Shares of The Metals Company (TMC) tumbled 7.73% in trading on Thursday, marking a significant 24-hour plunge for the deep-sea mining firm. The sharp decline comes on the heels of a notable insider transaction that has caught the attention of investors.

According to recent filings, TMC's Chief Financial Officer, Craig Shesky, executed a substantial sale of the company's stock. While the exact details of the transaction were not immediately available, insider sales of this magnitude often raise concerns among shareholders about the company's near-term prospects or valuation.

Insider transactions, particularly those involving high-ranking executives like the CFO, are closely monitored by market participants as they can provide insights into the company's internal perspective. The timing and size of Shesky's sale appear to have triggered a wave of selling pressure, contributing to the stock's steep decline. As The Metals Company continues to navigate the challenges of the deep-sea mining industry, investors will likely keep a close eye on further insider activity and company developments in the coming days.