ACMR

SEC source: 0001140361-20-026276 · form4.xml · derivative · entry 3

McKechnie Mark · CIK 0001775007 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,500

Underlying: Class A Common Stock · 7,500 shares

Expires 2029-04-22

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

F1 · kind: On November 19, 2020, the reporting person exercised a previously issued stock option to purchase 7,500 shares of Class A Common Stock of the Issuer.

F3 · derivative.exercise_date: The option vested and became exercisable as to 7,500 shares on April 23, 2020, and the remaining 22,500 shares vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date.

SEC source: 0001140361-20-026276 · form4.xml · nonDerivative · entry 2

McKechnie Mark · CIK 0001775007 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

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

SEC source: 0001140361-20-026276 · form4.xml · nonDerivative · entry 1

McKechnie Mark · CIK 0001775007 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,500

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

F1 · kind: On November 19, 2020, the reporting person exercised a previously issued stock option to purchase 7,500 shares of Class A Common Stock of the Issuer.

SEC source: 0001140361-20-025718 · form4.xml · nonDerivative · entry 2

Cheav Sotheara · CIK 0001721279 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,334

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

SEC source: 0001140361-20-025718 · form4.xml · nonDerivative · entry 1

Cheav Sotheara · CIK 0001721279 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 53,004

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

SEC source: 0001140361-20-025064 · form4.xml · derivative · entry 3

Cheav Sotheara · CIK 0001721279 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 13,334

Underlying: Class A Common Stock · 20,000 shares

Expires 2025-05-01

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

F1 · kind: On November 5, 2020, the reporting person exercised, by net exercise, a previously issued stock option to purchase 20,000 shares of Class A Common Stock of the Issuer. The reporting person paid the exercise price on a cashless basis, resulting in the Issuer withholding 330 shares of Class A Common Stock for payment of the exercise price, based on the closing price of the Issuer's Class A Common Stock on November 4, 2020 of $91.00, and issuing to the reporting person the remaining 19,670 shares of Class A Common Stock.

F2 · derivative.exercise_date: The option is fully vested and exercisable.

SEC source: 0001140361-20-025064 · form4.xml · nonDerivative · entry 2

Cheav Sotheara · CIK 0001721279 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,004

F1 · kind: On November 5, 2020, the reporting person exercised, by net exercise, a previously issued stock option to purchase 20,000 shares of Class A Common Stock of the Issuer. The reporting person paid the exercise price on a cashless basis, resulting in the Issuer withholding 330 shares of Class A Common Stock for payment of the exercise price, based on the closing price of the Issuer's Class A Common Stock on November 4, 2020 of $91.00, and issuing to the reporting person the remaining 19,670 shares of Class A Common Stock.

SEC source: 0001140361-20-025064 · form4.xml · nonDerivative · entry 1

Cheav Sotheara · CIK 0001721279 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,334

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

F1 · kind: On November 5, 2020, the reporting person exercised, by net exercise, a previously issued stock option to purchase 20,000 shares of Class A Common Stock of the Issuer. The reporting person paid the exercise price on a cashless basis, resulting in the Issuer withholding 330 shares of Class A Common Stock for payment of the exercise price, based on the closing price of the Issuer's Class A Common Stock on November 4, 2020 of $91.00, and issuing to the reporting person the remaining 19,670 shares of Class A Common Stock.

SEC source: 0001140361-20-020901 · form4.xml · derivative · entry 3

Feng Lisa · CIK 0001779777 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 15,000

Underlying: Class A Common Stock · 15,000 shares

Expires 2028-01-24

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

F1 · kind: On September 16, 2020, the reporting person exercised a previously issued stock option to purchase 15,000 shares of Class A Common Stock of the Issuer.

F3 · derivative.exercise_date: The option vested and became exercisable as to 7,500 shares on January 1, 2019 and the remaining 22,500 shares vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date.

SEC source: 0001140361-20-020901 · form4.xml · nonDerivative · entry 2

Feng Lisa · CIK 0001779777 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,760

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

SEC source: 0001140361-20-020901 · form4.xml · nonDerivative · entry 1

Feng Lisa · CIK 0001779777 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 25,760

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

F1 · kind: On September 16, 2020, the reporting person exercised a previously issued stock option to purchase 15,000 shares of Class A Common Stock of the Issuer.

