TAN LIP BU

SEC source: 0001179706-17-000057 · edgar.xml · derivative · entry 2

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 10,253 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer's common stock.

F2 · shares: As previously reported, on 04/25/16 the reporting person was granted 10,169 restricted stock units ("RSUs"), all of which cliff vested on the earlier of 04/25/17 or the date of Issuer's 2017 Annual Stockholders Meeting. The number of RSUs that vested is an estimated amount, subject to change due to the vesting triggered during the Issuer's ex-dividend trading period prior to its spin-off of Everett SpinCo, Inc. on 04/01/17. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The number of derivative securities in column 5 includes 84 vested dividend equivalent rights and a de minimus adjustment of 0.5258 due to fractional rounding of the dividend equivalent rights.

F2 · price: As previously reported, on 04/25/16 the reporting person was granted 10,169 restricted stock units ("RSUs"), all of which cliff vested on the earlier of 04/25/17 or the date of Issuer's 2017 Annual Stockholders Meeting. The number of RSUs that vested is an estimated amount, subject to change due to the vesting triggered during the Issuer's ex-dividend trading period prior to its spin-off of Everett SpinCo, Inc. on 04/01/17. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The number of derivative securities in column 5 includes 84 vested dividend equivalent rights and a de minimus adjustment of 0.5258 due to fractional rounding of the dividend equivalent rights.

F2 · derivative.exercise_date: As previously reported, on 04/25/16 the reporting person was granted 10,169 restricted stock units ("RSUs"), all of which cliff vested on the earlier of 04/25/17 or the date of Issuer's 2017 Annual Stockholders Meeting. The number of RSUs that vested is an estimated amount, subject to change due to the vesting triggered during the Issuer's ex-dividend trading period prior to its spin-off of Everett SpinCo, Inc. on 04/01/17. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The number of derivative securities in column 5 includes 84 vested dividend equivalent rights and a de minimus adjustment of 0.5258 due to fractional rounding of the dividend equivalent rights.

F2 · derivative.expiration_date: As previously reported, on 04/25/16 the reporting person was granted 10,169 restricted stock units ("RSUs"), all of which cliff vested on the earlier of 04/25/17 or the date of Issuer's 2017 Annual Stockholders Meeting. The number of RSUs that vested is an estimated amount, subject to change due to the vesting triggered during the Issuer's ex-dividend trading period prior to its spin-off of Everett SpinCo, Inc. on 04/01/17. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The number of derivative securities in column 5 includes 84 vested dividend equivalent rights and a de minimus adjustment of 0.5258 due to fractional rounding of the dividend equivalent rights.

SEC source: 0001179706-17-000057 · edgar.xml · nonDerivative · entry 1

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,042

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.

SEC source: 0001179706-17-000113 · edgar.xml · derivative · entry 2

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 13,499 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer's common stock.

F2 · shares: As previously reported, on 04/25/16 the reporting person was granted 10,169 restricted stock units ("RSUs"), all of which cliff vested on the earlier of 04/25/17 or the date of Issuer's 2017 Annual Stockholders Meeting. The number of RSUs that vested was an estimated amount, subject to change due to the vesting triggered during the Issuer's ex-dividend trading period prior to its spin-off of Everett SpinCo, Inc. on 04/01/17. The number of RSUs reported in this amendment reflects that conversion adjustment. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The number of derivative securities in column 5 includes 110 vested dividend equivalent rights and a de minimus adjustment of 0.5258 due to fractional rounding of the dividend equivalent rights.

F2 · price: As previously reported, on 04/25/16 the reporting person was granted 10,169 restricted stock units ("RSUs"), all of which cliff vested on the earlier of 04/25/17 or the date of Issuer's 2017 Annual Stockholders Meeting. The number of RSUs that vested was an estimated amount, subject to change due to the vesting triggered during the Issuer's ex-dividend trading period prior to its spin-off of Everett SpinCo, Inc. on 04/01/17. The number of RSUs reported in this amendment reflects that conversion adjustment. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The number of derivative securities in column 5 includes 110 vested dividend equivalent rights and a de minimus adjustment of 0.5258 due to fractional rounding of the dividend equivalent rights.

