W

SEC source: 0001616707-18-000103 · wf-form4_152003161182292.xml · nonDerivative · entry 2

Gamgort Robert James · CIK 0001570836 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 28,375

SEC source: 0000899243-18-006201 · doc4.xml · nonDerivative · entry 18

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 229,785

F12 · price: This transaction was executed in multiple trades at prices ranging from $78.54 to $79.35 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F5 · ownership.direct: These securities are owned solely by HarbourVest Partners 2007 Direct Fund L.P. ("HV Direct"). HarbourVest Partners, LLC is the managing member of HarbourVest 2007 Direct Associates LLC, which is the general partner of HarbourVest 2007 Direct Associates L.P., which is the general partner of HV Direct. Each of HarbourVest Partners, LLC, HarbourVest 2007 Direct Associates LLC and HarbourVest 2007 Direct Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Direct and each disclaims beneficial ownership of the securities held by HV Direct, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F6 · ownership.direct: Each of HV Co-Invest, HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P disclaims beneficial ownership of the securities held by HV Direct and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-006201 · doc4.xml · nonDerivative · entry 17

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 234,468

F11 · price: This transaction was executed in multiple trades at prices ranging from $77.50 to $78.4901 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F5 · ownership.direct: These securities are owned solely by HarbourVest Partners 2007 Direct Fund L.P. ("HV Direct"). HarbourVest Partners, LLC is the managing member of HarbourVest 2007 Direct Associates LLC, which is the general partner of HarbourVest 2007 Direct Associates L.P., which is the general partner of HV Direct. Each of HarbourVest Partners, LLC, HarbourVest 2007 Direct Associates LLC and HarbourVest 2007 Direct Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Direct and each disclaims beneficial ownership of the securities held by HV Direct, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F6 · ownership.direct: Each of HV Co-Invest, HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P disclaims beneficial ownership of the securities held by HV Direct and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-006201 · doc4.xml · nonDerivative · entry 16

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 114,893

F12 · price: This transaction was executed in multiple trades at prices ranging from $78.54 to $79.35 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F3 · ownership.direct: These securities are owned solely by HarbourVest/NYSTRS Co-Invest Fund L.P. ("HV Co-Invest"). HarbourVest Partners, LLC is the managing member of HIPEP VI Select Associates LLC, which is the general partner of HIPEP VI Select Associates L.P., which is the general partner of HV Co-Invest. Each of HarbourVest Partners, LLC, HIPEP VI Select Associates LLC and HIPEP VI Select Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Co-Invest and each disclaims beneficial ownership of the securities held by HV Co-Invest, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F4 · ownership.direct: Each of HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV Direct, HarbourVest 2007 Direct Associates LLC, HarbourVest 2007 Direct Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P disclaims beneficial ownership of the securities held by HV Co-Invest and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-006201 · doc4.xml · nonDerivative · entry 15

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 117,233

F11 · price: This transaction was executed in multiple trades at prices ranging from $77.50 to $78.4901 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F3 · ownership.direct: These securities are owned solely by HarbourVest/NYSTRS Co-Invest Fund L.P. ("HV Co-Invest"). HarbourVest Partners, LLC is the managing member of HIPEP VI Select Associates LLC, which is the general partner of HIPEP VI Select Associates L.P., which is the general partner of HV Co-Invest. Each of HarbourVest Partners, LLC, HIPEP VI Select Associates LLC and HIPEP VI Select Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Co-Invest and each disclaims beneficial ownership of the securities held by HV Co-Invest, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F4 · ownership.direct: Each of HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV Direct, HarbourVest 2007 Direct Associates LLC, HarbourVest 2007 Direct Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P disclaims beneficial ownership of the securities held by HV Co-Invest and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-006201 · doc4.xml · nonDerivative · entry 14

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 114,893

F12 · price: This transaction was executed in multiple trades at prices ranging from $78.54 to $79.35 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F1 · ownership.direct: These securities are owned solely by HarbourVest Partners VIII-Venture Fund, L.P. ("HV Ventures"). HarbourVest Partners, LLC is the managing member of HarbourVest VIII-Venture Associates LLC, which is the general partner of HarbourVest VIII-Venture Associates L.P., which is the general partner of HV Ventures. Each of HarbourVest Partners, LLC, HarbourVest VIII-Venture Associates LLC and HarbourVest VIII-Venture Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Ventures and each disclaims beneficial ownership of the securities held by HV Ventures, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F2 · ownership.direct: Each of HV Co-Invest (as defined below), HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Direct (as defined below), HarbourVest 2007 Direct Associates LLC, HarbourVest 2007 Direct Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P,. disclaims beneficial ownership of the securities held by HV Ventures and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-006201 · doc4.xml · nonDerivative · entry 13

