Sandra Arguello, et al. v. Costco Wholesale Corporation, et al.

I. BACKGROUND

On July 10, 2025, Plaintiffs Sandra Arguello and Louis Arguello filed a complaint in the Superior Court of California for the County of Riverside against Defendants Costco Wholesale Corporation (“Costco”), Kahresa Jeff, Jane Doe 1, and Does 2-50. (“Complaint,” Dkt. No. 1, Ex. A.) Defendant Costco removed the case on September 17, 2025. (Dkt. No. 1.) The Complaint alleges four causes of action: (1) negligence; (2) negligent hiring, supervision, and/or retention; (3) premises liability; and (4) loss of consortium. (See Complaint.) On October 7, 2025, Plaintiffs filed this Motion. (See Motion.) Defendant Costco filed its Opposition on October 20, 2025. (“Opposition,” Dkt. No. 9.) Plaintiffs replied on October 27, 2025. (“Reply,” Dkt. No. 10.)

II. FACTUAL ALLEGATONS

Plaintiffs allege the following facts, which are assumed to be true for the purposes of this motion. See Am. Fam. Ass’n, Inc. v. City & Cnty. of San Francisco, 277 F.3d 1114, 1120 (9th Cir. 2002). Plaintiff Sandra Arguello (“Sandra”) and Plaintiff Louis Arguello (“Louis”) are California residents. (Compl. ¶¶ 2-3.) Defendant Costco is a Washington resident. (Id. ¶ 4.) Defendant Kahresa Jeff…