A warrant is a contractual right to buy a company’s shares at a fixed price (the strike or exercise price) within a defined period. It resembles an employee stock option but is granted to investors, lenders or partners rather than to staff. Warrants rarely stand alone; they are usually attached to another instrument as an extra incentive, most commonly to venture debt (a lender takes warrants alongside interest), to bridge financings, or occasionally to commercial or partnership deals as an equity kicker.
The economics are described by warrant coverage: the value of shares the warrants can buy, expressed as a percentage of the associated loan or investment. Coverage of 10% on a $2,000,000 loan means warrants over $200,000 of stock. The strike is often set at the most recent round’s price, so the warrant holder profits if the company’s value rises above that level before the warrants expire. Until exercised, warrants sit as potential shares; exercised, they convert to real equity and dilute existing holders.
For founders the key discipline is to count warrants where they belong, in the fully diluted capitalization, and to track how they accumulate. Venture debt and bridges are useful tools for a capital-intensive deeptech company stretching runway to the next milestone, but each debt-flavoured instrument tends to carry warrant coverage, and several of them across a long roadmap add up to meaningful dilution that is easy to overlook because it is not a priced equity round. Negotiating coverage down, capping it, or trimming the warrant term are all levers; ignoring warrants until they are exercised is how a founder is surprised by the fully diluted number at the next round.