Appeal from the United States District Court for the Eastern District of New York No. 21-cv-6072, Choudhury, Judge .

Before: ROBINSON, NATHAN, and KAHN, Circuit Judge s.

Page 2Plaintiff seeks to represent a class of participants in a defined benefit retirement plan under the Employee Retirement Income Security Act (ERISA), alleging that the plan systematically violates ERISA by using outdated actuarial assumptions in calculating benefits. The plaintiff invokes two of ERISA’s remedial provisions: relief on behalf of the plan (in the form of plan reformation and monetary repayment to the plan) through a Section 502(a)(2) representative action and relief for herself and other participants under Section 502(a)(3). Pursuant to an agreement between the plaintiff and her former employer, the district court compelled individual arbitration of the Section 502(a)(3) claim. We hold that the plaintiff has standing to seek, on behalf of the plan under Section 502(a)(2), plan reformation but not monetary payments to the plan; that the effective vindication doctrine precludes mandatory arbitration of that claim; and that the district court did not err in denying a motion for a mandatory stay of litigation. Given the posture of this appeal, we do not consider whether the plan reformation the plaintiff seeks is, in fact, available as a remedy under Section 502(a)(2). AFFIRMED in part and REVERSED in part.

RACHANA PATHAK, Stris & Maher LLP, Cerritos, CA, (Peter K. Stris, Jeff Hahn, Stris & Maher LLP, Cerritos, CA, Michelle C. Yau, Ryan A. Wheeler, Cohen Milstein Sellers & Toll PLLC, Washington, DC, Kai Richter, Cohen Milstein Sellers & Toll PLLC, Minneapolis, MN, on the brief ), for Plaintiff-Appellee .

Page 3JEREMY P. BLUMENFELD, Morgan, Lewis & Bockius, LLP, Philadelphia, PA, Keri L. Engelman, Morgan, Lewis & Bockius LLP, Boston, MA, (Michael E. Kenneally, Morgan, Lewis, & Bockius LLP, Washington, DC, on the brief ), for DefendantsAppellants .

NATHAN, Circuit Judge :

When Janet Duke retired, she elected to receive retirement benefits for herself and any surviving spouse. Federal law, pursuant to the Employee Retirement Income Security Act (ERISA), requires those benefits to be equivalent to what Duke would receive if she were unmarried. She also signed a dispute resolution agreement with her former employer subjecting various disputes between them to individual arbitration. Duke now seeks to represent herself and a class of similarly situated retirees, arguing that her pension plan calculated her benefits using unreasonably outdated actuarial assumptions, decreasing her monthly payments relative to what she would have received if she were unmarried at the time of her retirement in violation of ERISA. She also seeks, on behalf of her pension plan, reformation of the plan and repayment from its fiduciaries. Below, the district court held Duke has standing to assert these claims, compelled arbitration of Duke's individual claims, and concluded that thePage 4 “effective vindication” doctrine precludes individual arbitration of her claims on behalf of the pension plan. The district court also denied Defendants’ motion for a mandatory stay of litigation while Duke’s individual claims proceed in arbitration. We hold that Duke has standing to seek reformation of the pension plan but not monetary payments to it, that her representative claim is not subject to individual arbitration, and that the district court properly exercised its discretion to deny Defendants’ motion for a stay.

Janet Duke worked as a regional manager for Luxottica U.S. Holdings Corp. (Luxottica) for nearly 21 years.¹ That job entitled her to a pension upon retirement, to be paid out of the Luxottica Group Pension Plan (the Plan), managed by the Luxottica Group ERISA Plans Compliance and Investment Committee (the Committee). Because the Plan pays a fixed retirement benefit to participants regardless of the market value of the Plan’s assets, it is a “defined benefit plan.” See 29 U.S.C. § 1002(34)-(35); see also Hirt v. Equitable Ret. Plan for Emps., Managers, & Agents , 533 F.3d 102, 104–05 (2d Cir. 2008).

When Duke retired, she had the choice of two types of pension benefits. The first, a single life annuity (SLA), would entitle her—and only her-to a fixed monthly benefit for the rest of her life. The alternative, a joint and survivor annuity (JSA), would entitle her to a fixed monthly benefit for the rest of her life, plus a monthly fractionPage 5 (i.e., 50% to 100%) of that benefit paid to any surviving spouse for the rest of the spouse’s life. The JSA option is the default form of pension benefit for married retirees, and ERISA requires it be the “actuarial equivalent” of a hypothetical SLA that the employee would receive instead. See 29 U.S.C. § 1055(d)(1)(B). To comply with ERISA’s JSA actuarial equivalence requirement, the Committee employs “actuarial assumptions” to convert the SLA benefit into a JSA benefit. Those assumptions include an interest rate—to measure the changing value of monetary benefits over time—and the anticipated longevity of a plan participant and her spouse.

