OPINION OF THE COURT
Saudi Basic Industries Corporation (“SABIC”) appeals from the District Court’s order denying its motion to dismiss, based on' sovereign immunity, the claims of two ExxonMobil subsidiaries, Mobil Yanbu Petrochemical Company (‘Yanbu”) and Exxon Chemical Arabia, Inc. (“ECAI”). We do not reach the foreign sovereign immunity question, however, because we determine that the Rooker-Feldman doctrine bars federal subject matter jurisdiction over the subsidiaries’ claims, which have been already decided in state court.
I.
Facts and Procedural Posture
In 1980, SABIC and the Exxon (now ExxonMobil) subsidiaries formed two joint venture entities. One, called Yanpet, was the joint venture between SABIC and Yanbu, and another, called Kemya, was the joint venture between SABIC and ECAI. Two decades later, the parties began to dispute the propriety of royalties SABIC had charged to the joint venture entities for the sublicense to a polyethylene manufacturing method called the Uni-pol® process. In September 2000 SABIC sued Yanbu and ECAI in the Delaware Superior Court seeking a declaratory judgment that these royalty charges did not violate the joint venture agreements with Yanbu and ECAI. Later that same month ExxonMobil, Yanbu, and ECAI counter-sued SABIC in the United States District Court for the District of New Jersey (Civil Action No. 00-3841), seeking the converse declaratory judgment — that SABIC had overcharged the joint venture entities for the sublicense in violation of the joint venture agreements.
In January 2002, Yanbu and ECAI filed an answer to SABIC’s state court complaint, asserting as counterclaims the same claims they had filed in their federal court complaint. In March 2003, after a two-week trial in the Delaware Superior Court, the jury returned a $416,880,764 verdict against SABIC in favor of ExxonMobil. SABIC has appealed the verdict, which is currently pending in the Delaware Supreme Court.
Prior to the state court trial, SABIC moved to dismiss ExxonMobil’s federal court action, asserting foreign sovereign immunity. The District Court denied the motion on April 3, 2002.
Saudi Basic Indus. Corp. v. ExxonMobil Corp.,
II.
Jurisdiction
A. Appellate Jurisdiction
We generally do not have jurisdiction to review interlocutory decisions such as the denial of a motion to dismiss. Under the collateral order doctrine,
1
however,
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we have recognized exceptions to this rule. One well-established exception is for orders denying motions to dismiss for reasons of immunity.
See, e.g., In re Montgomery County,
B. Rooker-Feldman Doctrine
Determining that appellate jurisdiction is proper in a case does not end our jurisdictional inquiry. We have a “continuing obligation to
sua sponte
raise the issue of subject matter jurisdiction when it is in question.”
Desi’s Pizza, Inc. v. City of Wilkes-Barre,
The
Rooker-Feldman
doctrine, derived from two Supreme Court cases—
Rooker v. Fidelity Trust Co.,
The state level decision need not be of its highest court. The
Rooker-Feldman
doctrine applies equally to final decisions of lower state courts.
FOCUS,
Here there is no dispute that ExxonMo-bil’s claims are identical to the claims upon which the Delaware Superior Court reached a final judgment. Thus, though our Court takes a narrow view of the
Rooker-Feldman
doctrine,
Parkview
As-
socs. P’ship,
ExxonMobil argues that the “actually litigated” circumstance does not trigger
*105
Rooker-Feldman
because the March 2003 state court judgment was not reached pri- or to ExxonMobil’s filing of the federal action in August 2000. It cites to
Desi’s Pizza,
in which we said
Rooker-Feldman
bars a claim “if the claim was ‘actually-litigated’ in state court prior to the filing of the federal action,”
ExxonMobil also argues that
Rook-er-Feldman
should not apply in this case because it is not a party to the action in Delaware state court, in which only its subsidiaries, Yanbu and ECAI, are defendants. Indeed, we have consistently (and recently) held that
Rooker-Feldman
does not bar claims of plaintiffs who were not parties to the state court proceeding.
See Nat’l R.R. Passenger Corp. v. Pa. Pub. Util. Comm’n,
As ExxonMobil’s federal claims were “actually litigated” in state court, we need not analyze whether, under the alternative prong of the
Rooker-Feldman
doctrine, they were “inextricably intertwined with a previous state court adjudication.”
Parkview Assocs. P’ship,
* * * * * *
Because ExxonMobil’s federal claims were identical to the claims in which the Delaware Superior Court reached a final judgment, they are barred by the Rooker-Feldman doctrine. Even within our Court’s narrow confines for Rooker-Feld-man, this case is easily cabined. We cannot imagine a more classic invocation of the Rooker-Feldman jurisdictional bar than to preclude a party from maintaining a federal action as ah “insurance policy” in case the state trial court decision in that party’s favor is overturned by an appellate state court. We therefore vacate those aspects of the District Court’s order addressing Civil Action No. 00-3841, the subject of this appeal, and remand with instructions to dismiss that action for lack of subject matter jurisdiction.
Notes
. The collateral order doctrine excepts a “narrow range” of interlocutory decisions from the general rule that only final orders are appealable.
In re Montgomery County,
