Opinion for the Court filed by Circuit Judge WILLIAMS.
Ovеr the 1990s, and even farther back, vitamin manufacturers allegedly fixed prices on bulk vitamin sales in violation of the antitrust laws. By September 1999 a Department of Justice investigation had secured guilty pleas from several major suppliers. Dozens of private antitrust actions followed, and by late November 1999 approximately 49 cases were pending before the district court.
At a status conference for all interested parties on November 3, 1999, counsel for the proposed representatives of a broad class of purchasеrs revealed that they had reached a tentative settlement that would dispose of the class’s claims against seven of the defendants (who together with their affiliates account for more than 90 percent of the bulk vitamins market). The then-draft agreement contained a so-called “most favored nation” (“MFN”) clause, requiring defendants to hike their payments to the class in the event that within two years of that date they reached a more favorable settlement with a plaintiff who had opted out of the class. See Settlement Agreement ¶¶ 1, 22. Appellants — who were then presumptive members of the class but who have since opted out — moved to intervene under Federal Rule of Civil Procedure 24 for the limited purpose of opposing the MFN clause. They argued— reasonably enough — that the clause would make it harder for them to arrive at an independent settlement, because it would raise the cost to defendants of any more favorable agreement. The district court denied the appellants’ motion to intervene but granted them leave to particiрate as amici curiae. Appellants filed timely notices of appeal from denial of the motion to intervene.
While this appeal was pending, appellants all chose to opt out of the class action. See Tr. of Oral Arg. (Apr. 3, 2000), at 4. The district court hеld its final hearing regarding class certification and the proposed settlement, and on March 31, 2000 certified the class and approved the settlement. Neither of those decisions is at issue in this appeal.
In rejecting appellants’ motion for intervention, the district court reasoned that they lacked standing to challenge the settlement agreement on the grounds asserted. We agree.
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Appellants focus on their claim to intervention as of right. Federal Rule of Civil Procedure 24(a)(2) allows such intervention for anyone who “claims аn interest relating to the ... transaction which is the subject of the action and ... is so situated that the disposition of the action may as a practical matter impair or impede [his] ability to protect that interest, unless [his] interest is adequately represented by existing parties.” Id, Appellants argue that their interest in being able to opt out of the class and to “ ‘go it alone’ unhampered by any judgment in the class action” qualifies as “an interest relating to the ... transaction which is the subject of the action.” Fed.R.Civ.P. 24(a).
But appellants trip immediately over our decision in Mayfield v. Barr, 985 F.2d 1090 (D.C.Cir.1993). There we held that class members who have opted out of a 23(b)(3) class action have no standing to object to a *29 subsequent class settlement; by opting out they “escape the binding effect of the class settlement.” Id. at 1093. We distinguished cases in which plaintiffs lost claims involuntarily, and concluded:
Our decision rests on the principle that those who fully preserve their legal rights cannot challenge an order approving an agreement resolving the legal rights of others.
Id.
Compare
New Mexico ex rel. Energy & Minerals Dep’t v. United States Dep’t of the Interior,
Appellants point to a number of cases in which we indicated a willingness to construe Rule 24(a)’s “interest” requirement liberally. See
Cook v. Boorstin,
Standing, of course, is issue-specific. See
Lujan v. Defenders of Wildlife,
But as appellants’ counsel admitted at oral argument, their interests are not congruent with the interests of the settling class that were in play at the time of their motion to intervene. See Tr. of Oral Arg. at 13-14. As opt-out plaintiffs they have no interest in the specifics оf the settlement except for their desire to be free of a troublesome MFN clause. Id. at 14.
