A former foreign-exchange chief’s deferred-pay dispute has exposed a sharper problem for UBS: an ICC tribunal found that Credit Suisse’s own contracts did not permit the wipeout. UBS now wants a US judge to enforce the half of the award it won and erase the half it lost

In the legal wreckage left by Credit Suisse’s emergency rescue, one of the sharpest contractual findings against the Credit Suisse CCA write-down has come not from a bond fund but from a former banker seeking deferred pay. The sum is modest beside the CHF16.5bn erased from public AT1 investors. The finding is not: the contractual condition for writing down Matthew Mitchell’s three Contingent Capital Awards was not triggered.

That conclusion was reached on May 8 by Sherman W. Kahn, the sole arbitrator in an International Chamber of Commerce proceeding seated in New York. In the Partial Final Award, Kahn called the trigger question “a very close question”. He nevertheless ruled that the wording chosen by Credit Suisse — and governed by New York law — did not permit the bank to reduce Mitchell’s awards to zero.

Credit Suisse Securities (USA) LLC and UBS Group AG, as successor-in-interest to Credit Suisse Group AG, are now asking the US District Court for the Southern District of New York to undo that part of the decision. Their federal petition puts the position starkly: enforcing the CCA portion of the award would require them, they say, to disobey binding decrees issued by Switzerland’s financial regulator. The arbitrator’s answer was equally consequential: on his reading, FINMA required Credit Suisse to use whatever rights the CCA contracts supplied; it did not create a contractual trigger that had never occurred.

The banker and the awards

Court filings say Mitchell joined Credit Suisse Securities (USA), the group’s US broker-dealer, in 2016 as a managing director. Bloomberg Law has identified him as a former global co-head of foreign exchange and precious-metals trading. He was therefore not an AT1 bondholder. He was a senior employee whose compensation included instruments designed to imitate some of the loss-absorbing characteristics of AT1 debt.

The instruments were CCAs — deferred compensation awards whose eventual value depended on Credit Suisse and which could be written down if specified conditions were met. They were not publicly traded bonds. They were granted under the bank’s compensation plans and documented in individual CCA certificates. According to the arbitral award and the federal petition, CCAs represented less than 10 per cent of Mitchell’s compensation over the relevant period.

Mitchell received three awards. The 2020-1 CCA, issued on February 6, 2020, had a grant value of $429,250. The 2021-1 CCA, issued on February 11, 2021, was worth $442,000. The 2022-1 CCA, issued on February 2, 2022, was worth $43,200. Their combined grant value was $914,450. The three certificates were materially identical and chose New York law.

The distinction between CCAs and AT1 bonds matters. The employee awards were modelled on AT1 instruments and were exposed to similar crisis risks, but Mitchell’s claim arose from his employment and compensation contracts. His award does not reinstate a single public bond and does not bind the thousands of AT1 investors litigating in Switzerland and elsewhere, including in a separate treaty arbitration against the Swiss state. What it does is test the same underlying proposition: whether the conditions drafted into Credit Suisse’s instruments were actually satisfied in March 2023.

A retention payment, then an exit

The dispute also contains a second, less flattering pay fight. In 2022, as Credit Suisse struggled to retain senior staff, the bank granted Mitchell a $480,000 Upfront Cash Award, or UCA. The banks’ petition says Mitchell had sought the retention payment and then, shortly after receiving it, told his supervisors that he intended to leave for another firm.

Credit Suisse and Mitchell negotiated a mutual separation. The agreement allowed him to preserve much of the deferred and unvested compensation that he would ordinarily have forfeited on a voluntary departure, including the three CCAs. In exchange, he surrendered other awards and promised to repay a pro-rata portion of the $480,000 retention payment.

The arbitrator found that Mitchell did not make that repayment despite reminders and materially breached the separation agreement. That conclusion explains the apparently contradictory result: Mitchell won on the CCAs, while the banks won on the retention payment.

How FINMA swept employee pay into the AT1 wipeout

On March 19, 2023, Swiss authorities engineered UBS’s emergency acquisition of Credit Suisse. FINMA ordered Credit Suisse Group to write down its AT1 instruments to zero. The write-down erased approximately CHF16.5bn in nominal value while shareholders retained a reduced recovery through the UBS transaction.

Credit Suisse did not initially accept that the order also captured employee CCAs. Its position was that the awards had not been issued by Credit Suisse Group itself but granted by other group companies to their employees. The bank asked FINMA to reconsider. On March 22, the regulator issued a second order stating that the CCAs were included in the write-off — an episode antigua.news reported as evidence that Credit Suisse itself disputed the contractual basis for extending the March 19 action.

That history is awkward for the present litigation. On April 24, Credit Suisse applied to the Swiss Federal Administrative Court for precautionary measures against the March 22 CCA order. The court admitted the application on condition that the bank file a timely substantive appeal. On May 9, Credit Suisse informed the court that it had decided not to appeal and withdrew its request. The proceeding, B-2254/2023, was struck off, as the court’s official statement records. Credit Suisse then wrote Mitchell’s three CCAs down to zero in May 2023. Antigua.news later examined the abandoned challenge and the documents surrounding the March 22 order.

The decision not to pursue the Swiss appeal did not validate FINMA’s view. It left that view untested on the merits. That distinction now sits at the heart of UBS’s US argument: an administrative instruction that Credit Suisse first disputed, but ultimately allowed to stand, is presented as a binding rule that a New York arbitral award cannot lawfully contradict.

What the arbitrator decided on the CCA trigger

After mediation failed, Mitchell commenced ICC arbitration on May 29, 2025. The parties exchanged documents and extensive written submissions. They agreed to replace an evidentiary hearing with oral argument, which took place in New York on March 16, 2026.

