TWST

SEC source: 0001209191-18-059802 · doc4.xml · derivative · entry 2

THORBURN JAMES M · CIK 0001252038 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 91,004

Underlying: Common Stock · 91,004 shares

Expires 2028-11-18

F2 · derivative.exercise_date: 12/60th of the shares subject to the option vest and become exercisable on October 31, 2019 and 1/60th of the shares subject to the option vest and become exercisable on each monthly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.

SEC source: 0001209191-18-059802 · doc4.xml · nonDerivative · entry 1

THORBURN JAMES M · CIK 0001252038 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,002

F1 · shares: Represents a restricted stock unit award (the "RSU Award") that vests in installments, with 12/60th of the shares subject to the RSU Award vesting on November 20, 2019 and 1/20th of the shares subject to the RSU Award vesting on each quarterly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.

SEC source: 0001209191-18-059800 · doc4.xml · derivative · entry 2

Leproust Emily M. · CIK 0001753655 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 266,539

Underlying: Common Stock · 266,539 shares

Expires 2028-11-18

F2 · derivative.exercise_date: 12/60th of the shares subject to the option vest and become exercisable on October 31, 2019 and 1/60th of the shares subject to the option vest and become exercisable on each monthly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.

SEC source: 0001209191-18-059800 · doc4.xml · nonDerivative · entry 1

Leproust Emily M. · CIK 0001753655 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 822,561

F1 · shares: Represents a restricted stock unit award (the "RSU Award") that vests in installments, with 12/60th of the shares subject to the RSU Award vesting on November 20, 2019 and 1/20th of the shares subject to the RSU Award vesting on each quarterly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.

SEC source: 0001209191-18-059805 · doc4.xml · derivative · entry 2

Weiss Patrick · CIK 0001755793 · SVP, R&D GM Data Storage

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 118,439

Underlying: Common Stock · 118,439 shares

Expires 2028-11-18

F2 · derivative.exercise_date: 12/60th of the shares subject to the option vest and become exercisable on October 31, 2019 and 1/60th of the shares subject to the option vest and become exercisable on each monthly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.

SEC source: 0001209191-18-059805 · doc4.xml · nonDerivative · entry 1

Weiss Patrick · CIK 0001755793 · SVP, R&D GM Data Storage

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 105,287

F1 · shares: Represents a restricted stock unit award (the "RSU Award") that vests in installments, with 12/60th of the shares subject to the RSU Award vesting on November 20, 2019 and 1/20th of the shares subject to the RSU Award vesting on each quarterly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.

SEC source: 0001209191-18-059801 · doc4.xml · derivative · entry 2

Peck Bill · CIK 0001756137 · Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,004

Underlying: Common Stock · 35,004 shares

Expires 2028-11-18

F2 · derivative.exercise_date: 12/60th of the shares subject to the option vest and become exercisable on October 31, 2019 and 1/60th of the shares subject to the option vest and become exercisable on each monthly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.

SEC source: 0001209191-18-059801 · doc4.xml · nonDerivative · entry 1

Peck Bill · CIK 0001756137 · Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 723,332

F1 · shares: Represents a restricted stock unit award (the "RSU Award") that vests in installments, with 12/60th of the shares subject to the RSU Award vesting on November 20, 2019 and 1/20th of the shares subject to the RSU Award vesting on each quarterly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.

SEC source: 0001209191-18-059799 · doc4.xml · derivative · entry 2

Green Paula · CIK 0001753672 · VP of Human Resources

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,004

Underlying: Common Stock · 35,004 shares

Expires 2028-11-18

F2 · derivative.exercise_date: 12/60th of the shares subject to the option vest and become exercisable on October 31, 2019 and 1/60th of the shares subject to the option vest and become exercisable on each monthly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.

SEC source: 0001209191-18-059799 · doc4.xml · nonDerivative · entry 1

Green Paula · CIK 0001753672 · VP of Human Resources

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,003

F1 · shares: Represents a restricted stock unit award (the "RSU Award") that vests in installments, with 12/60th of the shares subject to the RSU Award vesting on November 20, 2019 and 1/20th of the shares subject to the RSU Award vesting on each quarterly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.

