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by multiplying (a) the aggregate number of shares underlying such option immediately prior to the Effective Time by (b) the amount by which (1) the sum of $15.00 plus the aggregate amount paid per CVR exceeds (2) the exercise price of such stock option."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, this stock option was cancelled and converted into the right to receive, subject to the terms of the Merger Agreement, an amount in cash from Parent, if and when payments in respect of CVRs are required to be made, equal to the product obtained by multiplying (a) the aggregate number of shares underlying such option immediately prior to the Effective Time by (b) the amount by which (1) the sum of $15.00 plus the aggregate amount paid per CVR exceeds (2) the exercise price of such stock 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Agreement, immediately prior to the Effective Time, this stock option was cancelled and converted into the right to receive, subject to the terms of the Merger Agreement, an amount in cash from Parent, if and when payments in respect of CVRs are required to be made, equal to the product obtained by multiplying (a) the aggregate number of shares underlying such option immediately prior to the Effective Time by (b) the amount by which (1) the sum of $15.00 plus the aggregate amount paid per CVR exceeds (2) the exercise price of such stock option."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, this stock option was cancelled and converted into the right to receive, subject to the terms of the Merger Agreement, an amount in cash from Parent, if and when payments in respect of CVRs are required to be made, equal to the product obtained by multiplying (a) the aggregate 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$15.00 less (B) the exercise price of such option, plus (b) one CVR for each share underlying such option immediately prior to the Effective Time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, this stock option was cancelled and converted into the right to receive, subject to the terms of the Merger Agreement, (a) an amount in cash equal to the product obtained by multiplying (1) the aggregate number of shares underlying such option immediately prior to the Effective Time by (2) an amount equal to (A) $15.00 less (B) the exercise price of such option, plus (b) one CVR for each share underlying such option immediately prior to the Effective Time."}],"balance_after":0,"derivative":{"exercise_price":9.06,"underlying":"Common 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Agreement, immediately prior to the Effective Time, this stock option was cancelled and converted into the right to receive, subject to the terms of the Merger Agreement, (a) an amount in cash equal to the product obtained by multiplying (1) the aggregate number of shares underlying such option immediately prior to the Effective Time by (2) an amount equal to (A) $15.00 less (B) the exercise price of such option, plus (b) one CVR for each share underlying such option immediately prior to the Effective Time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, this stock option was cancelled and converted into the right to receive, subject to the terms of the Merger Agreement, (a) an amount in cash equal to the product obtained by multiplying (1) the aggregate number of shares underlying such option immediately prior to the Effective Time by (2) an amount equal to (A) $15.00 less (B) the exercise price of such option, plus (b) one CVR for each share underlying such option immediately prior to the Effective Time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, this stock option was cancelled and converted into the right to receive, subject to the terms of the Merger Agreement, (a) an amount in cash equal to the product obtained by multiplying (1) the aggregate number of shares underlying such option immediately prior to the Effective Time by (2) an amount equal to (A) $15.00 less (B) the exercise price of such option, plus (b) one CVR for each share underlying such option immediately prior to the Effective Time."}],"balance_after":0,"derivative":{"exercise_price":7.44,"underlying":"Common 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Agreement, immediately prior to the Effective Time, this stock option was cancelled and converted into the right to receive, subject to the terms of the Merger Agreement, (a) an amount in cash equal to the product obtained by multiplying (1) the aggregate number of shares underlying such option immediately prior to the Effective Time by (2) an amount equal to (A) $15.00 less (B) the exercise price of such option, plus (b) one CVR for each share underlying such option immediately prior to the Effective Time."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, this stock option was cancelled and converted into the right to receive, subject to the terms of the Merger Agreement, (a) an amount in cash equal to the product obtained by multiplying (1) the aggregate number of shares underlying such option immediately prior to the Effective Time by (2) an amount equal to (A) $15.00 less (B) the exercise price of such option, plus (b) one CVR for each share underlying such option immediately prior to the Effective Time."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Pursuant to the terms of the Merger Agreement, immediately prior to the Effective Time, this stock option was cancelled and converted into the right to receive, subject to the terms of the Merger Agreement, (a) an amount in cash equal to the product obtained by multiplying (1) the aggregate number of shares underlying such option immediately prior to the Effective Time by (2) an amount equal to (A) $15.00 less (B) the exercise price of such option, plus (b) one CVR for each share underlying such option immediately prior to the Effective Time."}],"balance_after":0,"derivative":{"exercise_price":2.47,"underlying":"Common 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dated as of December 11, 2023 (the \"Merger Agreement\"), by and among the Issuer, AstraZeneca Finance and Holdings Inc. (\"Parent\"), and Isochrone Merger Sub Inc., a wholly owned subsidiary of Parent (\"Purchaser\"), Purchaser completed a tender offer for shares of the Issuer's Common Stock at a purchase price per share of (i) $15.00 plus (ii) one non-tradable contingent value right (\"CVR\") per share representing the right to receive a contingent payment of up to $5.00 in cash upon achievement of specified milestones (collectively, the \"Offer Price\"). After completion of the tender offer, Purchaser merged with and into the Issuer (the \"Merger\"), effective as of February 19, 2024 (the \"Effective Time\"), with the Issuer continuing as the surviving entity and a wholly owned subsidiary of Parent."