Pro Rata Side Letter (Canada) by Y Combinator

Updated 4 October 2025

The Pro Rata Agreement gives investors the right to purchase their proportional share of preferred stock in a company’s future equity financing, ensuring they can maintain ownership when a post-money SAFE converts. It defines how the pro rata share is calculated, when the right terminates, and the rules for assignment or amendment. This agreement is part of the standard financing documents commonly used alongside Y Combinator’s post-money SAFE framework.

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Pro Rata Side Letter (Singapore) by Y Combinator

The Pro Rata Agreement gives investors the right to purchase their proportional share of equity in future financing rounds, ensuring they can maintain ownership when a SAFE converts. It defines the scope, termination triggers, and assignment rights tied to the investor’s post-money SAFE. This agreement is part of the trusted set of financing documents commonly used with Y Combinator’s SAFE framework.