ORDER TO SHOW CAUSE

PHILIP A. BRIMMER, District Judge.

The Court takes up this matter sua sponte on the complaint [Docket No. 1]. Plaintiff states that this Court has jurisdiction pursuant to 28 U.S.C. § 1332. Docket No. 1 at 4, ¶ 3.

In every case and at every stage of the proceeding, a federal court must satisfy itself as to its own jurisdiction, even if doing so requires sua sponte action. See Citizens Concerned for Separation of Church & State v. City & County of Denver, 628 F.2d 1289, 1297 (10th Cir. 1980). Absent an assurance that jurisdiction ex ists, a court may not proceed in a case. See Cunningham v. BHP Petroleum Great Britain PLC, 427 F.3d 1238, 1245 (10th Cir. 2005). Courts are well-advised to raise the issue of jurisdiction on their own, regardless of parties' apparent acquiescence. First, it is the Court's duty to do so. Tuck v. United Servs. Auto. Ass'n, 859 F.2d 842, 844 (10th Cir. 1988). Second, regarding subject matter jurisdiction, "the consent of the parties is irrelevant, principles of estoppel do not apply, and a party does not waive the requirement by failing to challenge jurisdiction." Ins. Corp. of Ireland v. Compagnie des Bauxites de Guinee, 456 U.S. 694, 702 (1982) (internal citations omitted). Finally, delay in addressing the issue only compounds the problem if, despite much time and expense having been dedicated to the case, a lack of jurisdiction causes it to be dismissed. See U.S. Fire Ins. Co. v. Pinkard Constr. Co., No. 09-cv-00491-PAB-MJW, 2009 WL 2338116, at *3 (D. Colo. July 28, 2009).

"The party invoking federal jurisdiction bears the burden of establishing such jurisdiction as a threshold matter." Radil v. Sanborn W. Camps, Inc., 384 F.3d 1220, 1224 (10th Cir. 2004). Plaintiff asserts that this Court has diversity jurisdiction under 28 U.S.C. § 1332. Pursuant to that section, "district courts shall have original jurisdiction of all civil actions where the matter in controversy exceeds the sum or value of $75,000, exclusive of interest and costs, and is between . . . citizens of different States." 28 U.S.C. § 1332(a). The facts presently alleged are insufficient to establish plaintiff's citizenship.

The complaint alleges that plaintiff "is a Colorado limited liability company, with its principal place of business" in New York, New York. Docket No. 1 at 4, ¶ 1. To the extent this statement can be read as affirmatively pleading plaintiff's citizenship for purposes of diversity jurisdiction, it is deficient. The citizenship of a limited liability company is determined not by its state of organization or principal place of business, but by the citizenship of all of its members. See Siloam Springs Hotel, LLC v. Century Sur. Co., 781 F.3d 1233, 1237-38 (10th Cir. 2015) ("[I]n determining the citizenship of an unincorporated association for purposes of diversity, federal courts must include all the entities' members."). Because plaintiff has not identified each of its members or the citizenship of those members, the Court is presently unable to determine plaintiff's citizenship and whether the Court has subject matter jurisdiction. Wherefore, it is

ORDERED that, on or before 5:00 p.m. on March 1, 2019, plaintiff shall show cause why this case should not be dismissed due to the Court's lack of subject matter jurisdiction.