F2 · derivative.exercise_date: As previously reported, on 04/25/16 the reporting person was granted 10,169 restricted stock units ("RSUs"), all of which cliff vested on the earlier of 04/25/17 or the date of Issuer's 2017 Annual Stockholders Meeting. The number of RSUs that vested was an estimated amount, subject to change due to the vesting triggered during the Issuer's ex-dividend trading period prior to its spin-off of Everett SpinCo, Inc. on 04/01/17. The number of RSUs reported in this amendment reflects that conversion adjustment. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The number of derivative securities in column 5 includes 110 vested dividend equivalent rights and a de minimus adjustment of 0.5258 due to fractional rounding of the dividend equivalent rights.

F2 · derivative.expiration_date: As previously reported, on 04/25/16 the reporting person was granted 10,169 restricted stock units ("RSUs"), all of which cliff vested on the earlier of 04/25/17 or the date of Issuer's 2017 Annual Stockholders Meeting. The number of RSUs that vested was an estimated amount, subject to change due to the vesting triggered during the Issuer's ex-dividend trading period prior to its spin-off of Everett SpinCo, Inc. on 04/01/17. The number of RSUs reported in this amendment reflects that conversion adjustment. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The number of derivative securities in column 5 includes 110 vested dividend equivalent rights and a de minimus adjustment of 0.5258 due to fractional rounding of the dividend equivalent rights.

SEC source: 0001179706-17-000113 · edgar.xml · nonDerivative · entry 1

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,288

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.

SEC source: 0000899243-17-008030 · doc4.xml · derivative · entry 3

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 1,452

Underlying: Ordinary Shares · 726 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

F3 · derivative.exercise_date: Of the total of 2,904 shares granted, The restricted stock units vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2016, so as to be 100% vested on September 15, 2017.

F3 · derivative.expiration_date: Of the total of 2,904 shares granted, The restricted stock units vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2016, so as to be 100% vested on September 15, 2017.

SEC source: 0000899243-17-008030 · doc4.xml · nonDerivative · entry 1

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,147

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

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

SEC source: 0001209191-17-021563 · doc4.xml · derivative · entry 8

TAN LIP BU · CIK 0001008463 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 700,000

Underlying: Common Stock · 100,000 shares

Expires 2018-02-08

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.

SEC source: 0001209191-17-021563 · doc4.xml · nonDerivative · entry 7

TAN LIP BU · CIK 0001008463 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 483,332

F6 · shares: The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person.

SEC source: 0001209191-17-021563 · doc4.xml · nonDerivative · entry 6

TAN LIP BU · CIK 0001008463 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 583,332

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.

SEC source: 0001179706-17-000022 · edgar.xml · nonDerivative · entry 1

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 8,789

F1 · price: These shares were issued to the reporting person pursuant to the Issuer's 2015 Stock Incentive Plan in lieu of Q4 cash retainer and chairman fees of $25,000 for Issuer's Board Year 2016.

SEC source: 0001209191-17-014065 · doc4.xml · derivative · entry 11

TAN LIP BU · CIK 0001008463 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 425,000

Underlying: Common Stock · 425,000 shares

Expires 2024-02-21

F8 · shares: Option vests at a rate of 1/48th per month.

SEC source: 0001209191-17-014065 · doc4.xml · nonDerivative · entry 10

TAN LIP BU · CIK 0001008463 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 483,332

F7 · shares: Grant of performance-based incentive stock.

SEC source: 0001209191-17-014065 · doc4.xml · nonDerivative · entry 9

TAN LIP BU · CIK 0001008463 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 383,332

F7 · shares: Grant of performance-based incentive stock.

SEC source: 0001209191-17-014065 · doc4.xml · nonDerivative · entry 8

TAN LIP BU · CIK 0001008463 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust 2

Disclosed balance after: 1,048,180

F6 · ownership.nature: Shares held by the Lip-Bu Tan and Ysa Loo Trust dated 2/3/1992.

SEC source: 0001209191-17-014065 · doc4.xml · nonDerivative · entry 7

TAN LIP BU · CIK 0001008463 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 308,332

F4 · shares: Shares transferred to the Lip-Bu Tan and Ysa Loo Trust dated 2/3/1992.

SEC source: 0001209191-17-014065 · doc4.xml · nonDerivative · entry 6

TAN LIP BU · CIK 0001008463 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust 2

Disclosed balance after: 989,847

F6 · ownership.nature: Shares held by the Lip-Bu Tan and Ysa Loo Trust dated 2/3/1992.

