{"transactions":[{"id":4638139,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-10-08T22:17:46.000Z","date":"2026-10-06","kind":"sale","planned":false,"acquired":false,"shares":118,"price":24.1915,"value":2854.597,"ownership":{"direct":true},"balance_after":105834,"source":{"system":"sec-edgar","filing":"0001859690-26-000189","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000189/form4.xml","form_type":"4"}},{"id":4637491,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Share Units","published_at":"2026-10-07T23:44:01.000Z","date":"2026-10-05","kind":"exercise","planned":false,"acquired":false,"shares":83,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028."}],"balance_after":2000,"derivative":{"underlying":"Ordinary Shares","underlying_shares":83},"source":{"system":"sec-edgar","filing":"0001859690-26-000180","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000180/form4.xml","form_type":"4"}},{"id":4637490,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Share Units","published_at":"2026-10-07T23:44:01.000Z","date":"2026-10-05","kind":"exercise","planned":false,"acquired":false,"shares":83,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027."}],"balance_after":1001,"derivative":{"underlying":"Ordinary Shares","underlying_shares":83},"source":{"system":"sec-edgar","filing":"0001859690-26-000180","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000180/form4.xml","form_type":"4"}},{"id":4637489,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Share Units","published_at":"2026-10-07T23:44:01.000Z","date":"2026-10-05","kind":"exercise","planned":false,"acquired":false,"shares":66,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027."}],"balance_after":750,"derivative":{"underlying":"Ordinary Shares","underlying_shares":66},"source":{"system":"sec-edgar","filing":"0001859690-26-000180","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000180/form4.xml","form_type":"4"}},{"id":4637488,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Share Units","published_at":"2026-10-07T23:44:01.000Z","date":"2026-10-05","kind":"exercise","planned":false,"acquired":false,"shares":16,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027."}],"balance_after":816,"derivative":{"underlying":"Ordinary Shares","underlying_shares":16},"source":{"system":"sec-edgar","filing":"0001859690-26-000180","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000180/form4.xml","form_type":"4"}},{"id":4637487,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-10-07T23:44:01.000Z","date":"2026-10-05","kind":"sale","planned":false,"acquired":false,"shares":127,"price":23.7847,"value":3020.6569,"ownership":{"direct":true},"balance_after":105952,"source":{"system":"sec-edgar","filing":"0001859690-26-000180","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000180/form4.xml","form_type":"4"}},{"id":4637486,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-10-07T23:44:01.000Z","date":"2026-10-05","kind":"exercise","planned":false,"acquired":true,"shares":83,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":106079,"source":{"system":"sec-edgar","filing":"0001859690-26-000180","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000180/form4.xml","form_type":"4"}},{"id":4637485,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-10-07T23:44:01.000Z","date":"2026-10-05","kind":"exercise","planned":false,"acquired":true,"shares":83,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":105996,"source":{"system":"sec-edgar","filing":"0001859690-26-000180","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000180/form4.xml","form_type":"4"}},{"id":4637484,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-10-07T23:44:01.000Z","date":"2026-10-05","kind":"exercise","planned":false,"acquired":true,"shares":66,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":105913,"source":{"system":"sec-edgar","filing":"0001859690-26-000180","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000180/form4.xml","form_type":"4"}},{"id":4637483,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-10-07T23:44:01.000Z","date":"2026-10-05","kind":"exercise","planned":false,"acquired":true,"shares":16,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":105847,"source":{"system":"sec-edgar","filing":"0001859690-26-000180","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000180/form4.xml","form_type":"4"}},{"id":4636573,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Share Units","published_at":"2026-10-06T23:44:34.000Z","date":"2026-10-02","kind":"exercise","planned":false,"acquired":false,"shares":83,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028."}],"balance_after":2083,"derivative":{"underlying":"Ordinary Shares","underlying_shares":83},"source":{"system":"sec-edgar","filing":"0001859690-26-000175","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000175/form4.xml","form_type":"4"}},{"id":4636572,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Share Units","published_at":"2026-10-06T23:44:34.000Z","date":"2026-10-02","kind":"exercise","planned":false,"acquired":false,"shares":83,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027."}],"balance_after":1084,"derivative":{"underlying":"Ordinary Shares","underlying_shares":83},"source":{"system":"sec-edgar","filing":"0001859690-26-000175","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000175/form4.xml","form_type":"4"}},{"id":4636571,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Share Units","published_at":"2026-10-06T23:44:34.000Z","date":"2026-10-02","kind":"exercise","planned":false,"acquired":false,"shares":67,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027."