Nvidia–Groq deal meets resistance from two fronts: DOJ investigation and shareholder lawsuit
Two former employees allege that Groq's board failed its shareholders when the company licensed its chip architecture to Nvidia. The Delaware lawsuit lands on top of an ongoing Department of Justice antitrust investigation — two legal fronts aimed at the same deal.
The suit now filed
Benjamin Serebrin and Joshua Rubin, both former engineers and shareholders at the AI chip company Groq, have filed suit against the company's board in Delaware around October 3–4, 2026. That is according to Cryptobriefing (f709bd89).
The lawsuit alleges that the board breached its duty of loyalty to shareholders — the so-called fiduciary duty. Critics of the arrangement argue that the deal's structure favored insiders over holders of ordinary common stock. It is important to stress: these are allegations from a lawsuit, made in civil proceedings, and none of them has been proven. Neither Groq, the board, the Department of Justice, nor the plaintiffs' lawyers have commented on the suit in the available coverage.
The lawsuit is a new and independent attack on the same transaction already under federal scrutiny. That means Nvidia's biggest move in the AI chip market outside its own walls now faces pressure from two directions at once.
How the deal was built
In December 2025, Nvidia paid roughly $20 billion — not to acquire Groq, but to license the company's signature chip architecture and recruit its leadership, stopping just short of a full takeover (Business Insider, b32fc132).
According to Cryptobriefing's account of the transaction (f709bd89), the roughly $20 billion broke down as follows:
- About $17 billion came in cash as licensing fees.
- Around $3 billion came in the form of an equity pool in Nvidia. That equity was set aside for roughly 200 Groq engineers who moved over to Nvidia.
- In total, about 90 percent of Groq's employees ended up at Nvidia.
Founder Jonathan Ross and Sunny Madra followed over to Nvidia, while Simon Edwards took over as Groq's new CEO.
The period before the deal shows why the numbers stand out. In mid-2025, Groq raised $750 million in a funding round that valued the company at $6.9 billion — just months before the Nvidia deal, whose total value is, according to some sources, almost three times as high (f709bd89).
Why the structure triggers two different reactions
It is the structure of the deal — a license rather than an acquisition — that underlies both legal challenges, even though they point to different problems.
The antitrust front. In September 2026, the US Department of Justice opened an antitrust investigation into the transaction, according to Cryptobriefing (f709bd89). Investigators are examining whether the arrangement circumvented the notification requirements of the Hart-Scott-Rodino Act — the premerger notification regime that normally requires federal authorities to get the chance to review large mergers and acquisitions before they are completed.
There is, however, conflicting chronology in the coverage. Android Headlines via MSN, citing the New York Times, reports that the Justice Department launched the investigation shortly after the deal was announced in December, and that the department has sent Nvidia a formal request for information (33f460fc). Cryptobriefing dates the opening to September 2026. The two accounts may reflect different phases of the same investigation — for example, an initial review that became a formal investigation — but the available source material does not resolve the question.
According to the NYT report as relayed by Android Headlines, it is unlikely that the Justice Department will attempt to unwind the deal — the department is assessed as not coming to demand a reversal.
The shareholder front. The lawsuit from Serebrin and Rubin does not attack the deal's antitrust legitimacy, but the distribution of value. The core of the claim is that a deal that moved 90 percent of the workforce and the leadership team to the buyer — packaged as licensing — may have been of greater benefit to those who received Nvidia shares and to those negotiating on the insider side than to ordinary Groq shareholders (f709bd89). If the lawsuit gains traction, the court will face questions about whether the board obtained fair value in a transaction that was constructed not to be an acquisition — but in which most of the company's human capital nonetheless went over to the counterparty.
Nvidia's response — and what was left of Groq
Nvidia has defended the arrangement. A company spokesperson characterized the deal as "the American system working as designed" and emphasized that Groq "continues to be a separate and independent business" (Business Insider, b32fc132).
What remains of Groq is, in essence, a cloud business. According to Business Insider, the company has 13 data centers, plans to quadruple capacity next year, and 6 million developers and thousands of companies using the cloud service (b32fc132). But the valuation tells of a smaller business than the one that left the market in December: in the latest round, Groq was valued at $3.5 billion — roughly half the $6.9 billion from mid-2025 (f709bd89, b32fc132).
What remains open
Several substantial questions are unanswered in the available coverage:
How big is the deal, really? Cryptobriefing and Business Insider describe a total value of around $20 billion ($17 billion in cash, $3 billion in shares). Android Headlines, on the other hand, describes a "$17 billion deal" for a non-exclusive license, citing earlier reports of an acquisition of around $20 billion. The discrepancy may involve the cash component versus the total, or the exclusivity of the license — but the sources contradict each other, and it is unresolved.
How long has the investigation been running? September 2026 (Cryptobriefing) and "a short time after the December announcement" (NYT via Android Headlines) are very different starting points for when DOJ got underway.
How is the case documented? The details about the lawsuit come from Cryptobriefing's coverage of the court filing, not from the complaint itself, which is not publicly available in this source material. None of the parties — Groq, the board, DOJ, or the plaintiffs' attorney — has commented.
The precedent question. Regardless of outcome, the case tests a model that several large chip players may find tempting: pay billions for a license, recruit the key people, and don't call it an acquisition. If DOJ concludes that the structure circumvented Hart-Scott-Rodino, that model gets a clear boundary. If not, the industry has a new playbook. And if a Delaware court finds that the board failed to look after ordinary shareholders in such a structure, the same model gets a financial price tag. For now, both outcomes remain open.