SEC source: 0001209191-18-059796 · doc4.xml · derivative · entry 2

Daniels Mark · CIK 0001753840 · SVP, Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 70,000

Underlying: Common Stock · 70,000 shares

Expires 2028-11-18

F2 · derivative.exercise_date: 12/60th of the shares subject to the option vest and become exercisable on October 31, 2019 and 1/60th of the shares subject to the option vest and become exercisable on each monthly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.

SEC source: 0001209191-18-059796 · doc4.xml · nonDerivative · entry 1

Daniels Mark · CIK 0001753840 · SVP, Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,355

F1 · shares: Represents a restricted stock unit award (the "RSU Award") that vests in installments, with 12/60th of the shares subject to the RSU Award vesting on November 20, 2019 and 1/20th of the shares subject to the RSU Award vesting on each quarterly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.

SEC source: 0001209191-18-059795 · doc4.xml · derivative · entry 2

Banyai William · CIK 0001753670 · Director · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 91,004

Underlying: Common Stock · 91,004 shares

Expires 2028-11-18

F2 · derivative.exercise_date: 12/60th of the shares subject to the option vest and become exercisable on October 31, 2019 and 1/60th of the shares subject to the option vest and become exercisable on each monthly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.

SEC source: 0001209191-18-059795 · doc4.xml · nonDerivative · entry 1

Banyai William · CIK 0001753670 · Director · Chief Operating Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 747,332

F1 · shares: Represents a restricted stock unit award (the "RSU Award") that vests in installments, with 12/60th of the shares subject to the RSU Award vesting on November 20, 2019 and 1/20th of the shares subject to the RSU Award vesting on each quarterly anniversary thereafter, subject to the Reporting Person's continuous service through each vesting date.

SEC source: 0001209191-18-057430 · doc4.xml · derivative · entry 7

CRAVES FRED B · CIK 0001014095 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By The Craves Family Foundation

Disclosed balance after: 0

Underlying: Common Stock · 8,603 shares

Expires not disclosed

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_price: The Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F1 · derivative.exercise_date: The Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F1 · derivative.expiration_date: The Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The Reporting Person is a trustee of The Craves Family Foundation. The Reporting Person may be deemed to have voting and dispositive power over the shares held of record by The Craves Family Foundation. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.

SEC source: 0001209191-18-057430 · doc4.xml · derivative · entry 6

CRAVES FRED B · CIK 0001014095 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By The Craves Family Foundation

Disclosed balance after: 0

Underlying: Common Stock · 7,158 shares

Expires not disclosed

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_price: The Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F1 · derivative.exercise_date: The Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F1 · derivative.expiration_date: The Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The Reporting Person is a trustee of The Craves Family Foundation. The Reporting Person may be deemed to have voting and dispositive power over the shares held of record by The Craves Family Foundation. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.

SEC source: 0001209191-18-057430 · doc4.xml · derivative · entry 5

CRAVES FRED B · CIK 0001014095 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By The Craves Family Foundation

Disclosed balance after: 0

Underlying: Common Stock · 51,010 shares

Expires not disclosed

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_price: The Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F1 · derivative.exercise_date: The Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F1 · derivative.expiration_date: The Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The Reporting Person is a trustee of The Craves Family Foundation. The Reporting Person may be deemed to have voting and dispositive power over the shares held of record by The Craves Family Foundation. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.

SEC source: 0001209191-18-057430 · doc4.xml · nonDerivative · entry 3

CRAVES FRED B · CIK 0001014095 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By the Craves Family Foundation

Disclosed balance after: 66,771

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 · price: The Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The Reporting Person is a trustee of The Craves Family Foundation. The Reporting Person may be deemed to have voting and dispositive power over the shares held of record by The Craves Family Foundation. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.

