Walker Karen

SEC source: 0001642519-26-000001 · wk-form4_1779394106.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 55,433

F1 · balance_after: The total reported in column 5 includes: 26,470 newly granted restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001642519-25-000004 · wk-form4_1752609681.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 28,963

F1 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $18.83 to $19.33 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F2 · balance_after: The total reported in column 5 includes: 8,298 granted restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001517375-25-000097 · wk-form4_1748030942.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,963

F1 · balance_after: The total reported in column 5 includes: 8,298 newly granted restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001517375-25-000073 · wk-form4_1744747308.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 25,665

F1 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.12 to $19.87 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F2 · balance_after: The total reported in column 5 includes: 5,612 granted restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001517375-25-000004 · wk-form4_1736888490.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 30,665

F1 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $29.93 to $30.53 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F2 · balance_after: The total reported in column 5 includes: 5,612 granted restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001517375-24-000144 · wk-form4_1734382911.xml · nonDerivative · entry 2

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 35,665

F3 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $35.04 to $35.38 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F2 · balance_after: The total reported in column 5 includes: 5,612 granted restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001517375-24-000144 · wk-form4_1734382911.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 35,965

F1 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $33.88 to $34.66 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F2 · balance_after: The total reported in column 5 includes: 5,612 granted restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0000059478-24-000278 · wk-form4_1732138184.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,248.823

SEC source: 0001517375-24-000104 · wk-form4_1723149355.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,665

F1 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.12 to $31.24 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F2 · balance_after: The total reported in column 5 includes: 5,612 granted restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001517375-24-000081 · wk-form4_1716501655.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,165

F1 · balance_after: The total reported in column 5 includes: 5,612 granted restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001517375-24-000029 · wk-form4_1709677054.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,553

F1 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.13 to $64.31 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F2 · balance_after: The total reported in column 5 includes: 3,895 granted restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0000059478-23-000314 · wk-form4_1700602310.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,909

SEC source: 0001517375-23-000101 · wf-form4_169394425650252.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 42,053

F1 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $52.88 to $52.96 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F2 · balance_after: The total reported in column 5 includes: 3,895 granted restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001517375-23-000099 · wf-form4_169169765655390.xml · nonDerivative · entry 3

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · see footnote

Disclosed balance after: 3,000

F1 · ownership.nature: This amount represents: (i) 1,000 shares of Issuer Class A Common Stock held by the Michael Alexander Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees; (ii) 1,000 shares of Issuer Class A Common Stock held by the Alexander Brooke Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees; and (iii) 1,000 shares of Issuer Class A Common Stock held by the Cameron Richard Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees.

SEC source: 0001517375-23-000099 · wf-form4_169169765655390.xml · nonDerivative · entry 2

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · see footnote

Disclosed balance after: 3,987

F1 · ownership.nature: This amount represents: (i) 1,000 shares of Issuer Class A Common Stock held by the Michael Alexander Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees; (ii) 1,000 shares of Issuer Class A Common Stock held by the Alexander Brooke Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees; and (iii) 1,000 shares of Issuer Class A Common Stock held by the Cameron Richard Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees.

SEC source: 0001517375-23-000099 · wf-form4_169169765655390.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · see footnote

Disclosed balance after: 4,973

F1 · ownership.nature: This amount represents: (i) 1,000 shares of Issuer Class A Common Stock held by the Michael Alexander Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees; (ii) 1,000 shares of Issuer Class A Common Stock held by the Alexander Brooke Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees; and (iii) 1,000 shares of Issuer Class A Common Stock held by the Cameron Richard Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees.

SEC source: 0001517375-23-000076 · wf-form4_168495870033077.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,053

F1 · balance_after: The total reported in column 5 includes: 3,895 newly granted restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001517375-23-000029 · wf-form4_167848220645445.xml · nonDerivative · entry 3

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · see footnote

Disclosed balance after: 5,959

F4 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.51 to $64.60 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F5 · ownership.nature: Following the transactions reported on this form, this amount represents: (i) 1,987 shares of Issuer Class A Common Stock held by the Michael Alexander Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees; (ii) 1,986 shares of Issuer Class A Common Stock held by the Alexander Brooke Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees; and (iii) 1,986 shares of Issuer Class A Common Stock held by the Cameron Richard Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees.