}],"balance_after":832,"derivative":{"underlying":"Ordinary Shares","underlying_shares":67},"source":{"system":"sec-edgar","filing":"0001859690-26-000175","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000175/form4.xml","form_type":"4"}},{"id":4636570,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Share Units","published_at":"2026-10-06T23:44:34.000Z","date":"2026-10-02","kind":"exercise","planned":false,"acquired":false,"shares":17,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027."}],"balance_after":899,"derivative":{"underlying":"Ordinary Shares","underlying_shares":17},"source":{"system":"sec-edgar","filing":"0001859690-26-000175","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000175/form4.xml","form_type":"4"}},{"id":4636569,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-10-06T23:44:34.000Z","date":"2026-10-02","kind":"sale","planned":false,"acquired":false,"shares":40,"price":24.4743,"value":978.972,"ownership":{"direct":true},"balance_after":105831,"source":{"system":"sec-edgar","filing":"0001859690-26-000175","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000175/form4.xml","form_type":"4"}},{"id":4636568,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-10-06T23:44:34.000Z","date":"2026-10-02","kind":"sale","planned":false,"acquired":false,"shares":40,"price":24.4743,"value":978.972,"ownership":{"direct":true},"balance_after":105871,"source":{"system":"sec-edgar","filing":"0001859690-26-000175","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000175/form4.xml","form_type":"4"}},{"id":4636567,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-10-06T23:44:34.000Z","date":"2026-10-02","kind":"sale","planned":false,"acquired":false,"shares":9,"price":24.4743,"value":220.2687,"ownership":{"direct":true},"balance_after":105911,"source":{"system":"sec-edgar","filing":"0001859690-26-000175","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000175/form4.xml","form_type":"4"}},{"id":4636566,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-10-06T23:44:34.000Z","date":"2026-10-02","kind":"sale","planned":false,"acquired":false,"shares":32,"price":24.4743,"value":783.1776,"ownership":{"direct":true},"balance_after":105920,"source":{"system":"sec-edgar","filing":"0001859690-26-000175","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000175/form4.xml","form_type":"4"}},{"id":4636565,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-10-06T23:44:34.000Z","date":"2026-10-02","kind":"exercise","planned":false,"acquired":true,"shares":83,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":105952,"source":{"system":"sec-edgar","filing":"0001859690-26-000175","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000175/form4.xml","form_type":"4"}},{"id":4636564,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-10-06T23:44:34.000Z","date":"2026-10-02","kind":"exercise","planned":false,"acquired":true,"shares":83,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":105869,"source":{"system":"sec-edgar","filing":"0001859690-26-000175","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000175/form4.xml","form_type":"4"}},{"id":4636563,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-10-06T23:44:34.000Z","date":"2026-10-02","kind":"exercise","planned":false,"acquired":true,"shares":67,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":105786,"source":{"system":"sec-edgar","filing":"0001859690-26-000175","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000175/form4.xml","form_type":"4"}},{"id":4636562,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-10-06T23:44:34.000Z","date":"2026-10-02","kind":"exercise","planned":false,"acquired":true,"shares":17,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":105719,"source":{"system":"sec-edgar","filing":"0001859690-26-000175","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000175/form4.xml","form_type":"4"}},{"id":4631470,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Share Units","published_at":"2026-10-06T00:24:57.000Z","date":"2026-10-01","kind":"exercise","planned":false,"acquired":false,"shares":84,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028."}],"balance_after":2166,"derivative":{"underlying":"Ordinary Shares","underlying_shares":84},"source":{"system":"sec-edgar","filing":"0001859690-26-000164","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000164/form4.xml","form_type":"4"}},{"id":4631469,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Share Units","published_at":"2026-10-06T00:24:57.000Z","date":"2026-10-01","kind":"exercise","planned":false,"acquired":false,"shares":84,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, July 1, and October 1, 2027."}],"balance_after":1167,"derivative":{"underlying":"Ordinary Shares","underlying_shares":84},"source":{"system":"sec-edgar","filing":"0001859690-26-000164","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000164/form4.xml","form_type":"4"}},{"id":4631468,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Share Units","published_at":"2026-10-06T00:24:57.000Z","date":"2026-10-01","kind":"exercise","planned":false,"acquired":false,"shares":67,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027."}],"balance_after":916,"derivative":{"underlying":"Ordinary Shares","underlying_shares":67},"source":{"system":"sec-edgar","filing":"0001859690-26-000164","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000164/form4.xml","form_type":"4"}},{"id":4631467,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Share Units","published_at":"2026-10-06T00:24:57.000Z","date":"2026-10-01","kind":"exercise","planned":false,"acquired":false,"shares":17,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs vest quarterly in equal installments on October 1, 2026, and January 1, April 1, and July 1, 2027."