SEC source: 0001209191-18-057430 · doc4.xml · nonDerivative · entry 2

CRAVES FRED B · CIK 0001014095 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By the Craves Family Foundation

Disclosed balance after: 58,168

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 · price: The Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The Reporting Person is a trustee of The Craves Family Foundation. The Reporting Person may be deemed to have voting and dispositive power over the shares held of record by The Craves Family Foundation. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.

SEC source: 0001209191-18-057430 · doc4.xml · nonDerivative · entry 1

CRAVES FRED B · CIK 0001014095 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By the Craves Family Foundation

Disclosed balance after: 51,010

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 · price: The Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The Reporting Person is a trustee of The Craves Family Foundation. The Reporting Person may be deemed to have voting and dispositive power over the shares held of record by The Craves Family Foundation. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.

SEC source: 0001209191-18-057433 · doc4.xml · derivative · entry 2

Ever Alpha Fund L.P. · CIK 0001757411 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 3,294,961 shares

Expires not disclosed

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_price: The Series D Preferred Stock has no expiration date and will convert into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F1 · derivative.exercise_date: The Series D Preferred Stock has no expiration date and will convert into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F1 · derivative.expiration_date: The Series D Preferred Stock has no expiration date and will convert into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.direct: Ever Glory Limited is the general partner of Ever Alpha Fund L.P. Ever Glory Limited is a wholly owned subsidiary of Guangfa Xinde Capital Management Limited. Guangfa Xinde Capital Management Limited is a wholly owned subsidiary of Guangfa Investment (Hong Kong) Company Limited. Guangfa Investment (Hong Kong) Company Limited is a wholly owned subsidiary of Guangfa Holding (Hong Kong) Corporation Limited.

SEC source: 0001209191-18-057433 · doc4.xml · nonDerivative · entry 1

Ever Alpha Fund L.P. · CIK 0001757411 · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,294,961

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 · price: The Series D Preferred Stock has no expiration date and will convert into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.direct: Ever Glory Limited is the general partner of Ever Alpha Fund L.P. Ever Glory Limited is a wholly owned subsidiary of Guangfa Xinde Capital Management Limited. Guangfa Xinde Capital Management Limited is a wholly owned subsidiary of Guangfa Investment (Hong Kong) Company Limited. Guangfa Investment (Hong Kong) Company Limited is a wholly owned subsidiary of Guangfa Holding (Hong Kong) Corporation Limited.

SEC source: 0001209191-18-057432 · doc4.xml · derivative · entry 9

RAGUSA ROBERT P · CIK 0001222644 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Illumina, Inc.

Disclosed balance after: 0

Underlying: Common Stock · 157,215 shares

Expires not disclosed

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_price: The Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F1 · derivative.exercise_date: The Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F1 · derivative.expiration_date: The Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The Reporting Person is the Senior Vice President, Global Quality and Operations of Illumina, Inc. and has sole voting and dispositive power over the shares held of record by Illumina, Inc. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.

SEC source: 0001209191-18-057432 · doc4.xml · derivative · entry 8

RAGUSA ROBERT P · CIK 0001222644 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Illumina, Inc.

Disclosed balance after: 0

Underlying: Common Stock · 673,378 shares

Expires not disclosed

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_price: The Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F1 · derivative.exercise_date: The Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F1 · derivative.expiration_date: The Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The Reporting Person is the Senior Vice President, Global Quality and Operations of Illumina, Inc. and has sole voting and dispositive power over the shares held of record by Illumina, Inc. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.

SEC source: 0001209191-18-057432 · doc4.xml · derivative · entry 7

RAGUSA ROBERT P · CIK 0001222644 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Illumina, Inc.

Disclosed balance after: 0

Underlying: Common Stock · 329,305 shares

Expires not disclosed

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_price: The Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F1 · derivative.exercise_date: The Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F1 · derivative.expiration_date: The Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The Reporting Person is the Senior Vice President, Global Quality and Operations of Illumina, Inc. and has sole voting and dispositive power over the shares held of record by Illumina, Inc. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.

