OPINION

TASHIMA, Circuit Judge.

Colbert Thompson pled guilty to distribution of fewer than five grams of crack cocaine, but his sentencing range was ultimately calculated based on his classification as a career offender. After the United States Sentencing Commission issued a retroactive amendment to the Sentencing Guidelines that lowered the base offense levels for crack cocaine offenses, Thompson moved to reduce his sentence pursuant to 18 U.S.C. § 3582(c)(2). He conceded, however, that United States v. Mateo, 560 F.3d 152 (3d Cir.2009), foreclosed his argument, and the District Court denied the motion. On appeal, Thompson requests that the panel reconsider Mateo in light of Freeman v. United States, ___ U.S. ___, 131 S.Ct. 2685, 180 L.Ed.2d 519 (2011). We conclude that Mateo remains good law and therefore will affirm.

I

In 2002, Thompson was indicted on two counts, and pled guilty to one, of distributing fewer than five grams of crack cocaine in violation of 21 U.S.C. § 841(a)(1). Because Thompson had two prior felony convictions, he qualified for treatment as a career offender under the Guidelines. See U.S. Sentencing Guidelines Manual ("U.S.S.G.") § 4B1.1 (2002).1

This was consequential. The Guideline for career offenders has its own sentencing ranges, with offense levels determined by reference to the statutory maximum sentences authorized for various offenses of conviction. See id. If the career offender offense level "is greater than the offense level otherwise applicable, the offense level from the [career offender] table ... shall apply." Id. § 4B1.1(b). In Thompson's case, the career offender offense level was much greater than the offense level "otherwise applicable" — that is, the offense level for distribution of fewer than five grams of crack cocaine. As calculated by the Probation Office in its PSR, Thompson's crack cocaine offense yielded a base offense level of 20, see id. § 2D1.1(a)(3), (c)(10); his career offender offense level was 32, see id. § 4B1.1(b)(3) (listing an offense level of 32 for offenses with a statutory maximum of 20 years' imprisonment); 21 U.S.C. § 841(b)(1)(C) (providing for a 20-year maximum for the crack cocaine offense to which Thompson pled guilty). Thus, in effect, Thompson's career offender offense level made his crack cocaine base offense level irrelevant.

The career offender designation altered Thompson's Guidelines range in another respect, too. According to the PSR, Thompson's prior criminal convictions resulted in a criminal history score of 12 and a criminal history category of V. See U.S.S.G. ch. 5, pt. A (sentencing table). But, as a career offender, Thompson was assigned a criminal history category of VI. See id. § 4B1.1(b) (mandating a criminal history category of VI for career criminals).

Based on a total offense level of 292 and a criminal history category of VI, Thompson's Guidelines range was determined to be 151 to 188 months' imprisonment. See id. ch. 5, pt. A (sentencing table). Had Thompson not been classified as a career offender, his Guidelines range would have been 46 to 57 months. See id.

At sentencing, Thompson's counsel requested a downward departure on the ground that the career offender designation over-represented his prior record. The District Court denied that request and sentenced Thompson to 151 months in prison, the bottom of the career offender range. Thompson appealed. This Court affirmed the District Court's designation of Thompson as a career criminal and otherwise dismissed the appeal. United States v. Thompson, 88 Fed.Appx. 480 (3d Cir.2004).

In 2008, the Sentencing Commission retroactively reduced the base offense levels for crack cocaine offenses. See U.S.S.G. app. C, amend. 706 (Nov. 2010) (effective Nov. 1, 2007) (adjusting Guidelines); id. amend. 713 (effective Mar. 3, 2008) (making Amendment 706 retroactive). The following year, in Mateo, we considered whether a crack cocaine offender sentenced as a career offender was eligible for a sentence reduction based on the recent Guidelines amendment to crack cocaine offense levels. We concluded that he was not. Mateo, 560 F.3d at 156. To be eligible for a reduction in sentence pursuant to § 3582(c)(2), a defendant must have "been sentenced to a term of imprisonment based on a sentencing range that has subsequently been lowered by the Sentencing Commission...." 18 U.S.C. § 3582(c)(2). That means, we said, that a § 3582(c)(2) reduction is available only if the Guidelines amendment has "the effect of lowering the sentencing range actually used at sentencing." Mateo, 560 F.3d at 155 (internal quotation marks omitted) (emphasis added). The crack cocaine amendment had no effect on Mateo's sentencing range: it altered the calculation of the base offense level for his crack cocaine offense, but not the calculation of the career offender Guidelines range actually used to compute his Guidelines sentence. Accordingly, we held that § 3582(c)(2) relief was unavailable to Mateo. Id. at 156.

