NextFin News - A federal judge in Manhattan has dealt an early setback to Susquehanna International Group's insider-trading lawsuit, refusing to keep the alleged traders' brokerage accounts frozen and signaling skepticism that the market-making firm has proved its case. US District Judge Arun Subramanian said Susquehanna had not presented sufficient evidence to justify extending the freeze while the case moves forward, noting that the firm had not identified a single alleged "tipper" who passed on inside information and that other explanations for the trades appeared plausible. The ruling does not dismiss the lawsuit, but it narrows the leverage Susquehanna held over roughly 100 unnamed defendants it accuses of exploiting advance knowledge of China's May 2026 crackdown on cross-border brokerages to pocket more than $100 million.
The Case in Brief
The dispute began on June 29, when two Susquehanna units filed suit in the Southern District of New York against "John Does 1 Through 100," acknowledging it did not know who made the trades but arguing that only insider trading could explain the pattern. The firm said the defendants spent about $12 million on short-dated put options in the two weeks before Beijing's May 22 announcement, generating illicit profits of at least $100 million, and that Susquehanna, as the counterparty on many of the trades, lost more than $70 million.
The trades were concentrated and, on their face, striking. According to the complaint, the defendants bought roughly 200,000 short-dated put options in Futu Holdings and Up Fintech Holding, better known as Tiger Brokers, in the days before Chinese regulators announced penalties against the two firms. In one example cited in the filing, a Futu put option was purchased when the stock traded at $124.58 for the right to sell at $102.45 until May 29 — cheap because it was out of the money and near expiration, and profitable only if the holder knew the stock was about to fall.
In July, Judge Subramanian granted Susquehanna's request for a temporary restraining order, freezing accounts at Futu, Up Fintech's TradeUp Securities unit, and Interactive Brokers Group, and allowing the firm to subpoena the brokers for the account holders' identities. That freeze was the plaintiffs' main source of leverage — the only way to pressure unidentified defendants into settlement or disclosure. On Tuesday, the judge declined to extend that leverage, a move that shifts the practical balance of the case back toward the defendants.
The core tension is now on the table: Susquehanna's case rests almost entirely on the timing and size of the options bets — a classic "suspicious trading" theory — while the judge has flagged the missing link in any insider-trading claim: who told them, and how do you know they knew?
The Evidentiary Gap: No Tipper, No Smoking Gun
Insider trading liability requires more than well-timed trades. To win, Susquehanna must ultimately show that the defendants traded on material nonpublic information — which means proving a chain: someone with access to the information passed it to the traders, and the traders used it. The judge's two observations cut at the weakest joints of that chain. First, no alleged tipper has been identified — no regulatory staffer, no brokerage employee, no intermediary. Second, the judge said there appeared to be other possible explanations for the trades, which is a judicial way of saying the circumstantial case is not yet exclusive of innocent explanations.
"Susquehanna hadn't put forth sufficient evidence to justify extending a freeze on the accounts while the case proceeds," the judge said, pointing to the absence of an identified tipper and the existence of alternative explanations for the trading.
This is the classic problem with John Doe securities suits built on market data alone. Options chains are transparent; traders' identities, inside brokerage accounts, are not. A firm can see that someone bought $12 million of out-of-the-money puts right before a stock fell, but the ledger does not say why. The inference of insider trading is strong when the trade is wildly out of character, concentrated, and perfectly timed — and Susquehanna's filing argued exactly that, noting the purchases accounted for most of the trading in those options during the period. But an inference is not proof, and a pretrial freeze is an extraordinary remedy that courts grant only when the plaintiff shows a real risk the money will vanish.
The legal bar for a prejudgment asset freeze is deliberately high. In the Second Circuit, courts review a freeze for abuse of discretion and require a showing that the assets are tainted by the alleged wrongdoing and that the plaintiff is likely to succeed on the merits. A judge who is not yet convinced there is a tipper is a judge who is not yet convinced there is taint. Tuesday's order is not a final ruling on the merits, but it is the clearest signal yet that the court is not prepared to treat suspicious timing as established fraud.
Why the Freeze Mattered — and What Its Loss Means
A preliminary freeze is not a judgment on the merits, but in a case against unknown defendants it is functionally the whole ballgame. Named defendants with lawyers and assets in the jurisdiction can be sued to judgment and collected from. John Doe defendants sitting behind accounts at Chinese-facing brokerages can simply wait the case out — unless their money is locked up. With the freeze lifted, the practical pressure on the account holders drops sharply.
The ruling also narrows the path to discovery. Susquehanna's stated theory was that the alleged insiders were likely tipped off by Chinese regulatory staff or workers at Futu or Up Fintech. But without a freeze to compel cooperation, and with the defendants' identities still partially shielded behind brokerage privacy and cross-border enforcement gaps, the firm's ability to build the tipper chain it needs is now more constrained, not less.
There is also a timing problem the plaintiffs cannot wish away. The CSRC's crackdown was announced publicly on May 22 by eight departments, including the securities regulator, the central bank, and the public security ministry — and the details had been telegraphed for months. An implementation plan for a comprehensive rectification of illegal cross-border securities business had been issued on May 9, and a prior round of enforcement against the same brokers dated to December 2022. A trader did not need a tip inside a regulator's office to know that cross-border brokerages were under pressure; they needed only to read the news. That does not prove these trades were innocent. But it is precisely the kind of "other possible explanation" the judge flagged, and it gives the defendants a narrative that does not require a crime.
