What are warrants?
Cfefinances
A warrant is a security that gives the holder the right, but not the obligation, to buy a company's stock at a fixed price — known as the exercise price — before an expiration date. Warrants are similar to call options but are issued directly by the company.
Think about a company-issued security giving the right to buy its stock at a fixed price before expiration. They're like call options but come straight from the company.