SEC source: 0001140361-20-020399 · form4.xml · derivative · entry 6

Cheav Sotheara · CIK 0001721279 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 4,941 shares

Expires 2021-05-01

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 · kind: On September 14, 2020, the reporting person exercised a previously issued stock option to purchase 4,941 shares of Class A Common Stock of the Issuer.

F4 · derivative.exercise_date: The option is fully vested and exercisable.

SEC source: 0001140361-20-020399 · form4.xml · nonDerivative · entry 4

Cheav Sotheara · CIK 0001721279 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,334

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

SEC source: 0001140361-20-020399 · form4.xml · nonDerivative · entry 3

Cheav Sotheara · CIK 0001721279 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,275

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 · kind: On September 14, 2020, the reporting person exercised a previously issued stock option to purchase 4,941 shares of Class A Common Stock of the Issuer.

SEC source: 0001140361-20-020280 · form4.xml · derivative · entry 2

Liu Tracy · CIK 0001721299 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 14,000

Underlying: Class A Common Stock · 6,000 shares

Expires 2029-04-22

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

F1 · kind: On September 10, 2020, the reporting person exercised a previously issued stock option to purchase 6,000 shares of Class A Common Stock of the Issuer.

F2 · derivative.exercise_date: The option vested and became exercisable as to 5,000 shares on April 23, 2020 and the remaining 15,000 shares vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date.

SEC source: 0001140361-20-020280 · form4.xml · nonDerivative · entry 1

Liu Tracy · CIK 0001721299 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 42,924

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

F1 · kind: On September 10, 2020, the reporting person exercised a previously issued stock option to purchase 6,000 shares of Class A Common Stock of the Issuer.

SEC source: 0001140361-20-020399 · form4.xml · derivative · entry 5

Cheav Sotheara · CIK 0001721279 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,941

Underlying: Class A Common Stock · 5,000 shares

Expires 2021-05-01

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

F1 · kind: On September 10, 2020, the reporting person exercised a previously issued stock option to purchase 5,000 shares of Class A Common Stock of the Issuer.

F4 · derivative.exercise_date: The option is fully vested and exercisable.

SEC source: 0001140361-20-020399 · form4.xml · nonDerivative · entry 2

Cheav Sotheara · CIK 0001721279 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,334

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

SEC source: 0001140361-20-020399 · form4.xml · nonDerivative · entry 1

Cheav Sotheara · CIK 0001721279 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,334

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

F1 · kind: On September 10, 2020, the reporting person exercised a previously issued stock option to purchase 5,000 shares of Class A Common Stock of the Issuer.

SEC source: 0001140361-20-020160 · form4.xml · derivative · entry 3

Wang Jian · CIK 0001721620 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 33,334 shares

Expires 2025-05-01

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

F1 · kind: On September 9, 2020, the reporting person exercised, by net exercise, a previously issued stock option to purchase 33,334 shares of Class A Common Stock of the Issuer. The reporting person paid the exercise price on a cashless basis, resulting in the Issuer withholding 848 shares of Class A Common Stock for payment of the exercise price, based on the closing price of the Issuer's Class A Common Stock on September 8, 2020 of $58.97, and issuing to the reporting person the remaining 32,486 shares of Class A Common Stock.

F2 · derivative.exercise_date: The option is fully vested and exercisable.

SEC source: 0001140361-20-020160 · form4.xml · nonDerivative · entry 2

Wang Jian · CIK 0001721620 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 116,872

F1 · kind: On September 9, 2020, the reporting person exercised, by net exercise, a previously issued stock option to purchase 33,334 shares of Class A Common Stock of the Issuer. The reporting person paid the exercise price on a cashless basis, resulting in the Issuer withholding 848 shares of Class A Common Stock for payment of the exercise price, based on the closing price of the Issuer's Class A Common Stock on September 8, 2020 of $58.97, and issuing to the reporting person the remaining 32,486 shares of Class A Common Stock.