The Second-Order Question: Recovery Vehicle or Flare for Prosecutors?
Susquehanna framed its suit as one of the largest insider-trading schemes in recent memory, explicitly comparing it to Raj Rajaratnam's Galleon scheme, which yielded about $53 million. That framing is strategic: it invites regulators to take over. The Justice Department and the Securities and Exchange Commission are already looking into the trades, and a criminal or enforcement action would carry subpoena powers and investigative tools a private plaintiff lacks. For Susquehanna and Citadel Securities — which intervened saying it lost about $28 million and put the total illicit profits closer to $137 million — the private suit may be less a recovery vehicle than a flare shot into the sky for prosecutors.
Here lies the uncomfortable arithmetic. Even if Susquehanna ultimately proves its case, recovery is far from certain. The statute it sued under caps and offsets private recovery; the likely defendants sit in jurisdictions that do not reliably enforce U.S. judgments; and the money moved through brokerage platforms whose own legal exposure creates competing claims on the same frozen pool. Citadel already flagged this: it asked to join the suit partly because any recovery by Susquehanna, including from frozen funds, could shrink what is left to compensate Citadel's own losses. Two victims, one pot of money, and a judge now less willing to hold it still.
The market-making business model sharpens the point. Susquehanna is not a hedge fund that picked the wrong direction; it is a counterparty that stood on the other side of the options and lost when the bets paid out. Its equity positions, per its own SEC filings, have run above $890 billion, and the firm has made co-founder Jeff Yass one of the world's richest people. A $70 million loss is real money, but it is also a rounding error against a balance sheet of that size — which raises the question of whether the lawsuit's true purpose is compensation or deterrence. If it is deterrence, the audience is not the John Does; it is the regulators watching the docket.
That deterrence logic has a cross-border edge. The alleged traders are believed to be reachable, if at all, through platforms serving mainland Chinese clients — the very firms the CSRC is now punishing. Beijing's crackdown carries combined fines of about RMB 2.26 billion against Futu, Tiger Brokers, and Longbridge, and a two-year phaseout that leaves mainland accounts able to withdraw but not deposit. A Chinese court is unlikely to enforce a U.S. insider-trading judgment born of a case that implicitly questions the adequacy of Chinese market oversight. The money, in other words, may be legally owed and practically unreachable at the same time.
The Counter-Thesis: Skepticism Now Does Not Mean Dismissal Later
The strongest argument against reading too much into Tuesday's order is procedural: this was a ruling on a preliminary freeze, not on the merits of the insider-trading claim. Courts set a high bar for pretrial asset restraints precisely because they can cripple a defendant before liability is established. Judge Subramanian's doubts about the evidence are real, but they are also early — discovery has barely begun, and the plaintiffs may yet produce account records, communications, or trading histories that close the tipper gap.
That counter-argument has force. Suspicious-trading cases often turn on records that only emerge after subpoenas bite. And the pattern Susquehanna described — 200,000 short-dated puts, concentrated in the two weeks before a regulatory announcement, in stocks directly targeted by that announcement — is not easily explained by coincidence alone. The concentration of the buying, the out-of-the-money strike selection, and the proximity to expiration are the hallmarks of informed trading, and no amount of public-news availability fully explains why these particular accounts placed these particular bets in this particular window.
But the counter-argument also concedes the point that matters: Susquehanna does not yet have the evidence, and it just lost the tool most likely to force it out of reluctant, possibly overseas, hands. If the firm cannot identify a tipper through the broker records it already has the right to subpoena, the case risks becoming a well-documented suspicion that never ripens into a provable claim.
The falsifying signal is concrete: if Susquehanna's subpoenas to Futu, TradeUp, and Interactive Brokers produce communications or account records linking specific traders to Chinese regulatory staff or brokerage employees before the May 22 announcement, the judge's skepticism will have been premature. If, after those records are reviewed, no tipper emerges, the suit's foundation — that only insider trading can explain the bets — will have failed its first real test.
Outlook: What to Watch
In the short term, the ruling is a procedural loss with practical teeth: the freeze is lifted, the defendants' money is mobile again, and Susquehanna's leverage is diminished. In the medium term, the case turns on what the broker subpoenas reveal — and on whether the Justice Department or the SEC decides to bring its own action, which would change the evidentiary calculus entirely. In the long term, the dispute is a test of how far U.S. courts will let market makers go in using civil suits to police trading they believe is informed, especially when the alleged traders are anonymous and the information source sits in another jurisdiction.
Base case: the private suit limps forward on discovery, with recovery uncertain and any payout split between Susquehanna and Citadel. Upside case for the plaintiffs: the subpoenas name a tipper, regulators step in, and the scheme becomes a prosecutable cross-border insider-trading case. Downside case: without a tipper, the John Doe theory stalls, the freeze stays lifted, and the $70 million-plus loss is absorbed as a cost of making markets in volatile, regulation-sensitive names.
What to watch: the content of the broker responses to Susquehanna's subpoenas; any filing by the Justice Department or SEC; and whether Citadel's intervention survives the weakened freeze. The single most telling data point will be whether a named tipper appears in the next round of court filings.
The market can price a well-timed bet; a courtroom still needs a name.
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