SEC source: 0001209191-17-014065 · doc4.xml · nonDerivative · entry 5

TAN LIP BU · CIK 0001008463 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 366,665

F4 · shares: Shares transferred to the Lip-Bu Tan and Ysa Loo Trust dated 2/3/1992.

F5 · balance_after: The Reporting Person acquired 389 shares through the Employee Stock Purchase Plan on January 31, 2017.

SEC source: 0001179706-17-000022 · edgar.xml · derivative · entry 2

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,252.4742

Underlying: Common Stock · 28.187 shares

Expires not disclosed

F2 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer's common stock.

F3 · shares: As previously reported, on 04/25/16 the reporting person was granted 10,169 restricted stock units ("RSUs"), all of which will cliff vest on the earlier of 04/25/17 or the date of Issuer's 2017 Annual Stockholders Meeting. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The number of derivative securities in column 5 includes 28.1870 dividend equivalent rights at $23.45 per RSU credited to the reporting person's account on 01/04/17.

F3 · price: As previously reported, on 04/25/16 the reporting person was granted 10,169 restricted stock units ("RSUs"), all of which will cliff vest on the earlier of 04/25/17 or the date of Issuer's 2017 Annual Stockholders Meeting. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The number of derivative securities in column 5 includes 28.1870 dividend equivalent rights at $23.45 per RSU credited to the reporting person's account on 01/04/17.

F3 · derivative.exercise_date: As previously reported, on 04/25/16 the reporting person was granted 10,169 restricted stock units ("RSUs"), all of which will cliff vest on the earlier of 04/25/17 or the date of Issuer's 2017 Annual Stockholders Meeting. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The number of derivative securities in column 5 includes 28.1870 dividend equivalent rights at $23.45 per RSU credited to the reporting person's account on 01/04/17.

F3 · derivative.expiration_date: As previously reported, on 04/25/16 the reporting person was granted 10,169 restricted stock units ("RSUs"), all of which will cliff vest on the earlier of 04/25/17 or the date of Issuer's 2017 Annual Stockholders Meeting. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The number of derivative securities in column 5 includes 28.1870 dividend equivalent rights at $23.45 per RSU credited to the reporting person's account on 01/04/17.

SEC source: 0000899243-16-035851 · doc4.xml · derivative · entry 3

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,178

Underlying: Ordinary Shares · 726 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

F3 · derivative.exercise_date: Of the total of 2,904 shares granted, The restricted stock units vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2016, so as to be 100% vested on September 15, 2017.

F3 · derivative.expiration_date: Of the total of 2,904 shares granted, The restricted stock units vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2016, so as to be 100% vested on September 15, 2017.

SEC source: 0000899243-16-035851 · doc4.xml · nonDerivative · entry 1

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,421

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

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

SEC source: 0001209191-16-155737 · doc4.xml · derivative · entry 8

TAN LIP BU · CIK 0001008463 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 100,000 shares

Expires 2017-02-08

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.

SEC source: 0001209191-16-155737 · doc4.xml · nonDerivative · entry 7

TAN LIP BU · CIK 0001008463 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 366,665

F6 · shares: The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person.

SEC source: 0001209191-16-155737 · doc4.xml · nonDerivative · entry 6

TAN LIP BU · CIK 0001008463 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 466,665

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.

SEC source: 0001209191-16-155737 · doc4.xml · nonDerivative · entry 5

TAN LIP BU · CIK 0001008463 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Trust 2

Disclosed balance after: 989,458

F4 · shares: Shares transferred as bona fide gifts from the Lip-Bu Tan and Ysa Loo Trust dated 2/3/1992.

F5 · ownership.nature: Shares held by the Lip-Bu Tan and Ysa Loo Trust dated 2/3/1992.

SEC source: 0001179706-16-000538 · edgar.xml · nonDerivative · entry 1

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,694

F1 · price: These shares were issued to the reporting person pursuant to the Issuer's 2015 Stock Incentive Plan in lieu of Q3 cash retainer and chairman fees of $25,000 for Issuer's Board Year 2016.

SEC source: 0001179706-16-000518 · edgar.xml · derivative · entry 2

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,128 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer's common stock.

