A subsequent public offering (FPO), also known as a secondary offering, is an additional issue of shares following an initial public offering (IPO).
Companies usually announce open deals to increase equity or reduce debt.
The two main types of FPOs are dilutive, where new shares are added, and non-dilutive, where existing private shares are sold to the public.
Market offering (ATM) is a type of FPO by which a company can offer secondary public shares on any given day, usually based on the prevailing market price, to raise capital.