HAYDEN JEREMY B.

SEC source: 0001193125-26-296597 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 357,037

F1 · shares: Reflects shares of the Issuer's common stock, par value $0.001 per share ("Common Stock"), sold to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units ("RSUs").

F2 · price: Reflects the weighted average price at which the shares of Common Stock were sold. The shares were sold in multiple transactions at prices ranging from $5.37 to $5.62, 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 range set forth in this footnote.

F3 · balance_after: Includes (i) 100,015 shares of Common Stock, and (ii) 257,022 shares of Common Stock which shall be acquired upon the vesting and settlement of RSUs that have not yet vested.

SEC source: 0001193125-26-149856 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 369,770

F1 · shares: Reflects shares of the Issuer's common stock, par value $0.001 per share ("Common Stock"), sold to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units ("RSUs").

F2 · price: Reflects the weighted average price at which the shares of Common Stock were sold. The shares were sold in multiple transactions at prices ranging from $3.43 to $3.58, 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 range set forth in this footnote.

F3 · balance_after: Includes (i) 87,274 shares of Common Stock, and (ii) 282,496 shares of Common Stock which shall be acquired upon the vesting and settlement of RSUs that have not yet vested.

SEC source: 0001193125-26-039559 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 383,531

F1 · shares: Reflects a grant of restricted stock units ("RSUs") made to the Reporting Person under the Issuer's 2021 Incentive Award Plan. The RSUs vest in 16 equal quarterly installments commencing March 31, 2026 and continuing through December 31, 2029, subject to the Reporting Person's continued service to the Issuer through each vesting date. Each RSU represents a contingent right to receive one share of the Issuer's common stock, par value $0.001 per share ("Common Stock"). The number of RSUs granted is equal to $750,000 divided by the closing price of the Common Stock on the grant date, which was February 3, 2026.

F2 · balance_after: Includes (i) 75,562 shares of Common Stock, and (ii) 307,969 shares of Common Stock which shall be acquired upon the vesting and settlement of RSUs that have not yet vested.

SEC source: 0001193125-26-018122 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 267,611

F1 · shares: Reflects shares of the Issuer's common stock, par value $0.001 per share ("common stock"), sold to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units.

F2 · price: Reflects the weighted average price at which the shares of common stock were sold. The shares were sold in multiple transactions at prices ranging from $6.44 to $6.69, 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 range set forth in this footnote.

F3 · balance_after: Includes (i) 75,562 shares of common stock, and (ii) 192,049 shares of common stock which shall be acquired upon the vesting and settlement of restricted stock units ("RSUs") that have not yet vested.

F4 · balance_after: The Reporting Person previously reported a grant of 12,000 RSUs on a Form 4 filed on February 11, 2022 (which was subsequently included under Table 1 on a Form 4 filed on January 5, 2023) and a grant of 45,100 RSUs on a Form 4 filed on March 21, 2023, which were awarded on February 9, 2022 and March 16, 2023, respectively. Of these RSU grants, 39,825 shares were inadvertently excluded from the Reporting Person's beneficially owned shares. The reported balance includes these previously excluded shares. Furthermore, the Reporting Person's Form 4 filed on February 16, 2024 inadvertently included under Column 5 of Table I 11,326 shares of common stock underlying the Reporting Person's stock options that were to vest within 60 days of the date of such filing. The reported balance on this Form 4 excludes the number of shares underlying such stock options.

SEC source: 0001193125-26-004999 · ownership.xml · nonDerivative · entry 2

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 245,420

F1 · shares: Reflects shares of the Issuer's common stock, par value $0.001 per share, sold to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units.

F3 · price: Reflects the weighted average price at which the shares of Common Stock were sold. The shares were sold in multiple transactions at prices ranging from $7.39 to $7.67, 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 range set forth in this footnote.

SEC source: 0001193125-26-004999 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 247,205

F1 · shares: Reflects shares of the Issuer's common stock, par value $0.001 per share, sold to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units.

