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Fox Trust."}],"balance_after":79206,"source":{"system":"sec-edgar","filing":"0001209191-21-068613","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1805664/000120919121068613/doc4.xml","form_type":"4"}},{"id":2480875,"issuer":{"id":2031,"kind":"organization","name":"GRID DYNAMICS HOLDINGS, INC.","symbol":"GDYN"},"owners":[{"id":113805,"kind":"person","name":"Klimoff Stan","position":1,"cik":"0001805664","reported_name":"Klimoff Stan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Common Stock","published_at":"2021-12-08T19:23:36.000Z","date":"2021-12-06","kind":"sale","acquired":false,"shares":1496,"price":37.8403,"value":56609.0888,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2021 by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $37.67 to $38.175. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price."}],"balance_after":170639,"source":{"system":"sec-edgar","filing":"0001209191-21-068613","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1805664/000120919121068613/doc4.xml","form_type":"4"}},{"id":2480874,"issuer":{"id":2031,"kind":"organization","name":"GRID DYNAMICS HOLDINGS, INC.","symbol":"GDYN"},"owners":[{"id":113805,"kind":"person","name":"Klimoff Stan","position":1,"cik":"0001805664","reported_name":"Klimoff Stan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Common Stock","published_at":"2021-12-08T19:23:36.000Z","date":"2021-12-06","kind":"sale","acquired":false,"shares":2504,"price":36.8853,"value":92360.7912,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2021 by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $36.65 to $37.28. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price."}],"balance_after":172135,"source":{"system":"sec-edgar","filing":"0001209191-21-068613","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1805664/000120919121068613/doc4.xml","form_type":"4"}},{"id":2521527,"issuer":{"id":2031,"kind":"organization","name":"GRID DYNAMICS HOLDINGS, INC.","symbol":"GDYN"},"owners":[{"id":113805,"kind":"person","name":"Klimoff Stan","position":1,"cik":"0001805664","reported_name":"Klimoff Stan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Common Stock","published_at":"2021-11-08T18:45:48.000Z","date":"2021-11-05","kind":"sale","acquired":false,"shares":50,"price":38.08,"value":1904.0,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2021 by the O. Fox Charitable Trust for which the Reporting Person serves as trustee (the \"O. Fox Trust\")."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"The shares are held of record by the O. Fox Trust."}],"balance_after":81084,"source":{"system":"sec-edgar","filing":"0001209191-21-063454","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1805664/000120919121063454/doc4.xml","form_type":"4"}},{"id":2521526,"issuer":{"id":2031,"kind":"organization","name":"GRID DYNAMICS HOLDINGS, INC.","symbol":"GDYN"},"owners":[{"id":113805,"kind":"person","name":"Klimoff Stan","position":1,"cik":"0001805664","reported_name":"Klimoff Stan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Common Stock","published_at":"2021-11-08T18:45:48.000Z","date":"2021-11-05","kind":"sale","acquired":false,"shares":450,"price":37.2833,"value":16777.485,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2021 by the O. Fox Charitable Trust for which the Reporting Person serves as trustee (the \"O. Fox Trust\")."},{"field":"price","element":"transactionPricePerShare","label":"F11","text":"This transaction was executed in multiple trades at prices ranging from $36.86 to $37.83. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"The shares are held of record by the O. Fox Trust."}],"balance_after":81134,"source":{"system":"sec-edgar","filing":"0001209191-21-063454","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1805664/000120919121063454/doc4.xml","form_type":"4"}},{"id":2521525,"issuer":{"id":2031,"kind":"organization","name":"GRID DYNAMICS HOLDINGS, INC.","symbol":"GDYN"},"owners":[{"id":113805,"kind":"person","name":"Klimoff Stan","position":1,"cik":"0001805664","reported_name":"Klimoff Stan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Common Stock","published_at":"2021-11-08T18:45:48.000Z","date":"2021-11-05","kind":"sale","acquired":false,"shares":1592,"price":35.4072,"value":56368.2624,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2021 by the O. Fox Charitable Trust for which the Reporting Person serves as trustee (the \"O. Fox Trust\")."},{"field":"price","element":"transactionPricePerShare","label":"F10","text":"This transaction was executed in multiple trades at prices ranging from $35.04 to $36.03. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"The shares are held of record by the O. Fox Trust."