New York-based law firm Pomerantz LLP has launched an investigation against Bitcoin mining company Core Scientific over claims that its leadership had been involved in securities fraud and activities that negatively affected its stock price.

In a press release Monday, Pomerantz said it is acting on behalf of the firm’s investors concerned that “Core and certain of its officers and/or directors have engaged in securities fraud or other unlawful business practices.”

More specifically, the securities class firm cited last year’s report by investment research firm Culper Research, which said that Core had “wildly oversold both its mining and hosting businesses,” allegedly cobbling it together “in a series of questionable transactions before dumping onto the market via SPAC.”

The Austin-based company went public on the Nasdaq via a special purpose acquisition vehicle, or SPAC, in January 2022. By the end of December, when Core filed for Chapter 11 bankruptcy, the firm’s stock had plummeted by more than 98%.