AE OPCO III, LLC v. AAR CORP.

Court of Appeals for the Eleventh Circuit·Decided April 15, 2026·No. 25-11348·Published

Opinion

FOR PUBLICATION

In the

United States Court of Appeals For the Eleventh Circuit

No. 25-11348

In re: AE OPCO III, LLC., Debtor.

AE OPCO III, LLC, AE HOLDCO III, INC., Plaintiffs-Appellees-Cross Appellants, versus

AAR CORP., Defendant-Appellant-Cross Appellee.

Appeals from the United States Bankruptcy Court for the Middle District of Florida D.C. Docket No. 8:22-bk-01186-CPM

Before NEWSOM, LAGOA, and KIDD, Circuit Judges. NEWSOM, Circuit Judge:

USCA11 Case: 25-11348 Document: 53-1 Date Filed: 04/15/2026 Page: 2 of 30

2 Opinion of the Court 25-11348

This thorny bankruptcy cross-appeal defies easy introduction , but here goes: Together, AE OpCo, the debtor, and AAR, one of its creditors, present several issues concerning the bankruptcy court’s treatment of three of AAR’s claims.1 The claims arise out of AE OpCo’s rejection of a procurement contract with another bankruptcy creditor, Short Brothers. That rejection potentially left AAR on the hook for aspects of AE OpCo’s breach. Accordingly, pursuant to a pre-bankruptcy agreement with AE OpCo, AAR filed the three claims relevant here: one for indemnification pegged to what AAR might owe Short Brothers pending resolution of their dispute in a suit overseas (we’ll call it the “indemnification claim”), one for the attorneys’ fees that AAR incurred while contesting Short Brothers’s collection efforts (the “defense-costs claim”), and one for the attorneys’ fees that AAR incurred in the bankruptcy proceeding itself (the “bankruptcy-costs claim”).

Citing 11 U.S.C. § 502(e)(1)(B), the bankruptcy court disallowed AAR’s indemnification claim as a contingent claim for reimbursement —with our emphasis to highlight the point of contention —made by “an entity that is liable with the debtor.” The court next allowed AAR’s defense-costs claim as a fixed, non-contingent claim outside § 502(e)(1)(B)’s ambit. And finally, reading a negative implication into § 502(b)’s general allowance provision, the court

1 AE HoldCo III, AE OpCo’s parent, is also listed as an appellee/cross-appel-

lant. As AE OpCo was the debtor and AE HoldCo makes no distinct claims of its own, we’ll refer to AE OpCo in the singular for the sake of convenience.

25-11348 Opinion of the Court 3

disallowed AAR’s bankruptcy-costs claim as a post-petition unsecured claim for attorneys’ fees.

Before us, AAR appeals the disallowed claims and AE OpCo, the allowed claim. With the benefit of extensive briefing and oral argument, we affirm the bankruptcy court’s disallowance of the indemnification claim and its allowance of the defense-costs claim, but we reverse that court’s disallowance of the bankruptcy-costs claim and remand for further proceedings consistent with this opinion .

I

A

This case arises out of a triangular arrangement that AE OpCo, AAR, and Short Brothers formed well before the bankruptcy . In 2009, AAR and Short Brothers executed an agreement that we’ll call the “Procurement Contract.” AAR’s manufacturing subsidiary agreed to make airline parts for Short Brothers, and in return Short Brothers agreed to pay AAR’s manufacturing sub a specified price. Importantly here, AAR agreed to guarantee its sub’s performance in the event of default.

More than a decade later in 2020, Architect Equity, a privateequity fund that owns AE OpCo, saw some value in AAR’s composite -materials operation—even after accounting for the by-then-unfavorable Procurement Contract. Architect arranged for AE OpCo to pay AAR $1.5 million for the business, which included AAR’s $6 million manufacturing facility—but also its associated liabilities, including , as relevant here, the duty to perform on the Short Brothers

4 Opinion of the Court 25-11348

Procurement Contract. Short Brothers was initially skeptical about swapping counterparties, as it had no experience working with Architect . But once AE OpCo and AAR consummated their own deal, memorialized in what we’ll call the “Asset Purchase Agreement ,” the three reached a compromise that exists at the center of this case. In short, AAR reassured Short Brothers by agreeing to guarantee AE OpCo’s performance on the Procurement Contract. In return, AE OpCo agreed to indemnify AAR in the event that AE OpCo defaulted on its performance to Short Brothers. Going forward , we’ll call this aspect of the Asset Purchase Agreement the “Indemnification Agreement.” To the extent it’s helpful, here’s a visual demonstrative of the parties’ relationship:

Short Brothers

Indemnification Agreement

AE OpCo AAR

Importantly, under this tripartite arrangement, both AE OpCo and AAR were potentially liable to Short Brothers: AE OpCo, directly, if it failed to perform its obligations under the Procurement Contract; and AAR, indirectly, through its guaranty of AE OpCo’s performance. The Indemnification Agreement between AE Opco and AAR contained several provisions relevant for our purposes:

25-11348 Opinion of the Court 5

• The operative provision: “[AE Opco] shall indemnify and hold harmless [AAR] . . . against and in respect of any and all Losses actually sustained, incurred or suffered by the Seller Parties, to the extent resulting or arising from” the Procurement Contract. Asset Purchase Agreement § 8.2(b), Dkt. No. 408-2 (emphasis added). • The definition of “Losses”: “any and all losses, claims, damages, liabilities, fines, reasonable costs and expenses, including reasonable legal fees and expenses.” Id. § 8.2(a). • A do-no-harm exception: “[T]he Indemnifying Party will have no liability in respect of any such Losses . . . if they would not have arisen but for any voluntary act, omission , transaction or arrangement carried out after Closing by the Indemnified Party . . . other than in the ordinary course of the Business as carried on at the Closing Date.” Id. § 8.5(c). • A mitigation exception: “The parties shall take . . . all reasonable steps to mitigate any Loss upon becoming aware of any event that would reasonably be expected to, or does, give rise thereto, including incurring costs only to the minimum extent necessary to remedy a breach that gives rise to the Loss.” Id.

6 Opinion of the Court 25-11348

• A choice-of-law clause specifying that the contract would be governed by Delaware law. Id. § 9.11

B

In 2022, AE OpCo declared bankruptcy. Exercising one of its rights as debtor-in-possession, AE OpCo moved to “reject” (i.e., get out of) the Procurement Contract with Short Brothers. Short Brothers and AAR thereafter submitted claims in bankruptcy for breach of contract and indemnification, respectively. While Short Brothers showed a willingness to engage in negotiations to avoid wholesale rejection, AAR sat out, professing a desire to “stay[] out of the way.”

The AE OpCo–Short Brothers renegotiation bore fruit, in the form of what we’ll call “the Settlement,” which they submitted to the bankruptcy court and which it promptly approved. The Settlement , like the underlying Asset Purchase Agreement between AE OpCo and AAR, is governed by Delaware law. Pursuant to the Settlement, Short Brothers purchased the assets and inventory necessary to produce its own parts. AE OpCo’s parent Architect also gave some consideration to both Short Brothers and the estate. More importantly for our purposes, Short Brothers substituted its proof of claim with a new one reflecting the insourcing costs and, more importantly still, executed a covenant not to sue AE OpCo. In relevant part, that covenant provided as follows:

Subject to and from and after the Effective Date, each Protected Party hereby covenants not to bring any action of any nature against any other Protected Party

25-11348 Opinion of the Court 7

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