}],"balance_after":81584,"source":{"system":"sec-edgar","filing":"0001209191-21-063454","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1805664/000120919121063454/doc4.xml","form_type":"4"}},{"id":2521524,"issuer":{"id":2031,"kind":"organization","name":"GRID DYNAMICS HOLDINGS, INC.","symbol":"GDYN"},"owners":[{"id":113805,"kind":"person","name":"Klimoff Stan","position":1,"cik":"0001805664","reported_name":"Klimoff Stan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Common Stock","published_at":"2021-11-08T18:45:48.000Z","date":"2021-11-05","kind":"sale","acquired":false,"shares":908,"price":34.6619,"value":31473.0052,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2021 by the O. Fox Charitable Trust for which the Reporting Person serves as trustee (the \"O. Fox Trust\")."},{"field":"price","element":"transactionPricePerShare","label":"F8","text":"This transaction was executed in multiple trades at prices ranging from $34.03 to $35.00. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F9","text":"The shares are held of record by the O. Fox Trust."}],"balance_after":83176,"source":{"system":"sec-edgar","filing":"0001209191-21-063454","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1805664/000120919121063454/doc4.xml","form_type":"4"}},{"id":2521523,"issuer":{"id":2031,"kind":"organization","name":"GRID DYNAMICS HOLDINGS, INC.","symbol":"GDYN"},"owners":[{"id":113805,"kind":"person","name":"Klimoff Stan","position":1,"cik":"0001805664","reported_name":"Klimoff Stan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Common Stock","published_at":"2021-11-08T18:45:48.000Z","date":"2021-11-05","kind":"sale","acquired":false,"shares":50,"price":39.86,"value":1993.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2021 by the Reporting Person."}],"balance_after":174639,"source":{"system":"sec-edgar","filing":"0001209191-21-063454","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1805664/000120919121063454/doc4.xml","form_type":"4"}},{"id":2521522,"issuer":{"id":2031,"kind":"organization","name":"GRID DYNAMICS HOLDINGS, INC.","symbol":"GDYN"},"owners":[{"id":113805,"kind":"person","name":"Klimoff Stan","position":1,"cik":"0001805664","reported_name":"Klimoff Stan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Common Stock","published_at":"2021-11-08T18:45:48.000Z","date":"2021-11-05","kind":"sale","acquired":false,"shares":250,"price":37.677,"value":9419.25,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2021 by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"This transaction was executed in multiple trades at prices ranging from $37.355 to $37.93. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price."}],"balance_after":174689,"source":{"system":"sec-edgar","filing":"0001209191-21-063454","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1805664/000120919121063454/doc4.xml","form_type":"4"}},{"id":2521521,"issuer":{"id":2031,"kind":"organization","name":"GRID DYNAMICS HOLDINGS, INC.","symbol":"GDYN"},"owners":[{"id":113805,"kind":"person","name":"Klimoff Stan","position":1,"cik":"0001805664","reported_name":"Klimoff Stan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Common Stock","published_at":"2021-11-08T18:45:48.000Z","date":"2021-11-05","kind":"sale","acquired":false,"shares":400,"price":36.75,"value":14700.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2021 by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"This transaction was executed in multiple trades at prices ranging from $36.31 to $37.01. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price."}],"balance_after":174939,"source":{"system":"sec-edgar","filing":"0001209191-21-063454","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1805664/000120919121063454/doc4.xml","form_type":"4"}},{"id":2521520,"issuer":{"id":2031,"kind":"organization","name":"GRID DYNAMICS HOLDINGS, INC.","symbol":"GDYN"},"owners":[{"id":113805,"kind":"person","name":"Klimoff Stan","position":1,"cik":"0001805664","reported_name":"Klimoff Stan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Common Stock","published_at":"2021-11-08T18:45:48.000Z","date":"2021-11-05","kind":"sale","acquired":false,"shares":1799,"price":35.4524,"value":63778.8676,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2021 by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades at prices ranging from $35.13 to $36.02. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price."