SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response: 0.5

1. Name and Address of Reporting Person* Beijing Teamsun Technology Co. Ltd. (Last) (First) (Middle) ROOM 501, 5/F, NO. 23 BUILDING 10 E. BLOCK XIBEIWANG EAST RD. (Street) HAIDIAN DISTRICT, BEIJING F4 00000 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 03/05/2020	3. Issuer Name and Ticker or Trading Symbol GRID DYNAMICS HOLDINGS, INC. [ GDYN ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class C Common Stock, par value $0.0001 per share	19,490,295(1)	I(2)(3)	See Footnotes (2) and (3)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person* Beijing Teamsun Technology Co. Ltd. (Last) (First) (Middle) ROOM 501, 5/F, NO. 23 BUILDING 10 E. BLOCK XIBEIWANG EAST RD. (Street) HAIDIAN DISTRICT, BEIJING F4 00000 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Teamsun Technology (HK) Ltd (Last) (First) (Middle) UNIT 907, 9TH FLOOR, TAI YAU BUILDING 181 JOHNSTON ROAD (Street) WANCHAI K3 00000 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Automated Systems Holdings Ltd (Last) (First) (Middle) 15/F., TOPSAIL PLAZA 11 ON SUM STREET (Street) SHATIN K3 00000 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* GDB International Investment Ltd (Last) (First) (Middle) 15/F., TOPSAIL PLAZA 11 ON SUM STREET (Street) SHATIN K3 00000 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* GDD International Holding Co (Last) (First) (Middle) 15/F., TOPSAIL PLAZA 11 ON SUM STREET (Street) SHATIN K3 00000 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. These securities were acquired pursuant to that certain Agreement and Plan of Merger, dated as of November 13, 2019, by and among ChaSerg Technology Acquisition Corp. ("ChaSerg"), CS Merger Sub 1, Inc., a wholly-owned subsidiary of ChaSerg ("Merger Sub 1"), CS Merger Sub 2, LLC, a wholly-owned subsidiary of ChaSerg ("Merger Sub 2"), the Issuer, and Automated Systems Holdings Limited, solely in its capacity as representative of the securityholders of the Issuer immediately prior to the consummation of the business combination.

2. These securities are directly held by GDD International Holding Company ("GDD"), which is a wholly-owned subsidiary of GDB International Investment Limited, which is a wholly-owned subsidiary of Automated Systems Holdings Limited, which is a subsidiary controlled by Teamsun Technology (HK) Limited, which is a wholly-owned subsidiary of Beijing Teamsun Technology Co., Ltd. (collectively, the "Teamsun Entities").

3. Each of the Teamsun Entities may be deemed to beneficially own the securities directly owned by GDD, although each of the Teamsun Entities (other than GDD) disclaims beneficial ownership of such securities, except to the extent of thier respective pecuniary interest therein. Pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons (other than GDD) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

Remarks:

	BEIJING TEAMSUN TECHNOLOGY CO., LTD., By: /s/ Wang Weihang, Director	03/17/2020
	TEAMSUN TECHNOLOGY (HK) LIMITED By: /s/ Wang Weihang, Director	03/17/2020
	AUTOMATED SYSTEMS HOLDINGS LIMITED By: /s/ Wang Yueou, Director	03/17/2020
	GDB INTERNATIONAL INVESTMENT LIMITED By: /s/ Wang Yueou, Director	03/17/2020
	/s/ GDD INTERNATIONAL HOLDING COMPANY By: Wang Yueou, Director	03/17/2020
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.