SEC source: 0001517375-23-000029 · wf-form4_167848220645445.xml · nonDerivative · entry 2

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,158

F3 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $64.75 to $64.99 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F2 · balance_after: The total reported in column 5 includes: 4,164 of restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001517375-23-000029 · wf-form4_167848220645445.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 44,258

F1 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $63.20 to $63.88 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F2 · balance_after: The total reported in column 5 includes: 4,164 of restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0000059478-22-000268 · wf-form4_166915646583226.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,514

SEC source: 0001517375-22-000051 · wf-form4_166906453440331.xml · nonDerivative · entry 5

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 50,158

F6 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $61.02 to $61.29 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F5 · balance_after: The total reported in column 5 includes: 4,164 of restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001517375-22-000051 · wf-form4_166906453440331.xml · nonDerivative · entry 4

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,358

F4 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $60.02 to $60.98 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F5 · balance_after: The total reported in column 5 includes: 4,164 of restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001517375-22-000051 · wf-form4_166906453440331.xml · nonDerivative · entry 3

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · see footnote

Disclosed balance after: 11,959

F3 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $62.00 to $62.11 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F2 · ownership.nature: Following the transactions reported on this form, this amount represents: (i) 3,987 shares of Issuer Class A Common Stock held by the Michael Alexander Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees; (ii) 3,986 shares of Issuer Class A Common Stock held by the Alexander Brooke Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees; and (iii) 3,986 shares of Issuer Class A Common Stock held by the Cameron Richard Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees.

SEC source: 0001517375-22-000051 · wf-form4_166906453440331.xml · nonDerivative · entry 2

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · see footnote

Disclosed balance after: 15,946

F2 · ownership.nature: Following the transactions reported on this form, this amount represents: (i) 3,987 shares of Issuer Class A Common Stock held by the Michael Alexander Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees; (ii) 3,986 shares of Issuer Class A Common Stock held by the Alexander Brooke Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees; and (iii) 3,986 shares of Issuer Class A Common Stock held by the Cameron Richard Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees.

SEC source: 0001517375-22-000051 · wf-form4_166906453440331.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · see footnote

Disclosed balance after: 19,933

F1 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $61.87 to $61.88 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F2 · ownership.nature: Following the transactions reported on this form, this amount represents: (i) 3,987 shares of Issuer Class A Common Stock held by the Michael Alexander Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees; (ii) 3,986 shares of Issuer Class A Common Stock held by the Alexander Brooke Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees; and (iii) 3,986 shares of Issuer Class A Common Stock held by the Cameron Richard Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees.

SEC source: 0001562180-22-006381 · primarydocument.xml · nonDerivative · entry 2

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 55,158

F3 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $58.95 to $58.98 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F2 · balance_after: The total reported in column 5 includes: 4,164 of restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001562180-22-006381 · primarydocument.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 55,558

F1 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $58.95 to $59.30 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F2 · balance_after: The total reported in column 5 includes: 4,164 of restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001562180-22-004463 · primarydocument.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 64,058

F1 · balance_after: The total reported in column 5 includes: (1) 4,164 newly granted restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant; and (2) 5,000 reported RSUs which vest in 2 equal monthly installments beginning on June 16, 2022. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0000059478-21-000236 · wf-form4_163718755214286.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,950

SEC source: 0001562180-21-006946 · primarydocument.xml · nonDerivative · entry 2

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 59,894

F3 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $131.91 to $132.55 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F2 · balance_after: The total reported in column 5 includes: (1) 2,394 reported restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant; and (2) 22,500 reported RSUs which vest in 9 equal monthly installments beginning on November 16, 2021. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001562180-21-006946 · primarydocument.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 64,644

F1 · price: The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $130.88 to $131.82 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to 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.