In 2011, the Supreme Court decided Freeman, a case concerning the availability of § 3582(c)(2) relief based on the crack cocaine amendment to the Guidelines. After Freeman was decided, Thompson filed a motion to reduce his sentence under § 3582(c)(2). He conceded that Mateo foreclosed his motion, but argued that Mateo should be revisited in light of Freeman. Bound by Mateo, the District Court denied Thompson's motion. This timely appeal followed.

II

The District Court had jurisdiction pursuant to 18 U.S.C. § 3231, and we have appellate jurisdiction under 28 U.S.C. § 1291. The single issue in this case — whether, given Freeman, we should overrule Mateo — is a question of law over which we exercise plenary review. United States v. Flemming, 617 F.3d 252, 257 (3d Cir.2010).

III

Thompson concedes that Mateo controls this case. As in Mateo, Thompson was convicted of a crack cocaine offense; as there, Thompson's sentencing range was ultimately calculated based on his status as a career offender rather than as a crack cocaine offender. Thompson asks us to reconsider Mateo because, he contends, both the plurality and concurring opinions in Freeman "called Mateo's narrow interpretation of the statutory meaning of `based on' into question." We do not agree.

In Freeman, the defendant had entered a guilty plea pursuant to a plea agreement under Federal Rule of Criminal Procedure 11(c)(1)(C). Freeman, 131 S.Ct. at 2691. Such an agreement allows the parties to bind the district court to a pre-agreed sentence if the court accepts the plea. See Fed.R.Crim.P. 11(c)(1)(C) (a sentence or sentencing range "recommendation or request [under this provision] binds the court once the court accepts the plea agreement"). The question in Freeman was whether a sentence imposed pursuant to a Rule 11(c)(1)(C) plea agreement can be "based on" a sentencing range within the meaning of § 3582(c)(2). Freeman, 131 S.Ct. at 2691.

The question divided the Court. Justice Kennedy, writing for four Justices, delivered the judgment of the Court that a defendant can be eligible for such relief. Id. at 2690 (Kennedy, J.). But the plurality's rationale differed markedly from that of Justice Sotomayor, who concurred in the judgment and supplied the necessary fifth vote. See id. at 2695 (Sotomayor, J., concurring). Justice Kennedy wrote that a sentence imposed pursuant to a binding Rule 11(c)(1)(C) agreement is still "based on" a Guidelines sentencing range, as long as "the sentencing range in question was a relevant part of the analytic framework the judge used to determine the sentence or to approve the agreement." Id. at 2692-93 (Kennedy, J.). Even in the context of a Rule 11(c)(1)(C) agreement, the defendant's Guidelines range matters: it informs the judge's "decision to accept the plea," a decision that entails "impos[ing] the recommended sentence." Id. at 2690; see id. at 2692 (stating that the relevant Guidelines policy statement "forbids the district judge to accept an 11(c)(1)(C) agreement without first evaluating the recommended sentence in light of the defendant's applicable sentencing range"). Justice Kennedy concluded that "the district court has authority to entertain § 3582(c)(2) motions when sentences are imposed in light of the Guidelines, even if the defendant enters into an 11(c)(1)(C) agreement." Id. at 2693.

Justice Sotomayor took a different approach. In her view, "the term of imprisonment imposed by a district court pursuant to an agreement authorized by Federal Rule of Criminal Procedure 11(c)(1)(C) ... is `based on' the agreement itself, not on the judge's calculation of the Sentencing Guidelines." Id. at 2695 (Sotomayor, J., concurring). But she identified two exceptions: (1) where the plea agreement itself "call[s] for the defendant to be sentenced within a particular Guidelines sentencing range," or (2) where it makes clear that "the basis for the specified term is a Guidelines sentencing range applicable to the offense to which the defendant pleaded guilty." Id. at 2697. Because Freeman's plea agreement clearly stated that his sentence would be "determined pursuant to the Sentencing Guidelines," and recommended a sentence that was "evident[ly]" based on the figure at the bottom end of Freeman's Guidelines range, his plea agreement satisfied an exception to Justice Sotomayor's general rule. Id. at 2699-2700. She therefore concurred in the judgment. Id.

IV

As a three-judge panel we are, of course, obliged to follow prior decisions of our Court, except "when the prior decision conflicts with a Supreme Court decision." United States v. Tann, 577 F.3d 533, 541 (3d Cir.2009). To determine whether Mateo conflicts with Freeman in any respect, we must first decide which opinion in Freeman controls.

