Accel XI Associates L.L.C.

SEC source: 0001628280-19-007826 · wf-form4_155995697972366.xml · derivative · entry 16

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel Investors 2009 L.L.C. · CIK 0001494979 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI L.P.

Disclosed balance after: 0

Underlying: Class B Common Stock · 1,422,056 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: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.exercise_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.expiration_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F2 · derivative.underlying: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the Reporting Person and has no expiration date.

F6 · ownership.nature: These shares are held by Accel XI LP. Accel XI Associates L.L.C. is the general partner each of Accel XI L.P. and Accel XI Strategic Partners L.P. (together, the "Accel XI Entities"). The managing members of Accel XI Associates L.L.C. are Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong. Accel XI Associates L.L.C. has sole voting and dispositive power with regard to the shares held by the Accel XI Entities, and its managing members share such powers.

SEC source: 0001628280-19-007826 · wf-form4_155995697972366.xml · derivative · entry 15

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel Investors 2009 L.L.C. · CIK 0001494979 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Investors 2013 L.L.C.

Disclosed balance after: 0

Underlying: Class B Common Stock · 172,839 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: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.exercise_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.expiration_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F2 · derivative.underlying: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the Reporting Person and has no expiration date.

F8 · ownership.nature: These shares are held by Accel Investors 2013 L.L.C. The managing members of Accel Investors 2013 L.L.C. are Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong, all of whom share voting and dispositive power with regard to the shares held by Accel Investors 2013 L.L.C.

SEC source: 0001628280-19-007826 · wf-form4_155995697972366.xml · derivative · entry 14

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel Investors 2009 L.L.C. · CIK 0001494979 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI Strategic Partners L.P.

Disclosed balance after: 0

Underlying: Class B Common Stock · 122,277 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: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.exercise_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.expiration_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F2 · derivative.underlying: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the Reporting Person and has no expiration date.

F7 · ownership.nature: These shares are held by Accel XI Strategic Partners L.P. Accel XI Associates L.L.C. is the general partner of each of the Accel XI Entities. The managing members of Accel XI Associates L.L.C. are Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong. Accel XI Associates L.L.C. has sole voting and dispositive power with regard to the shares held by the Accel XI Entities, and its managing members share such powers.

SEC source: 0001628280-19-007826 · wf-form4_155995697972366.xml · derivative · entry 13

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel Investors 2009 L.L.C. · CIK 0001494979 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI L.P.

Disclosed balance after: 0

Underlying: Class B Common Stock · 1,627,468 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: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.exercise_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.expiration_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F2 · derivative.underlying: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the Reporting Person and has no expiration date.

F6 · ownership.nature: These shares are held by Accel XI LP. Accel XI Associates L.L.C. is the general partner each of Accel XI L.P. and Accel XI Strategic Partners L.P. (together, the "Accel XI Entities"). The managing members of Accel XI Associates L.L.C. are Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong. Accel XI Associates L.L.C. has sole voting and dispositive power with regard to the shares held by the Accel XI Entities, and its managing members share such powers.

SEC source: 0001628280-19-007826 · wf-form4_155995697972366.xml · derivative · entry 12

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel Investors 2009 L.L.C. · CIK 0001494979 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Investors 2013 L.L.C.

Disclosed balance after: 0

Underlying: Class B Common Stock · 1,226,520 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: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.exercise_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.expiration_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F2 · derivative.underlying: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the Reporting Person and has no expiration date.

F8 · ownership.nature: These shares are held by Accel Investors 2013 L.L.C. The managing members of Accel Investors 2013 L.L.C. are Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong, all of whom share voting and dispositive power with regard to the shares held by Accel Investors 2013 L.L.C.

SEC source: 0001628280-19-007826 · wf-form4_155995697972366.xml · derivative · entry 11

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel Investors 2009 L.L.C. · CIK 0001494979 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI Strategic Partners L.P.

Disclosed balance after: 0

Underlying: Class B Common Stock · 867,720 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: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.exercise_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.expiration_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F2 · derivative.underlying: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the Reporting Person and has no expiration date.