}],"balance_after":983,"derivative":{"underlying":"Ordinary Shares","underlying_shares":17},"source":{"system":"sec-edgar","filing":"0001859690-26-000164","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000164/form4.xml","form_type":"4"}},{"id":4631466,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-10-06T00:24:57.000Z","date":"2026-10-01","kind":"exercise","planned":false,"acquired":true,"shares":84,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":105702,"source":{"system":"sec-edgar","filing":"0001859690-26-000164","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000164/form4.xml","form_type":"4"}},{"id":4631465,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-10-06T00:24:57.000Z","date":"2026-10-01","kind":"exercise","planned":false,"acquired":true,"shares":84,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":105618,"source":{"system":"sec-edgar","filing":"0001859690-26-000164","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000164/form4.xml","form_type":"4"}},{"id":4631464,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-10-06T00:24:57.000Z","date":"2026-10-01","kind":"exercise","planned":false,"acquired":true,"shares":67,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":105534,"source":{"system":"sec-edgar","filing":"0001859690-26-000164","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000164/form4.xml","form_type":"4"}},{"id":4631463,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-10-06T00:24:57.000Z","date":"2026-10-01","kind":"exercise","planned":false,"acquired":true,"shares":17,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":105467,"source":{"system":"sec-edgar","filing":"0001859690-26-000164","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1859690/000185969026000164/form4.xml","form_type":"4"}},{"id":705060,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Share Units","published_at":"2026-07-21T18:09:01.000Z","date":"2026-07-17","kind":"exercise","planned":false,"acquired":false,"shares":841,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested within the week of the grant date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested within the week of the grant date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested within the week of the grant date."}],"balance_after":0,"derivative":{"underlying":"Ordinary Shares","underlying_shares":841},"source":{"system":"sec-edgar","filing":"0001859690-26-000153","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000153/form4.xml","form_type":"4"}},{"id":705059,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-07-21T18:09:01.000Z","date":"2026-07-17","kind":"exercise","planned":false,"acquired":true,"shares":841,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested within the week of the grant date."}],"balance_after":105450,"source":{"system":"sec-edgar","filing":"0001859690-26-000153","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000153/form4.xml","form_type":"4"}},{"id":706279,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Share Units","published_at":"2026-07-17T22:22:11.000Z","date":"2026-07-15","kind":"grant","planned":false,"acquired":true,"shares":841,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vest within the week of the grant date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vest within the week of the grant date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vest within the week of the grant date."}],"balance_after":841,"derivative":{"underlying":"Ordinary Shares","underlying_shares":841},"source":{"system":"sec-edgar","filing":"0001859690-26-000147","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000147/form4.xml","form_type":"4"}},{"id":714281,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Share Units","published_at":"2026-07-06T21:18:42.000Z","date":"2026-07-01","kind":"exercise","planned":false,"acquired":false,"shares":249,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The RSUs vest quarterly in equal installments on July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"The RSUs vest quarterly in equal installments on July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028."}],"balance_after":2250,"derivative":{"underlying":"Ordinary Shares","underlying_shares":249},"source":{"system":"sec-edgar","filing":"0001859690-26-000135","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000135/form4.xml","form_type":"4"}},{"id":714280,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Share Units","published_at":"2026-07-06T21:18:42.000Z","date":"2026-07-01","kind":"exercise","planned":false,"acquired":false,"shares":250,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The RSUs vest quarterly in equal installments on July 1 and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The RSUs vest quarterly in equal installments on July 1 and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027."}],"balance_after":1251,"derivative":{"underlying":"Ordinary Shares","underlying_shares":250},"source":{"system":"sec-edgar","filing":"0001859690-26-000135","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000135/form4.xml","form_type":"4"}},{"id":714279,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Share Units","published_at":"2026-07-06T21:18:42.000Z","date":"2026-07-01","kind":"exercise","planned":false,"acquired":false,"shares":250,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs vest quarterly in equal installments on July 1 and October 1, 2026, and January 1, April 1, and July 1, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs vest quarterly in equal installments on July 1 and October 1, 2026, and January 1, April 1, and July 1, 2027."