}],"balance_after":175339,"source":{"system":"sec-edgar","filing":"0001209191-21-063454","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1805664/000120919121063454/doc4.xml","form_type":"4"}},{"id":2521519,"issuer":{"id":2031,"kind":"organization","name":"GRID DYNAMICS HOLDINGS, INC.","symbol":"GDYN"},"owners":[{"id":113805,"kind":"person","name":"Klimoff Stan","position":1,"cik":"0001805664","reported_name":"Klimoff Stan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Common Stock","published_at":"2021-11-08T18:45:48.000Z","date":"2021-11-05","kind":"sale","acquired":false,"shares":1501,"price":34.735,"value":52137.235,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2021 by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"This transaction was executed in multiple trades at prices ranging from $34.11 to $35.08. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price."}],"balance_after":177138,"source":{"system":"sec-edgar","filing":"0001209191-21-063454","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1805664/000120919121063454/doc4.xml","form_type":"4"}},{"id":2521518,"issuer":{"id":2031,"kind":"organization","name":"GRID DYNAMICS HOLDINGS, INC.","symbol":"GDYN"},"owners":[{"id":113805,"kind":"person","name":"Klimoff Stan","position":1,"cik":"0001805664","reported_name":"Klimoff Stan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Common Stock","published_at":"2021-11-08T18:45:48.000Z","date":"2021-11-04","kind":"tax_withholding","acquired":false,"shares":2303,"price":29.23,"value":67316.69,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares that have been withheld by the Issuer to satisfy tax withholding and remittance obligations in connection with the net settlement of restricted stock units."}],"balance_after":178639,"source":{"system":"sec-edgar","filing":"0001209191-21-063454","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1805664/000120919121063454/doc4.xml","form_type":"4"}},{"id":2539436,"issuer":{"id":2031,"kind":"organization","name":"GRID DYNAMICS HOLDINGS, INC.","symbol":"GDYN"},"owners":[{"id":113805,"kind":"person","name":"Klimoff Stan","position":1,"cik":"0001805664","reported_name":"Klimoff Stan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Common Stock","published_at":"2021-10-19T18:31:22.000Z","date":"2021-10-15","kind":"other","acquired":true,"shares":625,"price":10.19,"value":6368.75,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On October 15, 2021, the Reporting Person received these shares of the Issuer's common stock pursuant to an \"earn-out\" provision in Section 2.19(e)(ii) of that certain Agreement and Plan of Merger (the \"Merger Agreement\") dated as of November 13, 2019 by and among the Issuer and the parties listed in the Merger Agreement."},{"field":"kind","element":"transactionCoding","label":"F2","text":"(continuation from footnote 1)  The Merger Agreement provided that if, after preparing the \"Closing Statement\" required by the Merger Agreement, the \"Post-Closing Adjustment\" (which generally relates to cash accounts, working capital and indebtedness at the \"Closing Date\") was a positive number, the Issuer would be required to issue that number of new shares of common stock of the Issuer equal to the Post-Closing Adjustment divided by the \"Parent Stock Signing Price\" (i.e. $10.19), and to deposit such shares with the \"Exchange Agent\" for distribution to the \"Shareholders\" in accordance with their \"Shareholder Pro Rata Shares\" (as each such term is defined in the Merger Agreement), for no additional consideration."},{"field":"kind","element":"transactionCoding","label":"F3","text":"(continuation from footnote 2)  The Reporting Person's right to receive such additional shares in a non-market manner for no additional consideration became fixed and irrevocable on March 5, 2020, the effective date of the merger. Accordingly, by law, the date of acquisition of such earn-out shares for purposes of Section 16(b) is March 5, 2020, the effective date of the merger."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On October 15, 2021, the Reporting Person received these shares of the Issuer's common stock pursuant to an \"earn-out\" provision in Section 2.19(e)(ii) of that certain Agreement and Plan of Merger (the \"Merger Agreement\") dated as of November 13, 2019 by and among the Issuer and the parties listed in the Merger Agreement."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"(continuation from footnote 1)  The Merger Agreement provided that if, after preparing the \"Closing Statement\" required by the Merger Agreement, the \"Post-Closing Adjustment\" (which generally relates to cash accounts, working capital and indebtedness at the \"Closing Date\") was a positive number, the Issuer would be required to issue that number of new shares of common stock of the Issuer equal to the Post-Closing Adjustment divided by the \"Parent Stock Signing Price\" (i.e. $10.19), and to deposit such shares with the \"Exchange Agent\" for distribution to the \"Shareholders\" in accordance with their \"Shareholder Pro Rata Shares\" (as each such term is defined in the Merger Agreement), for no additional consideration."