SEC source: 0001140361-20-020160 · form4.xml · nonDerivative · entry 1

Wang Jian · CIK 0001721620 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 117,720

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

F1 · kind: On September 9, 2020, the reporting person exercised, by net exercise, a previously issued stock option to purchase 33,334 shares of Class A Common Stock of the Issuer. The reporting person paid the exercise price on a cashless basis, resulting in the Issuer withholding 848 shares of Class A Common Stock for payment of the exercise price, based on the closing price of the Issuer's Class A Common Stock on September 8, 2020 of $58.97, and issuing to the reporting person the remaining 32,486 shares of Class A Common Stock.

SEC source: 0001140361-20-020159 · form4.xml · derivative · entry 2

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 31,102 shares

Expires 2026-12-27

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

F1 · kind: On September 8, 2020, the reporting person exercised a previously issued stock option to purchase 31,102 shares of Class A Common Stock of the Issuer.

F2 · derivative.exercise_date: The option is fully vested.

SEC source: 0001140361-20-020159 · form4.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,102

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

F1 · kind: On September 8, 2020, the reporting person exercised a previously issued stock option to purchase 31,102 shares of Class A Common Stock of the Issuer.

SEC source: 0001140361-20-019835 · form4.xml · nonDerivative · entry 2

Wang David H · CIK 0001721580 · Director · See remarks · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 168,006

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

SEC source: 0001140361-20-019835 · form4.xml · nonDerivative · entry 1

Wang David H · CIK 0001721580 · Director · See remarks · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 217,459

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

SEC source: 0001140361-20-019471 · form4.xml · derivative · entry 7

Wang David H · CIK 0001721580 · Director · See remarks · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,334

Underlying: Class A Common Stock · 70,000 shares

Expires 2021-05-01

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

F1 · kind: On August 27, 2020, the reporting person exercised, by net exercise, a previously issued stock option to purchase 70,000 shares of Class A Common Stock of the Issuer. The reporting person paid the exercise price on a cashless basis, resulting in the Issuer withholding 547 shares of Class A Common Stock for payment of the exercise price, based on the closing price of the Issuer's Class A Common Stock on August 26, 2020 of $96.05, and issuing to the reporting person the remaining 69,453 shares of Class A Common Stock.

F2 · derivative.exercise_date: The option is fully vested and exercisable.

SEC source: 0001140361-20-019471 · form4.xml · nonDerivative · entry 2

Wang David H · CIK 0001721580 · Director · See remarks · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 237,459

F1 · kind: On August 27, 2020, the reporting person exercised, by net exercise, a previously issued stock option to purchase 70,000 shares of Class A Common Stock of the Issuer. The reporting person paid the exercise price on a cashless basis, resulting in the Issuer withholding 547 shares of Class A Common Stock for payment of the exercise price, based on the closing price of the Issuer's Class A Common Stock on August 26, 2020 of $96.05, and issuing to the reporting person the remaining 69,453 shares of Class A Common Stock.

SEC source: 0001140361-20-019471 · form4.xml · nonDerivative · entry 1

Wang David H · CIK 0001721580 · Director · See remarks · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 238,006

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

F1 · kind: On August 27, 2020, the reporting person exercised, by net exercise, a previously issued stock option to purchase 70,000 shares of Class A Common Stock of the Issuer. The reporting person paid the exercise price on a cashless basis, resulting in the Issuer withholding 547 shares of Class A Common Stock for payment of the exercise price, based on the closing price of the Issuer's Class A Common Stock on August 26, 2020 of $96.05, and issuing to the reporting person the remaining 69,453 shares of Class A Common Stock.

SEC source: 0001140361-20-019470 · form4.xml · derivative · entry 3

McKechnie Mark · CIK 0001775007 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,000

Underlying: Class A Common Stock · 4,585 shares

Expires 2028-07-31

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

F1 · kind: On August 27, 2020, the reporting person exercised a previously issued stock option to purchase 4,585 shares of Class A Common Stock of the Issuer.

F3 · derivative.exercise_date: The option vested and became exercisable as to 10,000 shares on August 1, 2019, and the remaining 30,000 shares vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date.

