UNITED STATES COURT OF APPEALS FOR THE SIXTH CIRCUIT

┐ THOMAS BALTRUSAITIS; GUILLERMO ANTUNEZ; PATRICK │ BARTH; RICHARD BROECKER; RYAN BUDEK; TUYEN │ CHU; DARRYL CRAIG; SATISH DOSHI; JOHN FLETCHER; │ EMORY GASPERAK; JON HUTCHINSON; ALAN R. │ No. 22-1383 JARZEMBOWSKI; FRANK KOTSONIS; SANDRA D. LANGE; > ARTHUR LAURIN; KEVIN LUCZAK; TIM MAURO-VETTER; │ REGINALD MCINTYRE; CARL OBERNDORFER; JEROME │ PEACOCK; EJAZ RAHMAN; CHARLIE RICKMAN; MARK │ ROSINSKI; GREG RYNTZ; MICHAEL SAVOSKY; BRIAN │ SCHIFFMAN; FRED SCHNELL; GREGORY SKONIECZNY; │ LISA SOWINSKI; SURAJ TANDON; CHANCE TESS; JAMES │ VIRIGLIO; BRIAN WARDA; COREY WATKINS; DANNY │ WOODRUFF; HAROLD WRIGHT; JOHN ZELL; JAMES │ ZIEMIANSKI, │ Plaintiffs-Appellants, │ │ │ v. │ │ INTERNATIONAL UNION, UNITED AUTOMOBILE, │ AEROSPACE AND AGRICULTURAL IMPLEMENT WORKERS │ OF AMERICA; FCA US, LLC; ALPHONS IACOBELLI; │ JEROME DURDEN; MICHAEL BROWN; DENNIS WILLIAMS; │ GARY JONES; NORWOOD H. JEWELL; VIRDELL KING; │ KEITH MICKENS; JOHN DOES 1–10, │ Defendants-Appellees. │ ┘ Appeal from the United States District Court for the Eastern District of Michigan at Port Huron. No. 3:20-cv-12793—Robert H. Cleland, District Judge.

Argued: July 20, 2023

Decided and Filed: November 22, 2023

Before: GILMAN, LARSEN, and NALBANDIAN, Circuit Judges. No. 22-1383 Baltrusaitis, et al. v. UAW, et al. Page 2

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COUNSEL ARGUED: Kenneth D. Myers, Cleveland, Ohio, for Appellants. Elisabeth Oppenheimer, BREDHOFF & KAISER, PLLC, Washington, D.C., for Appellee UAW. Julia M. Jordan, SULLIVAN & CROMWELL, LLP, Washington, D.C., for Appellee FCA. ON BRIEF: Kenneth D. Myers, Cleveland, Ohio, for Appellants. Elisabeth Oppenheimer, Jacob Karabell, BREDHOFF & KAISER, PLLC, Washington, D.C., for Appellee UAW. Julia M. Jordan, SULLIVAN & CROMWELL, LLP, Washington, D.C., Steven L. Holley, Jacob E. Cohen, Justin M. Zaretzky, SULLIVAN & CROMWELL LLP, New York, New York, Brian M. Schwartz, MILLER, CANFIELD, PADDOCK & STONE, PLC, Troy, Michigan, for Appellee FCA. Michael A. Nedelman, NEDELMAN LEGAL GROUP, PLLC, Farmington Hills, Michigan, for Appellee Iacobelli. Judith S. Gracey, THE GRACEY LAW FIRM, PLLC, Keego Harbor, Michigan, for Appellee Durden. _________________

OPINION _________________

LARSEN, Circuit Judge. Plaintiffs are current and former engineers employed by automaker FCA US LLC (now Stellantis). In 2011, FCA transferred the work that plaintiffs had previously performed at FCA’s company headquarters to a new location. Plaintiffs were unhappy with the transfer, and in 2015 they filed a grievance with their