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This Amendment No. 2 (Amendment No. 2) is filed pursuant to Rule 13d-2(b) promulgated under the Securities Exchange Act of 1934, as amended, with respect to the Class A Common Stock, par value $0.0001 per share (the Shares), of Grid Dynamics Holdings, Inc.
(formerly named ChaSerg Technology Acquisition Corp.) (the Issuer) beneficially owned by the Reporting Persons specified herein as of December 31, 2020, and amends and supplements the Schedule 13G filed November 18, 2019, as
amended by Amendment No. 1 thereto filed January 14, 2020 (collectively, the Schedule 13G). Except as set forth herein, the Schedule 13G is unmodified.
The names of the persons filing this statement on Amendment No. 2 are: Linden Capital L.P., a Bermuda limited partnership (Linden
Capital), Linden Advisors LP, a Delaware limited partnership (Linden Advisors), Linden GP LLC, a Delaware limited liability company (Linden GP), and Mr. Siu Min (Joe) Wong (Mr. Wong, and
collectively, the Reporting Persons).
Item 4. Ownership:
As of December 31, 2020, the Reporting Persons have ceased to be the beneficial owner of more than five percent of the outstanding Shares.
Item 5. Ownership of Five Percent or Less of a Class:
If this statement is being filed to report the fact that as of the date hereof the Reporting Persons have ceased to be the beneficial owner of
more than five percent of the class of securities, check the following ☒.
Item 10. Certification:
By signing below, the undersigned certifies that, to the best of its knowledge and belief, the securities referred to above were not acquired
and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or
effect, other than activities solely in connection with a nomination under Sec. 240.14a-11.