F7 · ownership.nature: These shares are held by Accel XI Strategic Partners L.P. Accel XI Associates L.L.C. is the general partner of each of the Accel XI Entities. The managing members of Accel XI Associates L.L.C. are Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong. Accel XI Associates L.L.C. has sole voting and dispositive power with regard to the shares held by the Accel XI Entities, and its managing members share such powers.

SEC source: 0001628280-19-007826 · wf-form4_155995697972366.xml · derivative · entry 10

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel Investors 2009 L.L.C. · CIK 0001494979 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI L.P.

Disclosed balance after: 0

Underlying: Class B Common Stock · 11,549,040 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: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.exercise_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.expiration_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F2 · derivative.underlying: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the Reporting Person and has no expiration date.

F6 · ownership.nature: These shares are held by Accel XI LP. Accel XI Associates L.L.C. is the general partner each of Accel XI L.P. and Accel XI Strategic Partners L.P. (together, the "Accel XI Entities"). The managing members of Accel XI Associates L.L.C. are Andrew G. Braccia, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong. Accel XI Associates L.L.C. has sole voting and dispositive power with regard to the shares held by the Accel XI Entities, and its managing members share such powers.

SEC source: 0001628280-19-007826 · wf-form4_155995697972366.xml · derivative · entry 9

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel Investors 2009 L.L.C. · CIK 0001494979 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Investors 2009 L.L.C.

Disclosed balance after: 0

Underlying: Class B Common Stock · 86,550 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: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.exercise_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.expiration_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F2 · derivative.underlying: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the Reporting Person and has no expiration date.

F5 · ownership.nature: These shares are held by Accel Investors 2009 L.L.C. The managing member of Accel Investors 2009 L.L.C. are Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong, all of whom share voting and dispositive power with regard to the shares held by Accel Investors 2009 L.L.C.

SEC source: 0001628280-19-007826 · wf-form4_155995697972366.xml · derivative · entry 8

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel Investors 2009 L.L.C. · CIK 0001494979 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel X Strategic Partners L.P.

Disclosed balance after: 0

Underlying: Class B Common Stock · 161,790 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: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.exercise_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.expiration_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F2 · derivative.underlying: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the Reporting Person and has no expiration date.

F4 · ownership.nature: These shares are held by Accel X Strategic Partners L.P. Accel X Associates L.L.C. is the general partner of each of the Accel X Entities. The managing members of Accel X Associates L.L.C. are Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong. Accel X Associates L.L.C. has sole voting and dispositive power with regard to the shares held by the Accel X Entities, and its managing members share such powers.

SEC source: 0001628280-19-007826 · wf-form4_155995697972366.xml · derivative · entry 7

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel Investors 2009 L.L.C. · CIK 0001494979 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class B Common Stock · 2,155,500 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: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.exercise_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.expiration_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F2 · derivative.underlying: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the Reporting Person and has no expiration date.

F3 · ownership.direct: These shares are held by Accel X L.P. Accel X Associates L.L.C. is the general partner of each of Accel X L.P. and Accel X Strategic Partners L.P. (together, the "Accel X Entities"). The managing members of Accel X Associates L.L.C. are Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong. Accel X Associates L.L.C. has sole voting and dispositive power with regard to the shares held by the Accel X Entities, and its managing members share such powers.

SEC source: 0001628280-19-007826 · wf-form4_155995697972366.xml · derivative · entry 6

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel Investors 2009 L.L.C. · CIK 0001494979 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Investors 2009 L.L.C.

Disclosed balance after: 0

Underlying: Class B Common Stock · 291,510 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: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.exercise_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.expiration_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F2 · derivative.underlying: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the Reporting Person and has no expiration date.

F5 · ownership.nature: These shares are held by Accel Investors 2009 L.L.C. The managing member of Accel Investors 2009 L.L.C. are Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong, all of whom share voting and dispositive power with regard to the shares held by Accel Investors 2009 L.L.C.

SEC source: 0001628280-19-007826 · wf-form4_155995697972366.xml · derivative · entry 5

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel Investors 2009 L.L.C. · CIK 0001494979 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel X Strategic Partners L.P.