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 117,233

F11 · price: This transaction was executed in multiple trades at prices ranging from $77.50 to $78.4901 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F1 · ownership.direct: These securities are owned solely by HarbourVest Partners VIII-Venture Fund, L.P. ("HV Ventures"). HarbourVest Partners, LLC is the managing member of HarbourVest VIII-Venture Associates LLC, which is the general partner of HarbourVest VIII-Venture Associates L.P., which is the general partner of HV Ventures. Each of HarbourVest Partners, LLC, HarbourVest VIII-Venture Associates LLC and HarbourVest VIII-Venture Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Ventures and each disclaims beneficial ownership of the securities held by HV Ventures, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F2 · ownership.direct: Each of HV Co-Invest (as defined below), HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Direct (as defined below), HarbourVest 2007 Direct Associates LLC, HarbourVest 2007 Direct Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P,. disclaims beneficial ownership of the securities held by HV Ventures and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0001616707-18-000104 · wf-form4_152003163087139.xml · derivative · entry 6

Macri Edmond · CIK 0001620023 · Chief Product/Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 501 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

F1 · price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

F1 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

F1 · derivative.expiration_date: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

SEC source: 0001616707-18-000104 · wf-form4_152003163087139.xml · derivative · entry 5

Macri Edmond · CIK 0001620023 · Chief Product/Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 501

Underlying: Class A Common Stock · 501 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

F1 · price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

F1 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

F1 · derivative.expiration_date: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

SEC source: 0001616707-18-000104 · wf-form4_152003163087139.xml · derivative · entry 4

Macri Edmond · CIK 0001620023 · Chief Product/Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class B Common Stock · 501 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.

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Class B Common Stock when vested.

F4 · derivative.exercise_date: These RSUs vest upon the satisfaction of a service condition and an event condition and have no expiration date. The service condition is satisfied as to 1/5th of the shares on March 1, 2014 and as to an additional 1/60th of the shares for each month of continuous service thereafter. The event condition was satisfied on the closing of the issuer's initial public offering of Class A Common Stock.

F4 · derivative.expiration_date: These RSUs vest upon the satisfaction of a service condition and an event condition and have no expiration date. The service condition is satisfied as to 1/5th of the shares on March 1, 2014 and as to an additional 1/60th of the shares for each month of continuous service thereafter. The event condition was satisfied on the closing of the issuer's initial public offering of Class A Common Stock.

SEC source: 0001616707-18-000104 · wf-form4_152003163087139.xml · nonDerivative · entry 2

Macri Edmond · CIK 0001620023 · Chief Product/Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 848

F2 · kind: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of the RSUs listed in Table II and does not represent a discretionary trade by the reporting person.

SEC source: 0001616707-18-000104 · wf-form4_152003163087139.xml · nonDerivative · entry 1

Macri Edmond · CIK 0001620023 · Chief Product/Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,001

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

F1 · price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

SEC source: 0001616707-18-000106 · wf-form4_152003167757368.xml · derivative · entry 5

Oblak Steve · CIK 0001620159 · Chief Merchandising Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 500 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

F1 · price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

F1 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

F1 · derivative.expiration_date: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

SEC source: 0001616707-18-000106 · wf-form4_152003167757368.xml · derivative · entry 4

Oblak Steve · CIK 0001620159 · Chief Merchandising Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 500

Underlying: Class A Common Stock · 500 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

F1 · price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

F1 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

F1 · derivative.expiration_date: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

SEC source: 0001616707-18-000106 · wf-form4_152003167757368.xml · derivative · entry 3

Oblak Steve · CIK 0001620159 · Chief Merchandising Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,001

Underlying: Class B Common Stock · 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.

F3 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Class B Common Stock when vested.

F4 · derivative.exercise_date: These RSUs vest upon the satisfaction of a service condition and an event condition and have no expiration date. The service condition is satisfied as to 1/5th of the shares on March 1, 2015 and as to an additional 1/60th of the shares for each month of continuous service thereafter. The event condition was satisfied on the closing of the issuer's initial public offering of Class A Common Stock.

