{"transactions":[{"id":809786,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF FINANCIAL OFFICER"}}],"security":"Stock Option (Right to Buy)","published_at":"2026-04-13T20:47:37.000Z","date":"2026-04-09","kind":"grant","planned":false,"acquired":true,"shares":300000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares subject to the option shall be scheduled to vest monthly over a term of 48 months on the monthly anniversaries of the grant date, subject to the optionee continuing to be a Service Provider (as defined in the Issuer's 2026 Equity Incentive Plan) through the applicable vesting dates."}],"balance_after":300000,"derivative":{"exercise_price":9.54,"expiration_date":"2036-04-08","underlying":"Common Stock","underlying_shares":300000},"source":{"system":"sec-edgar","filing":"0002037968-26-000006","document":"form4-04132026_080430.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000203796826000006/form4-04132026_080430.xml","form_type":"4"}},{"id":859029,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF FINANCIAL OFFICER"}}],"security":"Restricted Stock Units","published_at":"2026-03-06T00:10:24.000Z","date":"2026-03-03","kind":"exercise","planned":false,"acquired":false,"shares":3900,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each RSU represents a contingent right to receive one (1) share of Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On March 3, 2025, the reporting person was granted 3,900 RSUs (as adjusted for the 10-for-1 reverse stock split completed on September 17, 2025). 100% of the RSUs vested on the one (1) year anniversary of the grant date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On March 3, 2025, the reporting person was granted 3,900 RSUs (as adjusted for the 10-for-1 reverse stock split completed on September 17, 2025). 100% of the RSUs vested on the one (1) year anniversary of the grant date."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":3900},"source":{"system":"sec-edgar","filing":"0002037968-26-000004","document":"form4-03062026_120318.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000203796826000004/form4-03062026_120318.xml","form_type":"4"}},{"id":859028,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF FINANCIAL OFFICER"}}],"security":"Common Stock","published_at":"2026-03-06T00:10:24.000Z","date":"2026-03-04","kind":"sale","planned":false,"acquired":false,"shares":906,"price":5.37,"value":4865.22,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Represents shares of common stock sold to cover tax withholding and remittance obligations in connection with the vesting of restricted stock units (\"RSU\") pursuant to mandatory \"sell to cover\" policies maintained by the Issuer and provisions contained in the reporting person's applicable RSU agreement, and does not represent a discretionary sale by the reporting person. No additional shares of common stock were sold by the reporting person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The \"Amount\" and \"Price\" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $5.03 to $5.70, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein."}],"balance_after":15851,"source":{"system":"sec-edgar","filing":"0002037968-26-000004","document":"form4-03062026_120318.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000203796826000004/form4-03062026_120318.xml","form_type":"4"}},{"id":859027,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CHIEF FINANCIAL OFFICER"}}],"security":"Common Stock","published_at":"2026-03-06T00:10:24.000Z","date":"2026-03-03","kind":"exercise","planned":false,"acquired":true,"shares":3900,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":16757,"source":{"system":"sec-edgar","filing":"0002037968-26-000004","document":"form4-03062026_120318.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000203796826000004/form4-03062026_120318.xml","form_type":"4"}},{"id":952310,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Restricted Stock Units","published_at":"2026-01-06T00:50:54.000Z","date":"2025-12-31","kind":"exercise","planned":false,"acquired":false,"shares":1236,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F7","text":"RSUs convert into common stock on a one-for-one basis."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F8","text":"Each RSU represents a contingent right to receive one (1) share of Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"On October 1, 2024, the reporting person was granted 3,707 RSUs. One-third (1/3rd) of the RSUs vest on each of December 31, 2024, June 30, 2025 and December 31, 2025, subject to the reporting person continuing to be a Service Provider (as defined in the Issuer's 2020 Equity Incentive Plan (the \"Plan\")) through the applicable vesting dates."