F2 · shares: As previously reported, on 11/11/15 the reporting person was granted 4,078 restricted stock units ("RSUs"), all of which cliff vested on 11/11/16, at which time the vested shares were delivered to the reporting person. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The number of derivative securities in column 5 includes 9.9818 dividend equivalent rights at $22.47 per RSU credited to the reporting person's account on 10/31/16. The number of derivative securities in column 5 includes 50 vested dividend equivalent rights and a de minimus adjustment of 0.1855 due to fractional rounding of the dividend equivalent rights.

F2 · price: As previously reported, on 11/11/15 the reporting person was granted 4,078 restricted stock units ("RSUs"), all of which cliff vested on 11/11/16, at which time the vested shares were delivered to the reporting person. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The number of derivative securities in column 5 includes 9.9818 dividend equivalent rights at $22.47 per RSU credited to the reporting person's account on 10/31/16. The number of derivative securities in column 5 includes 50 vested dividend equivalent rights and a de minimus adjustment of 0.1855 due to fractional rounding of the dividend equivalent rights.

F2 · derivative.exercise_date: As previously reported, on 11/11/15 the reporting person was granted 4,078 restricted stock units ("RSUs"), all of which cliff vested on 11/11/16, at which time the vested shares were delivered to the reporting person. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The number of derivative securities in column 5 includes 9.9818 dividend equivalent rights at $22.47 per RSU credited to the reporting person's account on 10/31/16. The number of derivative securities in column 5 includes 50 vested dividend equivalent rights and a de minimus adjustment of 0.1855 due to fractional rounding of the dividend equivalent rights.

F2 · derivative.expiration_date: As previously reported, on 11/11/15 the reporting person was granted 4,078 restricted stock units ("RSUs"), all of which cliff vested on 11/11/16, at which time the vested shares were delivered to the reporting person. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The number of derivative securities in column 5 includes 9.9818 dividend equivalent rights at $22.47 per RSU credited to the reporting person's account on 10/31/16. The number of derivative securities in column 5 includes 50 vested dividend equivalent rights and a de minimus adjustment of 0.1855 due to fractional rounding of the dividend equivalent rights.

SEC source: 0001179706-16-000518 · edgar.xml · nonDerivative · entry 1

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,644

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.

SEC source: 0001209191-16-148513 · doc4.xml · derivative · entry 5

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 294,757 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: The Series G Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date.

F3 · derivative.exercise_date: The Series G Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date.

F3 · derivative.expiration_date: The Series G Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date.

F5 · ownership.nature: Shares held by WRV II, L.P. ("WRV II"). The general partner for WRV II is WRV GP II, LLC ("WRV II GP"). Lip-Bu Tan, Michael Marks, and Nicholas Braithwaite are members of the investment committee of WRV II GP and share voting and investment power with respect to the shares held by WRV II.

SEC source: 0001209191-16-148513 · doc4.xml · derivative · entry 4

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 0

Underlying: Common Stock · 294,757 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: The Series G Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date.

F3 · derivative.exercise_date: The Series G Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date.

F3 · derivative.expiration_date: The Series G Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date.

F4 · ownership.nature: Shares held by China Walden Venture Investments II, L.P. ("CWVI II"). The general partner of CWVI II is China Walden Venture Investment II G.P., Ltd. ("CWVI II GP"). Lip-Bu Tan and Hing Wong are members of the investment committee of CWVI II GP and share voting and investment power with respect to the shares held by CWVI II.

SEC source: 0001209191-16-148513 · doc4.xml · nonDerivative · entry 3

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 294,757

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 · price: The Series G Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date.

F5 · ownership.nature: Shares held by WRV II, L.P. ("WRV II"). The general partner for WRV II is WRV GP II, LLC ("WRV II GP"). Lip-Bu Tan, Michael Marks, and Nicholas Braithwaite are members of the investment committee of WRV II GP and share voting and investment power with respect to the shares held by WRV II.

SEC source: 0001209191-16-148513 · doc4.xml · nonDerivative · entry 2

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 294,757

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 · price: The Series G Preferred Stock automatically converted into Common Stock on a 1:1 basis immediately prior to the closing of the Issuer's initial public offering and had no expiration date.