SEC source: 0001209191-18-057432 · doc4.xml · derivative · entry 6

RAGUSA ROBERT P · CIK 0001222644 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Illumina, Inc.

Disclosed balance after: 0

Underlying: Common Stock · 542,203 shares

Expires not disclosed

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_price: The Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F1 · derivative.exercise_date: The Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F1 · derivative.expiration_date: The Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The Reporting Person is the Senior Vice President, Global Quality and Operations of Illumina, Inc. and has sole voting and dispositive power over the shares held of record by Illumina, Inc. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.

SEC source: 0001209191-18-057432 · doc4.xml · nonDerivative · entry 4

RAGUSA ROBERT P · CIK 0001222644 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Illumina, Inc.

Disclosed balance after: 1,702,101

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 · price: The Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The Reporting Person is the Senior Vice President, Global Quality and Operations of Illumina, Inc. and has sole voting and dispositive power over the shares held of record by Illumina, Inc. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.

SEC source: 0001209191-18-057432 · doc4.xml · nonDerivative · entry 3

RAGUSA ROBERT P · CIK 0001222644 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Illumina, Inc.

Disclosed balance after: 1,544,886

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 · price: The Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The Reporting Person is the Senior Vice President, Global Quality and Operations of Illumina, Inc. and has sole voting and dispositive power over the shares held of record by Illumina, Inc. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.

SEC source: 0001209191-18-057432 · doc4.xml · nonDerivative · entry 2

RAGUSA ROBERT P · CIK 0001222644 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Illumina, Inc.

Disclosed balance after: 871,508

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 · price: The Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The Reporting Person is the Senior Vice President, Global Quality and Operations of Illumina, Inc. and has sole voting and dispositive power over the shares held of record by Illumina, Inc. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.

SEC source: 0001209191-18-057432 · doc4.xml · nonDerivative · entry 1

RAGUSA ROBERT P · CIK 0001222644 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Illumina, Inc.

Disclosed balance after: 542,203

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 · price: The Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock and Series D Preferred Stock have no expiration date and converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering.

F2 · ownership.nature: The Reporting Person is the Senior Vice President, Global Quality and Operations of Illumina, Inc. and has sole voting and dispositive power over the shares held of record by Illumina, Inc. The Reporting Person disclaims beneficial ownership in these shares except as to the Reporting Person's pecuniary interest therein.

SEC source: 0001012975-18-001198 · edgar.xml · derivative · entry 12

ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner

ARCH Venture Fund VII, L.P. · CIK 0001402439 · 10% owner

ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner

ARCH Venture Partners VII, L.P. · CIK 0001544444 · 10% owner

ARCH Venture Partners VII, LLC · CIK 0001544443 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 894,146 shares

Expires not disclosed

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_price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · derivative.exercise_date: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F6 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F5 · ownership.nature: The shares are directly held by ARCH Venture Fund VIII Overage, L.P. ("ARCH Overage"). The sole general partner of ARCH Overage is ARCH Venture Partners VIII, LLC ("AVP GPLLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Overage. AVP GPLLC disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Clinton Bybee and Robert Nelsen are the managing directors of ARCH VII LLC and ARCH VIII LLC, and they may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Messrs. Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001012975-18-001198 · edgar.xml · derivative · entry 11

ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner

ARCH Venture Fund VII, L.P. · CIK 0001402439 · 10% owner

ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner

ARCH Venture Partners VII, L.P. · CIK 0001544444 · 10% owner

ARCH Venture Partners VII, LLC · CIK 0001544443 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 224,726 shares

Expires not disclosed

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_price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · derivative.exercise_date: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F6 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F2 · ownership.nature: The shares are directly held by ARCH Venture Fund VII, L.P. ("ARCH Fund VII"). The sole general partner of ARCH Fund VII is ARCH Venture Partners VII, L.P. ("ARCH Partners VII"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. The sole general partner of ARCH Partners VII is ARCH Venture Partners VII, LLC ("ARCH VII LLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. ARCH Partners VII and ARCH VII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Clinton Bybee and Robert Nelsen are the managing directors of ARCH VII LLC and ARCH VIII LLC, and they may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Messrs. Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001012975-18-001198 · edgar.xml · derivative · entry 10

ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner

ARCH Venture Fund VII, L.P. · CIK 0001402439 · 10% owner

ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner

ARCH Venture Partners VII, L.P. · CIK 0001544444 · 10% owner

ARCH Venture Partners VII, LLC · CIK 0001544443 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 266,776 shares

Expires not disclosed

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_price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · derivative.exercise_date: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F6 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F2 · ownership.nature: The shares are directly held by ARCH Venture Fund VII, L.P. ("ARCH Fund VII"). The sole general partner of ARCH Fund VII is ARCH Venture Partners VII, L.P. ("ARCH Partners VII"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. The sole general partner of ARCH Partners VII is ARCH Venture Partners VII, LLC ("ARCH VII LLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. ARCH Partners VII and ARCH VII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Clinton Bybee and Robert Nelsen are the managing directors of ARCH VII LLC and ARCH VIII LLC, and they may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Messrs. Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001012975-18-001198 · edgar.xml · derivative · entry 9

ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner

ARCH Venture Fund VII, L.P. · CIK 0001402439 · 10% owner

ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner

ARCH Venture Partners VII, L.P. · CIK 0001544444 · 10% owner

ARCH Venture Partners VII, LLC · CIK 0001544443 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 718,275 shares

Expires not disclosed

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_price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · derivative.exercise_date: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F6 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F2 · ownership.nature: The shares are directly held by ARCH Venture Fund VII, L.P. ("ARCH Fund VII"). The sole general partner of ARCH Fund VII is ARCH Venture Partners VII, L.P. ("ARCH Partners VII"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. The sole general partner of ARCH Partners VII is ARCH Venture Partners VII, LLC ("ARCH VII LLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. ARCH Partners VII and ARCH VII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Clinton Bybee and Robert Nelsen are the managing directors of ARCH VII LLC and ARCH VIII LLC, and they may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Messrs. Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001012975-18-001198 · edgar.xml · derivative · entry 8

ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner

ARCH Venture Fund VII, L.P. · CIK 0001402439 · 10% owner

ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner

ARCH Venture Partners VII, L.P. · CIK 0001544444 · 10% owner

ARCH Venture Partners VII, LLC · CIK 0001544443 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 1,182,645 shares

Expires not disclosed

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_price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · derivative.exercise_date: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F6 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F2 · ownership.nature: The shares are directly held by ARCH Venture Fund VII, L.P. ("ARCH Fund VII"). The sole general partner of ARCH Fund VII is ARCH Venture Partners VII, L.P. ("ARCH Partners VII"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. The sole general partner of ARCH Partners VII is ARCH Venture Partners VII, LLC ("ARCH VII LLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. ARCH Partners VII and ARCH VII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Clinton Bybee and Robert Nelsen are the managing directors of ARCH VII LLC and ARCH VIII LLC, and they may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Messrs. Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001012975-18-001198 · edgar.xml · nonDerivative · entry 7

ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner

ARCH Venture Fund VII, L.P. · CIK 0001402439 · 10% owner

ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner

ARCH Venture Partners VII, L.P. · CIK 0001544444 · 10% owner

ARCH Venture Partners VII, LLC · CIK 0001544443 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 954,146

F4 · shares: Reflects shares purchased in the Issuer's initial public offering.