On November 1, 2016, Duke elected to receive a JSA that would pay 100% of her monthly benefit to any surviving spouse. At the time, the Committee (as fiduciary of the Plan) converted SLAs into JSAs using a 7% annual interest rate and life expectancy values published in 1971. On April 1, 2021, the Committee updated the longevity assumptions it used to perform SLA-JSA conversions.² But for JSA participants like Duke whose benefits were calculated before April 1, 2021, the Committee continues to pay benefits based on the SLA-JSA conversion that assumed life expectancy values published in 1971. According to Duke, these outdated assumptions decrease her monthly benefit by roughly $54. She contends, also, that using the outdated assumptions means the Plan is perpetually out of Page 6compliance with ERISA and may suffer follow-on tax consequences as a result.

On November 1, 2021, Duke filed a putative class action complaint against Luxottica, Oakley, Inc. (a subsidiary of Luxottica), the Committee, and the Plan (collectively, Defendants or Appellants), seeking to represent herself and other Plan participants and beneficiaries receiving JSA benefits calculated before April 1, 2021. The complaint asserts four claims: first, a violation of ERISA’s JSA equivalence requirement, 29 U.S.C. § 1055(a)–(d); second, a violation of ERISA’s equivalence requirement for accrued benefits, id. § 1054(c)(3); third, a violation of ERISA’s rules prohibiting forfeiture of retirement benefits, id. § 1053(a); and fourth, a breach of ERISA's fiduciary duty obligations, id. § 1104(a)(1)(A), (B), (D). The purported violation underlying all claims is the same-the Committee's use, before April 1, 2021, of allegedly outdated actuarial assumptions in converting SLAs into JSAs. And for all claims, Duke seeks relief under two of ERISA’s remedial provisions—relief on behalf of the Plan, under Section 502(a)(2), codified at 29 U.S.C. § 1132(a)(2); and relief on behalf of herself and other Plan participants, under Section 502(a)(3), codified at 29 U.S.C. § 1132(a)(3). Most important for present purposes, Duke seeks both reformation of the Plan to update its actuarial assumptions used to convert SLAs into JSAs, as well as monetary restitution to the Plan in the form of loss restoration and disgorgement of profits.³

Page 7Defendants moved to compel arbitration, citing a provision of a Dispute Resolution Agreement (the Agreement) that Duke signed in 2015. In relevant part, the Agreement purports to require arbitration of “disputes . . . arising out of or related to the employment relationship or the termination of that relationship (including post-employment defamation or retaliation), trade secrets, . . . discrimination or harassment and claims arising under the . . . Employee Retirement Income Security Act []except for claims for employee benefits under any benefit plan[.]” Joint App’x 144–45. In particular, Defendants moved to compel individual arbitration of Duke's claims, citing the Agreement's class action waiver, which requires that Duke “bring any dispute in arbitration on an individual basis only, and not on a class, collective or private attorney general representative basis on behalf of others.” Id. 145. Defendants also moved in the alternative to dismiss Duke’s claims for lack of standing and for failure to state a claim.

The district court originally granted Defendants' motions in part, concluding that Duke lacks standing to seek relief on behalf of the Plan under Section 502(a)(2), pursuant to Thole v. U.S. Bank N.A. , 590 U.S. 538 (2020), and that the parties' Agreement requires individual arbitration of her claims for relief under Section 502(a)(3). Duke v. Luxottica U.S. Holdings Corp. ( Duke I ), No. 21-cv-6072, 2023 WLPage 8 6385389, at *5-6, 11 (E.D.N.Y. Sept. 30, 2023).⁴ But after the case was reassigned to a different district court judge and Duke moved for reconsideration, the district court issued a new opinion concluding that Duke has standing to press a claim under Section 502(a)(2) on behalf of the Plan for both reformation and monetary payments to the Plan, and further that the “effective vindication” doctrine precludes mandatory individual arbitration of that claim. Duke v. Luxottica U.S. Holdings Corp. ( Duke II ), No. 21-cv-6072, 2024 WL 4904509, at *1, *16 (E.D.N.Y. Nov. 27, 2024). The district court also denied Defendants’ alternative request to stay litigation of the claims under Section 502(a)(2) pending arbitration of the claims under Section 502(a)(3), rejecting the argument that such a stay is mandatory under the Federal Arbitration Act (FAA) and finding that its discretion counseled in favor of permitting the claims to proceed simultaneously. See id. at *20-22. Defendants timely filed a notice of interlocutory appeal of the denial of the motion to compel arbitration and of the motion to stay. Cf. 9 U.S.C. § 16(a)(1)(A)-(B).