F4 · derivative.expiration_date: These RSUs vest upon the satisfaction of a service condition and an event condition and have no expiration date. The service condition is satisfied as to 1/5th of the shares on March 1, 2015 and as to an additional 1/60th of the shares for each month of continuous service thereafter. The event condition was satisfied on the closing of the issuer's initial public offering of Class A Common Stock.

SEC source: 0001616707-18-000106 · wf-form4_152003167757368.xml · nonDerivative · entry 2

Oblak Steve · CIK 0001620159 · Chief Merchandising Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 128,790

F2 · kind: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of the RSUs listed in Table II and does not represent a discretionary trade by the reporting person.

SEC source: 0001616707-18-000106 · wf-form4_152003167757368.xml · nonDerivative · entry 1

Oblak Steve · CIK 0001620159 · Chief Merchandising Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 128,943

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

F1 · price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

SEC source: 0001616707-18-000105 · wf-form4_152003165448641.xml · derivative · entry 7

Mulliken John Champlin · CIK 0001620147 · Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 501 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.

F2 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

F2 · price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

F2 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

F2 · derivative.expiration_date: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

SEC source: 0001616707-18-000105 · wf-form4_152003165448641.xml · derivative · entry 6

Mulliken John Champlin · CIK 0001620147 · Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 501

Underlying: Class A Common Stock · 501 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.

F2 · derivative.exercise_price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

F2 · price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

F2 · derivative.exercise_date: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

F2 · derivative.expiration_date: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

SEC source: 0001616707-18-000105 · wf-form4_152003165448641.xml · derivative · entry 5

Mulliken John Champlin · CIK 0001620147 · Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class B Common Stock · 501 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.

F4 · derivative.exercise_price: Each RSU represents a contingent right to receive one share of Class B Common Stock when vested.

F5 · derivative.exercise_date: These RSUs vest upon the satisfaction of a service condition and an event condition and have no expiration date. The service condition is satisfied as to 1/5th of the shares on March 1, 2014 and as to an additional 1/60th of the shares for each month of continuous service thereafter. The event condition was satisfied on the closing of the issuer's initial public offering of Class A Common Stock.

F5 · derivative.expiration_date: These RSUs vest upon the satisfaction of a service condition and an event condition and have no expiration date. The service condition is satisfied as to 1/5th of the shares on March 1, 2014 and as to an additional 1/60th of the shares for each month of continuous service thereafter. The event condition was satisfied on the closing of the issuer's initial public offering of Class A Common Stock.

SEC source: 0001616707-18-000105 · wf-form4_152003165448641.xml · nonDerivative · entry 4

Mulliken John Champlin · CIK 0001620147 · Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,062

F3 · kind: Represents the number of shares required to be sold by the reporting person to cover tax withholding obligations in connection with the vesting of the RSUs listed in Table II and does not represent a discretionary trade by the reporting person.

SEC source: 0001616707-18-000105 · wf-form4_152003165448641.xml · nonDerivative · entry 3

Mulliken John Champlin · CIK 0001620147 · Chief Technology Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,215

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.

F2 · price: Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock and has no expiration date. In addition, each share of Class B Common Stock will automatically convert into one share of Class A Common Stock (a) upon transfer thereof, subject to certain exceptions, (b) upon the date on which the outstanding shares of Class B Common Stock represent less than 10% of the aggregate number of shares of the then outstanding Class A Common Stock and Class B Common Stock, or (c) in the event that holders of at least 66 2/3% of the then outstanding shares of Class B Common Stock elect to convert all shares of Class B Common Stock into shares of Class A Common Stock.

SEC source: 0000899243-18-006201 · doc4.xml · nonDerivative · entry 12

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 272,341

F10 · price: This transaction was executed in multiple trades at prices ranging from $78.5801 to $78.86 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F5 · ownership.direct: These securities are owned solely by HarbourVest Partners 2007 Direct Fund L.P. ("HV Direct"). HarbourVest Partners, LLC is the managing member of HarbourVest 2007 Direct Associates LLC, which is the general partner of HarbourVest 2007 Direct Associates L.P., which is the general partner of HV Direct. Each of HarbourVest Partners, LLC, HarbourVest 2007 Direct Associates LLC and HarbourVest 2007 Direct Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Direct and each disclaims beneficial ownership of the securities held by HV Direct, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F6 · ownership.direct: Each of HV Co-Invest, HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P disclaims beneficial ownership of the securities held by HV Direct and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-006201 · doc4.xml · nonDerivative · entry 11