In a splintered Supreme Court decision where "no single rationale explaining the result enjoys the assent of five Justices, the holding of the Court may be viewed as that position taken by those Members who concurred in the judgments on the narrowest grounds." Marks v. United States, 430 U.S. 188, 193, 97 S.Ct. 990, 51 L.Ed.2d 260 (1977) (internal quotation marks and citations omitted). The standard established in Marks is designed "to promote predictability in the law by ensuring lower court adherence to Supreme Court precedent." Jackson v. Danberg, 594 F.3d 210, 220 (3d Cir.2010) (internal quotation marks omitted). Its objective is "that, whenever possible, there be a single legal standard for the lower courts to apply in similar cases and that this standard, when properly applied, produce results with which a majority of the Justices in the case articulating the standard would agree." Id. (internal quotation marks omitted). Even so, Marks applies only "where one opinion can be meaningfully regarded as `narrower' than another and can represent a common denominator of the Court's reasoning." Berwind Corp. v. Comm'r of Soc. Sec., 307 F.3d 222, 234 (3d Cir.2002) (internal quotation marks and citation omitted).

Applying these principles, in Jackson, we concluded that "the Marks framework applies where one opinion is clearly `narrower' than another, that is, where one opinion would always lead to the same result that a broader opinion would reach." Jackson, 594 F.3d at 222. Justice Sotomayor's concurrence in Freeman conforms to that description. "[T]he [Freeman] plurality would surely agree that in every case in which a defendant's [Rule 11(c)(1)(C)] plea agreement satisfies the criteria for Justice Sotomayor's exception by expressly using a Guidelines sentencing range applicable to the charged offense to establish the term of imprisonment, the sentencing judge's decision to accept that sentence is based on the guidelines." United States v. Rivera-Martinez, 665 F.3d 344, 348 (1st Cir.2011) (internal citation, quotation marks, and alterations omitted). The converse, however, is not true; sentences imposed pursuant to Rule 11(c)(1)(C) plea agreements will frequently be eligible for § 3582(c)(2) sentence reductions under Justice Kennedy's framework, but ineligible for reductions under Justice Sotomayor's.

We therefore conclude, as has every other circuit to consider the question, that, because Justice Sotomayor's opinion is narrower than Justice Kennedy's, it expresses the holding of the Court. See United States v. Austin, 676 F.3d 924, 926 (9th Cir.2012); Rivera-Martinez, 665 F.3d at 345; United States v. Brown, 653 F.3d 337, 340 n. 1 (4th Cir.2011); United States v. Smith, 658 F.3d 608, 611 (6th Cir.2011); United States v. White, 429 Fed.Appx. 43, 47 (2d Cir.2011) (unpublished).

V

Having decided that Justice Sotomayor's concurrence is the opinion that binds us, we have little difficulty concluding that Mateo's interpretation and application of § 3582(c)(2) is consistent with it. Section 3582(c)(2) authorizes a sentence reduction if the defendant was sentenced "based on a sentencing range that has subsequently been lowered by the Sentencing Commission." 18 U.S.C. § 3582(c)(2). In her concurrence, Justice Sotomayor parsed this rule into two parts: first, the sentence must be "based on" a Guidelines range; second, a Guidelines amendment must have the "effect of lowering" that Guidelines range. See Freeman, 131 S.Ct. at 2700 (Sotomayor, J., concurring) (internal quotation marks omitted).

Thompson argues that Freeman's and Mateo's analyses of the first part cannot be squared. We disagree; the two decisions simply addressed different questions about that condition for relief. Freeman dealt with one interpretive question: whether a sentence imposed pursuant to a Rule 11(c)(1)(C) plea agreement can be "based on" a sentencing range at all. See id. Mateo addressed another: whether a sentence can be "based on" a sentencing range other than the range actually used at sentencing.

In evaluating this question in Mateo, we examined the phrase "based on a sentencing range" in its context. See Mateo, 560 F.3d at 155. We decided that "the term `sentencing range' clearly contemplates the end result of the overall guideline calculus, not the series of tentative results reached at various interim steps in the performance of that calculus." Id. (quoting United States v. Caraballo, 552 F.3d 6, 10 (1st Cir.2008) (alterations omitted)). Therefore the salient sentencing range was the one "actually used at sentencing." Id. (internal quotation marks omitted). To meet the first condition of § 3582(c)(2), a defendant's sentence must be based on the actual, calculated Guidelines range upon which the district court relied at sentencing.3

Our reading of § 3582(c)(2) in Mateo is fully consistent with Justice Sotomayor's understanding that a sentence "based on" a Guidelines sentencing range is one where the "range serves as the basis or foundation for the term of imprisonment." See Freeman, 131 S.Ct. at 2695 (Sotomayor, J., concurring). Justice Sotomayor did not suggest that more than one Guidelines range could serve as the "basis or foundation" of the sentence, and the range that fits her definition best is the one at the end of the court's Guidelines calculation, not one of its "tentative results" along the way.4

In sum, Justice Sotomayor's opinion provides no reason to overrule Mateo. Mateo therefore remains binding on this panel, and it requires that we affirm the District Court's denial of § 3582(c)(2) relief.5

CONCLUSION

For the foregoing reasons, we will affirm the order of the District Court denying Thompson's motion for a reduction of sentence pursuant to 18 U.S.C. § 3582(c)(2).