Shares of GRAIL, Inc. (GRAL) experienced a significant downturn on Thursday, plummeting 5.62% during intraday trading. The sharp decline came as the company announced its filing for a mixed shelf offering, as revealed in a SEC filing.

According to the filing, GRAIL has not disclosed the size of the mixed shelf, which typically allows a company to issue various types of securities, including common stock, preferred stock, debt securities, or warrants. This move often indicates a company's intention to raise capital in the near future, which can lead to concerns among existing shareholders about potential dilution of their holdings.

The market's negative reaction to this news underscores investors' wariness about the potential impact on share value. The lack of clarity regarding the size of the shelf offering may have added to the uncertainty, prompting some investors to sell their positions. As GRAIL moves forward with this financial maneuver, market participants will likely be closely watching for further details about the company's capital raising plans and how they might affect the stock's future performance.