Jonathan E. Lim - 15 Jul 2021 Form 3 Insider Report for Erasca, Inc. (ERAS)

Footnote F1

Includes 1,644,532 shares subject to repurchase by us, which are subject to vesting.

Footnote F2

The securities reported herein may be deemed beneficially owned by each of (i) Jonathan E. Lim, M.D. and (ii) Conyee T. Lim, M.D., who are co-trustees of the Jonathan E. Lim and Conyee T. Lim Family Trust, dated April 28, 2005.

Footnote F3

Consists of shares held directly by City Hill, LLC ("City Hill"). Jonathan E. Lim, M.D. serves as the managing partner of City Hill. Dr. Lim exercises voting and dispositive control over the securities held by City Hill and is therefore deemed to be a beneficial owner of such securities. Dr. Lim disclaims beneficial ownership of the reported securities held by City Hill, except to the extent of his pecuniary interest therein.

Footnote F4

The shares of Series A Preferred Stock are convertible, at any time, at the holder's election, to shares of the Issuer's common stock at a ratio of 1.2-for-1. In addition, effective immediately prior to the closing of the Issuer's initial public offering of its common stock, each share of Series A Preferred Stock will automatically convert to shares of the Issuer's common stock at a ratio of 1.2-for-1. The Series A Preferred Stock has no expiration date.

Footnote F5

The shares of Series B Preferred Stock are convertible, at any time, at the holder's election, to shares of the Issuer's common stock at a ratio of 1.2-for-1. In addition, effective immediately prior to the closing of the Issuer's initial public offering of its common stock, each share of Series B Preferred Stock will automatically convert to shares of the Issuer's common stock at a ratio of 1.2-for-1. The Series B Preferred Stock has no expiration date.