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These shares were purchased in multiple transactions at prices ranging from $13.7700 to $13.8000, inclusive. Each Reporting Person undertakes to provide to Rallybio Corp, any security holder of Rallybio Corp or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"The reported securities are owned directly by private investment funds managed by ADAR1 Capital Management, LLC and separately managed accounts of ADAR1 Capital Management, LLC, and may be deemed to be indirectly beneficially owned by (i) ADAR1 Capital Management, LLC and (ii) Daniel Schneeberger, the sole manager of ADAR1 Capital Management, LLC."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise."}],"balance_after":834665,"source":{"system":"sec-edgar","filing":"0001104659-26-062883","document":"tm2614866-1_4seq1.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1940272/000110465926062883/tm2614866-1_4seq1.xml","form_type":"4"}},{"id":781000,"issuer":{"id":6838,"kind":"organization","name":"Rallybio Corp","symbol":"RLYB"},"owners":[{"id":980,"kind":"organization","name":"ADAR1 Capital Management, LLC","position":1,"cik":"0001940272","reported_name":"ADAR1 Capital Management, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":981,"kind":"person","name":"Schneeberger Daniel","position":2,"cik":"0001861120","reported_name":"Schneeberger Daniel","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2026-05-14T01:22:58.000Z","date":"2026-05-12","kind":"purchase","planned":false,"acquired":true,"shares":800,"price":13.8288,"value":11063.04,"ownership":{"direct":false,"nature":"See Footnote"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The reported price is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.7500 to $13.9300, inclusive. Each Reporting Person undertakes to provide to Rallybio Corp, any security holder of Rallybio Corp or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"The reported securities are owned directly by private investment funds managed by ADAR1 Capital Management, LLC and separately managed accounts of ADAR1 Capital Management, LLC, and may be deemed to be indirectly beneficially owned by (i) ADAR1 Capital Management, LLC and (ii) Daniel Schneeberger, the sole manager of ADAR1 Capital Management, LLC."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its pecuniary 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Each Pre-Funded Warrant represents the right to purchase one share of the Issuer's common stock (\"Common Stock\"), subject to the Blocker (defined in footnote 2), and can be exercised on a cash or cashless basis.  The Pre-Funded Warrants will not expire."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The Pre-Funded Warrants cannot be exercised to the extent that, upon giving effect to such exercise, the aggregated number of shares of Common Stock beneficially owned by the holder (together with its affiliates, any \"group\" or any other persons whose beneficial ownership could be aggregated with the holders) would exceed 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to such exercise, which percentage may be increased or decreased at the holder's election only upon 61 days' advance notice to the Issuer, provided that such percentage may in no event exceed 19.99% (the \"Blocker\").  As of the date of this Form 4, the Reporting Persons (as defined in footnote 3) cannot exercise their Pre-Funded Warrants due to the Blocker."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On November 15, 2022, Opportunities Fund acquired 3,333,388 pre-funded warrants, each with an exercise price of $0.0001, (\"Pre-Funded Warrants\") for an aggregate purchase price of $20 million.  Each Pre-Funded Warrant represents the right to purchase one share of the Issuer's common stock (\"Common Stock\"), subject to the Blocker (defined in footnote 2), and can be exercised on a cash or cashless basis.  The Pre-Funded Warrants will not expire."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The Pre-Funded Warrants cannot be exercised to the extent that, upon giving effect to such exercise, the aggregated number of shares of Common Stock beneficially owned by the holder (together with its affiliates, any \"group\" or any other persons whose beneficial ownership could be aggregated with the holders) would exceed 9.99% of the number of shares of Common Stock outstanding immediately after giving effect to such exercise, which percentage may be increased or decreased at the holder's election only upon 61 days' advance notice to the Issuer, provided that such percentage may in no event exceed 19.99% (the \"Blocker\").  As of the date of this Form 4, the Reporting Persons (as defined in footnote 3) cannot exercise their Pre-Funded Warrants due to the Blocker."