F5 · ownership.nature: The shares are directly held by ARCH Venture Fund VIII Overage, L.P. ("ARCH Overage"). The sole general partner of ARCH Overage is ARCH Venture Partners VIII, LLC ("AVP GPLLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Overage. AVP GPLLC disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Clinton Bybee and Robert Nelsen are the managing directors of ARCH VII LLC and ARCH VIII LLC, and they may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Messrs. Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001012975-18-001198 · edgar.xml · nonDerivative · entry 6

ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner

ARCH Venture Fund VII, L.P. · CIK 0001402439 · 10% owner

ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner

ARCH Venture Partners VII, L.P. · CIK 0001544444 · 10% owner

ARCH Venture Partners VII, LLC · CIK 0001544443 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 894,146

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 · price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F5 · ownership.nature: The shares are directly held by ARCH Venture Fund VIII Overage, L.P. ("ARCH Overage"). The sole general partner of ARCH Overage is ARCH Venture Partners VIII, LLC ("AVP GPLLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Overage. AVP GPLLC disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Clinton Bybee and Robert Nelsen are the managing directors of ARCH VII LLC and ARCH VIII LLC, and they may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Messrs. Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001012975-18-001198 · edgar.xml · nonDerivative · entry 5

ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner

ARCH Venture Fund VII, L.P. · CIK 0001402439 · 10% owner

ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner

ARCH Venture Partners VII, L.P. · CIK 0001544444 · 10% owner

ARCH Venture Partners VII, LLC · CIK 0001544443 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 2,407,422

F4 · shares: Reflects shares purchased in the Issuer's initial public offering.

F2 · ownership.nature: The shares are directly held by ARCH Venture Fund VII, L.P. ("ARCH Fund VII"). The sole general partner of ARCH Fund VII is ARCH Venture Partners VII, L.P. ("ARCH Partners VII"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. The sole general partner of ARCH Partners VII is ARCH Venture Partners VII, LLC ("ARCH VII LLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. ARCH Partners VII and ARCH VII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Clinton Bybee and Robert Nelsen are the managing directors of ARCH VII LLC and ARCH VIII LLC, and they may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Messrs. Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001012975-18-001198 · edgar.xml · nonDerivative · entry 4

ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner

ARCH Venture Fund VII, L.P. · CIK 0001402439 · 10% owner

ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner

ARCH Venture Partners VII, L.P. · CIK 0001544444 · 10% owner

ARCH Venture Partners VII, LLC · CIK 0001544443 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 2,392,422

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 · price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F2 · ownership.nature: The shares are directly held by ARCH Venture Fund VII, L.P. ("ARCH Fund VII"). The sole general partner of ARCH Fund VII is ARCH Venture Partners VII, L.P. ("ARCH Partners VII"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. The sole general partner of ARCH Partners VII is ARCH Venture Partners VII, LLC ("ARCH VII LLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. ARCH Partners VII and ARCH VII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Clinton Bybee and Robert Nelsen are the managing directors of ARCH VII LLC and ARCH VIII LLC, and they may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Messrs. Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001012975-18-001198 · edgar.xml · nonDerivative · entry 3

ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner

ARCH Venture Fund VII, L.P. · CIK 0001402439 · 10% owner

ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner

ARCH Venture Partners VII, L.P. · CIK 0001544444 · 10% owner

ARCH Venture Partners VII, LLC · CIK 0001544443 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 2,167,696

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 · price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F2 · ownership.nature: The shares are directly held by ARCH Venture Fund VII, L.P. ("ARCH Fund VII"). The sole general partner of ARCH Fund VII is ARCH Venture Partners VII, L.P. ("ARCH Partners VII"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. The sole general partner of ARCH Partners VII is ARCH Venture Partners VII, LLC ("ARCH VII LLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. ARCH Partners VII and ARCH VII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Clinton Bybee and Robert Nelsen are the managing directors of ARCH VII LLC and ARCH VIII LLC, and they may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Messrs. Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001012975-18-001198 · edgar.xml · nonDerivative · entry 2

ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner

ARCH Venture Fund VII, L.P. · CIK 0001402439 · 10% owner

ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner

ARCH Venture Partners VII, L.P. · CIK 0001544444 · 10% owner

ARCH Venture Partners VII, LLC · CIK 0001544443 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 1,900,920

