{"transactions":[{"id":727792,"issuer":{"id":8214,"kind":"organization","name":"NuCana plc"},"owners":[{"id":35687,"kind":"person","name":"Levy Elliott M.","position":1,"cik":"0001858745","reported_name":"Levy Elliott M.","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Options","published_at":"2026-06-24T07:09:38.000Z","date":"2026-06-19","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":23811896,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The ordinary shares, nominal value 0.000004 Pounds Sterling per share, of NuCana plc (the \"Company\") underlying this option were exercisable as of June 20, 2026, had an exercise price of 0.0004 Pounds Sterling per share, and were set to expire on June 20, 2035."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The option was canceled by mutual agreement of the Reporting Person and the Company. The Reporting Person did not receive consideration for the cancellation."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The ordinary shares, nominal value 0.000004 Pounds Sterling per share, of NuCana plc (the \"Company\") underlying this option were exercisable as of June 20, 2026, had an exercise price of 0.0004 Pounds Sterling per share, and were set to expire on June 20, 2035."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The ordinary shares, nominal value 0.000004 Pounds Sterling per share, of NuCana plc (the \"Company\") underlying this option were exercisable as of June 20, 2026, had an exercise price of 0.0004 Pounds Sterling per share, and were set to expire on June 20, 2035."}],"balance_after":0,"derivative":{"underlying":"Ordinary Shares","underlying_shares":23811896},"source":{"system":"sec-edgar","filing":"0001193125-26-280239","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1858745/000119312526280239/ownership.xml","form_type":"4"}},{"id":728568,"issuer":{"id":8214,"kind":"organization","name":"NuCana plc"},"owners":[{"id":35890,"kind":"person","name":"Bloss Jeffrey D.","position":1,"cik":"0001807569","reported_name":"Bloss Jeffrey D.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Medical Officer"}}],"security":"Options","published_at":"2026-06-23T22:54:26.000Z","date":"2026-06-19","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":36539720,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"D - Partial cancelation of vested options."},{"field":"kind","element":"transactionCoding","label":"F1","text":"D - Partial cancelation of vested options."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The option was canceled by mutual agreement of the Reporting Person and the Company. The Reporting Person did not receive consideration for the cancellation."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The ordinary shares, nominal value 0.000004 Pounds Sterling per share (the \"Ordinary Shares\"), of NuCana plc (the \"Company\") underlying these options being canceled were part of a grant of 146,158,880 options that vested as to 25% on June 20, 2026, and had an exercise price of 0.0004 Pounds Sterling per share, with the remaining 109,619,160 to vest in three equal annual installments thereafter, subject to the Reporting Persons's continued service with the Company through the applicable vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The remaining options will expire on June 20, 2035."}],"balance_after":109619160,"derivative":{"underlying":"Ordinary Shares","underlying_shares":36539720},"source":{"system":"sec-edgar","filing":"0001193125-26-279925","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1709626/000119312526279925/ownership.xml","form_type":"4"}},{"id":806825,"issuer":{"id":8214,"kind":"organization","name":"NuCana plc"},"owners":[{"id":52224,"kind":"person","name":"Bruce Theresa Margaret Ms","position":1,"cik":"0002117971","reported_name":"Bruce Theresa Margaret Ms","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Options","published_at":"2026-04-16T20:42:34.000Z","date":"2026-04-15","kind":"grant","planned":false,"acquired":true,"shares":132600130,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The ordinary shares, nominal value 0.0004 Pounds Sterling per share (the \"Ordinary Shares\"), of NuCana plc (the \"Company\") underlying this option have an exercise price of 0.0004 Pounds Sterling."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The shares underlying this option vested as to 50% on April 15, 2026, with the remainder to vest in four equal annual installments thereafter, subject to the Reporting Person's continued service with the Company through the applicable vesting date."}],"balance_after":132600130,"derivative":{"expiration_date":"2036-04-15","underlying":"Ordinary Shares","underlying_shares":132600130},"source":{"system":"sec-edgar","filing":"0001193125-26-159162","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1709626/000119312526159162/ownership.xml","form_type":"4"}}]}