GH

SEC source: 0001628280-19-010785 · wf-form4_156582438647240.xml · nonDerivative · entry 3

Eltoukhy Helmy · CIK 0001752968 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,002,660

F1 · shares: These shares were sold under a pre-arranged sales plan pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. Some of the shares sold were acquired contemporaneously upon the cashless exercise of stock options at an exercise price of $4.18 per share.

F3 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $97.05 to $98.04, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder, 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 range set forth in this footnote.

SEC source: 0001628280-19-010785 · wf-form4_156582438647240.xml · nonDerivative · entry 2

Eltoukhy Helmy · CIK 0001752968 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,019,765

F1 · shares: These shares were sold under a pre-arranged sales plan pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. Some of the shares sold were acquired contemporaneously upon the cashless exercise of stock options at an exercise price of $4.18 per share.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $96.02 to $97.01, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder, 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 range set forth in this footnote.

SEC source: 0001628280-19-010785 · wf-form4_156582438647240.xml · nonDerivative · entry 1

Eltoukhy Helmy · CIK 0001752968 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,025,074

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: 0001628280-19-010688 · wf-form4_156572862264172.xml · nonDerivative · entry 1

Hilaly Aaref · CIK 0001606209 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By estate planning vehicles

Disclosed balance after: 16,703

F1 · kind: Represents the receipt of shares of Common Stock of the Issuer by virtue of a pro rata in-kind distribution by entities affiliated with Sequoia Capital to its partners or members, including subsequent distributions by general partners or managing members to their respective partners or members.

SEC source: 0001628280-19-010686 · wf-form4_156572842087153.xml · derivative · entry 9

Lanman Richard B. · CIK 0001721003 · Chief Medical Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,655

Underlying: COMMON STOCK · 3,458 shares

Expires 2028-08-21

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: The stock option vests and becomes exercisable in equal monthly installments over 48 months commencing on August 22, 2018.

F9 · derivative.expiration_date: The expiration date of August 22, 2028 reported in the Reporting Person's prior Form 4 filings was in error.

SEC source: 0001628280-19-010686 · wf-form4_156572842087153.xml · derivative · entry 8

Lanman Richard B. · CIK 0001721003 · Chief Medical Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,371

Underlying: COMMON STOCK · 2,307 shares

Expires 2027-05-30

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.

F6 · derivative.exercise_date: The stock option vests and becomes exercisable in equal monthly installments over 48 months commencing on April 1, 2017.

F7 · derivative.expiration_date: The expiration date of May 31, 2027 reported in the Reporting Person's prior Form 4 filings was in error.

SEC source: 0001628280-19-010686 · wf-form4_156572842087153.xml · nonDerivative · entry 7

Lanman Richard B. · CIK 0001721003 · Chief Medical Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 82,015

F1 · shares: These shares were sold under a pre-arranged sales plan pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. Some of the shares sold were acquired contemporaneously upon the cashless exercise of one or more stock options at an exercise price of $4.18 or $8.80 per share.

SEC source: 0001628280-19-010686 · wf-form4_156572842087153.xml · nonDerivative · entry 6

Lanman Richard B. · CIK 0001721003 · Chief Medical Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 82,515

F1 · shares: These shares were sold under a pre-arranged sales plan pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. Some of the shares sold were acquired contemporaneously upon the cashless exercise of one or more stock options at an exercise price of $4.18 or $8.80 per share.

F5 · price: The price reported in Column 4 is a weighted average price. The transaction was executed in multiple trades ranging from $106.11 to $107.02. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a stockholder of the Issuer, information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001628280-19-010686 · wf-form4_156572842087153.xml · nonDerivative · entry 5

Lanman Richard B. · CIK 0001721003 · Chief Medical Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 92,111

F1 · shares: These shares were sold under a pre-arranged sales plan pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. Some of the shares sold were acquired contemporaneously upon the cashless exercise of one or more stock options at an exercise price of $4.18 or $8.80 per share.

F4 · price: The price reported in Column 4 is a weighted average price. The transaction was executed in multiple trades ranging from $105.11 to $106.10. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a stockholder of the Issuer, information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001628280-19-010686 · wf-form4_156572842087153.xml · nonDerivative · entry 4

Lanman Richard B. · CIK 0001721003 · Chief Medical Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 117,631

F1 · shares: These shares were sold under a pre-arranged sales plan pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. Some of the shares sold were acquired contemporaneously upon the cashless exercise of one or more stock options at an exercise price of $4.18 or $8.80 per share.

