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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 purchased at each separate price within the range set forth in this footnote."}],"balance_after":175000,"source":{"system":"sec-edgar","filing":"0000905148-25-002876","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1874571/000090514825002876/form4.xml","form_type":"4"}},{"id":1200377,"issuer":{"id":6608,"kind":"organization","name":"MAXCYTE, INC."},"owners":[{"id":55067,"kind":"person","name":"Masoud Maher","position":1,"cik":"0001874571","reported_name":"Masoud Maher","relationship":{"director":true,"officer":true,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (right to buy)","published_at":"2025-03-18T20:31:18.000Z","date":"2025-03-14","kind":"grant","planned":false,"acquired":true,"shares":347500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Twenty-five percent (25%) of the shares underlying this option shall vest on March 14, 2026, and the remainder shall vest in thirty-six (36) equal monthly installments thereafter, subject to the Reporting Person's continued service to the Issuer through each vesting date."}],"balance_after":347500,"derivative":{"exercise_price":3.29,"expiration_date":"2035-03-13","underlying":"Common Stock","underlying_shares":347500},"source":{"system":"sec-edgar","filing":"0000905148-25-000961","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1874571/000090514825000961/form4.xml","form_type":"4"}},{"id":1485173,"issuer":{"id":6608,"kind":"organization","name":"MAXCYTE, INC."},"owners":[{"id":55067,"kind":"person","name":"Masoud Maher","position":1,"cik":"0001874571","reported_name":"Masoud Maher","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-06-10T17:55:54.000Z","date":"2024-06-10","kind":"purchase","planned":false,"acquired":true,"shares":70443,"price":4.901,"value":345241.143,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $4.77 to $5.00, inclusive. 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The shares were purchased in multiple transactions at prices ranging from $4.84 to $4.95, 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 purchased at each separate price within the range set forth in this footnote."}],"balance_after":29557,"source":{"system":"sec-edgar","filing":"0001415889-24-016259","document":"form4-06102024_090649.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1874571/000141588924016259/form4-06102024_090649.xml","form_type":"4"}},{"id":1688316,"issuer":{"id":6608,"kind":"organization","name":"MAXCYTE, INC."},"owners":[{"id":55067,"kind":"person","name":"Masoud Maher","position":1,"cik":"0001874571","reported_name":"Masoud Maher","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (right to buy)","published_at":"2024-01-04T16:30:10.000Z","date":"2024-01-03","kind":"grant","planned":false,"acquired":true,"shares":400000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"This option grant was made pursuant to the terms of the letter agreement, dated as of December 11, 2023, by and between the Issuer and the reporting person, entered into in connection with his appointment as President and Chief Executive Officer of the Issuer, as set forth in a Current Report on Form 8-K filed by the Issuer on December 11, 2023.  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25, 2023 and the remaining 75% vest in 36 equal monthly installments thereafter, subject to the reporting person's continuous service with the Issuer at each vesting date."}],"balance_after":242000,"derivative":{"exercise_price":7.12,"expiration_date":"2032-03-24","underlying":"Common Stock","underlying_shares":242000},"source":{"system":"sec-edgar","filing":"0001209191-22-021481","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1874571/000120919122021481/doc4.xml","form_type":"4"}},{"id":2511116,"issuer":{"id":6608,"kind":"organization","name":"MAXCYTE, INC."},"owners":[{"id":55067,"kind":"person","name":"Masoud Maher","position":1,"cik":"0001874571","reported_name":"Masoud Maher","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and General Counsel"}}],"security":"Employee Stock Option (right to 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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 within the range set forth in this footnote to this Form 4."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-21-064891","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1874571/000120919121064891/doc4.xml","form_type":"4"}},{"id":2511109,"issuer":{"id":6608,"kind":"organization","name":"MAXCYTE, INC."},"owners":[{"id":55067,"kind":"person","name":"Masoud Maher","position":1,"cik":"0001874571","reported_name":"Masoud Maher","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and General Counsel"}}],"security":"Common Stock","published_at":"2021-11-16T19:14:03.000Z","date":"2021-11-15","kind":"exercise","acquired":true,"shares":6438,"price":3.25,"value":20923.5,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This exercise price is in U.S. Dollars and reflects the conversion of GBP to USD at an exchange rate of GBP 1.00 to $1.34."}],"balance_after":30716,"source":{"system":"sec-edgar","filing":"0001209191-21-064891","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1874571/000120919121064891/doc4.xml","form_type":"4"}},{"id":2511108,"issuer":{"id":6608,"kind":"organization","name":"MAXCYTE, INC."},"owners":[{"id":55067,"kind":"person","name":"Masoud Maher","position":1,"cik":"0001874571","reported_name":"Masoud Maher","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and General Counsel"}}],"security":"Common Stock","published_at":"2021-11-16T19:14:03.000Z","date":"2021-11-15","kind":"exercise","acquired":true,"shares":24278,"price":2.08,"value":50498.24,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This exercise price is in U.S. Dollars and reflects the conversion of GBP to USD at an exchange rate of GBP 1.00 to $1.34."}],"balance_after":24278,"source":{"system":"sec-edgar","filing":"0001209191-21-064891","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1874571/000120919121064891/doc4.xml","form_type":"4"}},{"id":2511107,"issuer":{"id":6608,"kind":"organization","name":"MAXCYTE, INC."},"owners":[{"id":55067,"kind":"person","name":"Masoud Maher","position":1,"cik":"0001874571","reported_name":"Masoud Maher","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and General Counsel"}}],"security":"Common Stock","published_at":"2021-11-16T19:14:03.000Z","date":"2021-11-12","kind":"sale","acquired":false,"shares":25722,"price":12.66,"value":325640.52,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported is a weighted average price. The shares were sold in multiple transactions at prices ranging from $12.56 to $12.765, 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 within the range set forth in this footnote to this Form 4."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-21-064891","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1874571/000120919121064891/doc4.xml","form_type":"4"}},{"id":2511106,"issuer":{"id":6608,"kind":"organization","name":"MAXCYTE, INC."},"owners":[{"id":55067,"kind":"person","name":"Masoud Maher","position":1,"cik":"0001874571","reported_name":"Masoud Maher","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and General Counsel"}}],"security":"Common Stock","published_at":"2021-11-16T19:14:03.000Z","date":"2021-11-12","kind":"exercise","acquired":true,"shares":25722,"price":2.08,"value":53501.76,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"This exercise price is in U.S. Dollars and reflects the conversion of GBP to USD at an exchange rate of GBP 1.00 to $1.34."}],"balance_after":25722,"source":{"system":"sec-edgar","filing":"0001209191-21-064891","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1874571/000120919121064891/doc4.xml","form_type":"4"}},{"id":2607158,"issuer":{"id":6608,"kind":"organization","name":"MAXCYTE, INC."},"owners":[{"id":55067,"kind":"person","name":"Masoud Maher","position":1,"cik":"0001874571","reported_name":"Masoud Maher","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP and General Counsel"}}],"security":"Stock Option (right to buy)","published_at":"2021-08-11T17:17:58.000Z","date":"2021-08-09","kind":"grant","acquired":true,"shares":10000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"25% of the shares underlying the option vest on August 9, 2022 and the remaining shares underlying the option vest in 36 equal monthly installments thereafter, subject to the Reporting Person's continuous service with the Issuer at each vesting date."}],"balance_after":10000,"derivative":{"exercise_price":16.63,"expiration_date":"2031-08-09","underlying":"Common Stock","underlying_shares":10000},"source":{"system":"sec-edgar","filing":"0001209191-21-050945","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1874571/000120919121050945/doc4.xml","form_type":"4"}}]}