F2 · price: Reflects the weighted average price at which the shares of Common Stock were sold. The shares were sold in multiple transactions at prices ranging from $7.71 to $7.97, 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 range set forth in this footnote.

SEC source: 0001193125-25-300939 · ownership.xml · derivative · entry 5

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 8,000

Underlying: Common Stock · 7,290 shares

Expires 2030-07-28

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 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person in connection with, and pursuant to, the terms of a marital separation agreement previously entered into between the Reporting Person and his former spouse. The Reporting Person's spouse will receive all proceeds from the shares sold in the transactions.

F4 · derivative.exercise_date: The options are fully vested and exercisable.

SEC source: 0001193125-25-300939 · ownership.xml · derivative · entry 4

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 40,000

Underlying: Common Stock · 37,560 shares

Expires 2030-05-10

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 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person in connection with, and pursuant to, the terms of a marital separation agreement previously entered into between the Reporting Person and his former spouse. The Reporting Person's spouse will receive all proceeds from the shares sold in the transactions.

F4 · derivative.exercise_date: The options are fully vested and exercisable.

SEC source: 0001193125-25-300939 · ownership.xml · nonDerivative · entry 3

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 256,590

F1 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person in connection with, and pursuant to, the terms of a marital separation agreement previously entered into between the Reporting Person and his former spouse. The Reporting Person's spouse will receive all proceeds from the shares sold in the transactions.

F3 · price: Reflects the weighted average price at which the shares of Common Stock were sold. The shares were sold in multiple transactions at prices ranging from $8.00 to $8.22, 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 range set forth in this footnote.

SEC source: 0001193125-25-300939 · ownership.xml · nonDerivative · entry 2

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 301,440

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 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person in connection with, and pursuant to, the terms of a marital separation agreement previously entered into between the Reporting Person and his former spouse. The Reporting Person's spouse will receive all proceeds from the shares sold in the transactions.

F2 · shares: Reflects the exercise of stock options awarded to the Reporting Person under the Issuer's equity incentive plan.

SEC source: 0001193125-25-300939 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 294,150

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 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person in connection with, and pursuant to, the terms of a marital separation agreement previously entered into between the Reporting Person and his former spouse. The Reporting Person's spouse will receive all proceeds from the shares sold in the transactions.

F2 · shares: Reflects the exercise of stock options awarded to the Reporting Person under the Issuer's equity incentive plan.

SEC source: 0001193125-25-283548 · ownership.xml · derivative · entry 5

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 710 shares

Expires 2030-07-28

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 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person in connection with, and pursuant to, the terms of a marital separation agreement previously entered into between the Reporting Person and his former spouse. The Reporting Person's spouse will receive all proceeds from the shares sold in the transactions.

F4 · derivative.exercise_date: The options are fully vested and exercisable.

SEC source: 0001193125-25-283548 · ownership.xml · derivative · entry 4

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 2,440 shares

Expires 2030-05-10

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 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person in connection with, and pursuant to, the terms of a marital separation agreement previously entered into between the Reporting Person and his former spouse. The Reporting Person's spouse will receive all proceeds from the shares sold in the transactions.

F4 · derivative.exercise_date: The options are fully vested and exercisable.

SEC source: 0001193125-25-283548 · ownership.xml · nonDerivative · entry 3

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 256,590

F1 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person in connection with, and pursuant to, the terms of a marital separation agreement previously entered into between the Reporting Person and his former spouse. The Reporting Person's spouse will receive all proceeds from the shares sold in the transactions.

F3 · price: Reflects the weighted average price at which the shares of Common Stock were sold. The shares were sold in multiple transactions at prices ranging from $8.00 to $8.06, 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 range set forth in this footnote.

SEC source: 0001193125-25-283548 · ownership.xml · nonDerivative · entry 2

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 259,740

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 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person in connection with, and pursuant to, the terms of a marital separation agreement previously entered into between the Reporting Person and his former spouse. The Reporting Person's spouse will receive all proceeds from the shares sold in the transactions.

