GH

SEC source: 0001628280-19-004762 · wf-form4_155623750501525.xml · nonDerivative · entry 15

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Talasaz and Eskandari 2017 Family Trust

Disclosed balance after: 3,748,256

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.

F16 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $65.78 to $66.74, 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: 0001628280-19-004762 · wf-form4_155623750501525.xml · nonDerivative · entry 14

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Talasaz and Eskandari 2017 Family Trust

Disclosed balance after: 3,758,274

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.

F15 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $64.78 to $65.76, 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: 0001628280-19-004762 · wf-form4_155623750501525.xml · derivative · entry 28

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,139,454

Underlying: COMMON STOCK · 15,202 shares

Expires 2027-07-13

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.

F26 · derivative.exercise_date: The stock option vests and becomes exercisable in equal monthly installments over 48 months commencing on April 23, 2017.

SEC source: 0001628280-19-004762 · wf-form4_155623750501525.xml · nonDerivative · entry 13

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,438

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.

F14 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $67.46 to $68.00 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: 0001628280-19-004762 · wf-form4_155623750501525.xml · nonDerivative · entry 12

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,678

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.

F13 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $66.46 to $67.44 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: 0001628280-19-004762 · wf-form4_155623750501525.xml · nonDerivative · entry 11

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,635

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.

F12 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $65.44 to $66.43, 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: 0001628280-19-004762 · wf-form4_155623750501525.xml · nonDerivative · entry 10

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,045

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

F11 · shares: The shares were acquired and then sold contemporaneously upon the cashless exercise of stock option at an exercise price of $4.18 per share.

SEC source: 0001628280-19-004762 · wf-form4_155623750501525.xml · nonDerivative · entry 9

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Sana Talasaz 2018 Irrevocable Trust

Disclosed balance after: 18,399

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.

F10 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $67.43 to $68.03, 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: 0001628280-19-004762 · wf-form4_155623750501525.xml · nonDerivative · entry 8

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Sana Talasaz 2018 Irrevocable Trust

Disclosed balance after: 20,209

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.

F9 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $66.42 to $67.40, 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: 0001628280-19-004762 · wf-form4_155623750501525.xml · nonDerivative · entry 7

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Sana Talasaz 2018 Irrevocable Trust

Disclosed balance after: 28,389

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.

F8 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $65.41 to $66.36, 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: 0001628280-19-004762 · wf-form4_155623750501525.xml · nonDerivative · entry 6

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Samar Talasaz 2018 Irrevocable Trust

Disclosed balance after: 18,399

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.

F7 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $67.67 to $68.08, 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: 0001628280-19-004762 · wf-form4_155623750501525.xml · nonDerivative · entry 5

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Samar Talasaz 2018 Irrevocable Trust

Disclosed balance after: 19,399

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.

F6 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $66.67 to $67.66, 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: 0001628280-19-004762 · wf-form4_155623750501525.xml · nonDerivative · entry 4

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Samar Talasaz 2018 Irrevocable Trust

Disclosed balance after: 27,443

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.

F5 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $65.58 to $66.54, 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: 0001628280-19-004762 · wf-form4_155623750501525.xml · nonDerivative · entry 3

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Talasaz and Eskandari 2017 Family Trust

Disclosed balance after: 3,765,052

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.

F4 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $67.40 to $68.09, 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: 0001628280-19-004762 · wf-form4_155623750501525.xml · nonDerivative · entry 2

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Talasaz and Eskandari 2017 Family Trust

Disclosed balance after: 3,773,370

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.

F3 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $66.40 to $67.39, 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: 0001628280-19-004762 · wf-form4_155623750501525.xml · nonDerivative · entry 1

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Talasaz and Eskandari 2017 Family Trust

Disclosed balance after: 3,804,080

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.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $65.40 to $66.38, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · derivative · entry 27

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,154,656

Underlying: COMMON STOCK · 44,426 shares

Expires 2027-07-13

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.

F23 · derivative.exercise_price: The exercise price of $4.17 reported in the Reporting Person's Form 3/A filed on October 11, 2018 was in error.

F24 · derivative.exercise_date: The stock option vests and becomes exercisable in equal monthly installments over 48 months commencing on April 23, 2017.

SEC source: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 25

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,843

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.

F22 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $68.00 to $68.79, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 24

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,806

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.

F21 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $67.00 to $67.64, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 23

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,966

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.

F12 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $66.00 to $66.99, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 22

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,705

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.

F11 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $65.00 to $65.97, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 21

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,420

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.

F20 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $64.00 to $64.98, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 20

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 47,732

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.

F9 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $63.82 to $63.99, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 19

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 52,375

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.

F19 · shares: The shares were acquired and then sold contemporaneously upon the cashless exercise of stock option at an exercise price of $4.18 per share.

SEC source: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 18

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Sana Talasaz 2018 Irrevocable Trust

Disclosed balance after: 29,005

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.

F18 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $68.00 to $68.87, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 17

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Sana Talasaz 2018 Irrevocable Trust

Disclosed balance after: 30,791

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.

F17 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $67.00 to $67.99, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 16

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Sana Talasaz 2018 Irrevocable Trust

Disclosed balance after: 36,295

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.

F16 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $66.02 to $66.99, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 15

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Sana Talasaz 2018 Irrevocable Trust

Disclosed balance after: 39,365

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.

F15 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $65.00 to $65.96, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 14

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Sana Talasaz 2018 Irrevocable Trust

Disclosed balance after: 46,552

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.