F3 · price: The price reported in Column 4 is a weighted average price. The transaction was executed in multiple trades ranging from $104.11 to $105.10. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a stockholder of the Issuer, information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001628280-19-010686 · wf-form4_156572842087153.xml · nonDerivative · entry 3

Lanman Richard B. · CIK 0001721003 · Chief Medical Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 133,691

F1 · shares: These shares were sold under a pre-arranged sales plan pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. Some of the shares sold were acquired contemporaneously upon the cashless exercise of one or more stock options at an exercise price of $4.18 or $8.80 per share.

F2 · price: The price reported in Column 4 is a weighted average price. The transaction was executed in multiple trades ranging from $103.10 to $104.08. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a stockholder of the Issuer, information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001628280-19-010686 · wf-form4_156572842087153.xml · nonDerivative · entry 2

Lanman Richard B. · CIK 0001721003 · Chief Medical Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 145,090

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: 0001628280-19-010686 · wf-form4_156572842087153.xml · nonDerivative · entry 1

Lanman Richard B. · CIK 0001721003 · Chief Medical Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 141,632

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: 0001628280-19-010847 · wf-form4_156591749055828.xml · nonDerivative · entry 1

Nishar Dipchand · CIK 0001519500 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,632

F1 · kind: Represents the receipt of shares of Common Stock of the Issuer by virtue of a pro-rata distribution from Mr. Nishar's investment in an investment fund.

SEC source: 0001628280-19-010969 · wf-form4a_156626137294213.xml · nonDerivative · entry 1

Hilaly Aaref · CIK 0001606209 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By estate planning vehicles

Disclosed balance after: 16,373

F1 · kind: Represents the receipt of shares of Common Stock of the Issuer by virtue of a pro rata in-kind distribution by entities affiliated with Sequoia Capital to its partners or members, including subsequent distributions by general partners or managing members to their respective partners or members.

SEC source: 0001628280-19-010633 · wf-form4_156564258561269.xml · nonDerivative · entry 1

Kaul Samir · CIK 0001501915 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust

Disclosed balance after: 1,405

F1 · kind: On August 8, 2019, shares of Common Stock of the Issuer held by Khosla Ventures IV, LP, Khosla Ventures IV (CF), LP and Khosla Ventures Associates IV, LLC were distributed to their underlying partners and members. As part of such distributions, Mr. Kaul received 1,405 shares of the Issuer's Common Stock.

F2 · ownership.nature: Consists of securities held of record by a trust for the benefit of Mr. Kaul and his family.

SEC source: 0001628280-19-010481 · wf-form4_156529758863178.xml · derivative · entry 7

CLARK IAN T · CIK 0001336504 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,526

Underlying: COMMON STOCK · 1,614 shares

Expires 2027-11-29

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.

F7 · derivative.exercise_date: The stock option vests and becomes exercisable in equal monthly installments over 48 months commencing on October 25, 2017.

SEC source: 0001628280-19-010481 · wf-form4_156529758863178.xml · derivative · entry 6

CLARK IAN T · CIK 0001336504 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 45,729

Underlying: COMMON STOCK · 8,069 shares

Expires 2027-05-30

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.

F5 · derivative.exercise_date: The stock option vests and becomes exercisable in equal monthly installments over 48 months commencing on January 3, 2017.

F6 · derivative.expiration_date: The expiration date of May 31, 2027 reported in the Reporting Person's prior Form 3 and Form 4 filings was in error.

SEC source: 0001628280-19-010481 · wf-form4_156529758863178.xml · nonDerivative · entry 5

CLARK IAN T · CIK 0001336504 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,302

F1 · shares: These shares were sold under a pre-arranged sales plan pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. The shares sold were acquired contemporaneously upon the cashless exercise of stock options at an exercise price of $4.18 per share.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $90.09 to $90.60, inclusive. The Reporting Person undertakes to provide to 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 this footnote.

SEC source: 0001628280-19-010481 · wf-form4_156529758863178.xml · nonDerivative · entry 4

CLARK IAN T · CIK 0001336504 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,315

F1 · shares: These shares were sold under a pre-arranged sales plan pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. The shares sold were acquired contemporaneously upon the cashless exercise of stock options at an exercise price of $4.18 per share.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $89.08 to $90.03, inclusive. The Reporting Person undertakes to provide to 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 this footnote.

SEC source: 0001628280-19-010481 · wf-form4_156529758863178.xml · nonDerivative · entry 3

CLARK IAN T · CIK 0001336504 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,021

F1 · shares: These shares were sold under a pre-arranged sales plan pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. The shares sold were acquired contemporaneously upon the cashless exercise of stock options at an exercise price of $4.18 per share.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $88.00 to $88.55, inclusive. The Reporting Person undertakes to provide to 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 this footnote.