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F9","text":"On October 1, 2024, the reporting person was granted 3,707 RSUs. One-third (1/3rd) of the RSUs vest on each of December 31, 2024, June 30, 2025 and December 31, 2025, subject to the reporting person continuing to be a Service Provider (as defined in the Issuer's 2020 Equity Incentive Plan (the \"Plan\")) through the applicable vesting dates."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":1236},"source":{"system":"sec-edgar","filing":"0002037968-26-000002","document":"form4-01062026_120150.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000203796826000002/form4-01062026_120150.xml","form_type":"4"}},{"id":952309,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-01-06T00:50:54.000Z","date":"2026-01-02","kind":"sale","planned":false,"acquired":false,"shares":297,"price":6.88,"value":2043.36,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F5","text":"Represents shares of common stock sold to cover tax withholding and remittance obligations in connection with the vesting of restricted stock units (\"RSU\") pursuant to mandatory \"sell to cover\" policies maintained by the issuer and provisions contained in the reporting person's applicable RSU agreement, and does not represent a discretionary sale by the reporting person. No additional shares of common stock were sold by the reporting person and the shares of common stock received upon settlement of the RSUs are subject to a lock-up agreement with Cantor Fitzgerald & Co. entered into in connection with the Issuer's private placement in December 2025."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The \"Amount\" and \"Price\" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $6.60 to $7.56, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein."}],"balance_after":12857,"source":{"system":"sec-edgar","filing":"0002037968-26-000002","document":"form4-01062026_120150.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000203796826000002/form4-01062026_120150.xml","form_type":"4"}},{"id":952308,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-01-06T00:50:54.000Z","date":"2025-12-31","kind":"exercise","planned":false,"acquired":true,"shares":1236,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":13154,"source":{"system":"sec-edgar","filing":"0002037968-26-000002","document":"form4-01062026_120150.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000203796826000002/form4-01062026_120150.xml","form_type":"4"}},{"id":952307,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2026-01-06T00:50:54.000Z","date":"2025-11-18","kind":"grant","planned":false,"acquired":true,"shares":1000,"price":2.31,"value":2310.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"The reporting person is voluntarily reporting the acquisition of shares of the issuer's common stock pursuant to the Athira Pharma, Inc. 2020 Employee Stock Purchase Plan (\"ESPP\"), for the ESPP Purchase Period (as defined in the ESPP) of May 19, 2025 through November 18, 2025. This transaction is also exempt under Rule 16b-3(c)."},{"field":"security","element":"securityTitle","label":"F2","text":"The reported number of shares in this Form 4 has been adjusted to reflect the impact of the Issuer's 10-for-1 reverse stock split completed on September 17, 2025 (the \"Reverse Stock Split\")."},{"field":"date","element":"transactionDate","label":"F3","text":"The Purchase Period ended November 18, 2025 and is the Purchase Period comprising the Offering Period (as defined in the ESPP) that began May 19, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"In accordance with the ESPP, these shares were purchased based on 85% of the closing price on November 18, 2025."}],"balance_after":11918,"source":{"system":"sec-edgar","filing":"0002037968-26-000002","document":"form4-01062026_120150.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000203796826000002/form4-01062026_120150.xml","form_type":"4"}},{"id":958468,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-12-29T21:19:08.000Z","date":"2025-12-24","kind":"grant","planned":false,"acquired":true,"shares":34358,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The exercise price is equal to the closing price per share of Common Stock as reported on the Nasdaq Global Market on the date of grant."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"On September 24, 2025, the reporting person was granted an option to purchase 34,358 shares of common stock. The option was scheduled to vest only upon satisfaction of both a milestone requirement (the \"Milestone Requirement\") and a service-based requirement (the \"Service-Based Requirement\"). The Milestone Requirement was satisfied on December 23, 2025. The Service-Based Requirement will be satisfied as to 50% of the total number of shares granted under the option on December 23, 2026 and as to 1/36th of the remaining 50% on the 23rd day of each month thereafter, subject to the optionee continuing to be a Service Provider (as defined in the Issuer's 2020 Equity Incentive Plan) through the applicable vesting dates."