F14 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $64.01 to $64.98, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 13

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Sana Talasaz 2018 Irrevocable Trust

Disclosed balance after: 56,454

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.

F9 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $63.82 to $63.99, 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.

F3 · balance_after: The allocation of shares among such entities reported in the Reporting Person's Form 4 filed on October 11, 2018 was in error and has been corrected in this form.

F3 · ownership.nature: The allocation of shares among such entities reported in the Reporting Person's Form 4 filed on October 11, 2018 was in error and has been corrected in this form.

SEC source: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 12

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Samar Talasaz 2018 Irrevocable Trust

Disclosed balance after: 29,005

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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 11

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Samar Talasaz 2018 Irrevocable Trust

Disclosed balance after: 29,075

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.

F13 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $67.00 to $67.60, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 10

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Samar Talasaz 2018 Irrevocable Trust

Disclosed balance after: 36,284

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.

F12 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $66.00 to $66.99, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 9

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Samar Talasaz 2018 Irrevocable Trust

Disclosed balance after: 40,914

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.

F11 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $65.00 to $65.97, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 8

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Samar Talasaz 2018 Irrevocable Trust

Disclosed balance after: 48,528

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.

F10 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $64.00 to $64.96, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 7

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Samar Talasaz 2018 Irrevocable Trust

Disclosed balance after: 55,767

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.

F9 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $63.82 to $63.99, 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.

F3 · balance_after: The allocation of shares among such entities reported in the Reporting Person's Form 4 filed on October 11, 2018 was in error and has been corrected in this form.

F3 · ownership.nature: The allocation of shares among such entities reported in the Reporting Person's Form 4 filed on October 11, 2018 was in error and has been corrected in this form.

SEC source: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 6

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Talasaz and Eskandari 2017 Family Trust

Disclosed balance after: 3,806,777

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.

F8 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $68.90 to $69.01, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 5

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Talasaz and Eskandari 2017 Family Trust

Disclosed balance after: 3,806,878

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.

F7 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $67.82 to $68.76, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 4

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Talasaz and Eskandari 2017 Family Trust

Disclosed balance after: 3,816,480

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.

F6 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $66.80 to $67.78, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 3

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Talasaz and Eskandari 2017 Family Trust

Disclosed balance after: 3,842,129

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.

F5 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $65.80 to $66.75, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 2

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Talasaz and Eskandari 2017 Family Trust

Disclosed balance after: 3,858,723

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.

F4 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $64.80 to $65.79, 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: 0001628280-19-004662 · wf-form4_155614969045425.xml · nonDerivative · entry 1

Talasaz AmirAli · CIK 0001753159 · Director · Chairman, President and COO

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Talasaz and Eskandari 2017 Family Trust

Disclosed balance after: 3,882,326

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.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $63.80 to $64.79, 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.

F3 · balance_after: The allocation of shares among such entities reported in the Reporting Person's Form 4 filed on October 11, 2018 was in error and has been corrected in this form.

F3 · ownership.nature: The allocation of shares among such entities reported in the Reporting Person's Form 4 filed on October 11, 2018 was in error and has been corrected in this form.

SEC source: 0001628280-19-004663 · wf-form4_155614977424576.xml · nonDerivative · entry 16

Eltoukhy Helmy · CIK 0001752968 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Isabella Eltoukhy 2018 Irrevocable Trust

Disclosed balance after: 43,780

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: 0001628280-19-004663 · wf-form4_155614977424576.xml · nonDerivative · entry 15

Eltoukhy Helmy · CIK 0001752968 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Isabella Eltoukhy 2018 Irrevocable Trust

Disclosed balance after: 43,880

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.

F16 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $67.89 to $68.70, 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: 0001628280-19-004663 · wf-form4_155614977424576.xml · nonDerivative · entry 14

Eltoukhy Helmy · CIK 0001752968 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Isabella Eltoukhy 2018 Irrevocable Trust

Disclosed balance after: 45,703

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.

F15 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $66.89 to $67.78, 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: 0001628280-19-004663 · wf-form4_155614977424576.xml · nonDerivative · entry 13

Eltoukhy Helmy · CIK 0001752968 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Isabella Eltoukhy 2018 Irrevocable Trust

Disclosed balance after: 48,411

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.

F14 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $65.88 to $66.75, 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: 0001628280-19-004663 · wf-form4_155614977424576.xml · nonDerivative · entry 12

Eltoukhy Helmy · CIK 0001752968 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Isabella Eltoukhy 2018 Irrevocable Trust

Disclosed balance after: 51,836

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.

F13 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $64.88 to $65.87, 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: 0001628280-19-004663 · wf-form4_155614977424576.xml · nonDerivative · entry 11

Eltoukhy Helmy · CIK 0001752968 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Isabella Eltoukhy 2018 Irrevocable Trust

Disclosed balance after: 59,813

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.

F12 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $63.86 to $64.85, 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: 0001628280-19-004663 · wf-form4_155614977424576.xml · nonDerivative · entry 10

Eltoukhy Helmy · CIK 0001752968 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Genevieve Eltoukhy 2018 Irrevocable Trust

Disclosed balance after: 43,780

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.

F11 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $67.90 to $68.65, 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: 0001628280-19-004663 · wf-form4_155614977424576.xml · nonDerivative · entry 9

Eltoukhy Helmy · CIK 0001752968 · Director · Chief Executive Officer

10b5-1 filing: Not disclosed

Ownership: Indirect · Shares held by Genevieve Eltoukhy 2018 Irrevocable Trust

Disclosed balance after: 45,195

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.

F10 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $66.80 to $67.79, 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.