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 275,485

F9 · price: This transaction was executed in multiple trades at prices ranging from $77.56 to $78.56 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F5 · ownership.direct: These securities are owned solely by HarbourVest Partners 2007 Direct Fund L.P. ("HV Direct"). HarbourVest Partners, LLC is the managing member of HarbourVest 2007 Direct Associates LLC, which is the general partner of HarbourVest 2007 Direct Associates L.P., which is the general partner of HV Direct. Each of HarbourVest Partners, LLC, HarbourVest 2007 Direct Associates LLC and HarbourVest 2007 Direct Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Direct and each disclaims beneficial ownership of the securities held by HV Direct, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F6 · ownership.direct: Each of HV Co-Invest, HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P disclaims beneficial ownership of the securities held by HV Direct and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-006201 · doc4.xml · nonDerivative · entry 10

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 319,435

F8 · price: This transaction was executed in multiple trades at prices ranging from $76.52 to $77.52 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F5 · ownership.direct: These securities are owned solely by HarbourVest Partners 2007 Direct Fund L.P. ("HV Direct"). HarbourVest Partners, LLC is the managing member of HarbourVest 2007 Direct Associates LLC, which is the general partner of HarbourVest 2007 Direct Associates L.P., which is the general partner of HV Direct. Each of HarbourVest Partners, LLC, HarbourVest 2007 Direct Associates LLC and HarbourVest 2007 Direct Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Direct and each disclaims beneficial ownership of the securities held by HV Direct, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F6 · ownership.direct: Each of HV Co-Invest, HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P disclaims beneficial ownership of the securities held by HV Direct and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-006201 · doc4.xml · nonDerivative · entry 9

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 338,085

F7 · price: This transaction was executed in multiple trades at prices ranging from $75.5001 to $76.5001 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F5 · ownership.direct: These securities are owned solely by HarbourVest Partners 2007 Direct Fund L.P. ("HV Direct"). HarbourVest Partners, LLC is the managing member of HarbourVest 2007 Direct Associates LLC, which is the general partner of HarbourVest 2007 Direct Associates L.P., which is the general partner of HV Direct. Each of HarbourVest Partners, LLC, HarbourVest 2007 Direct Associates LLC and HarbourVest 2007 Direct Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Direct and each disclaims beneficial ownership of the securities held by HV Direct, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F6 · ownership.direct: Each of HV Co-Invest, HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P disclaims beneficial ownership of the securities held by HV Direct and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-006201 · doc4.xml · nonDerivative · entry 8

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 136,171

F10 · price: This transaction was executed in multiple trades at prices ranging from $78.5801 to $78.86 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F3 · ownership.direct: These securities are owned solely by HarbourVest/NYSTRS Co-Invest Fund L.P. ("HV Co-Invest"). HarbourVest Partners, LLC is the managing member of HIPEP VI Select Associates LLC, which is the general partner of HIPEP VI Select Associates L.P., which is the general partner of HV Co-Invest. Each of HarbourVest Partners, LLC, HIPEP VI Select Associates LLC and HIPEP VI Select Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Co-Invest and each disclaims beneficial ownership of the securities held by HV Co-Invest, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F4 · ownership.direct: Each of HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV Direct, HarbourVest 2007 Direct Associates LLC, HarbourVest 2007 Direct Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P disclaims beneficial ownership of the securities held by HV Co-Invest and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-006201 · doc4.xml · nonDerivative · entry 7

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 137,743

F9 · price: This transaction was executed in multiple trades at prices ranging from $77.56 to $78.56 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F3 · ownership.direct: These securities are owned solely by HarbourVest/NYSTRS Co-Invest Fund L.P. ("HV Co-Invest"). HarbourVest Partners, LLC is the managing member of HIPEP VI Select Associates LLC, which is the general partner of HIPEP VI Select Associates L.P., which is the general partner of HV Co-Invest. Each of HarbourVest Partners, LLC, HIPEP VI Select Associates LLC and HIPEP VI Select Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Co-Invest and each disclaims beneficial ownership of the securities held by HV Co-Invest, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F4 · ownership.direct: Each of HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV Direct, HarbourVest 2007 Direct Associates LLC, HarbourVest 2007 Direct Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P disclaims beneficial ownership of the securities held by HV Co-Invest and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-006201 · doc4.xml · nonDerivative · entry 6

