What an extension round is, how it differs from a bridge, when to price it at the previous round's terms, and how it signals to your next institutional lead.
An extension round is additional capital added to the previous priced round at the same terms — often triggered by new strategic investors or existing investors wanting more allocation. Unlike a bridge, an extension is offensive, not defensive.
An extension is a friendly top-up at the last round's price, usually because demand exceeded original allocation or a strategic wants in. A bridge is capital between priced rounds. Extensions signal strength; bridges signal a gap.
A strategic corporate investor wants in after your Series A closed. An existing investor increased their fund size and wants more allocation. A new customer partnership requires an equity component. All valid triggers for an extension.
Same price, preferred class, and terms as the original round. No new negotiation, no anti-dilution ratchet, no new liquidation preferences. Clean documents keep the extension light and fast to close.
Extensions typically sit at 20–40% of the original round size. Beyond that, most investors will push you to price a new round rather than extend — the argument is that meaningful new capital deserves updated terms.
Cleanest within 6 months of the original close. After 9–12 months, most leads will argue that the company's situation has changed enough to justify a new price. If you're extending 12+ months later, you're really pricing a new round.
Positive. Extensions are read as demand exceeding supply. The narrative is 'the round was oversubscribed and we let strategics in.' That's a strong story for the Series B.
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