We review de novo facial challenges to a plaintiff's standingi.e., challenges “based solely on the allegations of the complaint and Page 9exhibits attached to it .” Sonterra Cap. Master Fund Ltd. v. UBS AG , 954 F.3d 529, 533 (2d Cir. 2020) (cleaned up). We also review de novo the district court’s disposition of the motions to compel arbitration and for a mandatory stay under the FAA. See Katz v. Cellco P’Ship , 794 F.3d 341, 344 n.4 (2d Cir. 2015).

We must begin by assuring ourselves of the Court’s jurisdiction over this appeal. See Marquez v. Silver , 96 F.4th 579, 582 (2d Cir. 2024). In general, our appellate jurisdiction is limited to reviewing final judgments. See 28 U.S.C. § 1291. Limited exceptions to this rule, however, permit review of certain interlocutory orders, including a district court's denial of motions to compel arbitration and to stay litigation under the FAA. See 9 U.S.C. § 16(a)(1)(A)-(B). Our jurisdiction to review those aspects of the district court’s order is thus plain. But Appellants ask us to review also the district court's determination that Duke has standing under Article III to seek relief on behalf of the Plan under Section 502(a)(2)—a determination of the district court's subject matter jurisdiction that is not ordinarily immediately appealable. Cf. Ashmore v. CGI Grp., Inc. , 860 F.3d 80, 85 (2d Cir. 2017). They argue that the FAA's grant of interlocutory appellate jurisdiction extends to this issue, as well.

In general, interlocutory appellate review is limited to the particular decision of the district court that forms the basis for immediate appeal. See Swint v. Chambers Cnty. Comm’n , 514 U.S. 35, 38 (1995). That requires we assess the scope of an “order” denying a motion to compel arbitration or for a stay. Cf. 9 U.SC. § 16(a)(1)(A)– (B). We hold today that such an order includes a district court's Page 10determination that it has subject matter jurisdiction over the controversy to be litigated rather than stayed or arbitratedincluding a plaintiff’s Article III standing.

Several of our precedents support this result. To begin, it is routine practice to review a district court’s exercise of subject matter jurisdiction on interlocutory appeal, as '[t]he existence of subject matter jurisdiction goes to the very power of the district court to issue the rulings now under consideration.' Merritt v. Shuttle, Inc. , 187 F.3d 263, 269 (2d Cir. 1999). Such is the case for interlocutory appeals of grants or denials of preliminary injunctions, San Filippo v. United Bhd. of Carpenters & Joiners of Am. , 525 F.2d 508, 512–13 (1975); of denials of sovereign and qualified immunity defenses, Merritt , 187 F.3d at 268– 69; In re Methyl Tertiary Butyl Ether ('MTBE') Prods. Liability Litig. , 488 F.3d 112, 121–24 (2d Cir. 2007); and of adjudications of civil contempt, U.S. Cath. Conf. v. Abortion Rights Mobilization, Inc. , 487 U.S. 72, 76 (1998).

We discern no reason that FAA appeals should work any differently, especially because 'a district court must determine if there exists a case or controversy in order for it to exercise its jurisdiction over [a] motion to compel [arbitration].” Doe v. Trump Corp. , 6 F.4th 400, 416 (2d Cir. 2021) (quoting Klay v. United Healthgroup, Inc. , 376 F.3d 1092, 1110 n.19 (11th Cir. 2004)). The same is true for a district court’s denial of a motion for a stay of litigation, which is necessarily premised upon its having jurisdiction to preside over the litigation in the first place. Indeed, we have before reviewed a district court's exercise of subject matter jurisdiction in a Section 16(a)(1) appeal of the denial of a motion for an FAA stay, though Page 11concededly without stopping to ask whether such an approach comported with Swint . See Adams v. Suozzi , 433 F.3d 220, 223–26 (2d Cir. 2005).⁵

The crux of Duke’s response is that standing is different. We are unpersuaded. A plaintiff's standing, just like the existence of diversity among the parties or a federal-law issue, bears directly on the district court’s subject matter jurisdiction. That is because “Article III . . . limits the subject-matter jurisdiction of the federal courts to ‘Cases’ and ‘Controversies.’” SM Kids, LLC v. Google LLC , 963 F.3d 206, 211 (2d Cir. 2020). No principled reason exists for treating these two limitations on a district court's power to entertain an action differently in the context of an interlocutory appeal. A defect in either would have required the district court to dismiss the action, and thusPage 12 “we have an obligation to determine whether the district court has subject matter jurisdiction to go forward.' MTBE , 488 F.3d at 124.