F4 · ownership.nature: Shares held by China Walden Venture Investments II, L.P. ("CWVI II"). The general partner of CWVI II is China Walden Venture Investment II G.P., Ltd. ("CWVI II GP"). Lip-Bu Tan and Hing Wong are members of the investment committee of CWVI II GP and share voting and investment power with respect to the shares held by CWVI II.

SEC source: 0001209191-16-148513 · doc4.xml · nonDerivative · entry 1

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · By trust

Disclosed balance after: 10,000

F1 · kind: Represents a purchase from the underwriters pursuant to participation in the directed share program in connection with the initial public offering of the Issuer's Common Stock.

F2 · ownership.nature: Shares held by Lip-Bu Tan and Ysa Loo, TTEES, FBO Lip-Bu Tan and Ysa Loo Trust DTD 2/3/1992.

SEC source: 0001179706-16-000518 · edgar.xml · derivative · entry 3

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,224.2872

Underlying: Common Stock · 24.8907 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Issuer's common stock.

F3 · shares: On 04/25/16 the reporting person was granted 10,169 RSUs, all of which will cliff vest on the earlier of 04/25/17 or the date of Issuer's 2017 Annual Stockholders Meeting. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The 24.8907 dividend equivalent rights being reported reflect 24.8907 dividend equivalent rights at $22.47 per RSU credited to the reporting person's account on 10/31/16.

F3 · price: On 04/25/16 the reporting person was granted 10,169 RSUs, all of which will cliff vest on the earlier of 04/25/17 or the date of Issuer's 2017 Annual Stockholders Meeting. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The 24.8907 dividend equivalent rights being reported reflect 24.8907 dividend equivalent rights at $22.47 per RSU credited to the reporting person's account on 10/31/16.

F3 · derivative.exercise_date: On 04/25/16 the reporting person was granted 10,169 RSUs, all of which will cliff vest on the earlier of 04/25/17 or the date of Issuer's 2017 Annual Stockholders Meeting. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The 24.8907 dividend equivalent rights being reported reflect 24.8907 dividend equivalent rights at $22.47 per RSU credited to the reporting person's account on 10/31/16.

F3 · derivative.expiration_date: On 04/25/16 the reporting person was granted 10,169 RSUs, all of which will cliff vest on the earlier of 04/25/17 or the date of Issuer's 2017 Annual Stockholders Meeting. Dividend equivalent rights accrue with respect to these RSUs when and as dividends are paid on Issuer's common stock. The 24.8907 dividend equivalent rights being reported reflect 24.8907 dividend equivalent rights at $22.47 per RSU credited to the reporting person's account on 10/31/16.

SEC source: 0001209191-16-146376 · doc4.xml · derivative · entry 8

TAN LIP BU · CIK 0001008463 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 100,000

Underlying: Common Stock · 100,000 shares

Expires 2017-02-08

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.

SEC source: 0001209191-16-146376 · doc4.xml · nonDerivative · entry 7

TAN LIP BU · CIK 0001008463 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 366,665

F5 · shares: The transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 Trading Plan adopted by the Reporting Person.

SEC source: 0001209191-16-146376 · doc4.xml · nonDerivative · entry 6

TAN LIP BU · CIK 0001008463 · Director · President & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 466,665

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.

SEC source: 0000899243-16-029455 · doc4.xml · derivative · entry 3

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Ordinary Shares · 1,153 shares

Expires not disclosed

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

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

F3 · derivative.exercise_date: Of the total of 4,611 shares granted, the restricted stock units vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2015, so as to be 100% vested on September 15, 2016.

F3 · derivative.expiration_date: Of the total of 4,611 shares granted, the restricted stock units vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2015, so as to be 100% vested on September 15, 2016.

SEC source: 0000899243-16-029455 · doc4.xml · nonDerivative · entry 1

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,695

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

F1 · price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

SEC source: 0000899243-16-028727 · doc4.xml · derivative · entry 1

TAN LIP BU · CIK 0001008463 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,904

Underlying: Ordinary Shares · 2,904 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit represents a contingent right to receive one share of Ambarella, Inc. Ordinary Shares.

F2 · derivative.exercise_date: The restricted stock units vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2016, so as to be 100% vested on September 15, 2017.

F2 · derivative.expiration_date: The restricted stock units vest as to 1/4th of the restricted stock units each three months following the vesting start date of September 15, 2016, so as to be 100% vested on September 15, 2017.