F2 · shares: Reflects the exercise of stock options awarded to the Reporting Person under the Issuer's equity incentive plan.

SEC source: 0001193125-25-283548 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 259,030

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 · kind: The transactions reported in the Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person in connection with, and pursuant to, the terms of a marital separation agreement previously entered into between the Reporting Person and his former spouse. The Reporting Person's spouse will receive all proceeds from the shares sold in the transactions.

F2 · shares: Reflects the exercise of stock options awarded to the Reporting Person under the Issuer's equity incentive plan.

SEC source: 0001193125-25-230556 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 256,590

F1 · shares: Reflects shares of the Issuer's common stock, par value $0.001 per share, sold to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units.

SEC source: 0000950170-25-094429 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 266,321

F1 · shares: Reflects shares of the Issuer's common stock, par value $0.001 per share, sold to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units.

SEC source: 0000950170-25-050869 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 275,481

F1 · shares: Reflects shares of the Issuer's common stock, par value $0.001 per share, sold to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units.

SEC source: 0000950170-25-039082 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 284,876

F1 · shares: Reflects a grant of restricted stock units ("RSUs") made to the Reporting Person under the Issuer's 2021 Incentive Award Plan. The RSUs vest in 16 equal quarterly installments commencing March 31, 2025 and continuing through December 31, 2028, subject to the Reporting Person's continued service to the Issuer through each vesting date. Each RSU represents a contingent right to receive one share of the Issuer's common stock, par value $0.001 per share ("Common Stock"). The number of RSUs granted is equal to $390,000 divided by the closing price of the Common Stock on the grant date, which was March 11, 2025. The RSUs have no expiration date.

SEC source: 0000950170-25-007513 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 145,091

F1 · shares: Reflects shares of the Issuer's common stock, par value $0.001 per share ("Common Stock"), sold to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units.

F2 · price: Reflects the weighted average price at which the shares of Common Stock were sold. The shares were sold in multiple transactions at prices ranging from $2.68 to $2.82, 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 range set forth in this footnote.

SEC source: 0000950170-25-003725 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 152,013

F1 · shares: Reflects shares of the Issuer's common stock, par value $0.001 per share, sold to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units.

SEC source: 0000950170-25-002532 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 153,823

F1 · shares: Reflects shares of the Issuer's common stock, par value $0.001 per share ("Common Stock"), sold to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units.

F2 · price: Reflects the weighted average price at which the shares of Common Stock were sold. The shares were sold in multiple transactions at prices ranging from $3.465 to $3.58, 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 range set forth in this footnote.

SEC source: 0000950170-24-112708 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 158,687

F1 · shares: Reflects shares of the Issuer's common stock, par value $0.001 per share, sold to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units.

SEC source: 0000950170-24-081731 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 163,565

F1 · shares: Reflects shares of the Issuer's common stock, par value $0.001 per share, sold to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units.

SEC source: 0000950170-24-041988 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 168,620

F1 · shares: Reflects shares of the Issuer's common stock, par value $0.001 per share, sold to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units.

SEC source: 0000950170-24-016704 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 173,513

F1 · shares: Reflects a grant of restricted stock units ("RSUs") made to the Reporting Person under the Issuer's 2021 Incentive Award Plan. The RSUs vest in 16 equal quarterly installments commencing March 31, 2024 and continuing through December 31, 2027, subject to the Reporting Person's continued service to the Issuer through each vesting date. Each RSU represents a contingent right to receive one share of the Issuer's common stock, par value $0.001 per share ("Common Stock"). The number of RSUs granted is equal to $650,000 divided by the closing price of the Common Stock on the grant date, which was February 14, 2024. The RSUs have no expiration date.

F2 · balance_after: Includes 11,326 shares of Common Stock issuable upon the Reporting Person's exercise of options that shall vest within 60 days of the date hereof subject to the Reporting Person's continued service to the Issuer through such vesting date.

SEC source: 0000950170-24-005827 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,318

F1 · shares: Reflects shares of the Issuer's common stock, par value $0.001 per share, sold to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units.