Finally, were we unsure whether a plaintiff's standing is always reviewable on a Section 16(a)(1) interlocutory appeal, we would nevertheless hold in this case that such review is appropriate because it concerns an issue 'inextricably intertwined' with an appealable order. Cf. Swint , 514 U.S. at 51. We sometimes refer to this as the doctrine of pendent appellate jurisdiction. See Freeman v. Complex Computing Co., Inc. , 119 F.3d 1044, 1049–50 (2d Cir. 1997). We have thus already suggested that, in an interlocutory FAA appeal, we may review a decision that falls outside of Section 16(a)(1) so long it is “inextricably intertwined” with a decision that falls within Section 16(a)(1). See Milligan v. CCC Info. Servs. Inc. , 920 F.3d 146, 152 n.5 (2d Cir. 2019). Though the exercise of pendent appellate jurisdiction is discretionary and reserved for “exceptional circumstances,” Atlantica Holdings v. Sovereign Wealth Fund Samruk-Kazyna JSC , 813 F.3d 98, 117 (2d Cir. 2016) (quotation marks omitted), it is warranted here. Duke’s standing to seek Section 502(a)(2) remedies bears directly on the arbitrability of her claim under that provision. This is because the district court based its denial of the motion to compel arbitration on the effective vindication doctrine, which precludes enforcing arbitration clauses that “operate as a prospective waiver of a party’s right to pursue statutory remedies .” Am. Exp. Co. v. Ital. Colors Rest. , 570 U.S. 228, 235 (2013) (cleaned up and emphasis altered). To determine whether the district court properly applied that doctrine— as we will have to in reviewing its interlocutory decision denying the motion to compel-we must ask which statutory remedies Duke Page 13could hope to pursue in federal court. As her Article III standing is central to that inquiry, it is “inextricably intertwined”—even more so than in the typical case-with the district court's immediately appealable order denying the motion to compel arbitration. Cf. MTBE , 488 F.3d at 123.

Assured that our jurisdiction permits review of Duke’s standing to seek Section 502(a)(2) remedies on behalf of the Plan, we turn next to the requirements of Article III.

As we have already intimated, Article III “limits the jurisdiction of federal courts to 'Cases' and 'Controversies,'' and by extension requires a plaintiff to satisfy “the irreducible constitutional minimum of standing[.]” Lujan v. Defs. of Wildlife , 504 U.S. 555, 559-60 (1992). Accordingly, a 'plaintiff must have (1) suffered an injury in fact, (2) that is fairly traceable to the challenged conduct of the defendant, and (3) that is likely to be redressed by a favorable judicial decision.” Spokeo, Inc. v. Robbins , 578 U.S. 330, 338 (2016). Though a plaintiff’s claimed injury must be redressable, a plaintiff need not state a meritorious or even plausible claim for relief under existing law in order to have standing to pursue a claim. See Soule v. Conn. Ass’n of Schools, Inc. , 90 F.4th 34, 45 (2d Cir. 2023). Indeed, unless a requested form of relief that would redress a plaintiff’s injury “is so insubstantial, implausible, foreclosed by prior decisions . . . , or otherwise completely devoid of merit as not to involve a federal controversy,” Steel Co. v. Citizens for a Better Env. , 523 U.S. 83, 89 (1998) (quotation marks omitted), that it may be legally unavailable is irrelevant for assessing a plaintiff’s Article III standing, Soule , 90 F.4th Page 14at 51. That said, “standing is not dispensed in gross; rather, plaintiffs must demonstrate standing for each claim that they press and for each form of relief that they seek (for example, injunctive relief and damages).” TransUnion LLC v. Ramirez , 594 U.S. 413, 431 (2021).

The Supreme Court distilled the application of these requirements to ERISA actions in Thole . There, two vested participants in a retirement plan sued the plan's fiduciaries under Sections 502(a)(2) and (a)(3), alleging mismanagement and seeking repayment to the plan, injunctive relief, and removal of the fiduciaries. 590 U.S. at 540–41. Like Duke, the Thole plaintiffs were participants in a defined benefit plan, meaning their legal entitlement to monthly benefits did not vary based on the plan’s performance or assets; indeed, neither plaintiff alleged that he had received a dollar less than he was owed. See id. at 540. The Supreme Court, applying traditional Article III principles, held that the plaintiffs lacked standing to represent the plan, as they suffered no injury that would be redressed by any form of relief they sought on behalf of the plan. See id. at 541. The Court rejected various theories of trust-specific standing, holding instead that an ERISA plaintiff-just like any other—must stand to personally benefit from the litigation in order to have standing. See id. at 542–43. The Court left open, however, the possibility of standing for plaintiffs who allege mismanagement that 'substantially increase[s] the risk that the plan and the employer [will] fail and be unable to pay the participants’ future . . . benefits,” thereby generating a redressable injury. See id. at 546. But the Thole plaintiffs made no such allegation, and so they faced no credible chance of future injury. Id. Nor did they possess a credible chance at Page 15a future benefit, since any surplus in a defined benefit plan’s assets return to the employer rather than the participants. See id. at 543. Without any hope of financial gain from a successful lawsuit on behalf of the plan, the plaintiffs lacked Article III standing to represent it. Id. at 547.

