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GRID DYNAMICS HOLDINGS, INC.

For the period ended Dec 31, 2025. Filed Mar 5, 2026.

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A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Mar 5, 2026

GDYN$13.30+1.5%Stored close · as of Nov 9, 2026

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Contents

Item 9B. Other Information

Insider Trading Arrangements

On November 13, 2025, Yury Gryzlov, our Chief Operating Officer, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of up to 237,666 shares of our common stock, less shares forfeited for tax withholding. The trading arrangement was intended to satisfy the affirmative defense under Rule 10b5-1(c) under the Securities Exchange Act. Shares may be sold pursuant to the plan until March 3, 2027, or earlier if all sales under the plan were completed.

No other Rule 10b5-1 trading plans or non-Rule 10b5-1 trading arrangements were adopted orterminated by our directors or executive officers during the three months ended December 31, 2025.

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