Pump.fun

Solana

United

motion

Jito

A US court is once again being asked to weigh in on maximal extractable value (MEV) practices after a judge allowed new evidence to be added to a class-action lawsuit tied to a memecoin platform.
The judge granted a motion to amend and refile a class-action lawsuit to include new evidence against memecoin launch platform Pump.fun, MEV infrastructure firm Jito Labs, Solana Labs, the Solana Foundation and others.
The <a href="https://x.com/BurwickLaw/status/2000635043421835390" rel="noopener noreferrer nofollow" target="_blank">motion</a> said over 5,000 pieces of evidence in the form of internal chat logs were submitted by a “confidential informant” in September that were previously unavailable. The filing said:
<blockquote>
 “Plaintiffs assert that the logs contain contemporaneous discussions among Pump.fun, Solana Labs, Jito Labs, and others concerning the alleged scheme, and that they materially clarify the enterprise's management, coordination, and communications.”
</blockquote>
<figure>
 <img alt="Solana" src="https://s3.cointelegraph.com/uploads/2025-12/019b31b1-5810-7f3c-80b8-09a662b5c47f.png" title="">
 <figcaption style="text-align: center;">
 The first page of the motion to amend the case to include new evidence, which was granted. Source: <a href="https://x.com/BurwickLaw/status/2000635043421835390" rel="noopener noreferrer nofollow" target="_blank">Burwick Law</a>
 </figcaption>
</figure>
The lawsuit, originally <a href="https://cdn.prod.website-files.com/681b670bc176d6cc4203cdf0/68813e81635e9c3128ed11b4_34%20-%2007232025%20-%20Pump%20Amended%20Complaint%20-%20Aguilar%20v%20Baton%20%281%29.pdf" rel="noopener noreferrer nofollow" target="_blank">filed</a> in July, alleges that the Pump.fun platform <a href="https://cointelegraph.com/news/pump-fun-lawsuit-slot-machine-rico" rel="noopener noreferrer nofollow">deliberately misled retail investors</a> by marketing memecoin launches as “fair,” but engaged in a scheme with Solana validators to <a href="https://cointelegraph.com/explained/what-is-front-running-in-crypto-and-nft-trading" rel="noopener noreferrer nofollow">front-run retail participants</a> through maximal extractable value (MEV).
<a href="https://cointelegraph.com/learn/articles/what-is-mev-ethereums-invisible-tax" rel="noopener noreferrer nofollow">Maximal extractable value</a> is a technique that involves reordering transactions within a block to maximize profit for MEV arbitrageurs and validators.&nbsp;
The plaintiffs allege that Pump.fun used MEV techniques to give insiders preferential access to new tokens at a low value, which were then pumped and dumped onto retail participants, who were used as exit liquidity by insiders.
Cointelegraph reached out to Burwick Law, the legal firm representing the plaintiffs, as well as Pump.fun, Jito Labs and the Solana Foundation, but did not receive any responses by the time of publication.
<figure>
 <img alt="Solana" src="https://s3.cointelegraph.com/uploads/2025-12/019b326b-11c6-7944-8ce6-989e13348edc.png" title="">
 <figcaption style="text-align: center;">
 The allegations in the original lawsuit filing. Source: <a href="https://x.com/BurwickLaw/status/2000635043421835390" rel="noopener noreferrer nofollow" target="_blank">Burwick Law</a> 
 </figcaption>
</figure>
The lawsuit could set a precedent for MEV cases in the United States, as the ethics of the practice continue to be debated within the crypto industry and legal bodies struggle to define proper regulations about the highly technical subject.
Related: <a href="https://cointelegraph.com/news/pump-fun-cofounder-denies-436m-cash-out-treasury-management" rel="noopener noreferrer nofollow">Pump.fun co-founder denies $436M cash out, claims it was ‘treasury management’</a>
<h2 id="the-mev-bot-trial-leaves-questions-unanswered">The MEV bot trial leaves questions unanswered</h2>
Anton and James Peraire-Bueno, the brothers accused of using a MEV trading bot to make millions of dollars in profit, <a href="https://cointelegraph.com/news/mev-bot-exploit-trial-industry-impact" rel="noopener noreferrer nofollow">went to trial in November</a> in the US.
Prosecutors argued that the brothers tricked victims out of their funds, but defense attorneys said that they were executing a legitimate trading strategy and did not do anything illegal.
The jury <a href="https://cointelegraph.com/news/jury-mev-bot-trial-verdict-struggles" rel="noopener noreferrer nofollow">struggled to reach a verdict</a> in the case, and several jurors requested additional information to clarify the complexities surrounding the technical specifics of blockchain technology.
The case <a href="https://cointelegraph.com/news/mev-bot-trial-ends-in-mistrial-after-jury-deadlock-on-brothers-verdict" rel="noopener noreferrer nofollow">ended in a mistrial</a> after the jury was deadlocked and failed to reach a verdict, highlighting the complexity of adjudicating legal disputes surrounding the application of nascent financial technology. Magazine: <a href="https://cointelegraph.com/magazine/meet-crypto-sleuths-fighting-crime-better-than-the-cops/" rel="noopener noreferrer nofollow">Meet the onchain crypto detectives fighting crime better than the cops</a>

MEV trading returns to court in Pump.fun class-action lawsuit

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