About Us

Gary E. Mason


Gary Mason

Gary is a nationally recognized leader of the class action bar. Focusing on consumer class actions and mass torts, Gary has recovered more than $1.5 billion in the 30 years he has represented plaintiffs.

Gary is nationally known for representing consumers in class actions involving data breaches (U.S. Office of Professional Management; Tik Tok), environmental incidents (Exxon Valdez, BP Horizon), and a wide range of defective products, including Chinese drywall, fire retardant plywood, polybutylene pipe, high-temperature plastic venting, hardboard siding, pharmaceutical products, consumer electronics, and automobiles.

His notable cases include: Co-Lead Counsel in In re Hill’s Pet Nutrition, Inc., Dog Food Prods. Liab. Litig., MDL No. 2887 (D. Kan.) (order granting final approval of $12 million settlement entered July 30, 2021); court-appointed Co-Lead Counsel in In re Deva Concepts Prods., No. 1:20-cv-01234-GHW (S.D.N.Y.) (order granting preliminary approval of $5.2 million settlement entered July 30, 2021); Cox v. Shell Oil Co., No. 18844, 1995 WL 775363 (Tenn. Ch. Ct. July 31, 1995) (defective polybutylene pipe; $950 million settlement); Hobbie v. RCR Holdings, II, LLC, No. 10-113, MDL No. 2047 (E.D. La. filed Apr. 20, 2010) (354-unit condominium built with Chinese Drywall; settlement for complete remediation at cost of $300 million); Adams v. Fed. Materials, No. 5:05-CV-90-R, 2006 WL 3772065 (W.D. Ky. Dec. 19, 2006) (350 owners of commercial and residential property whose structures were built with defective concrete; $10.1 million settlement); In re MI Windows & Doors Inc. Prods. Liab. Litig., No. 2:12-MN-00001-DCN, MDL No. 2333, 2015 WL 4487734 (D.S.C. July 23, 2015) (defective windows; claims made settlement for over 1 million homes); In re Synthetic Stucco Litig., No. 5:96-CV-287-BR(2), 2004 WL 2881131 (E.D.N.C. May 11, 2004) (settlements with four EIFS Manufacturers for North Carolina homeowners valued at more than $50 million); Posey v. Dryvit Sys., Inc., No. 17,715-IV, 2002 WL 34249530 (Tenn. Cir. Ct. Oct. 1, 2002) (Co-Lead Counsel; national class action settlement provided cash and repairs to more than 7,000 claimants); Galanti v. Goodyear Tire & Rubber Co., No. 03CV00209, 2004 WL 6033527 (D.N.J. Nov. 17, 2004) (Class counsel; defective radiant heating systems; $330 million settlement); and In re Zurn Pex Plumbing Prods. Liab. Litig., No. 08-MDL-1958, 2013 WL 716088 (D. Minn. Feb. 27, 2013) (Plaintiffs’ Executive Committee; +$20 million claims-made settlement). 

Mr. Mason also has decades of experience litigating privacy cases.  He served as Co-Lead Counsel in In re Dep’t of Veterans Affs. (VA) Data Theft Litig., No. 1:06-MC-00506, 2007 WL 7621261 (D.D.C. Nov. 16, 2007) (unlawful disclosure of PPI of 28.5 million military veterans and active-duty personnel; $20 million settlement fund) and In re Google Buzz Priv. Litig., No. C 10-00672 JW, 2011 WL 7460099 (N.D. Cal. June 2, 2011) ($10 million settlement fund in a case arising for unauthorized disclosure or personal information).  He is currently a Court-appointed Liaison Counsel in In re U.S. Off. of Pers. Mgmt. Data Sec. Breach Litig., 266 F. Supp. 3d 1 (D.D.C. 2017).

Gary attended Brown University where he graduated Magna Cum Laude before attending law school at Duke University School of Law. During his studies in law school, Gary was the editor of the school’s law review, Law & Contemporary Problems. Gary also clerked for the Honorable Andrew J. Kleinfeld, U.S. District Court Judge, in Anchorage, Alaska.  

​After law school, Gary joined Skadden Arps, one of the leading law firms in the world. Gary then joined Cohen Milstein Sellers & Toll PLLC and became a Partner where he focused his practice on consumer class action litigation.