Pro-Rata Rights
The contractual right for an existing investor to invest in future rounds to maintain their ownership percentage.
Pro-rata rights let an investor participate in a company's next financing round in proportion to their existing ownership stake, so a 5% shareholder can invest enough new money to still own roughly 5% after the round closes, rather than being diluted down by new investors alone.
These rights are typically granted through an investor rights agreement in a priced round, or via a side letter attached to a SAFE, and they usually apply only to 'major investors' who cleared a minimum check-size threshold. They don't guarantee allocation if a round is oversubscribed — companies can still choose to limit or waive pro-rata for existing investors when demand is high.
For funds, pro-rata rights are core to the strategy of doubling down on winners: a seed fund that can't exercise pro-rata into a hot Series A misses out on concentrating capital in its best-performing companies, which is often where fund returns actually come from.
Founders should decide up front how much pro-rata to honor in an oversubscribed round — reserving space for existing investors who added real value preserves relationships, but honoring every SAFE holder's pro-rata can crowd out the new lead investor you actually need.
Do all investors automatically get pro-rata rights?
No — they're usually reserved for investors above a minimum check size ('major investors') and must be explicitly granted in the financing documents or a side letter.
Related terms
Run the numbers yourself: dilution, SAFE conversion, and fund-returner calculators.