Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

  NAMES OF REPORTING PERSONS

  Khosla Ventures IV, LP

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

  (a)  ☐        (b)  ☒ (1)

  SEC USE ONLY

  CITIZENSHIP OR PLACE OF ORGANIZATION

  Delaware, United States of America

NUMBER OF

SHARES

 BENEFICIALLY 

OWNED BY

EACH

REPORTING

PERSON

WITH:

  SOLE VOTING POWER

  0

  SHARED VOTING POWER

  8,362,052 (2)

  SOLE DISPOSITIVE POWER

  0

  SHARED DISPOSITIVE POWER

  8,362,052(2)

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

  8,362,052 (2)

  CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

  ☐

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

  1.4%(3)

  TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

  PN

This statement on Schedule 13G is filed by Khosla Ventures IV, LP (“KV IV”), Khosla Ventures IV (CF), LP (“KV IV (CF)”), Khosla Ventures Associates IV, LLC (“KVA IV”), VK Services, LLC (“VK Services”) and Vinod Khosla (“Khosla”, together with KV IV, KV IV (CF), KVA IV and VK Services collectively, the “Reporting Persons”). The Reporting Persons expressly disclaim status as a “group” for purposes of this Schedule 13G.

All of the shares are owned by KV IV. The general partner of KV IV is KVA IV. VK Services is the sole manager of KVA IV. Khosla is the managing member of VK Services. Each of Khosla, VK Services and KVA IV possesses power to direct the voting and disposition of the shares owned by KV IV, and each of Khosla, VK Services and KVA IV may be deemed to have indirect beneficial ownership of such shares.

The percentages set forth on the cover sheets are calculated based on 612,612,711 shares of Common Stock outstanding as of November 3, 2021 as set forth as set forth in the Issuer’s Quarterly Report on Form 10-Q as filed with the Securities and Exchange Commission on November 10, 2021.

  NAMES OF REPORTING PERSONS

  Khosla Ventures IV (CF), LP.

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

  (a)  ☐        (b)  ☒ (1)

  SEC USE ONLY

  CITIZENSHIP OR PLACE OF ORGANIZATION

  Delaware, United States of America

NUMBER OF

SHARES

 BENEFICIALLY 

OWNED BY

EACH

REPORTING

PERSON

WITH:

  SOLE VOTING POWER

  0

  SHARED VOTING POWER

  534,599 (2)

  SOLE DISPOSITIVE POWER

  0

  SHARED DISPOSITIVE POWER

  534,599 (2)

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

  534,599 (2)

  CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

  ☐

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

  0.1%(3)

  TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

  PN

This statement on Schedule 13G is filed by the Reporting Persons. The Reporting Persons expressly disclaim status as a “group” for purposes of this Schedule 13G.

All of the shares are owned by KV IV (CF). The general partner of KV IV (CF) is KVA IV. VK Services is the sole manager of KVA IV. Khosla is the managing member of VK Services. Each of Khosla, VK Services and KVA IV possesses power to direct the voting and disposition of the shares owned by KV IV (CF), and each of Khosla, VK Services and KVA IV may be deemed to have indirect beneficial ownership of such shares.

The percentages set forth on the cover sheets are calculated based on 612,612,711 shares of Common Stock outstanding as of November 3, 2021 as set forth as set forth in the Issuer’s Quarterly Report on Form 10-Q as filed with the Securities and Exchange Commission on November 10, 2021.

  NAMES OF REPORTING PERSONS

  Khosla Ventures Associates IV, LLC

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

  (a)  ☐        (b)  ☒ (1)

  SEC USE ONLY

  CITIZENSHIP OR PLACE OF ORGANIZATION

  Delaware, United States of America

NUMBER OF

SHARES

 BENEFICIALLY 

OWNED BY

EACH

REPORTING

PERSON

WITH:

  SOLE VOTING POWER

  0

  SHARED VOTING POWER

  8,896,651(2)

  SOLE DISPOSITIVE POWER

  0

  SHARED DISPOSITIVE POWER

  8,896,651 (2)

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

  8,896,651 (2)

  CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

  ☐

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

  1.5%(3)

  TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

  OO

This statement on Schedule 13G is filed by the Reporting Persons. The Reporting Persons expressly disclaim status as a “group” for purposes of this Schedule 13G.

All of the shares beneficially owned by KVA IV are comprised of Common Stock held by KV IV and KV IV (CF). The general partner of KV IV and KV IV (CF) is KVA IV. VK Services is the sole manager of KVA IV. Khosla is the managing member of VK Services. Each of Khosla, VK Services and KVA IV possesses power to direct the voting and disposition of the shares owned by KV IV and KV IV (CF), and each of Khosla, VK Services and KVA IV may be deemed to have indirect beneficial ownership of such shares. KVA IV holds no shares of the Issuer directly.

The percentages set forth on the cover sheets are calculated based on 612,612,711 shares of Common Stock outstanding as of November 3, 2021 as set forth as set forth in the Issuer’s Quarterly Report on Form 10-Q as filed with the Securities and Exchange Commission on November 10, 2021.

  NAMES OF REPORTING PERSONS

  VK Services, LLC

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

  (a)  ☐        (b)  ☒ (1)

  SEC USE ONLY

  CITIZENSHIP OR PLACE OF ORGANIZATION

  Delaware, United States of America

NUMBER OF

SHARES

 BENEFICIALLY 

OWNED BY

EACH

REPORTING

PERSON

WITH:

  SOLE VOTING POWER

  0

  SHARED VOTING POWER

  18,663,428 (2)

  SOLE DISPOSITIVE POWER

  0

  SHARED DISPOSITIVE POWER

  18,663,428 (2)

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

  18,663,428 (2)

  CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

  ☐

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

  3.0% (3)

  TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

  OO

This statement on Schedule 13G is filed by the Reporting Persons. The Reporting Persons expressly disclaim status as a “group” for purposes of this Schedule 13G.