}],"balance_after":1000,"derivative":{"underlying":"Ordinary Shares","underlying_shares":250},"source":{"system":"sec-edgar","filing":"0001859690-26-000135","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000135/form4.xml","form_type":"4"}},{"id":714278,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Share Units","published_at":"2026-07-06T21:18:42.000Z","date":"2026-07-01","kind":"exercise","planned":false,"acquired":false,"shares":50,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vested on July 1, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs vested on July 1, 2026."}],"balance_after":0,"derivative":{"underlying":"Ordinary Shares","underlying_shares":50},"source":{"system":"sec-edgar","filing":"0001859690-26-000135","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000135/form4.xml","form_type":"4"}},{"id":714277,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-07-06T21:18:42.000Z","date":"2026-07-02","kind":"sale","planned":false,"acquired":false,"shares":439,"price":25.2026,"value":11063.9414,"ownership":{"direct":true},"balance_after":104609,"source":{"system":"sec-edgar","filing":"0001859690-26-000135","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000135/form4.xml","form_type":"4"}},{"id":714276,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-07-06T21:18:42.000Z","date":"2026-07-01","kind":"exercise","planned":false,"acquired":true,"shares":249,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":105048,"source":{"system":"sec-edgar","filing":"0001859690-26-000135","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000135/form4.xml","form_type":"4"}},{"id":714275,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-07-06T21:18:42.000Z","date":"2026-07-01","kind":"exercise","planned":false,"acquired":true,"shares":250,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":104799,"source":{"system":"sec-edgar","filing":"0001859690-26-000135","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000135/form4.xml","form_type":"4"}},{"id":714274,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-07-06T21:18:42.000Z","date":"2026-07-01","kind":"exercise","planned":false,"acquired":true,"shares":250,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":104549,"source":{"system":"sec-edgar","filing":"0001859690-26-000135","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000135/form4.xml","form_type":"4"}},{"id":714273,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-07-06T21:18:42.000Z","date":"2026-07-01","kind":"exercise","planned":false,"acquired":true,"shares":50,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The Restricted Share Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":104299,"source":{"system":"sec-edgar","filing":"0001859690-26-000135","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000135/form4.xml","form_type":"4"}},{"id":747352,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Share Purchase Warrants (right to buy)","published_at":"2026-06-05T21:38:47.000Z","date":"2026-06-05","kind":"exercise","planned":false,"acquired":false,"shares":73562,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Ordinary Share Purchase Warrants exercised at $2.50 per share for ARQQ ordinary shares."}],"balance_after":0,"derivative":{"exercise_price":2.5,"expiration_date":"2026-09-30","underlying":"Ordinary Shares","underlying_shares":73562},"source":{"system":"sec-edgar","filing":"0001859690-26-000102","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000102/form4.xml","form_type":"4"}},{"id":747351,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-06-05T21:38:47.000Z","date":"2026-06-05","kind":"exercise","planned":false,"acquired":true,"shares":73562,"price":2.5,"value":183905.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Ordinary Share Purchase Warrants exercised at $2.50 per share for ARQQ ordinary shares."}],"balance_after":104249,"source":{"system":"sec-edgar","filing":"0001859690-26-000102","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000102/form4.xml","form_type":"4"}},{"id":786158,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Stock Units","published_at":"2026-05-08T21:37:01.000Z","date":"2026-05-07","kind":"exercise","planned":false,"acquired":false,"shares":1887,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one bases. The RSUs vest immediately on the date of grant."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one bases. The RSUs vest immediately on the date of grant."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one bases. The RSUs vest immediately on the date of grant."}],"balance_after":0,"derivative":{"underlying":"Ordinary Shares","underlying_shares":1887},"source":{"system":"sec-edgar","filing":"0001859690-26-000082","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000082/form4.xml","form_type":"4"}},{"id":786157,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Stock Units","published_at":"2026-05-08T21:37:01.000Z","date":"2026-05-07","kind":"grant","planned":false,"acquired":true,"shares":1887,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one bases. The RSUs vest immediately on the date of grant."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one bases. The RSUs vest immediately on the date of grant."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one bases. The RSUs vest immediately on the date of grant."