Disclosed balance after: 0

Underlying: Class B Common Stock · 544,950 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: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.exercise_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.expiration_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F2 · derivative.underlying: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the Reporting Person and has no expiration date.

F4 · ownership.nature: These shares are held by Accel X Strategic Partners L.P. Accel X Associates L.L.C. is the general partner of each of the Accel X Entities. The managing members of Accel X Associates L.L.C. are Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong. Accel X Associates L.L.C. has sole voting and dispositive power with regard to the shares held by the Accel X Entities, and its managing members share such powers.

SEC source: 0001628280-19-007826 · wf-form4_155995697972366.xml · derivative · entry 4

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel Investors 2009 L.L.C. · CIK 0001494979 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class B Common Stock · 7,260,690 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: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.exercise_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.expiration_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F2 · derivative.underlying: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the Reporting Person and has no expiration date.

F3 · ownership.direct: These shares are held by Accel X L.P. Accel X Associates L.L.C. is the general partner of each of Accel X L.P. and Accel X Strategic Partners L.P. (together, the "Accel X Entities"). The managing members of Accel X Associates L.L.C. are Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong. Accel X Associates L.L.C. has sole voting and dispositive power with regard to the shares held by the Accel X Entities, and its managing members share such powers.

SEC source: 0001628280-19-007826 · wf-form4_155995697972366.xml · derivative · entry 3

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel Investors 2009 L.L.C. · CIK 0001494979 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Investors 2009 L.L.C.

Disclosed balance after: 0

Underlying: Class B Common Stock · 2,375,430 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: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.exercise_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.expiration_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F2 · derivative.underlying: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the Reporting Person and has no expiration date.

F5 · ownership.nature: These shares are held by Accel Investors 2009 L.L.C. The managing member of Accel Investors 2009 L.L.C. are Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong, all of whom share voting and dispositive power with regard to the shares held by Accel Investors 2009 L.L.C.

SEC source: 0001628280-19-007826 · wf-form4_155995697972366.xml · derivative · entry 2

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel Investors 2009 L.L.C. · CIK 0001494979 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel X Strategic Partners L.P.

Disclosed balance after: 0

Underlying: Class B Common Stock · 4,440,750 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: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.exercise_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.expiration_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F2 · derivative.underlying: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the Reporting Person and has no expiration date.

F4 · ownership.nature: These shares are held by Accel X Strategic Partners L.P. Accel X Associates L.L.C. is the general partner of each of the Accel X Entities. The managing members of Accel X Associates L.L.C. are Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong. Accel X Associates L.L.C. has sole voting and dispositive power with regard to the shares held by the Accel X Entities, and its managing members share such powers.

SEC source: 0001628280-19-007826 · wf-form4_155995697972366.xml · derivative · entry 1

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel Investors 2009 L.L.C. · CIK 0001494979 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class B Common Stock · 59,168,130 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: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.exercise_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F1 · derivative.expiration_date: The Series A, Series B, Series C, Series F-1 and Series H-1 Preferred Stock are each convertible into Class B Common Stock on a 1:1 basis and have no expiration date. Upon the effectiveness of the Issuer's Registration Statement on Form S-1, all shares of preferred stock were converted, in an exempt transaction pursuant to Rule 16b-7, into shares of Class B Common Stock of the Issuer.

F2 · derivative.underlying: Each share of Class B Common Stock is convertible into one share of Class A Common Stock at the option of the Reporting Person and has no expiration date.

F3 · ownership.direct: These shares are held by Accel X L.P. Accel X Associates L.L.C. is the general partner of each of Accel X L.P. and Accel X Strategic Partners L.P. (together, the "Accel X Entities"). The managing members of Accel X Associates L.L.C. are Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li, Tracy L. Sedlock, and Richard P. Wong. Accel X Associates L.L.C. has sole voting and dispositive power with regard to the shares held by the Accel X Entities, and its managing members share such powers.

SEC source: 0001209191-19-027786 · doc4.xml · nonDerivative · entry 3

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund Investors 2012 L.L.C.

