The SEC filed suit on May 30, 2026 at 5:27 p.m. UTC against Nathan Fuller of Texas, alleging he defrauded roughly 150 investors out of $12.3 million by fabricating an AI-powered crypto arbitrage operation that never existed — and then used actual artificial intelligence to generate a fake audit letter when investors started demanding their money back.
The complaint, filed in the U.S. District Court for the Southern District of Texas, names Fuller's entities Privvy Investments LLC and Gateway Digital Investments as the vehicles for a scheme that ran from at least October 2022 through mid-2024. The case is documented in SEC litigation release lr-26558.
The pitch: AI bots, guaranteed returns, stop-loss protection
Fuller told investors he had built proprietary AI-based trading bots capable of scanning crypto markets for arbitrage opportunities, executing high-frequency trades, and capping losses through automated stop-loss coding. The promised returns were explicit: 40% to 50% within 30 to 45 days, and in some cases more than 100% in under a month.
The SEC says every material element of that pitch was false.
According to the complaint, only approximately $380,000 — roughly 3% of total investor funds — was actually used to buy cryptocurrency. No bots were involved in those trades. They generated no profits.
The remaining capital, per the SEC's allegations, went elsewhere entirely. Fuller allegedly diverted at least $6.2 million for personal use, including purchasing a home, gambling, travel, and vehicles. Another $5.5 million was used to make Ponzi-like payments to earlier investors — the accounting trick that kept the scheme alive while fresh capital was still coming in.
The cover-up: fabricated statements, then a fake audit letter written by AI
As investors grew concerned and began requesting withdrawals, Fuller allegedly created fabricated account statements showing positive returns and referenced fictitious entities to justify delays.
When that wasn't enough, he escalated. Fuller used artificial intelligence to generate a letter purportedly from an auditing firm, claiming investor accounts were under review and would eventually be liquidated into a trust. The SEC's complaint identifies this as a deliberate attempt to stall withdrawals using a document that had no legitimate origin.
The detail is not incidental. Most fraud cases involve a lie told at the pitch stage. This one involved AI twice: once to construct the narrative that drew investors in, and again to manufacture documentation designed to stop them from getting out. That's a meaningful escalation in the toolkit available to retail fraud operators, and it's the kind of fact that draws law enforcement attention.
DOJ bankruptcy proceeding sealed the record
The SEC action follows a parallel bankruptcy case in which the Justice Department said Fuller was denied discharge of more than $12.5 million in debt. In that proceeding, Fuller admitted to operating Privvy as a Ponzi scheme and acknowledged fabricating documentation. The DOJ cited those admissions in court records.
That record matters for enforcement purposes. Fuller's own admissions in bankruptcy court effectively corroborate the SEC's fraud allegations before any civil trial. It also means the known victim pool extends beyond the roughly 150 investors named in the SEC's complaint — the $12.5 million figure in the bankruptcy filing is slightly higher than the $12.3 million the SEC identifies as raised from investors.
What the SEC is seeking
The agency charged Fuller with violating registration and antifraud provisions of federal securities laws. It is seeking permanent injunctions, disgorgement of ill-gotten gains, civil penalties, and a ban on Fuller participating in any future securities offerings.
Those remedies are standard for an enforcement action of this type. The injunction and offering ban are the components with the broadest practical consequence: they would prevent Fuller from launching successor vehicles under different names.
The enforcement trend this fits
The Fuller case lands at a moment when U.S. regulators and prosecutors are building out AI-assisted crypto fraud as a defined category. The pattern — AI capabilities invoked in the marketing, then AI tools deployed in the cover-up — wasn't available to fraudsters running equivalent schemes five years ago.
Several earlier enforcement actions have targeted crypto "AI trading bot" claims: the FTC took action against a handful of bot-based schemes in 2023 and 2024, and the CFTC has made AI-fraud representations an explicit area of examination. What distinguishes Fuller's case is the documented second use of AI as a defensive instrument — generating the audit letter — rather than simply as a lure.
Whether the Fuller complaint becomes a template for how regulators characterize AI use in securities fraud prosecutions is a question worth watching. The SEC's complaint language around the AI-generated audit letter is the first instance this reporter has seen where a regulator explicitly pleads AI document generation as an element of the fraud, rather than as a background technological detail.
The case is United States v. Nathan Fuller, U.S. District Court for the Southern District of Texas. SEC litigation release lr-26558 is dated May 30, 2026.
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