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 159,718

F8 · price: This transaction was executed in multiple trades at prices ranging from $76.52 to $77.52 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F3 · ownership.direct: These securities are owned solely by HarbourVest/NYSTRS Co-Invest Fund L.P. ("HV Co-Invest"). HarbourVest Partners, LLC is the managing member of HIPEP VI Select Associates LLC, which is the general partner of HIPEP VI Select Associates L.P., which is the general partner of HV Co-Invest. Each of HarbourVest Partners, LLC, HIPEP VI Select Associates LLC and HIPEP VI Select Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Co-Invest and each disclaims beneficial ownership of the securities held by HV Co-Invest, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F4 · ownership.direct: Each of HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV Direct, HarbourVest 2007 Direct Associates LLC, HarbourVest 2007 Direct Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P disclaims beneficial ownership of the securities held by HV Co-Invest and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-006201 · doc4.xml · nonDerivative · entry 5

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 169,043

F7 · price: This transaction was executed in multiple trades at prices ranging from $75.5001 to $76.5001 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F3 · ownership.direct: These securities are owned solely by HarbourVest/NYSTRS Co-Invest Fund L.P. ("HV Co-Invest"). HarbourVest Partners, LLC is the managing member of HIPEP VI Select Associates LLC, which is the general partner of HIPEP VI Select Associates L.P., which is the general partner of HV Co-Invest. Each of HarbourVest Partners, LLC, HIPEP VI Select Associates LLC and HIPEP VI Select Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Co-Invest and each disclaims beneficial ownership of the securities held by HV Co-Invest, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F4 · ownership.direct: Each of HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV Direct, HarbourVest 2007 Direct Associates LLC, HarbourVest 2007 Direct Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P disclaims beneficial ownership of the securities held by HV Co-Invest and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-006201 · doc4.xml · nonDerivative · entry 4

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 136,171

F10 · price: This transaction was executed in multiple trades at prices ranging from $78.5801 to $78.86 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F1 · ownership.direct: These securities are owned solely by HarbourVest Partners VIII-Venture Fund, L.P. ("HV Ventures"). HarbourVest Partners, LLC is the managing member of HarbourVest VIII-Venture Associates LLC, which is the general partner of HarbourVest VIII-Venture Associates L.P., which is the general partner of HV Ventures. Each of HarbourVest Partners, LLC, HarbourVest VIII-Venture Associates LLC and HarbourVest VIII-Venture Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Ventures and each disclaims beneficial ownership of the securities held by HV Ventures, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F2 · ownership.direct: Each of HV Co-Invest (as defined below), HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Direct (as defined below), HarbourVest 2007 Direct Associates LLC, HarbourVest 2007 Direct Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P,. disclaims beneficial ownership of the securities held by HV Ventures and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-006201 · doc4.xml · nonDerivative · entry 3

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 137,743

F9 · price: This transaction was executed in multiple trades at prices ranging from $77.56 to $78.56 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F1 · ownership.direct: These securities are owned solely by HarbourVest Partners VIII-Venture Fund, L.P. ("HV Ventures"). HarbourVest Partners, LLC is the managing member of HarbourVest VIII-Venture Associates LLC, which is the general partner of HarbourVest VIII-Venture Associates L.P., which is the general partner of HV Ventures. Each of HarbourVest Partners, LLC, HarbourVest VIII-Venture Associates LLC and HarbourVest VIII-Venture Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Ventures and each disclaims beneficial ownership of the securities held by HV Ventures, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F2 · ownership.direct: Each of HV Co-Invest (as defined below), HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Direct (as defined below), HarbourVest 2007 Direct Associates LLC, HarbourVest 2007 Direct Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P,. disclaims beneficial ownership of the securities held by HV Ventures and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-006201 · doc4.xml · nonDerivative · entry 2

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 159,718

F8 · price: This transaction was executed in multiple trades at prices ranging from $76.52 to $77.52 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F1 · ownership.direct: These securities are owned solely by HarbourVest Partners VIII-Venture Fund, L.P. ("HV Ventures"). HarbourVest Partners, LLC is the managing member of HarbourVest VIII-Venture Associates LLC, which is the general partner of HarbourVest VIII-Venture Associates L.P., which is the general partner of HV Ventures. Each of HarbourVest Partners, LLC, HarbourVest VIII-Venture Associates LLC and HarbourVest VIII-Venture Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Ventures and each disclaims beneficial ownership of the securities held by HV Ventures, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F2 · ownership.direct: Each of HV Co-Invest (as defined below), HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Direct (as defined below), HarbourVest 2007 Direct Associates LLC, HarbourVest 2007 Direct Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P,. disclaims beneficial ownership of the securities held by HV Ventures and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-006201 · doc4.xml · nonDerivative · entry 1