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F3","text":"Andreas Halvorsen, David C. Ott and Rose S. Shabet are Executive Committee members of certain management entities, including Viking Global Partners LLC, the general partner of Viking Global Investors LP (\"VGI\"), and Viking Global Opportunities Parent GP LLC (\"Opportunities Parent\"), the sole member of Viking Global Opportunities GP LLC (\"Opportunities GP\"), which is the sole member of Viking Global Opportunities Portfolio GP LLC (\"Opportunities Portfolio GP\"), which is the general partner of Viking Global Opportunities Illiquid Investments Sub-Master LP (\"Opportunities Fund\"). VGI provides managerial services to various investment funds, including Opportunities Fund. Each of VGI, Opportunities Parent, Opportunities GP, Opportunities Portfolio GP, Opportunities Fund, Mr. Halvorsen, Mr. Ott and Ms. Shabet (collectively the \"Reporting Persons\") may be deemed to beneficially own the shares reported on this form."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F4","text":"These Pre-Funded Warrants are held directly by Opportunities Fund. Because of the relationship between VGI, Opportunities Parent, Opportunities GP, Opportunities Portfolio GP, Mr. Halvorsen, Mr. Ott, Ms. Shabet and Opportunities Fund, each of VGI, Opportunities Parent, Opportunities GP, Opportunities Portfolio GP, Mr. Halvorsen, Mr. Ott and Ms. Shabet may be deemed to beneficially own the shares held directly by Opportunities Fund."},{"field":"ownership.nature","element":"natureOfOwnership","label":"F5","text":"The Reporting Persons disclaim beneficial ownership of these securities except to the extent of their pecuniary interest therein, and the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of the reported securities for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the \"Exchange Act\"), or for any other purpose."}],"balance_after":3333388,"derivative":{"exercise_price":0.0001,"underlying":"Common Stock","underlying_shares":3333388},"source":{"system":"sec-edgar","filing":"0001140361-22-042081","document":"form4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1103804/000114036122042081/form4.xml","form_type":"4"}},{"id":2196480,"issuer":{"id":6838,"kind":"organization","name":"Rallybio Corp","symbol":"RLYB"},"owners":[{"id":40663,"kind":"person","name":"Chung Wendy","position":1,"cik":"0001922605","reported_name":"Chung Wendy","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Option (Right to Buy)","published_at":"2022-08-03T21:48:08.000Z","date":"2022-08-01","kind":"grant","acquired":true,"shares":26880,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option is granted under the Company's 2021 Equity Incentive Plan. The option vests in three equal annual installments beginning on August 1, 2023."}],"balance_after":26880,"derivative":{"exercise_price":9.11,"expiration_date":"2032-08-01","underlying":"Common Stock","underlying_shares":26880},"source":{"system":"sec-edgar","filing":"0000899243-22-027631","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1922605/000089924322027631/doc4.xml","form_type":"4"}},{"id":2240289,"issuer":{"id":6838,"kind":"organization","name":"Rallybio Corp","symbol":"RLYB"},"owners":[{"id":21276,"kind":"person","name":"PARMAR KUSH","position":1,"cik":"0001664281","reported_name":"PARMAR KUSH","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2022-06-07T21:03:56.000Z","date":"2022-06-03","kind":"sale","acquired":false,"shares":50329,"price":12.5,"value":629112.5,"ownership":{"direct":false,"nature":"By 5AM Opportunities I, L.P."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"These securities are held directly by 5AM Opportunities I, L.P. (\"Opportunities I, L.P.\"). 5AM Opportunities I (GP), LLC (\"Opportunities I (GP)\") is the general partner of Opportunities I, L.P. Dr. Parmar is a managing member of Opportunities I (GP), and may be deemed to share voting and dispositive power over the securities held by Opportunities I, L.P. Dr. Parmar disclaims beneficial ownership of the securities held by Opportunities I, L.P. except to the extent of his pecuniary interest therein."}],"balance_after":1251755,"source":{"system":"sec-edgar","filing":"0001209191-22-034860","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1739410/000120919122034860/doc4.xml","form_type":"4"}},{"id":2240288,"issuer":{"id":6838,"kind":"organization","name":"Rallybio Corp","symbol":"RLYB"},"owners":[{"id":21276,"kind":"person","name":"PARMAR KUSH","position":1,"cik":"0001664281","reported_name":"PARMAR KUSH","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2022-06-07T21:03:56.000Z","date":"2022-06-03","kind":"sale","acquired":false,"shares":99671,"price":12.5,"value":1245887.5,"ownership":{"direct":false,"nature":"By 5AM Ventures V, L.P."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"These securities are held directly by 5AM Ventures V, L.P. (\"Ventures V\"). 5AM Partners V, LLC (\"Partners V\") is the sole general partner of Ventures V. Dr. Parmar is a managing member of Partners V and may be deemed to share voting and investment power over the securities held by Ventures V. Dr. Parmar disclaims beneficial ownership of the securities held by Ventures V except to the extent of his pecuniary interest therein."