Disclosed balance after: 951,400

F1 · kind: Transactions reported on this form represent pro rata distributions, and not a purchase or sale of securities, by Accel Growth Fund II L.P., Accel Growth Fund II Strategic Partners L.P., Accel Growth Fund Investors 2012 L.L.C. to their respective general and limited partners or members without consideration. Distribution transactions were executed pursuant to a plan established in compliance with the requirements of Rule 10b5-1.

F4 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of Accel Growth Fund Investors 2012 L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-19-027786 · doc4.xml · nonDerivative · entry 2

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund II Strategic Partners L.P.

Disclosed balance after: 707,826

F1 · kind: Transactions reported on this form represent pro rata distributions, and not a purchase or sale of securities, by Accel Growth Fund II L.P., Accel Growth Fund II Strategic Partners L.P., Accel Growth Fund Investors 2012 L.L.C. to their respective general and limited partners or members without consideration. Distribution transactions were executed pursuant to a plan established in compliance with the requirements of Rule 10b5-1.

F3 · ownership.nature: Accel Growth Fund II Associates L.L.C. is the general partner of Accel Growth Fund II Strategic Partners L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of Accel Growth Fund II Associates L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-19-027786 · doc4.xml · nonDerivative · entry 1

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,775,988

F1 · kind: Transactions reported on this form represent pro rata distributions, and not a purchase or sale of securities, by Accel Growth Fund II L.P., Accel Growth Fund II Strategic Partners L.P., Accel Growth Fund Investors 2012 L.L.C. to their respective general and limited partners or members without consideration. Distribution transactions were executed pursuant to a plan established in compliance with the requirements of Rule 10b5-1.

F2 · ownership.direct: Accel Growth Fund II Associates L.L.C. is the general partner of Accel Growth Fund II L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of Accel Growth Fund II Associates L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-19-009432 · doc4.xml · nonDerivative · entry 3

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund Investors 2012 L.L.C.

Disclosed balance after: 1,155,272

F1 · kind: Transactions reported on this form represent pro rata distributions, and not a purchase or sale of securities, by Accel Growth Fund II L.P., Accel Growth Fund II Strategic Partners L.P., Accel Growth Fund Investors 2012 L.L.C. to their respective general and limited partners or members without consideration. Distribution transactions were executed pursuant to a plan established in compliance with the requirements of Rule 10b5-1.

F4 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of Accel Growth Fund Investors 2012 L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-19-009432 · doc4.xml · nonDerivative · entry 2

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund II Strategic Partners L.P.

Disclosed balance after: 859,503

F1 · kind: Transactions reported on this form represent pro rata distributions, and not a purchase or sale of securities, by Accel Growth Fund II L.P., Accel Growth Fund II Strategic Partners L.P., Accel Growth Fund Investors 2012 L.L.C. to their respective general and limited partners or members without consideration. Distribution transactions were executed pursuant to a plan established in compliance with the requirements of Rule 10b5-1.

F3 · ownership.nature: Accel Growth Fund II Associates L.L.C. is the general partner of Accel Growth Fund II Strategic Partners L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of Accel Growth Fund II Associates L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-19-009432 · doc4.xml · nonDerivative · entry 1

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 11,870,842

F1 · kind: Transactions reported on this form represent pro rata distributions, and not a purchase or sale of securities, by Accel Growth Fund II L.P., Accel Growth Fund II Strategic Partners L.P., Accel Growth Fund Investors 2012 L.L.C. to their respective general and limited partners or members without consideration. Distribution transactions were executed pursuant to a plan established in compliance with the requirements of Rule 10b5-1.

F2 · ownership.direct: Accel Growth Fund II Associates L.L.C. is the general partner of Accel Growth Fund II L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of Accel Growth Fund II Associates L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-18-044434 · doc4.xml · derivative · entry 18

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI Strategic Partners L.P.