SEC source: 0000950170-24-002608 · ownership.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,856

F1 · shares: Reflects shares of the Issuer's common stock, par value $0.001 per share ("Common Stock"), sold to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units ("RSUs").

F2 · balance_after: Includes (i) 3,000 shares of Common Stock issued in connection with the vesting of RSUs on January 1, 2024, and (ii) 11,275 shares of Common Stock that will be issued in connection with the vesting of RSUs on January 15, 2024, subject to the Reporting Person's continued service through such date.

SEC source: 0000899243-23-009245 · doc4.xml · derivative · entry 2

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 57,700

Underlying: Common Stock · 57,700 shares

Expires 2033-03-16

F3 · shares: Reflects a grant of stock options ("Options") made to the Reporting Person under the 2021 Plan. The Options vest and become exercisable in 48 equal monthly installments with the first installment vesting commencing on January 1, 2023 through January 1, 2027, subject to the Reporting Person's continued service to the Issuer through each vesting date.

F3 · derivative.exercise_date: Reflects a grant of stock options ("Options") made to the Reporting Person under the 2021 Plan. The Options vest and become exercisable in 48 equal monthly installments with the first installment vesting commencing on January 1, 2023 through January 1, 2027, subject to the Reporting Person's continued service to the Issuer through each vesting date.

SEC source: 0000899243-23-009245 · doc4.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,808

F1 · shares: Reflects a grant of restricted stock units ("RSUs") made to the Reporting Person under the Issuer's 2021 Incentive Award Plan (the "2021 Plan"). The RSUs vest in four equal annual installments from January 15, 2024 through January 15, 2027, subject to the Reporting Person's continued service to the Issuer through each vesting date. Each RSU represents a contingent right to receive one share of the Issuer's common stock, par value $0.001 per share ("Common Stock").

F2 · balance_after: Reflects shares of Common Stock beneficially owned by the Reporting Person as of the date hereof, excluding RSUs that do not vest within 60 days of this filing pursuant to Rule 13d-3(d)(1)(i).

SEC source: 0000899243-23-000825 · doc4.xml · nonDerivative · entry 2

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,808

F3 · shares: Reflects shares of Common Stock sold to cover the Reporting Person's tax liability in connection with the vesting of RSUs.

F4 · price: Reflects the weighted average price at which the shares were sold. The shares were sold in multiple transactions at prices ranging from $12.16 to $12.61, 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 range set forth in this footnote.

SEC source: 0000899243-23-000825 · doc4.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 3,000

F1 · shares: Reflects a grant of restricted stock units ("RSUs") made to the Reporting Person on February 9, 2022 under the Issuer's 2021 Incentive Award Plan (such grant, the "2022 RSU Grant"), as reported in Table II on the Reporting Person's Form 4 filed with the Securities and Exchange Commission on February 11, 2022. Of the RSUs awarded to the Reporting Person under the 2022 RSU Grant, 25% vested on January 1, 2023, and an additional 25% vest on each of January 1, 2024, 2025, and 2026. Each RSU represents a contingent right to receive one share of the Issuer's common stock, par value $0.001 per share ("Common Stock"). The RSUs have no expiration date.

F2 · balance_after: Includes 3,000 shares of Common Stock issued in connection with the January 1, 2023 vesting of the 2022 RSU Grant.

SEC source: 0000899243-22-005827 · doc4.xml · derivative · entry 2

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,200

Underlying: Common Stock · 48,200 shares

Expires 2032-02-09

F3 · derivative.exercise_date: The options vest and become exercisable in 48 substantially equal monthly installments with the first installment vesting on February 1, 2022.

SEC source: 0000899243-22-005827 · doc4.xml · derivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · Chief Legal Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 12,000

Underlying: Common Stock · 12,000 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Unit represents a contingent right to receive one share of Issuer common stock.