Appellants’ MFN objection is, moreover, incongruent with the interests that the rules charge the district court with addressing. When appellants moved to intervene, the court had remaining bеfore it the questions of whether (1) the proposed class satisfied the prerequisites for certification under Rule 23(a) and (b), (2) the form and manner of notice satisfied Rule 23(c), and (3) the proposed settlement satisfied the requirements of Rule 23(e). Appellants’ arguments against the MFN clause have no logical relationship to any of these. The first two questions are clearly irrelevant to appellants’ claims. Appellants do not seek to argue that the proposed class failed to satisfy the conditions for class certificatiоn. See Fed. R.Civ.P. 23(a), (b)(3). And appellants’ Rule 23(c) arguments — which are treated more fully below — do not challenge the form and manner of notice at all.
*30 On the subject of class viability an extra word is needed for appellant Nutra-Blend. According to its complaint, some of the settling defendants compete with Nutra-Blend, selling mixed vitamin products at retail prices below their wholesale charges for the raw components and thus subjecting Nutra-Blend to a “price squeeze.” Accordingly it has argued that the class representatives do not adequately represent its interests. This of course sounds like the inquiry under Rule 23(a)(4) as to adequacy of representation. But Nutra-Blend’s objections were not made on the premise assumed by Rule 23(a) — namely, that the prospective class member would be bound by the ensuing litigation supposedly conducted on its behalf. 1
Of course, in passing on the proposed settlement agreement, the district court has a duty under Fed.R.Civ.P. 23(e) to ensure that it is fair, adequate, and reasonable and is not the product of collusion between the parties. See
Pigford v. Glickman,
Appellants’ only mention of the class’s interests appears in a footnote in which they argue that the class will not аctually benefit from the MFN clause. But even here they do not say that its inclusion actually harms the class members. Of course they might argue that in securing the MFN clause the class representatives must have traded away some alternative (and real) advantage. But that argument’s force would turn on a showing that defendants seriously resisted the clause, on which appellants offer no evidence. In fact the defendants may well not have much resisted, affirmatively liking a Ulysses-tied-to-the-mast arrangement that enables them to convincingly stiff opt-outs who demаnd more. Cf. Decl. of William M. Landes at 8-9 (excerpted at Joint Appendix 246). In any event, appellants do not deny that their sole actual concern is that the MFN clause limits their ability to reach a settlement more lucrative than that offered to the class. Consequently, their arguments fall outside of the zone of interests protected by Rule 23(e).
Appellants’ alternative tack invokes their right to opt out, starting with the notice protections of Rule 23(c)(2). But the rule by its terms is purely procedural. Any substantive right to be free of ancillary effects flowing from a class settlement must be found elsewhere.
Appellants next look to the Due Process Clause (presumably of the Fifth Amendment) for their claimed right to be free of any effects of the class settlement. It is, of course, not in dispute that notice and an opportunity to opt out are requirements of due process — for any party to be bound by the litigation. See Fed.R.Civ.P.
*31
23, Advisory Committee Notes to the 1966 Amendment for Subdivision (d)(2) (“This mandatory notice pursuant to subdivision (c)(2) ... is designed to fulfill requirements of due process to which the class action procedure is of course subject.”);
Ortiz v. Fibreboard Corp.,
Indeed, as
Mayfield
makes clear, one may challenge a settlement agreement to which he is not a party if the agreement will cause him “ ‘plain legal prejudice,’ as when ‘the settlement strips the party of a legal claim or cause of action.’ ”
Mayfield,
Other cases have turned on a similar understanding of “plain legal prejudice.” In
Quad/Graphics, Inc. v. Fass,
Finally, we turn to appellants’ argument that the district court abused its discretion in denying them permissive intervention under Rule 24(b)(2). Although the denial of a motion for permissive intervention is not normally appealable in itself, see
Twelve John Does v. District of Columbia,
But there is uncertainty over whether standing is necessary for permissive intervention. Compare
EEOC v. National Children’s Ctr., Inc.,
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The district court’s decision is
Affirmed.
Notes
. We have no occasion to decide whether a party must remain within the class to intervene for the purposes of challenging class certification under Rule 23(a), (b), or settlement under 23(e). Cf.
In re Brand Name Prescription Drugs Antitrust Litig.,