Armed with these principles, Appellants argue that Duke lacks standing to pursue any remedy on behalf of the plan under Section 502(a)(2). We agree in part.

First, Appellants argue that Duke lacks standing to pursue plan reformation under Section 502(a)(2). They do not contest, nor could they, that Duke’s receipt of decreased benefits constitutes a “classic pocketbook injury” cognizable under Article III. See Tyler v. Hennepin County , 598 U.S. 631, 636 (2023); see also Thole , 590 U.S. at 542. Appellants also acknowledge that this injury is at least plausibly caused by the Committee's use of allegedly outdated actuarial assumptions, and that it would be remedied by an order requiring the Committee to update those assumptions. See Appellants' Br. 24 (“[S]he can seek to change the terms of the Plan and order Defendants to pay Plaintiff higher benefits in accordance with those changed terms.”). Instead, Appellants argue that such a remedy is categorically unavailable under Section 502(a)(2)—which authorizes relief only to a plan—and thus Duke’s injury is not redressable under that provision. But this argument targets the merits of Duke’s claims, not her standing to pursue them. Without deciding whether the reformation Duke seeks is an available remedy under SectionPage 16 502(a)(2), we hold that Duke has standing to seek plan reformation under the provision.

Appellants are generally correct that Section 502(a)(2) authorizes relief to a plan, rather than to participants themselves. See L.I. Head Start Child Dev. Servs., Inc. v. Econ. Opportunity Comm'n of Nassau Cnty., Inc. , 710 F.3d 57, 65–66 (2d Cir. 2013). That limitation flows from the text of ERISA Section 409—incorporated into Section 502(a)(2)—which imposes personal liability on fiduciaries to restore 'to the plan' losses caused by and profits made from breaches of fiduciary duty. See 29 U.S.C. § 1109(a). And though the same provision also authorizes 'other equitable or remedial relief as the court may deem appropriate,” id. , the Supreme Court soon interpreted that phrase to require the relief sought “protect the entire plan, rather than . . . the rights of an individual beneficiary,' Mass. Mut. Life Ins. Co. v. Russell , 473 U.S. 134, 141 (1985). The Supreme Court has since walked back the “entire plan” requirement, permitting Section 502(a)(2) claims that are likely to benefit even a single participant, so long as the relief sought would remedy a “plan injur[y],' rather than a purely 'individual injur[y].' See LaRue v. DeWolff, Boberg & Assocs., Inc. , 552 U.S. 248, 256 (2008). But as we have explained, though LaRue clarified that the availability of Section 502(a)(2) relief does not turn on how widespread a plan injury is, it must nevertheless be to the plan itself . See Cedeno v. Sasson , 100 F.4th 386, 399 (2d Cir. 2024); see also Cooper v. Ruane Cunniff & Goldfarb Inc. , 990 F.3d 173, 180 (2d Cir. 2021). For relief from genuinely personal injuries, participants must instead turn to Section 502(a)(3), which authorizes individual equitable relief regardless of the whether the Page 17plan has also suffered. See Varity Corp. v. Howe , 516 U.S. 489, 515 (1996).

Appellants take these requirements to mean that Section 502(a)(2) offers Duke no remedy, as her Article III injury—reduced benefits—does not harm the Plan. But Duke does not contend that her receipt of reduced benefits harms the Plan. Instead, she argues that the Plan is harmed because its use of allegedly outdated actuarial assumptions renders the Plan in constant noncompliance with ERISA and jeopardizes its favorable tax status as a result.⁶ And though the reformation she seeks will allegedly increase her benefits—which is why she has Article III standing—“[i]t is of no moment that recovery inuring to the Plan may ultimately benefit particular participants.” L.I. Head Start , 710 F.3d at 66. Nor does it matter that 'a desire to ensure a defendant’s compliance with regulatory law is an insufficient injury for Article III standing,' Appellants' Br. 32 (quotation marks omitted), because the Plan’s alleged noncompliance is its own injury that Duke seeks to remedy with Section 502(a)(2), rather than her receipt of decreased benefits, which is sufficient for standing, see Thole , 590 U.S. at 542.

Page 18Stepping back, whether ERISA noncompliance and attendant tax consequences really do constitute “plan injuries” within Section 502(a)(2)’s remedial scope is an undecided question properly reserved for the merits. We know this in part because Appellants muster no authority foreclosing remedying plan-compliance injuries of this sort under Section 502(a)(2). Instead, Appellants lament that permitting such a remedy 'would remove any limit on the relief available under this part of ERISA's carefully crafted enforcement provision.” Reply Br. 14. Maybe, but that does not render Duke’s position “so insubstantial, implausible, foreclosed by prior decisions . . . , or otherwise completely devoid of merit as not to involve a federal controversy.” Cf. Steel Co. , 523 U.S. at 89 (quotation marks omitted). Instead, this back-and-forth demonstrates merely that both parties have arguments to make about “the legal availability' of Section 502(a)(2) relief in this case-a dispute that “goes to the merits, not jurisdiction.” Soule , 90 F.4th at 51. Today, we do not decide whether Duke has adequately alleged a Plan injury that falls within the remedial scope of Section 502(a)(2). We hold only that she has Article III standing to try.

