Dolca Thomas - 11 Aug 2023 Form 4 Insider Report for CHINOOK THERAPEUTICS, INC.

Footnote F1

The reported securities were disposed of pursuant to the Merger Agreement (defined in the Remarks below). Upon effectiveness of the Merger (defined in the Remarks below), in exchange for each share of the Issuer's Common Stock, the reporting person received: (i) $40.00 in cash, without interest and less applicable withholding taxes; and (ii) one contractual contingent value right (each, a "CVR"), entitling the reporting person to additional cash payments upon the achievement of certain future business milestones pursuant to the Contingent Value Rights Agreement (the "Contingent Value Rights Agreement") entered into concurrent with completion of the Merger.

Footnote F2

This stock option award, which provided for ratable vesting in 36 monthly installments beginning on November 6, 2020, became fully vested and was canceled upon effectiveness of the Merger, and was converted into the right to receive, with respect to each share of the Issuer's Common Stock underlying such option, (i) a cash payment representing the excess, if any, of the per share merger consideration ($40.00 per share) over the per share exercise price for such option, without interest, and (ii) one CVR, entitling the reporting person to additional cash payments upon the achievement of certain future business milestones pursuant to the Contingent Value Rights Agreement entered into concurrent with the completion of the Merger, in each case subject to applicable withholding taxes.

Footnote F3

This stock option award, which vested in full upon the earlier of the one year anniversary of the grant date or the date of the Issuer's next annual stockholders' meeting, was canceled upon effectiveness of the Merger, and was converted into the right to receive, with respect to each share of the Issuer's Common Stock underlying such option, (i) a cash payment representing the excess, if any, of the per share merger consideration ($40.00 per share) over the per share exercise price for such option, without interest, and (ii) one CVR, entitling the reporting person to additional cash payments upon the achievement of certain future business milestones pursuant to the Contingent Value Rights Agreement entered into concurrent with the completion of the Merger, in each case subject to applicable withholding taxes.