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 · price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F2 · ownership.nature: The shares are directly held by ARCH Venture Fund VII, L.P. ("ARCH Fund VII"). The sole general partner of ARCH Fund VII is ARCH Venture Partners VII, L.P. ("ARCH Partners VII"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. The sole general partner of ARCH Partners VII is ARCH Venture Partners VII, LLC ("ARCH VII LLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. ARCH Partners VII and ARCH VII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Clinton Bybee and Robert Nelsen are the managing directors of ARCH VII LLC and ARCH VIII LLC, and they may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Messrs. Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001012975-18-001198 · edgar.xml · nonDerivative · entry 1

ARCH Venture Partners VIII, LLC · CIK 0001616165 · 10% owner

ARCH Venture Fund VII, L.P. · CIK 0001402439 · 10% owner

ARCH Venture Fund VIII Overage, L.P. · CIK 0001617237 · 10% owner

ARCH Venture Partners VII, L.P. · CIK 0001544444 · 10% owner

ARCH Venture Partners VII, LLC · CIK 0001544443 · 10% owner

BYBEE CLINTON · CIK 0001219043 · 10% owner

NELSEN ROBERT · CIK 0001219042 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 1,182,645

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 · price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F2 · ownership.nature: The shares are directly held by ARCH Venture Fund VII, L.P. ("ARCH Fund VII"). The sole general partner of ARCH Fund VII is ARCH Venture Partners VII, L.P. ("ARCH Partners VII"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. The sole general partner of ARCH Partners VII is ARCH Venture Partners VII, LLC ("ARCH VII LLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. ARCH Partners VII and ARCH VII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Clinton Bybee and Robert Nelsen are the managing directors of ARCH VII LLC and ARCH VIII LLC, and they may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Messrs. Bybee and Nelsen disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001209191-18-057429 · doc4.xml · derivative · entry 13

CRANDELL KEITH · CIK 0001219039 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

Underlying: Common Stock · 894,146 shares

Expires not disclosed

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_price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · derivative.exercise_date: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F6 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F3 · ownership.nature: Keith Crandell is a managing director of ARCH VII LLC and AVP GPLLC, and may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Mr. Crandell disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F5 · ownership.nature: The shares are directly held by ARCH Venture Fund VIII Overage, L.P. ("ARCH Overage"). The sole general partner of ARCH Overage is ARCH Venture Partners VIII, LLC ("AVP GPLLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Overage. AVP GPLLC disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001209191-18-057429 · doc4.xml · derivative · entry 12

CRANDELL KEITH · CIK 0001219039 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

Underlying: Common Stock · 224,726 shares

Expires not disclosed

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_price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · derivative.exercise_date: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F6 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F2 · ownership.nature: The shares are directly held by ARCH Venture Fund VII, L.P. ("ARCH Fund VII"). The sole general partner of ARCH Fund VII is ARCH Venture Partners VII, L.P. ("ARCH Partners VII"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. The sole general partner of ARCH Partners VII is ARCH Venture Partners VII, LLC ("ARCH VII LLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. ARCH Partners VII and ARCH VII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Keith Crandell is a managing director of ARCH VII LLC and AVP GPLLC, and may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Mr. Crandell disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001209191-18-057429 · doc4.xml · derivative · entry 11

CRANDELL KEITH · CIK 0001219039 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

Underlying: Common Stock · 266,776 shares

Expires not disclosed

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_price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · derivative.exercise_date: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F6 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F2 · ownership.nature: The shares are directly held by ARCH Venture Fund VII, L.P. ("ARCH Fund VII"). The sole general partner of ARCH Fund VII is ARCH Venture Partners VII, L.P. ("ARCH Partners VII"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. The sole general partner of ARCH Partners VII is ARCH Venture Partners VII, LLC ("ARCH VII LLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. ARCH Partners VII and ARCH VII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Keith Crandell is a managing director of ARCH VII LLC and AVP GPLLC, and may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Mr. Crandell disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001209191-18-057429 · doc4.xml · derivative · entry 10