Disclosed balance after: 0

Underlying: Common Stock · 163,992 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: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · price: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.exercise_date: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.expiration_date: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F10 · ownership.nature: Accel XI Associates L.L.C. is the General Partner of Accel XI Strategic Partners L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock and Richard P. Wong are the Managing Members of Accel XI Associates L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-18-044434 · doc4.xml · derivative · entry 17

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI L.P.

Disclosed balance after: 0

Underlying: Common Stock · 2,182,696 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: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · price: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.exercise_date: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.expiration_date: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F9 · ownership.nature: Accel XI Associates L.L.C. is the General Partner of Accel XI L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock and Richard P. Wong are the Managing Members of Accel XI Associates L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-18-044434 · doc4.xml · derivative · entry 16

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Investors 2013 L.L.C.

Disclosed balance after: 0

Underlying: Common Stock · 231,806 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: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · price: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.exercise_date: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.expiration_date: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F8 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock and Richard P. Wong are the Managing Members of Accel Investors 2013 L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-18-044434 · doc4.xml · derivative · entry 15

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund Investors 2014 L.L.C.

Disclosed balance after: 0

Underlying: Common Stock · 511,401 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: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · price: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.exercise_date: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.expiration_date: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F7 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of Accel Growth Fund Investors 2014 L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-18-044434 · doc4.xml · derivative · entry 14

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund III Strategic Partners L.P.

Disclosed balance after: 0

Underlying: Common Stock · 364,427 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: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · price: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.exercise_date: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.expiration_date: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F5 · ownership.nature: Accel Growth Fund III Associates L.L.C. is the general partner of Accel Growth Fund III Strategic Partners L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of Accel Growth Fund III Associates L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-18-044434 · doc4.xml · derivative · entry 13

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund III L.P.

Disclosed balance after: 0

Underlying: Common Stock · 7,719,155 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: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · price: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.exercise_date: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.expiration_date: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F4 · ownership.nature: Accel Growth Fund III Associates L.L.C. is the general partner of Accel Growth Fund III L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of Accel Growth Fund III Associates L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-18-044434 · doc4.xml · derivative · entry 12

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund Investors 2012 L.L.C.

Disclosed balance after: 0

Underlying: Common Stock · 1,318,500 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: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · price: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.exercise_date: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.expiration_date: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F6 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of Accel Growth Fund Investors 2012 L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-18-044434 · doc4.xml · derivative · entry 11

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund II Strategic Partners L.P.

Disclosed balance after: 0

Underlying: Common Stock · 980,940 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: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · price: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.exercise_date: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.expiration_date: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F3 · ownership.nature: Accel Growth Fund II Associates L.L.C. is the general partner of Accel Growth Fund II Strategic Partners L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of Accel Growth Fund II Associates L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-18-044434 · doc4.xml · derivative · entry 10

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 13,548,060 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: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · price: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.exercise_date: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.expiration_date: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F2 · ownership.direct: Accel Growth Fund II Associates L.L.C. is the general partner of Accel Growth Fund II L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of Accel Growth Fund II Associates L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-18-044434 · doc4.xml · nonDerivative · entry 9

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI Strategic Partners L.P.

Disclosed balance after: 163,992

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: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F10 · ownership.nature: Accel XI Associates L.L.C. is the General Partner of Accel XI Strategic Partners L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock and Richard P. Wong are the Managing Members of Accel XI Associates L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-18-044434 · doc4.xml · nonDerivative · entry 8

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI L.P.

Disclosed balance after: 2,182,696

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: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F9 · ownership.nature: Accel XI Associates L.L.C. is the General Partner of Accel XI L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock and Richard P. Wong are the Managing Members of Accel XI Associates L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-18-044434 · doc4.xml · nonDerivative · entry 7

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Investors 2013 L.L.C.

Disclosed balance after: 231,806

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: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F8 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock and Richard P. Wong are the Managing Members of Accel Investors 2013 L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-18-044434 · doc4.xml · nonDerivative · entry 6

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund Investors 2014 L.L.C.

Disclosed balance after: 516,699

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: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F7 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of Accel Growth Fund Investors 2014 L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-18-044434 · doc4.xml · nonDerivative · entry 5

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund Investors 2012 L.L.C.