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 169,043

F7 · price: This transaction was executed in multiple trades at prices ranging from $75.5001 to $76.5001 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F1 · ownership.direct: These securities are owned solely by HarbourVest Partners VIII-Venture Fund, L.P. ("HV Ventures"). HarbourVest Partners, LLC is the managing member of HarbourVest VIII-Venture Associates LLC, which is the general partner of HarbourVest VIII-Venture Associates L.P., which is the general partner of HV Ventures. Each of HarbourVest Partners, LLC, HarbourVest VIII-Venture Associates LLC and HarbourVest VIII-Venture Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Ventures and each disclaims beneficial ownership of the securities held by HV Ventures, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F2 · ownership.direct: Each of HV Co-Invest (as defined below), HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Direct (as defined below), HarbourVest 2007 Direct Associates LLC, HarbourVest 2007 Direct Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P,. disclaims beneficial ownership of the securities held by HV Ventures and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0001616707-18-000103 · wf-form4_152003161182292.xml · nonDerivative · entry 1

Gamgort Robert James · CIK 0001570836 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,175

F1 · price: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $77.96 to $78.17, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in this footnote.

SEC source: 0000899243-18-005857 · doc4.xml · nonDerivative · entry 9

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 352,285

F9 · price: This transaction was executed in multiple trades at prices ranging from $76.00 to $76.77 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F5 · ownership.direct: These securities are owned solely by HarbourVest Partners 2007 Direct Fund L.P. ("HV Direct"). HarbourVest Partners, LLC is the managing member of HarbourVest 2007 Direct Associates LLC, which is the general partner of HarbourVest 2007 Direct Associates L.P., which is the general partner of HV Direct. Each of HarbourVest Partners, LLC, HarbourVest 2007 Direct Associates LLC and HarbourVest 2007 Direct Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Direct and each disclaims beneficial ownership of the securities held by HV Direct, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F6 · ownership.direct: Each of HV Co-Invest, HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P disclaims beneficial ownership of the securities held by HV Direct and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-005857 · doc4.xml · nonDerivative · entry 8

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 176,143

F9 · price: This transaction was executed in multiple trades at prices ranging from $76.00 to $76.77 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F3 · ownership.direct: These securities are owned solely by HarbourVest/NYSTRS Co-Invest Fund L.P. ("HV Co-Invest"). HarbourVest Partners, LLC is the managing member of HIPEP VI Select Associates LLC, which is the general partner of HIPEP VI Select Associates L.P., which is the general partner of HV Co-Invest. Each of HarbourVest Partners, LLC, HIPEP VI Select Associates LLC and HIPEP VI Select Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Co-Invest and each disclaims beneficial ownership of the securities held by HV Co-Invest, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F4 · ownership.direct: Each of HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV Direct, HarbourVest 2007 Direct Associates LLC, HarbourVest 2007 Direct Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P disclaims beneficial ownership of the securities held by HV Co-Invest and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-005857 · doc4.xml · nonDerivative · entry 7

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 176,143

F9 · price: This transaction was executed in multiple trades at prices ranging from $76.00 to $76.77 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F1 · ownership.direct: These securities are owned solely by HarbourVest Partners VIII-Venture Fund, L.P. ("HV Ventures"). HarbourVest Partners, LLC is the managing member of HarbourVest VIII-Venture Associates LLC, which is the general partner of HarbourVest VIII-Venture Associates L.P., which is the general partner of HV Ventures. Each of HarbourVest Partners, LLC, HarbourVest VIII-Venture Associates LLC and HarbourVest VIII-Venture Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Ventures and each disclaims beneficial ownership of the securities held by HV Ventures, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F2 · ownership.direct: Each of HV Co-Invest (as defined below), HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Direct (as defined below), HarbourVest 2007 Direct Associates LLC, HarbourVest 2007 Direct Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P,. disclaims beneficial ownership of the securities held by HV Ventures and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-005857 · doc4.xml · nonDerivative · entry 6

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 429,970

F8 · price: This transaction was executed in multiple trades at prices ranging from $75.00 to $75.99 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F5 · ownership.direct: These securities are owned solely by HarbourVest Partners 2007 Direct Fund L.P. ("HV Direct"). HarbourVest Partners, LLC is the managing member of HarbourVest 2007 Direct Associates LLC, which is the general partner of HarbourVest 2007 Direct Associates L.P., which is the general partner of HV Direct. Each of HarbourVest Partners, LLC, HarbourVest 2007 Direct Associates LLC and HarbourVest 2007 Direct Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Direct and each disclaims beneficial ownership of the securities held by HV Direct, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F6 · ownership.direct: Each of HV Co-Invest, HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P disclaims beneficial ownership of the securities held by HV Direct and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-005857 · doc4.xml · nonDerivative · entry 5