SEC source: 0001628280-19-010481 · wf-form4_156529758863178.xml · nonDerivative · entry 2

CLARK IAN T · CIK 0001336504 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,985

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: 0001628280-19-010481 · wf-form4_156529758863178.xml · nonDerivative · entry 1

CLARK IAN T · CIK 0001336504 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,371

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: 0001628280-19-010910 · wf-form4_156600188688154.xml · nonDerivative · entry 5

Wiley Michael J · CIK 0001753789 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · Matthew Wiley 2019 Irrevocable Trust

Disclosed balance after: 10,000

F1 · ownership.direct: The Reporting Person disclaims beneficial ownership of such shares except to the extent of his indirect pecuniary interest therein, if any.

SEC source: 0001628280-19-010910 · wf-form4_156600188688154.xml · nonDerivative · entry 4

Wiley Michael J · CIK 0001753789 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · Coleman Wiley 2019 Irrevocable Trust

Disclosed balance after: 10,000

F1 · ownership.direct: The Reporting Person disclaims beneficial ownership of such shares except to the extent of his indirect pecuniary interest therein, if any.

SEC source: 0001628280-19-010910 · wf-form4_156600188688154.xml · nonDerivative · entry 3

Wiley Michael J · CIK 0001753789 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · Andrew Wiley 2019 Irrevocable Trust

Disclosed balance after: 10,000

F1 · ownership.direct: The Reporting Person disclaims beneficial ownership of such shares except to the extent of his indirect pecuniary interest therein, if any.

SEC source: 0001628280-19-010910 · wf-form4_156600188688154.xml · nonDerivative · entry 2

Wiley Michael J · CIK 0001753789 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · Isabella Wiley 2019 Irrevocable Trust

Disclosed balance after: 10,000

F1 · ownership.direct: The Reporting Person disclaims beneficial ownership of such shares except to the extent of his indirect pecuniary interest therein, if any.

SEC source: 0001628280-19-010910 · wf-form4_156600188688154.xml · nonDerivative · entry 1

Wiley Michael J · CIK 0001753789 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 231,737

SEC source: 0001628280-19-010000 · wf-form4_156503988474607.xml · derivative · entry 2

Wiley Michael J · CIK 0001753789 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,442

Underlying: COMMON STOCK · 17,442 shares

Expires 2029-07-31

F1 · derivative.exercise_date: The stock option vests and becomes exercisable in equal monthly installments over 48 months.

SEC source: 0001628280-19-010000 · wf-form4_156503988474607.xml · nonDerivative · entry 1

Wiley Michael J · CIK 0001753789 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 271,737

SEC source: 0001628280-19-010003 · wf-form4_156504011213146.xml · derivative · entry 2

BERTOCCI DEREK A · CIK 0001206964 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,442

Underlying: COMMON STOCK · 17,442 shares

Expires 2029-07-31

F2 · derivative.exercise_date: The stock option vests and becomes exercisable in equal monthly installments over 48 months.

SEC source: 0001628280-19-010003 · wf-form4_156504011213146.xml · nonDerivative · entry 1

BERTOCCI DEREK A · CIK 0001206964 · Chief Financial Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 99,962

F1 · balance_after: Includes shares acquired under the Issuer's 2018 Employee Stock Purchase Plan that were not included in the Reporting Person's last Form 4 filing.

SEC source: 0001628280-19-009999 · wf-form4_156503981135972.xml · derivative · entry 2

Lanman Richard B. · CIK 0001721003 · Chief Medical Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,069

Underlying: COMMON STOCK · 29,069 shares

Expires 2029-07-31

F1 · derivative.exercise_date: The stock option vests and becomes exercisable in equal monthly installments over 48 months.

SEC source: 0001628280-19-009999 · wf-form4_156503981135972.xml · nonDerivative · entry 1

Lanman Richard B. · CIK 0001721003 · Chief Medical Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 139,325

SEC source: 0001628280-19-008200 · wf-form4_156106849499625.xml · derivative · entry 2

MERESMAN STANLEY J · CIK 0001283102 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,255

Underlying: COMMON STOCK · 2,255 shares

Expires 2029-06-17

F1 · derivative.exercise_date: The stock option vests in full on the earlier to occur of (i) June 18, 2020 and (ii) the date of the next annual meeting of the Issuer's stockholders.