}],"balance_after":34358,"derivative":{"exercise_price":4.07,"expiration_date":"2035-09-23","underlying":"Common Stock","underlying_shares":34358},"source":{"system":"sec-edgar","filing":"0002037968-25-000003","document":"form4-12292025_091202.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000203796825000003/form4-12292025_091202.xml","form_type":"4"}},{"id":1095795,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Finance and Accounting"}}],"security":"Restricted Stock Units","published_at":"2025-07-02T20:32:09.000Z","date":"2025-06-30","kind":"exercise","planned":false,"acquired":false,"shares":12359,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F6","text":"RSUs convert into common stock on a one-for-one basis."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"Each RSU represents a contingent right to receive one (1) share of Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"On October 1, 2024, the reporting person was granted 37,077 RSUs. One-third (1/3rd) of the RSUs vest on each of December 31, 2024, June 30, 2025 and December 31, 2025, subject to the reporting person continuing to be a Service Provider (as defined in the Issuer's 2020 Equity Incentive Plan (the \"Plan\")) through the applicable vesting dates."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"On October 1, 2024, the reporting person was granted 37,077 RSUs. One-third (1/3rd) of the RSUs vest on each of December 31, 2024, June 30, 2025 and December 31, 2025, subject to the reporting person continuing to be a Service Provider (as defined in the Issuer's 2020 Equity Incentive Plan (the \"Plan\")) through the applicable vesting dates."}],"balance_after":12359,"derivative":{"underlying":"Common Stock","underlying_shares":12359},"source":{"system":"sec-edgar","filing":"0001415889-25-019064","document":"form4-07022025_080705.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000141588925019064/form4-07022025_080705.xml","form_type":"4"}},{"id":1095794,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Finance and Accounting"}}],"security":"Common Stock","published_at":"2025-07-02T20:32:09.000Z","date":"2025-07-01","kind":"sale","planned":false,"acquired":false,"shares":2897,"price":0.2935,"value":850.2695,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"Represents shares of common stock sold to cover tax withholding and remittance obligations in connection with the vesting of restricted stock units (\"RSU\") pursuant to mandatory \"sell to cover\" policies maintained by the issuer and provisions contained in the reporting person's applicable RSU agreement, and does not represent a discretionary sale by the reporting person."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The \"Amount\" and \"Price\" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $0.2854 to $0.3031, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein."}],"balance_after":109186,"source":{"system":"sec-edgar","filing":"0001415889-25-019064","document":"form4-07022025_080705.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000141588925019064/form4-07022025_080705.xml","form_type":"4"}},{"id":1095793,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Finance and Accounting"}}],"security":"Common Stock","published_at":"2025-07-02T20:32:09.000Z","date":"2025-06-30","kind":"exercise","planned":false,"acquired":true,"shares":12359,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":112083,"source":{"system":"sec-edgar","filing":"0001415889-25-019064","document":"form4-07022025_080705.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000141588925019064/form4-07022025_080705.xml","form_type":"4"}},{"id":1095792,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Finance and Accounting"}}],"security":"Common Stock","published_at":"2025-07-02T20:32:09.000Z","date":"2025-05-19","kind":"grant","planned":false,"acquired":true,"shares":10000,"price":0.2312,"value":2312.0,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"The reporting person is voluntarily reporting the acquisition of shares of the issuer's common stock pursuant to the Athira Pharma, Inc. 2020 Employee Stock Purchase Plan (\"ESPP\"),for the ESPP Purchase Period (as defined in the ESPP) of November 18, 2024 through May 19, 2025. This transaction is exempt under Rule 16b-3(c)."},{"field":"date","element":"transactionDate","label":"F2","text":"The Purchase Period ended March 19, 2025 and is the Purchase Period comprising the Offering Period (as defined in the ESPP) that began November 18, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"In accordance with the ESPP, these shares were purchased based on 85% of the closing price on May 19, 2025."