}],"balance_after":1887,"derivative":{"underlying":"Ordinary Shares","underlying_shares":1887},"source":{"system":"sec-edgar","filing":"0001859690-26-000082","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000082/form4.xml","form_type":"4"}},{"id":786156,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-05-08T21:37:01.000Z","date":"2026-05-07","kind":"exercise","planned":false,"acquired":true,"shares":1887,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one bases. The RSUs vest immediately on the date of grant."}],"balance_after":30687,"source":{"system":"sec-edgar","filing":"0001859690-26-000082","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000082/form4.xml","form_type":"4"}},{"id":815227,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Stock Units","published_at":"2026-04-03T23:30:35.000Z","date":"2026-04-01","kind":"exercise","planned":false,"acquired":false,"shares":501,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"501 RSUs vested on April 1, 2026 and the remaining RSUs vest quarterly in equal installments on July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"501 RSUs vested on April 1, 2026 and the remaining RSUs vest quarterly in equal installments on July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027, and January 1, April 1, July 1, and October 1, 2028."}],"balance_after":2499,"derivative":{"underlying":"Ordinary Shares","underlying_shares":501},"source":{"system":"sec-edgar","filing":"0001859690-26-000061","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000061/form4.xml","form_type":"4"}},{"id":815226,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Stock Units","published_at":"2026-04-03T23:30:35.000Z","date":"2026-04-01","kind":"exercise","planned":false,"acquired":false,"shares":250,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, July 1, and October 1, 2027."}],"balance_after":1501,"derivative":{"underlying":"Ordinary Shares","underlying_shares":250},"source":{"system":"sec-edgar","filing":"0001859690-26-000061","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000061/form4.xml","form_type":"4"}},{"id":815225,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Stock Units","published_at":"2026-04-03T23:30:35.000Z","date":"2026-04-01","kind":"exercise","planned":false,"acquired":false,"shares":50,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs vest quarterly in equal installments on April 1, and July 1, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs vest quarterly in equal installments on April 1, and July 1, 2026."}],"balance_after":50,"derivative":{"underlying":"Ordinary Shares","underlying_shares":50},"source":{"system":"sec-edgar","filing":"0001859690-26-000061","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000061/form4.xml","form_type":"4"}},{"id":815224,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Restricted Stock Units","published_at":"2026-04-03T23:30:35.000Z","date":"2026-04-01","kind":"exercise","planned":false,"acquired":false,"shares":250,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, and July 1, 2027."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs vest quarterly in equal installments on April 1, July 1, and October 1, 2026, and January 1, April 1, and July 1, 2027."}],"balance_after":1250,"derivative":{"underlying":"Ordinary Shares","underlying_shares":250},"source":{"system":"sec-edgar","filing":"0001859690-26-000061","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000061/form4.xml","form_type":"4"}},{"id":815223,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-04-03T23:30:35.000Z","date":"2026-04-02","kind":"sale","planned":false,"acquired":false,"shares":512,"price":13.2463,"value":6782.1056,"ownership":{"direct":true},"balance_after":28800,"source":{"system":"sec-edgar","filing":"0001859690-26-000061","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000061/form4.xml","form_type":"4"}},{"id":815222,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-04-03T23:30:35.000Z","date":"2026-04-01","kind":"exercise","planned":false,"acquired":true,"shares":501,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":29312,"source":{"system":"sec-edgar","filing":"0001859690-26-000061","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000061/form4.xml","form_type":"4"}},{"id":815221,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-04-03T23:30:35.000Z","date":"2026-04-01","kind":"exercise","planned":false,"acquired":true,"shares":250,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":28811,"source":{"system":"sec-edgar","filing":"0001859690-26-000061","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000061/form4.xml","form_type":"4"}},{"id":815220,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-04-03T23:30:35.000Z","date":"2026-04-01","kind":"exercise","planned":false,"acquired":true,"shares":50,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":28561,"source":{"system":"sec-edgar","filing":"0001859690-26-000061","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000061/form4.xml","form_type":"4"}},{"id":815219,"issuer":{"id":5853,"kind":"organization","name":"Arqit Quantum Inc.","symbol":"ARQQ"},"owners":[{"id":29254,"kind":"person","name":"Ritchie Garth","position":1,"cik":"0001840684","reported_name":"Ritchie Garth","relationship":{"director":true}}],"security":"Ordinary Shares","published_at":"2026-04-03T23:30:35.000Z","date":"2026-04-01","kind":"exercise","planned":false,"acquired":true,"shares":250,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Restricted Stock Units (\"RSUs\") convert into ARQQ ordinary shares on a one-for-one basis."}],"balance_after":28511,"source":{"system":"sec-edgar","filing":"0001859690-26-000061","document":"form4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1840684/000185969026000061/form4.xml","form_type":"4"}}]}