F2 · balance_after: The total reported in column 5 includes: (1) 2,394 reported restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant; and (2) 22,500 reported RSUs which vest in 9 equal monthly installments beginning on November 16, 2021. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001562180-21-006379 · primarydocument.xml · nonDerivative · entry 4

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 23,920

F5 · ownership.nature: Following the transactions reported herein, this represents (i) 7,974 shares of Issuer Class A Common Stock held by the Michael Alexander Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees; (ii) 7,973 shares of Issuer Class A Common Stock held by the Alexander Brooke Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees; and (iii) 7,973 shares of Issuer Class A Common Stock held by the Cameron Richard Walker 2021 Trust, of which Ms. Walker and her spouse serve as the trustees.

SEC source: 0001562180-21-006379 · primarydocument.xml · nonDerivative · entry 3

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 74,894

F4 · kind: On October 5, 2021, the reporting person made a bona fide gift of 7,973 shares of Issuer Common Stock to Cameron Richard Walker 2021 Trust. This transaction is being reported on a voluntary basis pursuant to General Instruction 4(a) of SEC Form 4.

F2 · balance_after: The total reported in column 5 includes: (1) 2,394 reported restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant; and (2) 25,000 reported RSUs which vest in 10 equal monthly installments beginning on October 16, 2021. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001562180-21-006379 · primarydocument.xml · nonDerivative · entry 2

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 82,867

F3 · kind: On October 5, 2021, the reporting person made a bona fide gift of 7,973 shares of Issuer Common Stock to the Alexandra Brooke Walker 2021 Trust. This transaction is being reported on a voluntary basis pursuant to General Instruction 4(a) of SEC Form 4.

F2 · balance_after: The total reported in column 5 includes: (1) 2,394 reported restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant; and (2) 25,000 reported RSUs which vest in 10 equal monthly installments beginning on October 16, 2021. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001562180-21-006379 · primarydocument.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 90,840

F1 · kind: On October 5, 2021, the reporting person made a bona fide gift of 7,974 shares of Issuer Common Stock to the Michael Alexander Walker 2021 Trust. This transaction is being reported on a voluntary basis pursuant to General Instruction 4(a) of SEC Form 4.

F2 · balance_after: The total reported in column 5 includes: (1) 2,394 reported restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant; and (2) 25,000 reported RSUs which vest in 10 equal monthly installments beginning on October 16, 2021. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0001562180-21-003790 · primarydocument.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 98,814

F1 · balance_after: The total reported in column 5 includes: (1) 2,394 newly granted restricted stock units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant; and (2) 35,000 reported RSUs which vest in 14 equal monthly installments beginning on June 16, 2021. Each RSU represents the contingent right to receive one share of Class A Common Stock of the Issuer and does not expire.

SEC source: 0000059478-20-000161 · wf-form4_160575242550974.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,209

SEC source: 0001562180-20-004600 · primarydocument.xml · derivative · entry 2

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 2,500 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: Each Restricted Stock Unit ("RSU") represents the contingent right to receive one share of Class A Common Stock of the Issuer.

F2 · derivative.exercise_date: The reporting person previously reported RSUs inTable II of Form 4. The total reported in Column 5 of Table I includes 62,500 reported RSUs which vest in 25 monthly installments beginning on July 16, 2020, and do not expire.

F2 · derivative.expiration_date: The reporting person previously reported RSUs inTable II of Form 4. The total reported in Column 5 of Table I includes 62,500 reported RSUs which vest in 25 monthly installments beginning on July 16, 2020, and do not expire.

SEC source: 0001562180-20-004600 · primarydocument.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 96,420

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: Each Restricted Stock Unit ("RSU") represents the contingent right to receive one share of Class A Common Stock of the Issuer.

F2 · balance_after: The reporting person previously reported RSUs inTable II of Form 4. The total reported in Column 5 of Table I includes 62,500 reported RSUs which vest in 25 monthly installments beginning on July 16, 2020, and do not expire.

