OpenAI Fires an Employee For Prediction Market Insider Trading

Source: Slashdot

Background

OpenAI terminated an employee after an internal investigation revealed that the individual used confidential OpenAI information on external prediction‑market platforms, including Polymarket. The termination was disclosed by Fidji Simo, OpenAI’s CEO of Applications, in an internal message to staff earlier this year. OpenAI’s policy prohibits employees from leveraging confidential information for personal gain, including participation in prediction markets. The company has not disclosed the employee’s identity or the specifics of the trades.

Investigation Findings

Polymarket operates on the Polygon blockchain, making its trading ledger pseudonymous but traceable. Analysis by the financial‑data platform Unusual Whales identified clusters of activity that the service flagged as suspicious around OpenAI‑related events dating back to March 2023.

• Scope of flagged activity: 77 positions across 60 wallet addresses were marked as potential insider trades.
• Criteria considered: account age, trading history, and the significance of the investment.
• Key events targeted: product releases such as Sora, GPT‑5, the ChatGPT Browser, and changes in CEO Sam Altman’s employment status.

In November 2023, two days after Altman’s abrupt removal from OpenAI, a newly created wallet placed a large bet that he would return, netting over $16,000 in profit. That wallet made no further bets thereafter.

Insider‑Trading Patterns

The clustering of fresh wallets placing identical bets shortly before major OpenAI announcements suggests coordinated insider activity.

“The tell is the clustering. In the 40 hours before OpenAI launched its browser, 13 brand‑new wallets with zero trading history appeared on the site for the first time to collectively bet $309,486 on the right outcome,”
— Matt Saincome, CEO of Unusual Whales

“When you see that many fresh wallets making the same bet at the same time, it raises a real question about whether the secret is getting out.”

Outlook

Although this is the first confirmed case of a major technology company firing an employee over prediction‑market trades, it is likely not an isolated incident. Opportunities for tech‑sector employees to profit from insider information on such markets appear to be widespread, and ongoing data analysis suggests similar activity is occurring across the industry.