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 214,985

F8 · price: This transaction was executed in multiple trades at prices ranging from $75.00 to $75.99 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F3 · ownership.direct: These securities are owned solely by HarbourVest/NYSTRS Co-Invest Fund L.P. ("HV Co-Invest"). HarbourVest Partners, LLC is the managing member of HIPEP VI Select Associates LLC, which is the general partner of HIPEP VI Select Associates L.P., which is the general partner of HV Co-Invest. Each of HarbourVest Partners, LLC, HIPEP VI Select Associates LLC and HIPEP VI Select Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Co-Invest and each disclaims beneficial ownership of the securities held by HV Co-Invest, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F4 · ownership.direct: Each of HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV Direct, HarbourVest 2007 Direct Associates LLC, HarbourVest 2007 Direct Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P disclaims beneficial ownership of the securities held by HV Co-Invest and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-005857 · doc4.xml · nonDerivative · entry 4

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 214,985

F8 · price: This transaction was executed in multiple trades at prices ranging from $75.00 to $75.99 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F1 · ownership.direct: These securities are owned solely by HarbourVest Partners VIII-Venture Fund, L.P. ("HV Ventures"). HarbourVest Partners, LLC is the managing member of HarbourVest VIII-Venture Associates LLC, which is the general partner of HarbourVest VIII-Venture Associates L.P., which is the general partner of HV Ventures. Each of HarbourVest Partners, LLC, HarbourVest VIII-Venture Associates LLC and HarbourVest VIII-Venture Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Ventures and each disclaims beneficial ownership of the securities held by HV Ventures, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F2 · ownership.direct: Each of HV Co-Invest (as defined below), HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Direct (as defined below), HarbourVest 2007 Direct Associates LLC, HarbourVest 2007 Direct Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P,. disclaims beneficial ownership of the securities held by HV Ventures and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0001616707-18-000094 · wf-form4_151985428396034.xml · nonDerivative · entry 2

NAYLOR JEFFREY G · CIK 0001191210 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,666

F1 · shares: These shares of Class A Common Stock are issuable upon vesting of a restricted stock unit ("RSU"). The RSU vests upon the satisfaction of a service condition. The service condition is satisfied as to 1/3rd of the shares on February 1, 2019 and as to an additional 1/12th of the shares for each 3-month period of continuous service thereafter.

SEC source: 0001616707-18-000096 · wf-form4_151985459221030.xml · nonDerivative · entry 1

Kumin Michael Andrew · CIK 0001368414 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 159,105

F1 · shares: These shares of Class A Common Stock are issuable upon vesting of a restricted stock unit ("RSU"). The RSU vests upon the satisfaction of a service condition. The service condition is satisfied as to 1/3rd of the shares on February 1, 2019 and as to an additional 1/12th of the shares for each 3-month period of continuous service thereafter.

SEC source: 0001616707-18-000095 · wf-form4_151985449244046.xml · nonDerivative · entry 1

Gamgort Robert James · CIK 0001570836 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,975

F1 · shares: These shares of Class A Common Stock are issuable upon vesting of a restricted stock unit ("RSU"). The RSU vests upon the satisfaction of a service condition. The service condition is satisfied as to 1/3rd of the shares on February 1, 2019 and as to an additional 1/12th of the shares for each 3-month period of continuous service thereafter.

SEC source: 0001616707-18-000098 · wf-form4_151995360155036.xml · nonDerivative · entry 4

Macri Edmond · CIK 0001620023 · Chief Product/Marketing

10b5-1 filing: Not disclosed

Ownership: Indirect · By Revocable Trust

Disclosed balance after: 245,149

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

SEC source: 0001616707-18-000098 · wf-form4_151995360155036.xml · nonDerivative · entry 3

Macri Edmond · CIK 0001620023 · Chief Product/Marketing

10b5-1 filing: Not disclosed

Ownership: Indirect · By Revocable Trust

Disclosed balance after: 245,249

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $74.09 to $75.07, inclusive. The reporting person undertakes to provide to Wayfair Inc., any security holder of Wayfair Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