SEC source: 0001628280-19-008200 · wf-form4_156106849499625.xml · nonDerivative · entry 1

MERESMAN STANLEY J · CIK 0001283102 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,302

SEC source: 0001628280-19-008202 · wf-form4_156106859466285.xml · derivative · entry 2

CLARK IAN T · CIK 0001336504 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,255

Underlying: COMMON STOCK · 2,255 shares

Expires 2029-06-17

F1 · derivative.exercise_date: The stock option vests in full on the earlier to occur of (i) June 18, 2020 and (ii) the date of the next annual meeting of the Issuer's stockholders.

SEC source: 0001628280-19-008202 · wf-form4_156106859466285.xml · nonDerivative · entry 1

CLARK IAN T · CIK 0001336504 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,302

SEC source: 0001628280-19-008199 · wf-form4_156106841877475.xml · derivative · entry 2

Kaul Samir · CIK 0001501915 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,255

Underlying: COMMON STOCK · 2,255 shares

Expires 2029-06-17

F1 · derivative.exercise_date: The stock option vests in full on the earlier to occur of (i) June 18, 2020 and (ii) the date of the next annual meeting of the Issuer's stockholders.

SEC source: 0001628280-19-008199 · wf-form4_156106841877475.xml · nonDerivative · entry 1

Kaul Samir · CIK 0001501915 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,302

SEC source: 0001628280-19-008203 · wf-form4_156106864893131.xml · derivative · entry 2

Nishar Dipchand · CIK 0001519500 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,255

Underlying: COMMON STOCK · 2,255 shares

Expires 2029-06-17

F1 · derivative.exercise_date: The stock option vests in full on the earlier to occur of (i) June 18, 2020 and (ii) the date of the next annual meeting of the Issuer's stockholders.

SEC source: 0001628280-19-008203 · wf-form4_156106864893131.xml · nonDerivative · entry 1

Nishar Dipchand · CIK 0001519500 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,302

SEC source: 0001628280-19-008201 · wf-form4_156106854816229.xml · derivative · entry 2

Hilaly Aaref · CIK 0001606209 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,255

Underlying: COMMON STOCK · 2,255 shares

Expires 2029-06-17

F1 · derivative.exercise_date: The stock option vests in full on the earlier to occur of (i) June 18, 2020 and (ii) the date of the next annual meeting of the Issuer's stockholders.

SEC source: 0001628280-19-008201 · wf-form4_156106854816229.xml · nonDerivative · entry 1

Hilaly Aaref · CIK 0001606209 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,302

SEC source: 0001628280-20-001426 · wf-form5_158154253907937.xml · nonDerivative · entry 1

Wiley Michael J · CIK 0001753789 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 111,171

SEC source: 0001628280-19-007062 · wf-form4_155839143419311.xml · nonDerivative · entry 1

Lanman Richard B. · CIK 0001721003 · Chief Medical Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 129,729

F1 · shares: These shares were sold under a pre-arranged sales plan pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended.

SEC source: 0001628280-19-006925 · wf-form4_155804300443992.xml · derivative · entry 6

Eltoukhy Helmy · CIK 0001752968 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,173,827

Underlying: COMMON STOCK · 25,255 shares

Expires 2022-07-13

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.

F4 · derivative.exercise_price: The exercise price of $4.17 reported in the Reporting Person's Form 3 filed on October 3, 2018 was in error.

F5 · derivative.exercise_date: The stock option vests and becomes exercisable in equal monthly installments over 48 months commencing on April 23, 2017.

F6 · derivative.expiration_date: The expiration date of July 13, 2027 reported in the Reporting Person's Form 3 filed on October 3, 2018 was in error.

SEC source: 0001628280-19-006925 · wf-form4_155804300443992.xml · nonDerivative · entry 3

Eltoukhy Helmy · CIK 0001752968 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,986,965

F1 · shares: These shares were sold under a pre-arranged sales plan pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. Some of the shares sold were acquired contemporaneously upon the cashless exercise of stock options at an exercise price of $4.18per share.

F3 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $72.28 to $72.88, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder, or the staff of the Securities andExchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001628280-19-006925 · wf-form4_155804300443992.xml · nonDerivative · entry 2

Eltoukhy Helmy · CIK 0001752968 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,041,093

F1 · shares: These shares were sold under a pre-arranged sales plan pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. Some of the shares sold were acquired contemporaneously upon the cashless exercise of stock options at an exercise price of $4.18per share.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $71.28 to $72.27, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder, or the staff of the Securities andExchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

SEC source: 0001628280-19-006925 · wf-form4_155804300443992.xml · nonDerivative · entry 1

Eltoukhy Helmy · CIK 0001752968 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,065,625

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.