}],"balance_after":99724,"source":{"system":"sec-edgar","filing":"0001415889-25-019064","document":"form4-07022025_080705.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000141588925019064/form4-07022025_080705.xml","form_type":"4"}},{"id":1210216,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger 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Units","published_at":"2025-03-04T21:31:26.000Z","date":"2025-03-03","kind":"grant","planned":false,"acquired":true,"shares":39000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one (1) share of Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"100% of the RSUs shall vest on the one (1) year anniversary of the grant date, subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2020 Equity Incentive Plan (the \"Plan\")) through the vesting date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"100% of the RSUs shall vest on the one (1) year anniversary of the grant date, subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2020 Equity Incentive Plan (the \"Plan\")) through the vesting date."}],"balance_after":39000,"derivative":{"underlying":"Common Stock","underlying_shares":39000},"source":{"system":"sec-edgar","filing":"0001415889-25-006553","document":"form4-03042025_090322.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000141588925006553/form4-03042025_090322.xml","form_type":"4"}},{"id":1230162,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Finance and Accounting"}}],"security":"Stock Option (Right to 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Stock","underlying_shares":73350},"source":{"system":"sec-edgar","filing":"0001415889-25-006553","document":"form4-03042025_090322.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000141588925006553/form4-03042025_090322.xml","form_type":"4"}},{"id":1230161,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Finance and Accounting"}}],"security":"Stock Option (Right to Buy)","published_at":"2025-03-04T21:31:26.000Z","date":"2025-03-03","kind":"grant","planned":false,"acquired":true,"shares":58500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The shares subject to the option shall be scheduled to vest monthly over a term of 48 months on the monthly anniversaries of the grant date, subject to the optionee continuing to be a Service Provider (as defined in the Issuer's 2020 Equity Incentive Plan) through the applicable vesting dates."}],"balance_after":58500,"derivative":{"exercise_price":0.3762,"expiration_date":"2035-03-02","underlying":"Common 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common stock on a one-for-one basis."},{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"Each RSU represents a contingent right to receive one (1) share of Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"On October 1, 2024, the reporting person was granted 37,077 RSUs. One-third (1/3rd) of the RSUs vest on each of December 31, 2024, June 30, 2025 and December 31, 2025, subject to the reporting person continuing to be a Service Provider (as defined in the Issuer's 2020 Equity Incentive Plan (the \"Plan\")) through the applicable vesting dates."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"On October 1, 2024, the reporting person was granted 37,077 RSUs. One-third (1/3rd) of the RSUs vest on each of December 31, 2024, June 30, 2025 and December 31, 2025, subject to the reporting person continuing to be a Service Provider (as defined in the Issuer's 2020 Equity Incentive Plan (the \"Plan\")) through the applicable vesting dates."}],"balance_after":24718,"derivative":{"underlying":"Common Stock","underlying_shares":12359},"source":{"system":"sec-edgar","filing":"0001415889-25-000527","document":"form4-01032025_100141.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000141588925000527/form4-01032025_100141.xml","form_type":"4"}},{"id":1315670,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP of Finance"}}],"security":"Common Stock","published_at":"2025-01-03T22:01:44.000Z","date":"2025-01-02","kind":"sale","planned":false,"acquired":false,"shares":2881,"price":0.5619,"value":1618.8339,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"Represents shares of common stock sold to cover tax withholding and remittance obligations in connection with the vesting of restricted stock units (\"RSU\") pursuant to mandatory \"sell to cover\" policies maintained by the issuer and provisions contained in the reporting person's applicable RSU agreement, and does not represent a discretionary sale by the reporting person."