X0306 4 2021-02-22 0 0001451809 SITIME Corp SITM 0001514114 Pangrazio Vincent P C/O SITIME CORPORATION 5451 PATRICK HENRY DR. SANTA CLARA CA 95054 0 1 0 0 See Remarks Common Stock 2021-02-22 4 S 0 224 115 D 107870 D Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of previously awarded RSUs. This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary trade by the reporting person. Includes an aggregate of 106,500 shares of common stock issuable pursuant to previously reported restricted stock units that have not vested. EVP, Chief Legal Officer & Corporate Secretary Samsheer Ahamad, Attorney-in-fact 2021-02-24