SEC source: 0001140361-20-019470 · form4.xml · nonDerivative · entry 2

McKechnie Mark · CIK 0001775007 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

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

SEC source: 0001140361-20-019470 · form4.xml · nonDerivative · entry 1

McKechnie Mark · CIK 0001775007 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 4,585

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

F1 · kind: On August 27, 2020, the reporting person exercised a previously issued stock option to purchase 4,585 shares of Class A Common Stock of the Issuer.

SEC source: 0001140361-20-017857 · form4.xml · derivative · entry 1

Wang David H · CIK 0001721580 · Director · See remarks · 10% owner

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 181,799

Underlying: Class A Common Stock · 181,799 shares

Expires 2030-03-19

F1 · derivative.exercise_date: On March 20, 2020, the reporting person was granted options to purchase an aggregate of 545,399 shares of the Issuer's Class A common stock, based on the satisfaction of certain performance criteria. In general, one-third of the shares subject to the options vest and become exercisable upon an increase in the Issuer's market capitalization (calculated as described in footnote 2) of $1 billion, $2 billion and $3 billion, respectively, from the market capitalization of $553,383,586 on the date of grant. An initial 181,799 shares vested and became exercisable on August 5, 2020, which was the first trading day as of which the Issuer's market capitalization equaled or exceeded $1,553,383,586. The remaining shares will vest and become exercise in two equal installments upon the first trading days, if any, on which the Issuer's market capitalization equals or exceeds $2,553,383,586 and $3,553,383,586, respectively.

F2 · derivative.exercise_date: For purposes of the options, the market capitalization as of a specified trading day is calculated by multiplying (a) the average of the daily volume-weighted average price per share of the Issuer's Class A common stock for each of the trading days occurring during the thirty calendar day period ending on that specified trading day by (b) the total number of issued and outstanding shares of the Issuer's Class A and Class B common stock as of 11:59 p.m. (Eastern time) on such specified trading day.

SEC source: 0001140361-20-017588 · form4.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

F1 · kind: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

SEC source: 0001140361-20-016099 · form4.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 7,806

F1 · kind: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F2 · price: The price reported in Column 4 represents a weighted average price. The shares were sold in multiple transactions at prices ranging from $83.29 to $85.00, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price.

SEC source: 0001140361-20-014092 · form4.xml · derivative · entry 3

McKechnie Mark · CIK 0001775007 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,585

Underlying: Class A Common Stock · 5,415 shares

Expires 2028-07-31

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

F1 · kind: On June 15, 2020, the reporting person exercised previously issued stock options to purchase 5,415 shares of Class A Common Stock of the Issuer.

F3 · derivative.exercise_date: The option vested and became exercisable as to 10,000 shares on August 1, 2019, and the remaining 30,000 shares vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date.

SEC source: 0001140361-20-014092 · form4.xml · nonDerivative · entry 2

McKechnie Mark · CIK 0001775007 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 0

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

SEC source: 0001140361-20-014092 · form4.xml · nonDerivative · entry 1

McKechnie Mark · CIK 0001775007 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,415

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

F1 · kind: On June 15, 2020, the reporting person exercised previously issued stock options to purchase 5,415 shares of Class A Common Stock of the Issuer.

SEC source: 0001140361-20-013230 · form4.xml · nonDerivative · entry 1

Hu Chenming · CIK 0001316320 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,806

SEC source: 0001140361-20-012483 · form4.xml · derivative · entry 6

Wang David H · CIK 0001721580 · Director · See remarks · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Jing Chen, wife of David H. Wang

Disclosed balance after: 0

Underlying: Class A Common Stock · 33,334 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: Class B Common Stock of the Issuer is convertible into Class A Common Stock of the Issuer on a 1-for-1 basis upon certain transfers of such shares and at the holder's election, and has no expiration date.

F1 · derivative.exercise_date: Class B Common Stock of the Issuer is convertible into Class A Common Stock of the Issuer on a 1-for-1 basis upon certain transfers of such shares and at the holder's election, and has no expiration date.

F1 · derivative.expiration_date: Class B Common Stock of the Issuer is convertible into Class A Common Stock of the Issuer on a 1-for-1 basis upon certain transfers of such shares and at the holder's election, and has no expiration date.

