ORDER TO SHOW CAUSE

PHILIP A. BRIMMER, District Judge.

This matter is before the Court on the Response to Order to Show Cause [Docket No. 37] filed by plaintiff David H. Hanson. Plaintiff states that the Court has subject matter jurisdiction over this lawsuit pursuant to 28 U.S.C. § 1332(a). Docket No. 37-1 at 1-2, ¶ 1.1

Plaintiff attaches a draft second amended complaint to his response. Docket No. 37-1. Plaintiff has made no motion to amend his complaint and, regardless, plaintiff's jurisdictional allegations remain defective. First, neither the draft complaint nor plaintiff's response contains jurisdictional allegations regarding defendant Bosley and Bratch, Inc. See Docket Nos. 37, 37-1.

Second, plaintiff does not identify the state of incorporation of defendant Bosley and Bratch, P.C. and, therefore, the Court cannot determine the corporation's citizenship. Docket No. 37-1 at 2, ¶ 4; 28 U.S.C. § 1332(c)(1) ("a corporation shall be deemed to be a citizen of every State and foreign state by which it has been incorporated and of the State or foreign state where it has its principal place of business").

Third, plaintiff states his allegations regarding the citizenship of the individual defendants "upon information and belief." Docket No. 37-1 at 2 ¶¶ 5-7. The Court reads plaintiff's averments of the citizenship of the individual defendants to mean that plaintiff does not have affirmative knowledge of the individual defendants' citizenship. Such unsupported allegations do not confer subject matter jurisdiction over this case. See Yates v. Portofino Real Estate Props. Co., LLC, No. 08-cv-00324-PAB-MJW, 2009 WL 2588833, at *3 (D. Colo. Aug. 17, 2009) (requiring plaintiff to "address the citizenship of each of [defendant's] members without resorting merely to their `information and belief' as to the same"); 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) (allegations made on information and belief "mean that plaintiffs have no affirmative knowledge of a lack of diversity").

Fourth, plaintiff's response "asserts that he is a citizen of the State of Colorado," Docket No. 37 at 1, ¶ 2, but the draft complaint alleges that plaintiff is a "resident in the state of Colorado." Docket No. 37-1 at 2, ¶ 3. Thus, the second amended complaint still contains a defective allegation.

The Court will provide plaintiff one further opportunity to establish the citizenship of all parties and show that the Court has subject matter jurisdiction over this action.

For the foregoing reasons, it is

ORDERED that, on or before 5:00 p.m. on December 22, 2017, plaintiff David H. Hanson shall show cause why this case should not be dismissed due to the Court's lack of subject matter jurisdiction.