Jerel Davis - 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

These securities are held of record by Versant Venture Capital VII, L.P. ("Versant VII"). Versant Ventures VII GP, L.P. ("Versant Ventures VII GP") is the general partner of Versant VII, and Versant Ventures VII GP-GP, LLC ("Versant Ventures VII GP-GP") is the general partner of Versant Ventures VII GP. Jerel C. Davis is a member of the Issuer's board of directors and is a managing director of Versant Ventures VII GP-GP and may be deemed to share voting and dispositive power over the shares held by Versant VII. Each of Jerel C. Davis, Versant Ventures VII GP-GP, and Versant Ventures VII GP disclaims beneficial ownership of the shares held by Versant VII, except to the extent of their respective pecuniary interests therein.

Footnote F3

These securities are held of record by Versant Voyageurs I, L.P. ("Versant Voyageurs I"). Versant Voyageurs I GP Company is the general partner of Versant Voyageurs I. Jerel C. Davis is a member of the Issuer's board of directors and is a director of Versant Voyageurs I GP Company and may be deemed to share voting and dispositive power over the shares held by Versant Voyageurs I. Each of Jerel C. Davis and Versant Voyageurs I GP Company disclaims beneficial ownership of the shares held by Versant Voyageurs I, except to the extent of their respective pecuniary interests therein.

Footnote F4

These securities are held of record by Versant Voyageurs I Parallel, L.P. ("Versant I Parallel"). Versant Voyageurs I GP, L.P. ("Versant Voyageurs I GP") is the general partner of Versant I Parallel. Versant Ventures VI GP, L.P. ("Versant Ventures VI GP") is the general partner of Versant Voyageurs I GP. Versant Ventures VI GP-GP, LLC ("Versant Ventures VI GP-GP") is the general partner of Versant Ventures VI GP. Jerel C. Davis is a member of the Issuer's board of directors and is a managing director of Versant Ventures VI GP-GP and may be deemed to share voting and dispositive power over the shares held by Versant I Parallel. Each of Jerel C. Davis, Versant Ventures VI GP-GP, Versant Ventures VI GP, and Versant Voyageurs I GP disclaims beneficial ownership of the shares held by Versant I Parallel, except to the extent of their respective pecuniary interests therein.

Footnote F5

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 F6

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.