SEC source: 0001140361-20-012483 · form4.xml · nonDerivative · entry 1

Wang David H · CIK 0001721580 · Director · See remarks · 10% owner

10b5-1 filing: Not disclosed

Ownership: Indirect · By Jing Chen, wife of David H. Wang

Disclosed balance after: 33,334

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: 0001140361-20-014945 · form4.xml · derivative · entry 1

Feng Lisa · CIK 0001779777 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,000

Underlying: Class A Common Stock · 10,000 shares

Expires 2030-04-27

F1 · derivative.exercise_date: The option will vest and become exercisable as to 2,500 shares on April 28, 2021 and the remaining 7,500 shares will vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date.

SEC source: 0001140361-20-016100 · form4.xml · nonDerivative · entry 1

Wang Jian · CIK 0001721620 · See remarks

10b5-1 filing: Not disclosed

Ownership: Indirect · By Shengxin (Shanghai) Management Consulting Limited Partnership

Disclosed balance after: 0

F1 · kind: The reporting person resigned from his role as general partner of Shengxin (Shanghai) Management Consulting Limited Partnership ("SMC") effective March 31, 2020 and therefore is no longer deemed to beneficially own securities of the Issuer held by SMC.

SEC source: 0001140361-20-006755 · form4.xml · derivative · entry 1

Liu Tracy · CIK 0001721299 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,000

Underlying: Class A Common Stock · 5,000 shares

Expires 2030-03-19

F1 · derivative.exercise_date: The option will vest and become exercisable immediately prior to the 2021 Annual Meeting of Stockholders of the Issuer, subject to continued service through the vesting date.

SEC source: 0001140361-20-006753 · form4.xml · derivative · entry 1

Dun Haiping · CIK 0001721581 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,000

Underlying: Class A Common Stock · 10,000 shares

Expires 2030-03-19

F1 · derivative.exercise_date: The option will vest and become exercisable as to 5,000 shares immediately prior to the 2020 Annual Meeting of Stockholders of the Issuer and the remaining 5,000 shares will vest and become exercisable immediately prior to the 2021 Annual Meeting of Stockholders of the Issuer, subject to continued service through each vesting date.

SEC source: 0001140361-20-006447 · form4.xml · derivative · entry 2

Liu Tracy · CIK 0001721299 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 30,000

Underlying: Class A Common Stock · 20,000 shares

Expires 2026-12-27

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

F1 · kind: On March 18, 2020, the reporting person exercised previously issued stock options to purchase 20,000 shares of Class A Common Stock of the Issuer.

F2 · derivative.exercise_date: The option vested and became exercisable as to 12,500 shares on September 29, 2017 and the remaining 37,500 shares vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date.

SEC source: 0001140361-20-006447 · form4.xml · nonDerivative · entry 1

Liu Tracy · CIK 0001721299 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 36,924

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

F1 · kind: On March 18, 2020, the reporting person exercised previously issued stock options to purchase 20,000 shares of Class A Common Stock of the Issuer.

SEC source: 0001140361-20-006446 · form4.xml · derivative · entry 2

Feng Lisa · CIK 0001779777 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,907

Underlying: Class A Common Stock · 3,817 shares

Expires 2027-11-01

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

F1 · kind: On March 18, 2020, the reporting person exercised previously issued stock options to purchase 3,817 shares of Class A Common Stock of the Issuer.

F2 · derivative.exercise_date: The option vested and became exercisable as to 4,167 shares on August 15, 2018 and the remaining 12,500 shares vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date.

SEC source: 0001140361-20-006446 · form4.xml · nonDerivative · entry 1

Feng Lisa · CIK 0001779777 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 10,760

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

F1 · kind: On March 18, 2020, the reporting person exercised previously issued stock options to purchase 3,817 shares of Class A Common Stock of the Issuer.

SEC source: 0001140361-19-019960 · form4.xml · derivative · entry 1

McKechnie Mark · CIK 0001775007 · See remarks

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,000

Underlying: Class A Common Stock · 20,000 shares

Expires 2029-11-03

F1 · derivative.exercise_date: The option will vest and become exercisable as to 5,000 shares on November 4, 2020 and the remaining 15,000 shares will vest and become exercisable in equal monthly installments over the following 36 months, subject to continued service through each vesting date.