F2 · derivative.exercise_date: The Restricted Stock Units vest as to 25% on each of January 1, 2023; January 1, 2024; January 1, 2025 and January 1, 2026. The Restricted Stock Units have no expiration date.

F2 · derivative.expiration_date: The Restricted Stock Units vest as to 25% on each of January 1, 2023; January 1, 2024; January 1, 2025 and January 1, 2026. The Restricted Stock Units have no expiration date.

SEC source: 0001013606-19-000174 · wf-form4_157048772825336.xml · nonDerivative · entry 2

HAYDEN JEREMY B. · CIK 0001650737 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,040

F2 · shares: Shares withheld on October 3, 2019 to satisfy statutory minimum tax withholding obligations related to shares vested on October 3, 2019.

SEC source: 0001013606-19-000174 · wf-form4_157048772825336.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 36,250

F1 · shares: This award was originally reported on a Form 4 filed with the Securities and Exchange Commission on April 3, 2019. 100% of the time-based restricted stock unit award vested pursuant to the terms of this award.

SEC source: 0001013606-19-000166 · wf-form4_156996172467635.xml · derivative · entry 2

HAYDEN JEREMY B. · CIK 0001650737 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,868

Underlying: Common Stock · 7,868 shares

Expires 2026-09-10

F3 · shares: The options vest in three equal annual installments over a three-year period commencing on September 10, 2019.

F2 · price: The issuer cancelled, pursuant to the issuer's option exchange program which expired on September 9, 2019, an option for 23,601 shares of common stock granted to the reporting person on August 21, 2017. In exchange, the reporting person received a new stock option, for 7,868 shares, having an exercise price of $4.71 per share, which is equal to the closing price per share of the common stock on the NASDAQ Global Market on September 10, 2019.

SEC source: 0001013606-19-000166 · wf-form4_156996172467635.xml · derivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 23,601 shares

Expires 2027-08-21

F1 · shares: Twenty-five percent of the options vested upon one year of service and the remaining balance continued to vest in equal monthly installments thereafter.

F2 · price: The issuer cancelled, pursuant to the issuer's option exchange program which expired on September 9, 2019, an option for 23,601 shares of common stock granted to the reporting person on August 21, 2017. In exchange, the reporting person received a new stock option, for 7,868 shares, having an exercise price of $4.71 per share, which is equal to the closing price per share of the common stock on the NASDAQ Global Market on September 10, 2019.

SEC source: 0001013606-19-000139 · wf-form4_156512625294038.xml · derivative · entry 2

HAYDEN JEREMY B. · CIK 0001650737 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 38,000

Underlying: Common Stock · 38,000 shares

Expires 2029-08-05

F2 · shares: Options vest ratably over thirty-six months.

SEC source: 0001013606-19-000139 · wf-form4_156512625294038.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 36,250

F1 · shares: Performance restricted stock unit award based on predetermined goals.

SEC source: 0001013606-19-000075 · wf-form4_155432248275837.xml · nonDerivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,250

F1 · shares: 100% of the time-based restricted stock unit award shall vest on October 3, 2019 and shall settle in shares of common stock.

SEC source: 0001013606-19-000018 · wf-form4_154647787146516.xml · derivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 216,449

Underlying: Common Stock · 216,449 shares

Expires 2028-12-30

F1 · shares: 100% of the option award shall vest on December 30, 2019.

SEC source: 0001209191-17-019942 · doc4.xml · derivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · General Counsel & VP of BD

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,000

Underlying: Common Stock · 42,000 shares

Expires 2027-03-08

F1 · derivative.exercise_date: Option shares shall vest and become exercisable over four (4) years in forty-eight consecutive monthly installments.

SEC source: 0001209191-17-021453 · doc4a.xml · derivative · entry 1

HAYDEN JEREMY B. · CIK 0001650737 · General Counsel & VP of BD

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,100

Underlying: Common Stock · 31,100 shares

Expires 2027-03-08

F1 · derivative.exercise_date: Option shares shall vest and become exercisable over four (4) years in forty-eight consecutive monthly installments.