Shares of Oklo Inc. (OKLO) tumbled 5.82% in pre-market trading on Monday, following the company's announcement of a significant financial move. The clean energy technology firm filed for a mixed shelf offering of up to $1 billion with the Securities and Exchange Commission (SEC), sparking concerns among investors about potential share dilution.

A mixed shelf offering allows a company to issue various types of securities, including common stock, preferred stock, debt securities, or warrants, in one or more separate offerings over time. While this provides Oklo with flexibility in raising capital, it has immediately impacted the stock price as investors react to the potential increase in the number of outstanding shares.

The substantial size of the offering, at up to $1 billion, suggests that Oklo may be preparing for significant expansion or capital-intensive projects. However, the market's initial reaction reflects concerns about the offering's potential to dilute existing shareholders' stakes. As trading progresses, investors will likely be watching closely for more details on how Oklo plans to use the funds raised through this offering and whether the capital raise will translate into long-term value for shareholders.