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"(continuation from footnote 2)  The Reporting Person's right to receive such additional shares in a non-market manner for no additional consideration became fixed and irrevocable on March 5, 2020, the effective date of the merger. Accordingly, by law, the date of acquisition of such earn-out shares for purposes of Section 16(b) is March 5, 2020, the effective date of the merger."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"The shares are held of record by the O. Fox Charitable Trust for which the Reporting Person serves as trustee."}],"balance_after":84084,"source":{"system":"sec-edgar","filing":"0001209191-21-061001","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1805664/000120919121061001/doc4.xml","form_type":"4"}},{"id":2546495,"issuer":{"id":2031,"kind":"organization","name":"GRID DYNAMICS HOLDINGS, INC.","symbol":"GDYN"},"owners":[{"id":113805,"kind":"person","name":"Klimoff Stan","position":1,"cik":"0001805664","reported_name":"Klimoff Stan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Common Stock","published_at":"2021-10-07T16:27:35.000Z","date":"2021-10-05","kind":"sale","acquired":false,"shares":3000,"price":28.1619,"value":84485.7,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2021 by the O. Fox Charitable Trust for which the Reporting Person serves as trustee (the \"O. Fox Trust\")."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades at prices ranging from $28.00 to $28.32. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The shares are held of record by the O. Fox Trust."}],"balance_after":83459,"source":{"system":"sec-edgar","filing":"0001209191-21-059930","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1805664/000120919121059930/doc4.xml","form_type":"4"}},{"id":2546494,"issuer":{"id":2031,"kind":"organization","name":"GRID DYNAMICS HOLDINGS, INC.","symbol":"GDYN"},"owners":[{"id":113805,"kind":"person","name":"Klimoff Stan","position":1,"cik":"0001805664","reported_name":"Klimoff Stan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Common Stock","published_at":"2021-10-07T16:27:35.000Z","date":"2021-10-05","kind":"sale","acquired":false,"shares":4000,"price":28.19,"value":112760.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2021 by the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"This transaction was executed in multiple trades at prices ranging from $27.99 to $28.41. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price."}],"balance_after":180942,"source":{"system":"sec-edgar","filing":"0001209191-21-059930","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1805664/000120919121059930/doc4.xml","form_type":"4"}},{"id":2569506,"issuer":{"id":2031,"kind":"organization","name":"GRID DYNAMICS HOLDINGS, INC.","symbol":"GDYN"},"owners":[{"id":113805,"kind":"person","name":"Klimoff Stan","position":1,"cik":"0001805664","reported_name":"Klimoff Stan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Common Stock","published_at":"2021-09-15T16:11:38.000Z","date":"2021-09-13","kind":"tax_withholding","acquired":false,"shares":4260,"price":28.67,"value":122134.2,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares that have been withheld by the Issuer to satisfy tax withholding and remittance obligations in connection with the net settlement of restricted stock units."}],"balance_after":184942,"source":{"system":"sec-edgar","filing":"0001209191-21-056160","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1805664/000120919121056160/doc4.xml","form_type":"4"}},{"id":2574870,"issuer":{"id":2031,"kind":"organization","name":"GRID DYNAMICS HOLDINGS, INC.","symbol":"GDYN"},"owners":[{"id":113805,"kind":"person","name":"Klimoff Stan","position":1,"cik":"0001805664","reported_name":"Klimoff Stan","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Strategy Officer"}}],"security":"Common Stock","published_at":"2021-09-09T17:20:57.000Z","date":"2021-09-07","kind":"sale","acquired":false,"shares":3000,"price":30.4305,"value":91291.5,"ownership":{"direct":false,"nature":"See footnote"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan entered into on March 11, 2021 by the O. Fox Charitable Trust for which the Reporting Person serves as trustee (the \"O. Fox Trust\")."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This transaction was executed in multiple trades at prices ranging from $30.04 to $30.94. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The shares are held of record by the O. 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