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The \"Amount\" and \"Price\" reported in this Column 4 reflect the aggregate number and weighted-average price, respectively, of shares sold. These shares were sold in multiple transactions at prices ranging from $0.5414 to $0.5939, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the SEC staff, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein."}],"balance_after":89724,"source":{"system":"sec-edgar","filing":"0001415889-25-000527","document":"form4-01032025_100141.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000141588925000527/form4-01032025_100141.xml","form_type":"4"}},{"id":1315669,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP of Finance"}}],"security":"Common Stock","published_at":"2025-01-03T22:01:44.000Z","date":"2024-12-31","kind":"exercise","planned":false,"acquired":true,"shares":12359,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":92605,"source":{"system":"sec-edgar","filing":"0001415889-25-000527","document":"form4-01032025_100141.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000141588925000527/form4-01032025_100141.xml","form_type":"4"}},{"id":1315668,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP of Finance"}}],"security":"Common Stock","published_at":"2025-01-03T22:01:44.000Z","date":"2024-11-18","kind":"grant","planned":false,"acquired":true,"shares":3651,"price":0.55,"value":2008.05,"ownership":{"direct":true},"footnotes":[{"field":"security","element":"securityTitle","label":"F1","text":"The reporting person is voluntarily reporting the acquisition of shares of the issuer's common stock pursuant to the Athira Pharma, Inc. 2020 Employee Stock Purchase Plan (\"ESPP\"), for the ESPP Purchase Period (as defined in the ESPP) of May 20, 2024 through November 18, 2024. This transaction is also exempt under Rule 16b-3(c)."},{"field":"date","element":"transactionDate","label":"F2","text":"The Purchase Period ended November 18, 2024 and is the Purchase Period comprising the Offering Period (as defined in the ESPP) that began May 20, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"In accordance with the ESPP, these shares were purchased based on 85% of the closing price on November 18, 2024."}],"balance_after":80246,"source":{"system":"sec-edgar","filing":"0001415889-25-000527","document":"form4-01032025_100141.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000141588925000527/form4-01032025_100141.xml","form_type":"4"}},{"id":1392425,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP of Finance"}}],"security":"Stock Option (Right to Buy)","published_at":"2024-10-03T23:17:34.000Z","date":"2024-10-01","kind":"grant","planned":false,"acquired":true,"shares":37077,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"One-third (1/3rd) of the shares subject to the option shall vest on each of December 31, 2024, June 30, 2025 and December 31, 2025, subject to the Reporting Person continuing to be a Service Provider through the applicable vesting dates."}],"balance_after":37077,"derivative":{"exercise_price":0.4499,"expiration_date":"2034-09-30","underlying":"Common Stock","underlying_shares":37077},"source":{"system":"sec-edgar","filing":"0001415889-24-024686","document":"form4-10032024_111030.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000141588924024686/form4-10032024_111030.xml","form_type":"4"}},{"id":1392424,"issuer":{"id":1487,"kind":"organization","name":"LeonaBio, Inc.","symbol":"LONA"},"owners":[{"id":52747,"kind":"person","name":"Renninger Robert","position":1,"cik":"0002037968","reported_name":"Renninger Robert","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP of Finance"}}],"security":"Restricted Stock Units","published_at":"2024-10-03T23:17:34.000Z","date":"2024-10-01","kind":"grant","planned":false,"acquired":true,"shares":37077,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit (\"RSU\") represents a contingent right to receive one (1) share of Issuer's common stock."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"One-third (1/3rd) of the RSUs shall vest on each of December 31, 2024, June 30, 2025 and December 31, 2025, subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2020 Equity Incentive Plan (the \"Plan\")) through the applicable vesting dates."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"One-third (1/3rd) of the RSUs shall vest on each of December 31, 2024, June 30, 2025 and December 31, 2025, subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2020 Equity Incentive Plan (the \"Plan\")) through the applicable vesting dates."}],"balance_after":37077,"derivative":{"underlying":"Common Stock","underlying_shares":37077},"source":{"system":"sec-edgar","filing":"0001415889-24-024686","document":"form4-10032024_111030.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/2037968/000141588924024686/form4-10032024_111030.xml","form_type":"4"}}]}