Appellants argue next that, whether or not Duke has standing to seek reformation of the Plan, she lacks standing to seek monetary payments to the Plan. Specifically, she seeks repayment of losses to the Plan and disgorgement of profits (which would also go to the Plan). Appellants argue that Duke does not have standing to seek those remedies because only the Plan would benefit from such relief, and Duke herself would not. They argue that Thole precludes Page 19participants from seeking general monetary recoveries on behalf of a defined benefit plan, so long as the participants have not plausibly alleged a substantial risk of plan and employer failure. Cf. 590 U.S. at 546. Here, we agree with Appellants.

Duke attempts to distinguish Thole along two lines. First, she argues that the case is different because, unlike her, the Thole plaintiffs had received all of their previous benefits. See 590 U.S. at 540. But the Supreme Court also explained that, because the plaintiffs were participants in a defined benefit plan, they possessed “no equitable or property interest” in the plan’s assets, and so monetary repayment to the plan would not benefit the plaintiffs personally. See id. at 543. And though Duke claims to have received decreased benefits in the past, her benefits were allegedly decreased not for a lack of Plan funds, but because of the Plan’s use of outdated actuarial assumptions. “Relief that does not remedy the injury suffered cannot bootstrap a plaintiff into federal court; that is the very essence of the redressability requirement.” Steel Co. , 523 U.S. at 107.

Second, Duke argues that the forms of relief she seeks will “work in tandem” by increasing Plan funding commensurate with the reformation she hopes to obtain. See Appellee’s Br. 35. But here again, her argument is foreclosed by Thole . Because Duke is a participant in a defined benefit plan, 'the employer . . . is on the hook for plan shortfalls.” Thole , 590 U.S. at 543. Likewise, “the employer, not plan participants, receives any surplus left over after all of the benefits are paid[.]” Id. So it may be that the forms of relief she seeks will work together, but nothing suggests monetary payments to the Plan will be necessary to effectuate any eventual reformation. In other words, if Page 20Duke is successful in seeking reformation, she will be made whole regardless of whether the Plan receives additional funds; and if Duke is unsuccessful in seeking reformation, she will not be made whole regardless of whether the Plan receives those funds. A “favorable decision” on this form of relief will thus not “relieve a discrete injury,” Larson v. Valente , 456 U.S. 228, 243 n.15 (1982), and therefore fails Article III's redressability requirement.⁷ We accordingly reverse the district court's determination that Duke has standing to pursue monetary remedies on behalf of the Plan.

Appellants' fallback position is that Duke's Section 502(a)(2) claim belongs in individual arbitration pursuant to the Dispute Resolution Agreement Duke signed. Duke responds that the effective vindication doctrine precludes mandatory individual arbitration of her Section 502(a)(2) claim, and even if it did not, the Agreement does not cover her ERISA claims. We agree with Duke’s first argument and do not reach her second.

The FAA provides that “a contract . . . to settle by arbitration a controversy thereafter arising out of such contract . . . shall be valid, irrevocable, and enforceable, save upon such grounds as exist at law or in equity for the revocation of any contract[.]' 9 U.S.C. § 2.

Page 21'Section 2 is a congressional declaration of a liberal federal policy favoring arbitration agreements[.]' Moses H. Cone Mem. Hosp. v. Mercury Constr. Corp. , 460 U.S. 1, 24 (1983). But it is not absolute. Instead, courts may, under the 'effective vindication exception' to Section 2, “invalidate, on public policy grounds, arbitration agreements that operate as a prospective waiver of a party’s right to pursue statutory remedies.” Am. Exp. , 570 U.S. at 235 (cleaned up). We have thus held that arbitration provisions requiring individual litigation of Section 502(a)(2) claims are unenforceable because they prospectively waive a plaintiff’s right under that provision to bring a representative action to secure remedies on behalf of an ERISA plan. See Cedeno , 100 F.4th at 400. This is so in part because Section 502(a)(2) actions must be brought in some form of representative capacity because the claim “is inherently representational.” Id. at 403; see also Coan v. Kaufman , 457 F.3d 250, 262 (2d Cir. 2006). To require such claims be brought solely in an individual capacity is to prohibit them altogether. See Cooper , 990 F.3d at 184. Our cases, especially Cedeno , have straightforward application to this case: Duke may not be compelled to individually arbitrate her Section 502(a)(2) claim on behalf of the Plan.

Appellants strain for ways around these cases. None succeed.