SEC source: 0000899243-18-005857 · doc4.xml · nonDerivative · entry 3

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 442,285

F7 · price: This transaction was executed in multiple trades at prices ranging from $75.00 to $75.42 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F5 · ownership.direct: These securities are owned solely by HarbourVest Partners 2007 Direct Fund L.P. ("HV Direct"). HarbourVest Partners, LLC is the managing member of HarbourVest 2007 Direct Associates LLC, which is the general partner of HarbourVest 2007 Direct Associates L.P., which is the general partner of HV Direct. Each of HarbourVest Partners, LLC, HarbourVest 2007 Direct Associates LLC and HarbourVest 2007 Direct Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Direct and each disclaims beneficial ownership of the securities held by HV Direct, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F6 · ownership.direct: Each of HV Co-Invest, HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P disclaims beneficial ownership of the securities held by HV Direct and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-005857 · doc4.xml · nonDerivative · entry 2

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 221,143

F7 · price: This transaction was executed in multiple trades at prices ranging from $75.00 to $75.42 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F3 · ownership.direct: These securities are owned solely by HarbourVest/NYSTRS Co-Invest Fund L.P. ("HV Co-Invest"). HarbourVest Partners, LLC is the managing member of HIPEP VI Select Associates LLC, which is the general partner of HIPEP VI Select Associates L.P., which is the general partner of HV Co-Invest. Each of HarbourVest Partners, LLC, HIPEP VI Select Associates LLC and HIPEP VI Select Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Co-Invest and each disclaims beneficial ownership of the securities held by HV Co-Invest, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F4 · ownership.direct: Each of HV Ventures, HarbourVest VIII-Venture Associates LLC, HarbourVest VIII-Venture Associates L.P., HV Direct, HarbourVest 2007 Direct Associates LLC, HarbourVest 2007 Direct Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P disclaims beneficial ownership of the securities held by HV Co-Invest and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0000899243-18-005857 · doc4.xml · nonDerivative · entry 1

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES L.P. · CIK 0001620786 · See Remarks

HARBOURVEST PARTNERS 2007 DIRECT ASSOCIATES LLC · CIK 0001620785 · see remarks

HARBOURVEST PARTNERS 2007 DIRECT FUND L.P. · CIK 0001620787 · see remarks

HARBOURVEST PARTNERS LLC · CIK 0001201001 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES L.P. · CIK 0001620789 · see remarks

HARBOURVEST PARTNERS VIII-VENTURE ASSOCIATES LLC · CIK 0001620788 · see remarks

HarbourVest Partners VIII-Venture Fund L.P. · CIK 0001620790 · see remarks

HarbourVest Partners/NYSTRS Co-Investment Fund L.P. · CIK 0001620791 · see remarks

HIPEP VI Select Associates L.P. · CIK 0001620817 · see remarks

HIPEP VI Select Associates LLC · CIK 0001620816 · see remarks

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

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 221,143

F7 · price: This transaction was executed in multiple trades at prices ranging from $75.00 to $75.42 per share inclusive. The price reported above reflects the weighted average sale price. The reporting persons hereby undertake to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and the prices at which the transaction was effected.

F1 · ownership.direct: These securities are owned solely by HarbourVest Partners VIII-Venture Fund, L.P. ("HV Ventures"). HarbourVest Partners, LLC is the managing member of HarbourVest VIII-Venture Associates LLC, which is the general partner of HarbourVest VIII-Venture Associates L.P., which is the general partner of HV Ventures. Each of HarbourVest Partners, LLC, HarbourVest VIII-Venture Associates LLC and HarbourVest VIII-Venture Associates L.P. may be deemed to have a beneficial interest in the securities held by HV Ventures and each disclaims beneficial ownership of the securities held by HV Ventures, except to the extent of its pecuniary interest which is subject to indeterminable future events.

F2 · ownership.direct: Each of HV Co-Invest (as defined below), HIPEP VI Select Associates LLC, HIPEP VI Select Associates L.P., HV Direct (as defined below), HarbourVest 2007 Direct Associates LLC, HarbourVest 2007 Direct Associates L.P., HV9 (as defined below), HarbourVest IX-Venture Associates LLC, and HarbourVest IX-Venture Associates L.P,. disclaims beneficial ownership of the securities held by HV Ventures and this report shall not be deemed an admission that any such reporting person is the beneficial owner of such securities for purposes of Section 16 of the Securities Exchange Act or for any other purpose.

SEC source: 0001616707-18-000094 · wf-form4_151985428396034.xml · nonDerivative · entry 1

NAYLOR JEFFREY G · CIK 0001191210 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,000