Fluence Energy, Inc. (FLNC) saw its shares plummet 8.84% in pre-market trading on Tuesday.

The sharp decline followed the company's filing for a mixed shelf offering, as disclosed in a regulatory filing. The size of the offering was not disclosed, which may have contributed to investor uncertainty.

Shelf offerings allow companies to issue securities such as shares over time, potentially diluting existing shareholders and often leading to negative market reactions.