9,766,777 of the shares beneficially owned by VK Services are comprised of Common Stock held by VK Services. All of the remaining shares beneficially owned by VK Services are comprised of Common Stock held by KV IV and KV IV (CF). The general partner of KV IV and KV IV (CF) is KVA IV. VK Services is the sole manager of KVA IV. Khosla is the managing member of VK Services. Each of Khosla, VK Services and KVA IV possesses power to direct the voting and disposition of the shares owned by KV IV and KV IV (CF), and each of Khosla, VK Services and KVA IV may be deemed to have indirect beneficial ownership of such shares. Further, Khosla possesses power to direct the voting and disposition of the shares owned by VK Services, and Khosla may be deemed to have indirect beneficial ownership of such shares.

The percentages set forth on the cover sheets are calculated based on 612,612,711 shares of Common Stock outstanding as of November 3, 2021 as set forth as set forth in the Issuer’s Quarterly Report on Form 10-Q as filed with the Securities and Exchange Commission on November 10, 2021.

  NAMES OF REPORTING PERSONS

  Vinod Khosla

  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

  (a)  ☐        (b)  ☒ (1)

  SEC USE ONLY

  CITIZENSHIP OR PLACE OF ORGANIZATION

  United States of America

NUMBER OF

SHARES

 BENEFICIALLY 

OWNED BY

EACH

REPORTING

PERSON

WITH:

  SOLE VOTING POWER

  0

  SHARED VOTING POWER

  18,663,428 (2)

  SOLE DISPOSITIVE POWER

  0

  SHARED DISPOSITIVE POWER

  18,663,428 (2)

  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

  18,663,428 (2)

  CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

  ☐

  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

  3.0%(3)

  TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

  IN

This statement on Schedule 13G is filed by the Reporting Persons. The Reporting Persons expressly disclaim status as a “group” for purposes of this Schedule 13G.

All of the shares beneficially owned by Khosla are comprised of Common Stock held by VK Services, KV IV and KV IV (CF). The general partner of KV IV and KV IV (CF) is KVA IV. VK Services is the sole manager of KVA IV. Khosla is the managing member of VK Services. Each of Khosla, VK Services and KVA IV possesses power to direct the voting and disposition of the shares owned by KV IV and KV IV (CF), and each of Khosla, VK Services and KVA IV may be deemed to have indirect beneficial ownership of such shares. Further, Khosla possesses power to direct the voting and disposition of the shares owned by VK Services, and Khosla may be deemed to have indirect beneficial ownership of such shares. Khosla holds no shares of the Issuer directly.

The percentages set forth on the cover sheets are calculated based on 612,612,711 shares of Common Stock outstanding as of November 3, 2021 as set forth as set forth in the Issuer’s Quarterly Report on Form 10-Q as filed with the Securities and Exchange Commission on November 10, 2021.

Name of Issuer:

Address of Issuer’s Principal Executive Officers:

Name of Person(s) Filing:

Address of Principal Business Office:

Citizenship:

Title of Class of Securities:

CUSIP Number:

If This Statement is Filed Pursuant to Rule 13d-1(b), or 13d-2(b) or (c), Check Whether the Person Filing is a:

Amount Beneficially Owned:

Percent of Class:

Number of shares as to which such persons have:

KV IV (2)

KV IV (CF) (2)

KVA IV (2)

VK Services (2)

Khosla (2)

Represents the number of shares of Common Stock and the number of shares of Common Stock issuable upon exercise of options, warrants and other convertible securities that are exercisable within 60 days of the date of this statement on Schedule 13G (“Securities”) currently beneficially owned by the Reporting Persons.

The general partner of KV IV and KV IV (CF) is KVA IV. Khosla is the managing member of VK Services. Each of Khosla, VK Services and KVA IV possesses power to direct the voting and disposition of the shares owned by KV IV and KV IV (CF), and each of Khosla, VK Services and KVA IV may be deemed to have indirect beneficial ownership of such shares. Further, Khosla possesses power to direct the voting and disposition of the shares owned by VK Services, and Khosla may be deemed to have indirect beneficial ownership of such shares. KVA IV and Khosla hold no Securities of the Issuer directly.

The percentages set forth on the cover sheets are calculated based on 612,612,711 shares of Common Stock outstanding as of November 3, 2021 as set forth as set forth in the Issuer’s Quarterly Report on Form 10-Q as filed with the Securities and Exchange Commission on November 10, 2021.

Ownership of Five Percent or Less of a Class:

Ownership of More Than Five Percent on Behalf of Another Person:

Identification and Classification of the Subsidiary which Acquired the Security Being Reported on by the Parent Holding Company or Control Person:

Identification and Classification of Members of the Group:

Notice of Dissolution of Group:

Certification:

Delaware limited liability company and

general partner of Khosla Ventures IV, LP

/s/ Vinod Khosla

Delaware limited liability company and

general partner of Khosla Ventures IV (CF), LP

/s/ Vinod Khosla

/s/ Vinod Khosla

/s/ Vinod Khosla

/s/ Vinod Khosla

Delaware limited liability company and

general partner of Khosla Ventures IV, LP

/s/ Vinod Khosla

Delaware limited liability company and

general partner of Khosla Ventures IV (CF), LP

/s/ Vinod Khosla

/s/ Vinod Khosla

/s/ Vinod Khosla

/s/ Vinod Khosla