Kahn’s May 8 award separated three questions that UBS’s federal petition tends to compress into one: what Mitchell’s contracts permitted, what FINMA’s decrees required, and whether those decrees made payment illegal or impossible.

On the first — and most important — question, the arbitrator found that the contractual write-down condition had not occurred. The CCA certificates tied the trigger to capital adequacy. On Kahn’s reading of their plain language, the circumstances of the rescue did not establish the capital-adequacy condition the contracts demanded. The finding was not that Credit Suisse was healthy, or that public authorities lacked reason to intervene. It was narrower and more damaging: crisis alone was insufficient because the contract required a particular crisis trigger.

The distinction mirrors the central fault line in the wider AT1 litigation — liquidity versus capital. In October 2025, the Swiss Federal Administrative Court issued a partial decision revoking FINMA’s March 19 AT1 decree. It held that Credit Suisse remained sufficiently capitalised and that the federal and central-bank measures addressed liquidity rather than the bank’s equity base. The court has not yet decided reversal or other remedies; FINMA appealed, and the ruling is not final. Kahn’s private award does not bind the Swiss courts, but its conclusion points in the same direction: the language of the instruments matters even in an emergency. Antigua.news has analysed the Swiss ruling and its limits, while the court’s official release sets out the legal holdings.

Kahn also rejected the banks’ defences of illegality and impossibility. The banks now dispute that reading. The arbitrator understood FINMA’s decrees as requiring Credit Suisse to exhaust the contractual options available under the CCA certificates, rather than as an independent command to cancel compensation even if the contractual conditions were absent. If the contract supplied no right to write down, the regulator’s instruction did not rewrite it.

The arbitrator ordered Credit Suisse Securities and UBS to pay Mitchell $1,060,130.81 for the three CCAs, including pre-award interest. In the same decision, he ordered Mitchell to pay the banks $557,498.08 for the unpaid UCA amount, also including pre-award interest after a June 3 correction. A final decision on arbitration costs followed on July 17.

UBS asks a judge to split the award

On August 6, Credit Suisse Securities and UBS filed a 14-page petition in Manhattan federal court, with the award and other exhibits attached. They do not ask the court to discard the entire award. They ask it to split the decision exactly along the line that benefits them.

First, they want the court to vacate the $1.06mn CCA award to Mitchell. They argue that payment would compel them to violate Swiss law, offend US public policy and reflect a manifest disregard of the law. They also say the arbitrator exceeded his authority by requiring conduct prohibited by FINMA. Their petition describes the result as an “impossible choice”: disobey the regulator or disobey the award.

Second, the banks want the court to confirm the $557,498 award against Mitchell. That part, they say, presents none of the public-policy problems they attach to their own payment obligation. They also seek post-award interest, judgment costs and other relief. Put plainly, UBS says the arbitrator was beyond his powers when he ruled against the bank, but fully enforceable when he ruled against its former employee.

Federal review of arbitral awards is narrow. UBS invokes Section 10 of the Federal Arbitration Act to vacate the CCA portion and Section 207 to confirm the UCA portion. Its petition argues that the public-policy and illegality questions permit the court to review the arbitrator’s construction of the Swiss decrees afresh. That is UBS’s legal theory; it is not yet a ruling.

The case is Credit Suisse Securities (USA) LLC and UBS Group AG v Matthew Mitchell, No. 1:26-cv-06729. Mitchell has appeared through counsel, but no merits response was publicly available at the time of publication. The public docket lists Judge Naomi Reice Buchwald and a September 1 deadline for a proposed briefing schedule.

Why a $1mn award could matter to a $16.5bn dispute

The direct economics are limited. Mitchell’s award is microscopic beside the public AT1 wipeout and the roughly CHF360mn of CCAs reported as outstanding at Credit Suisse at the end of 2022. But the legal architecture is shared. Both fights ask whether an official declaration of emergency can substitute for the contractual event that investors or employees agreed would absorb their money.

UBS disclosed in the petition that four former Credit Suisse executives brought similar arbitrations. A different arbitrator reached the opposite conclusion in Adam Gishen’s case, accepted that FINMA’s decrees prohibited payment and awarded UBS nearly $400,000 in fees and costs. UBS has asked a Delaware federal court to confirm that award. At the time UBS filed the Mitchell petition, no US confirmation or vacatur proceedings were pending in the other two arbitrations. The split shows why this case matters: tribunals examining related instruments and the same regulatory intervention are not speaking with one voice.

UBS also invokes the US Court of Appeals for the Second Circuit’s July 2026 decision in Creditincome, which treated FINMA’s mandatory directives as an exercise of sovereign authority while affirming dismissal of a bondholder suit against Switzerland on immunity grounds. But Creditincome did not decide that the contractual trigger occurred. It did not determine whether the write-down was lawful. It decided that Switzerland could not be sued in that US action under the commercial-activity exception to sovereign immunity.

The sharper comparison lies in Switzerland. The Federal Administrative Court has already held that the main AT1 write-down lacked both a satisfied contractual trigger and a sufficient legal basis, although appeals remain pending before the Federal Supreme Court. Credit Suisse’s separate challenge to the CCA order was never decided because the bank abandoned it.

That leaves Judge Buchwald with a dispute that is formally about one former banker’s compensation but structurally about something larger. UBS wants a US court to treat FINMA’s March 2023 command as legally decisive. Mitchell has an arbitral award saying Credit Suisse’s contract never gave the bank the right to erase his money in the first place. The rescue may have been politically unavoidable. The question now is whether it was contractually self-executing. In Mitchell’s case, one arbitrator has answered no.