A motion to dismiss a complaint for lack of personal jurisdiction and forum non conveniens may properly attach matters outside the pleadings.   The Ninth Circuit has long held that for the purposes of considering a motion to dismiss on the grounds of subject matter jurisdiction, a court may consider matters outside the pleadings.  See generally Association of American Medical Colleges v. U.S., 217 F.3d 770, 778 (9th Cir. 2000).  “There never has been any serious doubt as to the availability of extra-pleading material on these motions.”  Michel v. Am. Capital Enterprises, Inc., 884 F.2d 582 (9th Cir. 1989) (quoting 5 C. Wright & A. Miller, Federal Practice and Procedure: Civil § 1366, at 676 (1969) (footnote omitted)).

That fact does not allow the Court to thereafter consider those same documents on a Rule 12(b)(6) motion, however.  The Court may similarly entertain a motion for injunctive relief and thereafter consider a Rule 12(b)(6) without considering the matters once before the Court.  See Santa Monica Community College v. Mason, 952 F.2d 407, 1991 WL 270727, *3 (9th Cir. 1991) (concluding that the submission of declarations and exhibits from a motion for preliminary injunction to the court on a motion to dismiss constitutes submission of matters outside the pleadings).

In fact, several courts have entertained such motions at the same time (motion to dismiss for lack of jurisdiction and for failure to state a claim) and have allowed the outside documents for the jurisdictional analysis, but refused to allow them for the Rule 12(b)(6) purposes.  U.S. E.E.O.C. v. Pioneer Hotel, Inc., No. 2:11-CV-1588-LRH-RJJ, 2013 WL 129390, at *2 (D. Nev. Jan. 9, 2013) reconsideration denied, No. 2:11-CV-1588-LRH-GWF, 2013 WL 3353389 (D. Nev. July 2, 2013) (considered matters outside pleadings when determining Motion to Dismiss for lack of jurisdiction, but refused to consider regarding Rule 12(b)(6) for failure to state a claim upon which relief may be granted); Osborn v. United States, 918 F.2d 724, 729 (8th Cir. 1990); Stewart v. Screen Gems-EMI Music, Inc., 81 F. Supp. 3d 938, 951 (N.D. Cal. 2015) (citing Righthaven, LLC v. Va. Citizens Def. League, Inc., No. 1:10–cv–01783–GMN, 2011 WL 2550627, at *6 & n. 1 (D. Nev. June 23, 2011) (considering a declaration in the context of determining personal jurisdiction but not to determine the sufficiency of the complaint); High v. Choice Mfg. Co., No. C–11–5478– EMC, 2012 WL 3025922, at *4–6 (N.D. Cal. July 24, 2012) (where both personal jurisdiction and the sufficiency of the complaint both turned on the question of alter ego, considering extra-pleading evidence with respect to the 12(b)(2) challenge but excluding the extra-pleading evidence from the 12(b)(6) analysis); Abosakem v. Royal Indian Raj Int’l Corp., No. C–1001781 MMC, 2011 WL 635222, at *10 n. 7 (N.D. Cal. Feb. 11, 2011) (considering a declaration in the context of determining personal jurisdiction but not to determine the sufficiency of the complaint)).