CRANDELL KEITH · CIK 0001219039 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

Underlying: Common Stock · 718,275 shares

Expires not disclosed

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_price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · derivative.exercise_date: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F6 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F2 · ownership.nature: The shares are directly held by ARCH Venture Fund VII, L.P. ("ARCH Fund VII"). The sole general partner of ARCH Fund VII is ARCH Venture Partners VII, L.P. ("ARCH Partners VII"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. The sole general partner of ARCH Partners VII is ARCH Venture Partners VII, LLC ("ARCH VII LLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. ARCH Partners VII and ARCH VII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Keith Crandell is a managing director of ARCH VII LLC and AVP GPLLC, and may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Mr. Crandell disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001209191-18-057429 · doc4.xml · derivative · entry 9

CRANDELL KEITH · CIK 0001219039 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 0

Underlying: Common Stock · 1,182,645 shares

Expires not disclosed

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_price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F1 · derivative.exercise_date: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F6 · derivative.expiration_date: The expiration date is not relevant to the conversion of these securities.

F2 · ownership.nature: The shares are directly held by ARCH Venture Fund VII, L.P. ("ARCH Fund VII"). The sole general partner of ARCH Fund VII is ARCH Venture Partners VII, L.P. ("ARCH Partners VII"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. The sole general partner of ARCH Partners VII is ARCH Venture Partners VII, LLC ("ARCH VII LLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. ARCH Partners VII and ARCH VII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Keith Crandell is a managing director of ARCH VII LLC and AVP GPLLC, and may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Mr. Crandell disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001209191-18-057429 · doc4.xml · nonDerivative · entry 7

CRANDELL KEITH · CIK 0001219039 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 954,146

F4 · shares: Reflects shares purchased in the Issuer's initial public offering.

F3 · ownership.nature: Keith Crandell is a managing director of ARCH VII LLC and AVP GPLLC, and may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Mr. Crandell disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F5 · ownership.nature: The shares are directly held by ARCH Venture Fund VIII Overage, L.P. ("ARCH Overage"). The sole general partner of ARCH Overage is ARCH Venture Partners VIII, LLC ("AVP GPLLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Overage. AVP GPLLC disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001209191-18-057429 · doc4.xml · nonDerivative · entry 6

CRANDELL KEITH · CIK 0001219039 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 894,146

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 · price: Upon closing of the Issuer's initial public offering, each share of preferred stock was automatically converted into one share of the Issuer's common stock, for no additional consideration, on a 1:1 basis.

F3 · ownership.nature: Keith Crandell is a managing director of ARCH VII LLC and AVP GPLLC, and may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Mr. Crandell disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F5 · ownership.nature: The shares are directly held by ARCH Venture Fund VIII Overage, L.P. ("ARCH Overage"). The sole general partner of ARCH Overage is ARCH Venture Partners VIII, LLC ("AVP GPLLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Overage. AVP GPLLC disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

SEC source: 0001209191-18-057429 · doc4.xml · nonDerivative · entry 5

CRANDELL KEITH · CIK 0001219039 · Director · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 2,407,422

F4 · shares: Reflects shares purchased in the Issuer's initial public offering.

F2 · ownership.nature: The shares are directly held by ARCH Venture Fund VII, L.P. ("ARCH Fund VII"). The sole general partner of ARCH Fund VII is ARCH Venture Partners VII, L.P. ("ARCH Partners VII"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. The sole general partner of ARCH Partners VII is ARCH Venture Partners VII, LLC ("ARCH VII LLC"), which may be deemed to be the beneficial owner of the shares held by ARCH Fund VII. ARCH Partners VII and ARCH VII LLC disclaim beneficial ownership of such shares, except to the extent of any pecuniary interest therein.

F3 · ownership.nature: Keith Crandell is a managing director of ARCH VII LLC and AVP GPLLC, and may be deemed to beneficially own the shares held by ARCH Fund VII and ARCH Overage. Mr. Crandell disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein.