KOD

SEC source: 0001209191-21-022881 · doc4.xml · nonDerivative · entry 3

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,721

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F3 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $131.09 to $132.08, inclusive.

SEC source: 0001209191-21-022881 · doc4.xml · nonDerivative · entry 2

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 67,809

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $130.04 to $130.94, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in these footnotes.

SEC source: 0001209191-21-022881 · doc4.xml · nonDerivative · entry 1

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 69,793

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-21-020222 · doc4.xml · nonDerivative · entry 5

BORGESON JOHN A. · CIK 0001754045 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 165,899

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $131.405 to $131.79, inclusive.

SEC source: 0001209191-21-020222 · doc4.xml · nonDerivative · entry 4

BORGESON JOHN A. · CIK 0001754045 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 166,704

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F5 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $130.35 to $131.30, inclusive.

SEC source: 0001209191-21-020222 · doc4.xml · nonDerivative · entry 3

BORGESON JOHN A. · CIK 0001754045 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 167,959

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F4 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $129.30 to $130.30, inclusive.

SEC source: 0001209191-21-020222 · doc4.xml · nonDerivative · entry 2

BORGESON JOHN A. · CIK 0001754045 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 169,990

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F3 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $128.10 to $128.86, inclusive.

SEC source: 0001209191-21-020222 · doc4.xml · nonDerivative · entry 1

BORGESON JOHN A. · CIK 0001754045 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 170,599

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $126.73 to $127.34, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in these footnotes.

SEC source: 0001209191-21-018320 · doc4.xml · derivative · entry 2

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 277,825

Underlying: Common Stock · 12,500 shares

Expires 2028-08-29

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: Twenty-five percent of the shares subject to the option vested on September 1, 2019 and 1/48th of the shares subject to the option vest on the same day of each month thereafter.

SEC source: 0001209191-21-018320 · doc4.xml · nonDerivative · entry 1

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 62,843

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-21-013834 · doc4.xml · derivative · entry 8

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 290,325

Underlying: Common Stock · 6,950 shares

Expires 2028-08-29

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F8 · derivative.exercise_date: Twenty-five percent of the shares subject to the option vested on September 1, 2019 and 1/48th of the shares subject to the option vest on the same day of each month thereafter.

SEC source: 0001209191-21-013834 · doc4.xml · nonDerivative · entry 7

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 50,343

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F7 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $128.75 to $129.45, inclusive.

SEC source: 0001209191-21-013834 · doc4.xml · nonDerivative · entry 6

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 50,756

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $126.99 to $127.92, inclusive.

SEC source: 0001209191-21-013834 · doc4.xml · nonDerivative · entry 5

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 52,583

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F5 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $125.67 to $126.628, inclusive.

SEC source: 0001209191-21-013834 · doc4.xml · nonDerivative · entry 4

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 54,194

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F4 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $124.47 to $125.32, inclusive.

SEC source: 0001209191-21-013834 · doc4.xml · nonDerivative · entry 3

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 56,344

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F3 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $123.28 to $124.20, inclusive.

SEC source: 0001209191-21-013834 · doc4.xml · nonDerivative · entry 2

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 57,031

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $121.86 to $122.65, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in these footnotes.

SEC source: 0001209191-21-013834 · doc4.xml · nonDerivative · entry 1

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 57,293

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-21-004925 · doc4.xml · derivative · entry 10

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 297,275

Underlying: Common Stock · 26,950 shares

Expires 2028-08-29

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F10 · derivative.exercise_date: Twenty-five percent of the shares subject to the option vested on September 1, 2019 and 1/48th of the shares subject to the option vest on the same day of each month thereafter.

SEC source: 0001209191-21-004925 · doc4.xml · nonDerivative · entry 9

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 50,343

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $167.14 to $167.68, inclusive.

SEC source: 0001209191-21-004925 · doc4.xml · nonDerivative · entry 8

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,678

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F8 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $166.12 to $167.00, inclusive.

SEC source: 0001209191-21-004925 · doc4.xml · nonDerivative · entry 7

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 64,775

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F7 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $165.11 to $166.04, inclusive.

SEC source: 0001209191-21-004925 · doc4.xml · nonDerivative · entry 6

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 57,907

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $164.03 to $164.91, inclusive.

SEC source: 0001209191-21-004925 · doc4.xml · nonDerivative · entry 5

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 59,404

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F5 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $162.75 to $163.68, inclusive.

SEC source: 0001209191-21-004925 · doc4.xml · nonDerivative · entry 4

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 61,465

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F4 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $161.70 to $162.65, inclusive.

SEC source: 0001209191-21-004925 · doc4.xml · nonDerivative · entry 3

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 66,421

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F3 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $160.56 to $161.51, inclusive.

SEC source: 0001209191-21-004925 · doc4.xml · nonDerivative · entry 2

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 70,625

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $159.51 to $160.45, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in these footnotes.

SEC source: 0001209191-21-004925 · doc4.xml · nonDerivative · entry 1

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 77,293

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-20-065054 · doc4.xml · derivative · entry 14

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 324,225

Underlying: Common Stock · 7,500 shares

Expires 2028-08-29

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F11 · derivative.exercise_date: Twenty-five percent of the shares subject to the option vested on September 1, 2019 and 1/48th of the shares subject to the option vest on the same day of each month thereafter.

SEC source: 0001209191-20-065054 · doc4.xml · nonDerivative · entry 12

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 50,343

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-20-065054 · doc4.xml · derivative · entry 13

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 331,725

Underlying: Common Stock · 6,950 shares

Expires 2028-08-29

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F11 · derivative.exercise_date: Twenty-five percent of the shares subject to the option vested on September 1, 2019 and 1/48th of the shares subject to the option vest on the same day of each month thereafter.

SEC source: 0001209191-20-065054 · doc4.xml · nonDerivative · entry 11

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,843

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

SEC source: 0001209191-20-065054 · doc4.xml · nonDerivative · entry 10

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,925

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F10 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $148.17 to $148.39, inclusive.

SEC source: 0001209191-20-065054 · doc4.xml · nonDerivative · entry 9

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,224

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F9 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $147.02 to $147.68, inclusive.

SEC source: 0001209191-20-065054 · doc4.xml · nonDerivative · entry 8

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 44,320

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F8 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $146.13 to $146.95, inclusive.

SEC source: 0001209191-20-065054 · doc4.xml · nonDerivative · entry 7

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,754

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F7 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $145.25 to $146.00, inclusive.

SEC source: 0001209191-20-065054 · doc4.xml · nonDerivative · entry 6

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 46,563

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $144.00 to $145.00, inclusive.

SEC source: 0001209191-20-065054 · doc4.xml · nonDerivative · entry 5

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 46,971

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F5 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $142.96 to $143.92, inclusive.

SEC source: 0001209191-20-065054 · doc4.xml · nonDerivative · entry 4

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 47,527

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F4 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $141.73 to $142.58, inclusive.

SEC source: 0001209191-20-065054 · doc4.xml · nonDerivative · entry 3

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,390

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F3 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $140.41 to $141.14, inclusive.

SEC source: 0001209191-20-065054 · doc4.xml · nonDerivative · entry 2

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 49,406

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F2 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $139.26 to $139.73, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the Staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in these footnotes.

SEC source: 0001209191-20-065054 · doc4.xml · nonDerivative · entry 1

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 49,793

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001638599-20-000917 · doc4_6926.xml · nonDerivative · entry 2

BAKER BROS. ADVISORS LP · CIK 0001263508 · Director · 10% owner

667, L.P. · CIK 0001551139 · Director · 10% owner

Baker Bros. Advisors (GP) LLC · CIK 0001580575 · Director · 10% owner

Baker Brothers Life Sciences LP · CIK 0001363364 · Director · 10% owner

BAKER FELIX · CIK 0001087940 · Director · 10% owner

BAKER JULIAN · CIK 0001087939 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 12,736,556

F1 · ownership.nature: 667, L.P. ("667") and Baker Brothers Life Sciences, L.P. ("Life Sciences", and together with 667, the "Funds") purchased 116,158 and 1,411,619 shares of common stock ("Common Stock"), respectively, of Kodiak Sciences Inc. (the "Issuer") for $108.00 per share in an underwritten public offering (the "Offering") that closed on November 20, 2020.

F3 · ownership.nature: After giving effect to the transaction reported herein and as a result of their ownership interest in (i) Baker Brothers Life Sciences Capital L.P. and (ii) Life Sciences, Felix J. Baker and Julian C. Baker may be deemed to have an indirect pecuniary interest in Common Stock reported in column 5 of Table I beneficially owned by Life Sciences, a limited partnership of which the sole general partner is Baker Brothers Life Sciences Capital, L.P., a limited partnership of which the sole general partner is Baker Brothers Life Sciences Capital (GP), LLC, due to their interest in Life Sciences and Baker Brothers Life Sciences Capital, L.P.'s right to receive an allocation of a portion of the profits from Life Sciences.

F4 · ownership.nature: Baker Bros. Advisors LP (the "Adviser") serves as the investment adviser to the Funds. In connection with the services provided by the Adviser, the Adviser receives an asset-based management fee that does not confer any pecuniary interest in the securities held by the Funds. Baker Bros. Advisors (GP) LLC (the "Adviser GP") is the Adviser's sole general partner. Julian C. Baker and Felix J. Baker are managing members of the Adviser GP. The Adviser has complete and unlimited discretion and authority with respect to the investment and voting power of the securities held by the Funds. The general partners of the Funds relinquished to the Adviser all discretion and authority with respect to the investment and voting power of the securities held by the Funds.

F5 · ownership.nature: Julian C. Baker, Felix J. Baker, the Adviser GP and the Adviser disclaim beneficial ownership of the securities held directly by the Funds except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that any of Julian C. Baker, Felix J. Baker, the Adviser GP or the Adviser is a beneficial owner of such securities for purposes of Section 16 or any other purpose.

SEC source: 0001638599-20-000917 · doc4_6926.xml · nonDerivative · entry 1

BAKER BROS. ADVISORS LP · CIK 0001263508 · Director · 10% owner

667, L.P. · CIK 0001551139 · Director · 10% owner

Baker Bros. Advisors (GP) LLC · CIK 0001580575 · Director · 10% owner

Baker Brothers Life Sciences LP · CIK 0001363364 · Director · 10% owner

BAKER FELIX · CIK 0001087940 · Director · 10% owner

BAKER JULIAN · CIK 0001087939 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 1,143,396

F1 · ownership.nature: 667, L.P. ("667") and Baker Brothers Life Sciences, L.P. ("Life Sciences", and together with 667, the "Funds") purchased 116,158 and 1,411,619 shares of common stock ("Common Stock"), respectively, of Kodiak Sciences Inc. (the "Issuer") for $108.00 per share in an underwritten public offering (the "Offering") that closed on November 20, 2020.

F2 · ownership.nature: After giving effect to the transaction and as a result of their ownership interest in (i) Baker Biotech Capital, L.P. and (ii) 667, Julian C. Baker and Felix J. Baker each may be deemed to have an indirect pecuniary interest in Common Stock reported in column 5 of Table I directly held by 667, a limited partnership of which the sole general partner is Baker Biotech Capital, L.P., a limited partnership of which the sole general partner is Baker Biotech Capital (GP), LLC, due to their interest in 667 and Baker Biotech Capital, L.P.'s right to receive an allocation of a portion of the profits from 667.

F4 · ownership.nature: Baker Bros. Advisors LP (the "Adviser") serves as the investment adviser to the Funds. In connection with the services provided by the Adviser, the Adviser receives an asset-based management fee that does not confer any pecuniary interest in the securities held by the Funds. Baker Bros. Advisors (GP) LLC (the "Adviser GP") is the Adviser's sole general partner. Julian C. Baker and Felix J. Baker are managing members of the Adviser GP. The Adviser has complete and unlimited discretion and authority with respect to the investment and voting power of the securities held by the Funds. The general partners of the Funds relinquished to the Adviser all discretion and authority with respect to the investment and voting power of the securities held by the Funds.

F5 · ownership.nature: Julian C. Baker, Felix J. Baker, the Adviser GP and the Adviser disclaim beneficial ownership of the securities held directly by the Funds except to the extent of their pecuniary interest therein, and this report shall not be deemed an admission that any of Julian C. Baker, Felix J. Baker, the Adviser GP or the Adviser is a beneficial owner of such securities for purposes of Section 16 or any other purpose.

SEC source: 0001209191-20-060307 · doc4.xml · derivative · entry 9

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 338,675

Underlying: Common Stock · 6,950 shares

Expires 2028-08-29

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F8 · derivative.exercise_date: Twenty-five percent of the shares subject to the option vested on September 1, 2019 and 1/48th of the shares subject to the option vest on the same day of each month thereafter.

SEC source: 0001209191-20-060307 · doc4.xml · nonDerivative · entry 8

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,843

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

SEC source: 0001209191-20-060307 · doc4.xml · nonDerivative · entry 7

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,900

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F7 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $139.795 to $140.415, inclusive.

SEC source: 0001209191-20-060307 · doc4.xml · nonDerivative · entry 6

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,514

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F6 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $138.90 to $139.755, inclusive.

SEC source: 0001209191-20-060307 · doc4.xml · nonDerivative · entry 5

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 47,648

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F5 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $137.91 to $138.79, inclusive.

SEC source: 0001209191-20-060307 · doc4.xml · nonDerivative · entry 4

EHRLICH JASON · CIK 0001754049 · See Remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,629

F1 · kind: The sales reported in this Form 4 were effected pursuant to a 10b5-1 trading plan.

F4 · price: The price reported in Column 4 is a weighted-average price. The shares were sold in multiple transactions ranging from $136.87 to $137.81, inclusive.