}],"balance_after":2478969,"source":{"system":"sec-edgar","filing":"0001209191-22-034860","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1739410/000120919122034860/doc4.xml","form_type":"4"}},{"id":2240287,"issuer":{"id":6838,"kind":"organization","name":"Rallybio Corp","symbol":"RLYB"},"owners":[{"id":25025,"kind":"organization","name":"5AM Opportunities I, L.P.","position":1,"cik":"0001753000","reported_name":"5AM Opportunities I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":18314,"kind":"person","name":"Schwab Andrew J.","position":2,"cik":"0001598549","reported_name":"Schwab Andrew J.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":25026,"kind":"organization","name":"5AM Opportunities I (GP), LLC","position":3,"cik":"0001790778","reported_name":"5AM Opportunities I (GP), LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":25024,"kind":"organization","name":"5AM Partners V, LLC","position":4,"cik":"0001791889","reported_name":"5AM Partners V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":25023,"kind":"organization","name":"5AM Ventures V, L.P.","position":5,"cik":"0001674324","reported_name":"5AM Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":21277,"kind":"person","name":"ROCKLAGE SCOTT M","position":6,"cik":"0001219014","reported_name":"ROCKLAGE SCOTT M","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2022-06-07T21:02:08.000Z","date":"2022-06-03","kind":"sale","acquired":false,"shares":99671,"price":12.5,"value":1245887.5,"ownership":{"direct":false,"nature":"By 5AM Ventures V, L.P."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F2","text":"Shares are held by 5AM Ventures V, L.P. (\"Ventures V\"). 5AM Partners V, LLC is the general partner of Ventures V and may be deemed to have sole investment and voting power over the shares held by Ventures V. Each of Andrew Schwab, Dr. Kush Parmar and Dr. Scott Rocklage is a Managing Member of 5AM Partners V, LLC, and may be deemed to have shared voting and dispositive power over the shares held by Ventures V. Therefore, each of Andrew  Schwab, Dr. Kush Parmar, Dr. Scott Rocklage, and 5AM Partners V, LLC may be deemed to beneficially own the shares held by Ventures V, and each disclaims beneficial ownership over the shares held by Ventures V except to the extent of his or its pecuniary interest therein. Dr. Parmar is a director of the issuer and files separate Section 16 reports."}],"balance_after":2478969,"source":{"system":"sec-edgar","filing":"0001209191-22-034858","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1739410/000120919122034858/doc4.xml","form_type":"4"}},{"id":2240286,"issuer":{"id":6838,"kind":"organization","name":"Rallybio Corp","symbol":"RLYB"},"owners":[{"id":25025,"kind":"organization","name":"5AM Opportunities I, L.P.","position":1,"cik":"0001753000","reported_name":"5AM Opportunities I, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":18314,"kind":"person","name":"Schwab Andrew J.","position":2,"cik":"0001598549","reported_name":"Schwab Andrew J.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":25026,"kind":"organization","name":"5AM Opportunities I (GP), LLC","position":3,"cik":"0001790778","reported_name":"5AM Opportunities I (GP), LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":25024,"kind":"organization","name":"5AM Partners V, LLC","position":4,"cik":"0001791889","reported_name":"5AM Partners V, LLC","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":25023,"kind":"organization","name":"5AM Ventures V, L.P.","position":5,"cik":"0001674324","reported_name":"5AM Ventures V, L.P.","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}},{"id":21277,"kind":"person","name":"ROCKLAGE SCOTT M","position":6,"cik":"0001219014","reported_name":"ROCKLAGE SCOTT M","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":false}}],"security":"Common Stock","published_at":"2022-06-07T21:02:08.000Z","date":"2022-06-03","kind":"sale","acquired":false,"shares":50329,"price":12.5,"value":629112.5,"ownership":{"direct":false,"nature":"By 5AM Opportunities I, L.P."},"footnotes":[{"field":"ownership.nature","element":"natureOfOwnership","label":"F1","text":"Shares are held by 5AM Opportunities I, L.P. 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Dr. Parmar is a director of the issuer and files separate Section 16 reports."}],"balance_after":1251755,"source":{"system":"sec-edgar","filing":"0001209191-22-034858","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1739410/000120919122034858/doc4.xml","form_type":"4"}},{"id":2255334,"issuer":{"id":6838,"kind":"organization","name":"Rallybio Corp","symbol":"RLYB"},"owners":[{"id":79753,"kind":"person","name":"Liu Hui","position":1,"cik":"0001790518","reported_name":"Liu Hui","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Option (Right to Buy)","published_at":"2022-05-27T00:13:02.000Z","date":"2022-05-24","kind":"grant","acquired":true,"shares":2240,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The option was granted under the Company's 2021 Equity Incentive Plan.  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