SEC source: 0001562180-20-003994 · primarydocument.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,420

F1 · shares: Represents an award of Restricted Stock Units ("RSUs"), which will vest on the earlier of (i) the day immediately preceding the date of the first annual meeting of the Issuer's stockholders following the date of the grant and (ii) the first anniversary of the date of grant. Each RSU represents a contingent right to receive one share of Class A Common Stock of the Issuer and has no expiration date.

SEC source: 0001562180-20-003692 · primarydocument.xml · derivative · entry 2

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 65,000

Underlying: Class A Common Stock · 2,500 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: Each Restricted Stock Unit ("RSU") represents the contingent right to receive one share of Class A Common Stock of the Issuer.

F2 · derivative.exercise_date: The RSUs vest in 26 monthly installments beginning on June 16, 2020 and have no expiration date.

F2 · derivative.expiration_date: The RSUs vest in 26 monthly installments beginning on June 16, 2020 and have no expiration date.

SEC source: 0001562180-20-003692 · primarydocument.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,000

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: Each Restricted Stock Unit ("RSU") represents the contingent right to receive one share of Class A Common Stock of the Issuer.

SEC source: 0001562180-20-003049 · primarydocument.xml · derivative · entry 2

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 67,500

Underlying: Class A Common Stock · 2,500 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: Each Restricted Stock Unit ("RSU") represents the contingent right to receive one share of Class A Common Stock of the Issuer.

F2 · derivative.exercise_date: The RSUs vest in 27 monthly installments beginning on May 16, 2020 and have no expiration date.

F2 · derivative.expiration_date: The RSUs vest in 27 monthly installments beginning on May 16, 2020 and have no expiration date.

SEC source: 0001562180-20-003049 · primarydocument.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,500

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: Each Restricted Stock Unit ("RSU") represents the contingent right to receive one share of Class A Common Stock of the Issuer.

SEC source: 0001562180-20-002583 · primarydocument.xml · derivative · entry 2

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 70,000

Underlying: Class A Common Stock · 2,500 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: Each Restricted Stock Unit ("RSU") represents the contingent right to receive one share of Class A Common Stock of the Issuer.

F2 · derivative.exercise_date: The RSUs vest in 28 monthly installments beginning on April 16, 2020 and have no expiration date.

F2 · derivative.expiration_date: The RSUs vest in 28 monthly installments beginning on April 16, 2020 and have no expiration date.

SEC source: 0001562180-20-002583 · primarydocument.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,000

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: Each Restricted Stock Unit ("RSU") represents the contingent right to receive one share of Class A Common Stock of the Issuer.

SEC source: 0001562180-20-001307 · primarydocument.xml · derivative · entry 2

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 72,500

Underlying: Class A Common Stock · 2,500 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: Each Restricted Stock Unit ("RSU") represents the contingent right to receive one share of Class A Common Stock of the Issuer.

F2 · derivative.exercise_date: The RSUs vest in 29 monthly installments beginning on March 16, 2020 and have no expiration date.

F2 · derivative.expiration_date: The RSUs vest in 29 monthly installments beginning on March 16, 2020 and have no expiration date.

SEC source: 0001562180-20-001307 · primarydocument.xml · nonDerivative · entry 1

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,500

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: Each Restricted Stock Unit ("RSU") represents the contingent right to receive one share of Class A Common Stock of the Issuer.

SEC source: 0001562180-20-000412 · primarydocument.xml · derivative · entry 2

Walker Karen · CIK 0001642519 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 75,000

Underlying: Class A Common Stock · 2,500 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: Each Restricted Stock Unit ("RSU") represents the contingent right to receive one share of Class A Common Stock of the Issuer.

F2 · derivative.exercise_date: The RSUs vest in 30 monthly installments beginning on February 16, 2020 and have no expiration date.

F2 · derivative.expiration_date: The RSUs vest in 30 monthly installments beginning on February 16, 2020 and have no expiration date.