First, Appellants return to Article III standing to argue that Cedeno precludes Duke’s quest to remedy her supposedly “individual injuries” under Section 502(a)(2). Appellants’ Br. 42. Not so. Though we reaffirmed in Cedeno the rule that Section 502(a)(2) actions are available only to remedy plan injuries, here Duke has alleged one: systematic noncompliance with ERISA and follow-on tax Page 22consequences. Cedeno said nothing about whether that theory of plan injury is actionable or not under ERISA, and neither do we on this preliminary posture. Instead, the arbitration provision in that case was unenforceable because it would have, if enforced, deprived the plaintiff of even her 'right to pursue statutory remedies.' Cedeno , 100 F.4th at 401 (emphasis added) (quoting Mitsubishi Motors Corp. v. Soler Chrysler-Plymouth, Inc. , 473 U.S. 614, 637 n.19 (1985)). Because individual arbitration would 'materially interfere with [Duke's] ability to seek relief under” Section 502(a)(2), the effective vindication doctrine precludes its enforcement. Cf. State Farm Mut. Auto. Ins. Co. v. Tri-Borough NY Med. Prac. P.C. , 120 F.4th 59, 91 (2d Cir. 2024).

Next, Appellants suggest that Cedeno is different because the plaintiff in that case was a participant in a defined contribution plan, rather than defined benefit plan. According to Appellants, this distinction matters because the alleged fiduciary mismanagement in Cedeno would harm “both participants and the plan itself by ‘saddling the Plan with millions of dollars of debt to the substantial detriment of the Plan and its participants[.]'' Appellants' Br. 43 (alteration adopted). But again, Duke has alleged the same problem—that the Plan’s use of outdated actuarial assumptions harms the Plan (through systemic ERISA noncompliance and jeopardy of its favorable tax status) as well as participants (through underpayment of benefits). And Duke will not be able to remedy the Plan’s harm on her own, as only a representative action can resolve the allegedly detrimental effects of widespread violations of federal law. “It is of no moment that recovery inuring to the Plan may ultimately benefit particular participants.” L.I. Head Start , 710 F.3d at 66.

Page 23Finally, Appellants argue that reading Cedeno to protect Duke's statutory right to pursue a representative Section 502(a)(2) action would run afoul of Supreme Court cases invalidating state laws that provide “a free-floating right to proceed through collective action for its own sake[.]” Appellants’ Br. 46 (quoting Cedeno , 100 F.4th at 401). It is true that, as a general matter, the mere availability of a representative or class-action procedure is not a substantive right that a plaintiff may invoke to avoid individual arbitration. See Estle v. Int’l Bus. Machs. Corp. , 23 F.4th 210, 213-14 (2d Cir. 2022). Accordingly, even if a state purports to require genuinely individual claims be brought in a representative capacity, the Supreme Court has held that such a scheme is a procedural device overridden by the FAA’s policy favoring the enforcement of arbitration agreements. See, e.g. , Viking River Cruises, Inc. v. Moriana , 596 U.S. 639, 659–62 (2022). But as we explained in Cedeno , the Supreme Court in that case 'recognized a qualitative difference between waivers of collective-action procedures like class actions, and waivers that preclude a party from arbitrating in a representational capacity on behalf of a single absent principal [.]” 100 F.4th at 402 (citing Viking River , 596 U.S. at 656–58). Thus, Appellants' argument that Duke seeks to escape individual arbitration through the invocation of a representative procedure, like their other arguments, proceeds on the flawed assumption that Duke seeks a personal remedy under Section 502(a)(2). She does not. Instead, she seeks relief for an “absent principal,” Cedeno , 100 F.4th at 402, that 'may ultimately benefit' her, as well, L.I. Head Start , 710 F.3d at 66. Whether she succeeds, including whether the alleged systemic ERISA noncompliance and jeopardy to its favorable tax status are Page 24plan injuries that can be remedied through Section 502(a)(2), are merits questions beyond the scope of this appeal.

Because Appellants present no persuasive reason for distinguishing Cedeno , we hold that it precludes compelling Duke to individually arbitrate her claims under Section 502(a)(2). We do not reach the question whether the Section 502(a)(3) claim falls within the Agreement's arbitration provision, as the FAA removes from our appellate jurisdiction review of a district court’s interlocutory order compelling arbitration. See 9 U.S.C. § 16(b)(2).

Appellants' final challenge is to the district court's denial of their motion to stay litigation on Section 502(a)(2) pending the parties’ arbitration. The district court exercised its discretion to deny the motion, reasoning that Appellants had not demonstrated the extent of factual overlap between arbitrable and nonarbitrable claims or that substantial prejudice would result absent a stay. Appellants do not now contest these conclusions. Instead, they argue only that the district court was without discretion to deny the motion because the stay they sought was mandatory under Section 3 of the FAA. We disagree.

