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The sale price ranged from $14.20 to $14.34 per share. Upon request from the SEC staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4."}],"balance_after":14799,"source":{"system":"sec-edgar","filing":"0002095702-26-000005","document":"form4-08112026_080848.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2095702/000209570226000005/form4-08112026_080848.xml","form_type":"4"}},{"id":738182,"issuer":{"id":5757,"kind":"organization","name":"Lyell Immunopharma, Inc.","symbol":"LYEL"},"owners":[{"id":24712,"kind":"person","name":"Bulis Veronica Sanchez","position":1,"cik":"0002095702","reported_name":"Bulis Veronica Sanchez","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, Corporate Controller"}}],"security":"Common Stock","published_at":"2026-06-15T22:32:20.000Z","date":"2026-05-11","kind":"sale","planned":false,"acquired":false,"shares":217,"price":18.91,"value":4103.47,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares automatically sold to cover tax withholding obligation from settlement of vested restricted stock units."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported above reflects the weighted average price of the shares sold. The sale price ranged from $18.91 to $19.30 per share. Upon request from the SEC staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4."}],"balance_after":15420,"source":{"system":"sec-edgar","filing":"0002095702-26-000004","document":"form4-06152026_100616.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2095702/000209570226000004/form4-06152026_100616.xml","form_type":"4"}},{"id":910271,"issuer":{"id":5757,"kind":"organization","name":"Lyell Immunopharma, Inc.","symbol":"LYEL"},"owners":[{"id":24712,"kind":"person","name":"Bulis Veronica Sanchez","position":1,"cik":"0002095702","reported_name":"Bulis Veronica Sanchez","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, Corporate Controller"}}],"security":"Common Stock","published_at":"2026-02-12T02:00:26.000Z","date":"2026-02-10","kind":"sale","planned":false,"acquired":false,"shares":254,"price":23.12,"value":5872.48,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Shares automatically sold to cover tax withholding obligation from settlement of vested restricted stock units."}],"balance_after":15637,"source":{"system":"sec-edgar","filing":"0002095702-26-000002","document":"form4-02122026_020223.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2095702/000209570226000002/form4-02122026_020223.xml","form_type":"4"}},{"id":910270,"issuer":{"id":5757,"kind":"organization","name":"Lyell Immunopharma, Inc.","symbol":"LYEL"},"owners":[{"id":24712,"kind":"person","name":"Bulis Veronica Sanchez","position":1,"cik":"0002095702","reported_name":"Bulis Veronica Sanchez","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, Corporate Controller"}}],"security":"Common Stock","published_at":"2026-02-12T02:00:26.000Z","date":"2026-02-10","kind":"grant","planned":false,"acquired":true,"shares":8750,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units granted under the Issuer's 2021 Equity Incentive Plan.  12.5% of the total number of restricted stock units will vest on August 9, 2026, and thereafter an additional 1/16th of the total number of restricted stock units will vest quarterly thereafter, subject to the reporting person providing service through the applicable vesting date."}],"balance_after":15891,"source":{"system":"sec-edgar","filing":"0002095702-26-000002","document":"form4-02122026_020223.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2095702/000209570226000002/form4-02122026_020223.xml","form_type":"4"}},{"id":947469,"issuer":{"id":5757,"kind":"organization","name":"Lyell Immunopharma, Inc.","symbol":"LYEL"},"owners":[{"id":24712,"kind":"person","name":"Bulis Veronica Sanchez","position":1,"cik":"0002095702","reported_name":"Bulis Veronica Sanchez","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, Corporate Controller"}}],"security":"Common Stock","published_at":"2026-01-06T21:02:57.000Z","date":"2025-12-30","kind":"sale","planned":false,"acquired":false,"shares":936,"price":32.32,"value":30251.52,"ownership":{"direct":true},"balance_after":7141,"source":{"system":"sec-edgar","filing":"0002095702-26-000001","document":"form4-01062026_090153.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2095702/000209570226000001/form4-01062026_090153.xml","form_type":"4"}},{"id":947468,"issuer":{"id":5757,"kind":"organization","name":"Lyell Immunopharma, Inc.","symbol":"LYEL"},"owners":[{"id":24712,"kind":"person","name":"Bulis Veronica Sanchez","position":1,"cik":"0002095702","reported_name":"Bulis Veronica Sanchez","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, Corporate Controller"}}],"security":"Common Stock","published_at":"2026-01-06T21:02:57.000Z","date":"2025-12-24","kind":"sale","planned":false,"acquired":false,"shares":1136,"price":38.67,"value":43929.12,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported above reflects the weighted average price of the shares sold. The sale price ranged from $38.6643 to $38.6751 per share. Upon request from the SEC staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4."}],"balance_after":8077,"source":{"system":"sec-edgar","filing":"0002095702-26-000001","document":"form4-01062026_090153.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2095702/000209570226000001/form4-01062026_090153.xml","form_type":"4"}},{"id":1002440,"issuer":{"id":5757,"kind":"organization","name":"Lyell Immunopharma, Inc.","symbol":"LYEL"},"owners":[{"id":24712,"kind":"person","name":"Bulis Veronica Sanchez","position":1,"cik":"0002095702","reported_name":"Bulis Veronica Sanchez","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, Corporate Controller"}}],"security":"Common Stock","published_at":"2025-11-13T01:34:59.000Z","date":"2025-11-10","kind":"sale","planned":false,"acquired":false,"shares":239,"price":16.1,"value":3847.9,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares automatically sold to cover tax withholding obligation from settlement of vested restricted stock units."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported above reflects the weighted average price of the shares sold. The sale price ranged from $16.08 to $16.11 per share. Upon request from the SEC staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4."}],"balance_after":9213,"source":{"system":"sec-edgar","filing":"0002095702-25-000003","document":"form4-11132025_011155.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2095702/000209570225000003/form4-11132025_011155.xml","form_type":"4"}}]}