Disclosed balance after: 1,359,144

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: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F6 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of Accel Growth Fund Investors 2012 L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-18-044434 · doc4.xml · nonDerivative · entry 4

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund III Strategic Partners L.P.

Disclosed balance after: 368,202

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: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F5 · ownership.nature: Accel Growth Fund III Associates L.L.C. is the general partner of Accel Growth Fund III Strategic Partners L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of Accel Growth Fund III Associates L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-18-044434 · doc4.xml · nonDerivative · entry 3

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund III L.P.

Disclosed balance after: 7,799,122

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: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F4 · ownership.nature: Accel Growth Fund III Associates L.L.C. is the general partner of Accel Growth Fund III L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of Accel Growth Fund III Associates L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-18-044434 · doc4.xml · nonDerivative · entry 2

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund II Strategic Partners L.P.

Disclosed balance after: 1,011,180

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: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F3 · ownership.nature: Accel Growth Fund II Associates L.L.C. is the general partner of Accel Growth Fund II Strategic Partners L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of Accel Growth Fund II Associates L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001209191-18-044434 · doc4.xml · nonDerivative · entry 1

Accel Growth Fund II L.P. · CIK 0001522762 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,965,696

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: In connection with the Issuer's initial public offering on July 30, 2018, each share of Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F2 · ownership.direct: Accel Growth Fund II Associates L.L.C. is the general partner of Accel Growth Fund II L.P. and has the sole voting and investment power. Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of Accel Growth Fund II Associates L.L.C. and share voting and investment powers over such shares. The Managing Members disclaim beneficial ownership except to the extent of their pecuniary interest therein.

SEC source: 0001140361-17-037672 · doc1.xml · nonDerivative · entry 9

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2008 L.L.C. · CIK 0001494980 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI Strategic Partners L.P.

Disclosed balance after: 0

F5 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock and Richard P. Wong are the Managing Members of Accel Investors 2013 L.L.C. and Accel XI Associates L.L.C. and share voting and investment powers over such shares.

F6 · ownership.nature: Accel XI Associates L.L.C. is the General Partner of Accel XI, L.P. and Accel XI Strategic Partners L.P. and has the sole voting and investment power.

SEC source: 0001140361-17-037672 · doc1.xml · nonDerivative · entry 8

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2008 L.L.C. · CIK 0001494980 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel XI, L.P.

Disclosed balance after: 0

F5 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock and Richard P. Wong are the Managing Members of Accel Investors 2013 L.L.C. and Accel XI Associates L.L.C. and share voting and investment powers over such shares.

F6 · ownership.nature: Accel XI Associates L.L.C. is the General Partner of Accel XI, L.P. and Accel XI Strategic Partners L.P. and has the sole voting and investment power.

SEC source: 0001140361-17-037672 · doc1.xml · nonDerivative · entry 7

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2008 L.L.C. · CIK 0001494980 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Investors 2013 L.L.C.

Disclosed balance after: 0

F5 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock and Richard P. Wong are the Managing Members of Accel Investors 2013 L.L.C. and Accel XI Associates L.L.C. and share voting and investment powers over such shares.

SEC source: 0001140361-17-037672 · doc1.xml · nonDerivative · entry 6

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2008 L.L.C. · CIK 0001494980 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund Investors 2012 L.L.C.

Disclosed balance after: 189,720

F4 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of AGF II Associates and Accel Growth Fund Investors 2012 L.L.C. and share voting and investment powers over such shares.

SEC source: 0001140361-17-037672 · doc1.xml · nonDerivative · entry 5

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2008 L.L.C. · CIK 0001494980 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund II Strategic Partners L.P.

Disclosed balance after: 141,150

F3 · ownership.nature: Accel Growth Fund II Associates L.L.C. ("AGF II Associates") is the general partner of Accel Growth Fund II L.P. ("AGF II") and Accel Growth Fund II Strategic Partners L.P. ("AGF II Strategic") and has the sole voting and investment power.

F4 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of AGF II Associates and Accel Growth Fund Investors 2012 L.L.C. and share voting and investment powers over such shares.

