finance, technology, UCC Article 2, and class actions.

Patrick was lead Class Counsel in an 8,242-member class action against Henry Ford Hospital Corporation for claims of data conversion and invasion of privacy. Patrick concluded final approval of the matter with a $141 million settlement, with no objections.

In June 2025, Judge Mark Goldsmith appointed Patrick to lead the Executive Committee in an ongoing data privacy class action that in August 2025 the Judicial Panel on Multi-District Litigation convened into an MDL and assigned to Judge Goldsmith. In re Keffer Dev. Servs., LLC, Data Sec. Breach Litig., No. MDL 3159, 2025 WL 2327173 (U.S. Jud. Pan. Mult. Lit. Aug. 8, 2025). Patrick argued at the JPML hearing and has continued his lead class role.

Patrick currently represents more than 4,000 California abuse survivors in consolidated proceedings arising from systemic abuse and neglect at California Women’s Detention Centers and California Juvenile Detention Centers. His leadership in these matters reflects a deep commitment to securing accountability and justice for vulnerable individuals held in state custody who have suffered at the hands of institutions entrusted with their care. These consolidated matters represent one of the most expansive institutional abuse dockets in the state.

Notable Case Results:

  • Mike Spot LLC v. GPM Empire, LLC, No. 23-CV-11603, 2025 WL 841610 (E.D. Mich. Mar. 18, 2025) — Summary judgment for Marathon Oil against Sherman Act vertical price-fixing claims.
  • Mitchell, Lewis & Staver, Co. v. Valley Farms Supply, LLC, No. 1:21-CV-555, 2025 WL 703778 (W.D. Mich. Mar. 5, 2025) — Prevailed on summary judgment as plaintiff on claim under the Stored Communications Act, including based on Defendants’ invocation against self-incrimination under the Fifth Amendment.
  • Parker v. Battle Creek Pizza, Inc., 95 F.4th 1009 (6th Cir. 2024) — Reversed summary judgment on interlocutory appeal in national issue of first impression regarding reimbursement rate of use of vehicles by employees.
  • Hogan v. Wayne Cnty., No. 362259, 2024 WL 2790297 (Mich. Ct. App. May 30, 2024) — Defeated class certification of 15,000-member putative class case based on constitutional torts claims and over $200 million in exposure.
  • Presidio, Inc. v. People Driven Tech., Inc., 686 F. Supp. 3d 652 (S.D. Ohio 2023) — Prevailed on summary judgment for 14 employees against a $100 million contract and trade secret claim arising out of a $250 million acquisition.
  • Dicastal N. Am., Inc. v. Markowitz Metals Grp., LLC, 633 F. Supp. 3d 999 (W.D. Mich. Sept. 30, 2022) — Prevailed on summary judgment for major aluminum trader against world’s largest wheel maker, obtaining dismissal of $5 million contract claims and favorable judgment on counterclaim.
  • Taieb v. Pharmaco, Inc. (Oakland County, Michigan) — First-chaired a seven-day jury trial to a no cause of action for a publicly traded Canadian company against claims of breach of contract, economic duress, and promissory estoppel.
  • Smith Living Tr. v. Erickson Ret. Communities, 326 Mich. App. 366 (2018) — Prevailed on summary judgment and affirmed on appeal in putative class action involving thousands of alleged fraudulent real estate transactions with more than $150 million in exposure.
  • Melton et al. v. Belle Tire Distributors, Inc. — Lead counsel in $135 million bet-the-company putative class action for alleged fraudulent sales of over 300,000 tires, obtaining denial of certification.

Today, Patrick leads the Firm’s office in Birmingham, Michigan, and specializes in mass and class actions and high-stakes commercial litigation matters.