Section 3 of the FAA provides in relevant part: If any suit or proceeding be brought in any of the courts of the United States upon any issue referable to arbitration under an agreement in writing for such arbitration, the court in which such suit is pending, upon being satisfied that the issue involved in such suit or proceeding is referable to arbitration under such an

Page 25agreement, shall on application of one of the parties stay the trial of the action until such arbitration has been had in accordance with the terms of the agreement[.]

9 U.S.C. § 3.

Section 3 stays are mandatory, not discretionary. Smith v. Spizzirri , 601 U.S. 472, 478 (2024). But Section 3 does not extend to claims not subject to arbitration; whether a district court stays those is 'a matter of its discretion to control its docket.' Moses H. Cone , 460 U.S. at 20 n.23. That is so even for “claims arising out of the same series of events[.]' Chang v. Lin , 824 F.2d 219, 222 (2d Cir. 1987), overruled on other grounds , Rodriguez de Quijas v. Shearson/Am. Exp., Inc. , 490 U.S. 477 (1989). True enough, “stay orders are particularly appropriate if the arbitrable claims predominate the lawsuit and the nonarbitrable claims are of questionable merit.” Genesco, Inc. v. T. Kakiuchi & Co., Ltd. , 815 F.2d 840, 856 (2d Cir. 1987) (citing NPS Commc’ns v. Cont’l Grp., Inc. , 760 F.2d 463, 465 (2d Cir. 1985)). But weighing those considerations is still 'within the district court's discretion to control its docket.” Id.

For their part, Appellants offer McCowan v. Sears, Roebuck & Co. , which concerned consolidated actions asserting federal and state securities claims against a brokerage firm (Dean Witter) and a “controlling person” under Viriginia law (Sears). 908 F.2d 1099, 1100– 01 (2d Cir. 1990). Dean Witter and the plaintiffs had formed an arbitration agreement; Sears and the plaintiffs had not. Id. at 1105. After the federal claims were either referred to arbitration or dismissed, Dean Witter and Sears both moved for Section 3 stays of the remaining state law claims, arguing that they fell within the scope Page 26of the plaintiffs' arbitration agreement with Dean Witter and that Sears was a third-party beneficiary of that agreement. Id. at 1101-02. We held that Dean Witter enjoyed a right to a mandatory stay because the claims against it were within the scope of the parties’ agreement. Id. at 1107. But we explained that we did 'need not determine whether Sears also [had] such a right,” because “[t]he practical effect of the stay as to Dean Witter, an indispensable party . . . , [was] that the suit against Sears, which [was] wholly dependent on the claim against Dean Witter, [could not] proceed.” Id. at 1108.

Unlike Appellants, we do not read McCowan to compel a Section 3 stay any time arbitrable and nonarbitrable claims share issues of law or fact. For one thing, it was decided after Genesco and Chang , which the McCowan panel had no authority to overrule. For another, McCowan ’s holding stemmed from the fact that Dean Witter was an indispensable party in the litigation against Sears but also entitled to a mandatory stay of litigation. Id. at 1101. The litigation could thus “[not] proceed” because Dean Witter enjoyed a mandatory right to await the conclusion of arbitration before continuing, and it was indispensable to the litigation going forward. The result had nothing to do with the scope of Section 3. But even if it did, any lesson from that case is confined to its narrow context of a nonarbitrable claim that is entirely derivative of an arbitrable one and is stayed as a result. Whatever McCowan says about that situation, it would not mandate a stay here, as Duke's requested relief under Section 502(a)(2) is much broader than, and therefore not derivative of, her request under Section 502(a)(3).

Page 27Finally, Appellants ask us to overlook Chang and Genesco and rely instead on the word “issue” in Section 3 to hold that the provision mandates a stay any time a litigated claim shares a question of law or fact with a claim to be arbitrated. Even on its own terms, the textual argument faces problems. First, Section 3 says more than the word “issue”; it mandates a stay of an “issue referable to arbitration .” See 9 U.S.C. § 3 (emphasis added). In context, that plainly refers to the claims that the district court orders arbitrated, rather than any discrete legal or factual issues that may one day arise in arbitration. Second, as we have already explained, the issue referred to arbitration in this case was Duke’s individual entitlement to Section 502(a)(3) relief, not the distinct question whether the Plan suffered a qualifying injury redressable under Section 502(a)(2). So even if we could overrule our precedents—which we cannot, see Garcia Pinach v. Bondi , 147 F.4th 117, 129 (2d Cir. 2025)-we would not be inclined to adopt Appellants’ drastic reading of Section 3.

Because Appellants do not make any other argument that the district court abused its discretion, we affirm its denial of the stay motion.

The district court’s November 27, 2024 order is REVERSED as to Duke’s Article III standing to seek monetary payments on behalf of the Plan and AFFIRMED in all other respects.