SEC source: 0001140361-17-037672 · doc1.xml · nonDerivative · entry 4

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2008 L.L.C. · CIK 0001494980 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund II L.P.

Disclosed balance after: 1,949,426

F3 · ownership.nature: Accel Growth Fund II Associates L.L.C. ("AGF II Associates") is the general partner of Accel Growth Fund II L.P. ("AGF II") and Accel Growth Fund II Strategic Partners L.P. ("AGF II Strategic") and has the sole voting and investment power.

F4 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of AGF II Associates and Accel Growth Fund Investors 2012 L.L.C. and share voting and investment powers over such shares.

SEC source: 0001140361-17-037672 · doc1.xml · nonDerivative · entry 3

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2008 L.L.C. · CIK 0001494980 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel X Strategic Partners L.P.

Disclosed balance after: 616,315

F1 · ownership.nature: Accel X Associates L.L.C. is the general partner of Accel X L.P. and Accel X Strategic Partners L.P. and has the sole voting and investment power.

F2 · ownership.nature: Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock and Richard P. Wong are the Managing Members of Accel Investors 2008 L.L.C. and Accel X Associates L.L.C. and share voting and investment powers over such shares.

SEC source: 0001140361-17-037672 · doc1.xml · nonDerivative · entry 2

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2008 L.L.C. · CIK 0001494980 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Investors 2008 L.L.C.

Disclosed balance after: 850,559

F2 · ownership.nature: Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock and Richard P. Wong are the Managing Members of Accel Investors 2008 L.L.C. and Accel X Associates L.L.C. and share voting and investment powers over such shares.

SEC source: 0001140361-17-037672 · doc1.xml · nonDerivative · entry 1

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2008 L.L.C. · CIK 0001494980 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,133,112

F1 · ownership.direct: Accel X Associates L.L.C. is the general partner of Accel X L.P. and Accel X Strategic Partners L.P. and has the sole voting and investment power.

F2 · ownership.direct: Andrew G. Braccia, Kevin J. Efrusy, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock and Richard P. Wong are the Managing Members of Accel Investors 2008 L.L.C. and Accel X Associates L.L.C. and share voting and investment powers over such shares.

SEC source: 0001140361-17-018128 · doc1.xml · derivative · entry 24

Accel X LP · CIK 0001419457 · 10% owner

ACCEL X STRATEGIC PARTNERS LP · CIK 0001430231 · 10% owner

Accel XI L.P. · CIK 0001522763 · 10% owner

Accel XI Strategic Partners L.P. · CIK 0001527391 · 10% owner

Accel X Associates L.L.C. · CIK 0001494996 · 10% owner

Accel XI Associates L.L.C. · CIK 0001535603 · 10% owner

Accel Investors 2008 L.L.C. · CIK 0001494980 · 10% owner

Accel Investors 2013 L.L.C. · CIK 0001589159 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · By Accel Growth Fund Investors 2012 L.L.C.

Disclosed balance after: 0

Underlying: Common Stock · 293,736 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: In connection with the consummation of the Issuer's initial public offering on May 3, 2017, each share of Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock and Series E Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · price: In connection with the consummation of the Issuer's initial public offering on May 3, 2017, each share of Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock and Series E Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.exercise_date: In connection with the consummation of the Issuer's initial public offering on May 3, 2017, each share of Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock and Series E Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F1 · derivative.expiration_date: In connection with the consummation of the Issuer's initial public offering on May 3, 2017, each share of Series A Preferred Stock, Series B Preferred Stock, Series C Preferred Stock, Series D Preferred Stock and Series E Preferred Stock automatically converted into one (1) share of Common Stock for no additional consideration, and had no expiration date. All shares of Common Stock issued upon conversion were aggregated.

F5 · ownership.nature: Andrew G. Braccia, Sameer K. Gandhi, Ping Li (who is a director of the Issuer), Tracy L. Sedlock, Ryan J. Sweeney and Richard P. Wong are the Managing Members of AGF II Associates and Accel Growth Fund Investors 2012 L.L.C. and share voting and investment powers over such shares.