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000950170-24-017410","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1786255/000095017024017410/ownership.xml","form_type":"4"}},{"id":1700574,"issuer":{"id":94107,"kind":"organization","name":"Icosavax, Inc.","symbol":"ICVX"},"owners":[{"id":94109,"kind":"person","name":"Russo Thomas Joseph","position":1,"cik":"0001791973","reported_name":"Russo Thomas Joseph","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2023-12-22T18:26:26.000Z","date":"2023-12-20","kind":"sale","planned":false,"acquired":false,"shares":4430,"price":15.465,"value":68509.95,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Reflects shares sold to cover taxes arising upon accelerated vesting of restricted stock unit awards."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.46 to $15.48. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, 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 range set forth in this footnote."}],"balance_after":38037,"source":{"system":"sec-edgar","filing":"0001209191-23-059623","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1786255/000120919123059623/doc4.xml","form_type":"4"}},{"id":1700573,"issuer":{"id":94107,"kind":"organization","name":"Icosavax, Inc.","symbol":"ICVX"},"owners":[{"id":94109,"kind":"person","name":"Russo Thomas Joseph","position":1,"cik":"0001791973","reported_name":"Russo Thomas Joseph","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2023-12-22T18:26:26.000Z","date":"2023-12-20","kind":"sale","planned":false,"acquired":false,"shares":10753,"price":15.4571,"value":166210.1963,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects shares sold to cover withholding taxes upon accelerated vesting of restricted stock unit awards pursuant to a Rule10b5-1 instruction letter dated December 6, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $15.41 to $15.50. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, 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 range set forth in this footnote."}],"balance_after":42467,"source":{"system":"sec-edgar","filing":"0001209191-23-059623","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1786255/000120919123059623/doc4.xml","form_type":"4"}},{"id":1818880,"issuer":{"id":94107,"kind":"organization","name":"Icosavax, Inc.","symbol":"ICVX"},"owners":[{"id":94109,"kind":"person","name":"Russo Thomas Joseph","position":1,"cik":"0001791973","reported_name":"Russo Thomas Joseph","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2023-08-01T20:28:17.000Z","date":"2023-07-31","kind":"sale","planned":true,"acquired":false,"shares":3066,"price":8.8615,"value":27169.359,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Reflects shares sold to cover withholding taxes upon vesting of restricted stock unit awards pursuant to a Rule 10b5-1 instruction letter dated December 6, 2021."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.71 to $9.11. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, 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 range set forth in this footnote."}],"balance_after":45620,"source":{"system":"sec-edgar","filing":"0001209191-23-044084","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1786255/000120919123044084/doc4.xml","form_type":"4"}},{"id":2006298,"issuer":{"id":94107,"kind":"organization","name":"Icosavax, Inc.","symbol":"ICVX"},"owners":[{"id":94109,"kind":"person","name":"Russo Thomas Joseph","position":1,"cik":"0001791973","reported_name":"Russo Thomas Joseph","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2023-02-17T19:16:50.000Z","date":"2023-02-15","kind":"grant","acquired":true,"shares":125000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"25% of the shares subject to the option will vest on February 15, 2024, and 1/48th of the shares subject to the option vest monthly thereafter, subject to the reporting person's continued service through the applicable vesting date."}],"balance_after":125000,"derivative":{"exercise_price":9.06,"expiration_date":"2033-02-14","underlying":"Common Stock","underlying_shares":125000},"source":{"system":"sec-edgar","filing":"0001209191-23-010917","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1786255/000120919123010917/doc4.xml","form_type":"4"}},{"id":2013122,"issuer":{"id":94107,"kind":"organization","name":"Icosavax, Inc.","symbol":"ICVX"},"owners":[{"id":94109,"kind":"person","name":"Russo Thomas Joseph","position":1,"cik":"0001791973","reported_name":"Russo Thomas Joseph","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2023-02-15T20:04:39.000Z","date":"2023-02-13","kind":"sale","acquired":false,"shares":1902,"price":10.6926,"value":20337.3252,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person to cover the applicable withholding taxes upon settlement of restricted stock units issued to the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $10.41 to $11.02. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, 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 range set forth in this footnote."}],"balance_after":48686,"source":{"system":"sec-edgar","filing":"0001209191-23-009913","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1786255/000120919123009913/doc4.xml","form_type":"4"}},{"id":2015001,"issuer":{"id":94107,"kind":"organization","name":"Icosavax, Inc.","symbol":"ICVX"},"owners":[{"id":94109,"kind":"person","name":"Russo Thomas Joseph","position":1,"cik":"0001791973","reported_name":"Russo Thomas Joseph","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2023-02-14T17:22:01.000Z","date":"2022-05-31","kind":"grant","acquired":true,"shares":1667,"price":5.77,"value":9618.59,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"These shares were acquired under the Issuer's Employee Stock Purchase Plan on May 31, 2022 by the Reporting person in a transaction exempt from Section 16(b) pursuant to Rule 16b-3(c)."}],"balance_after":50588,"source":{"system":"sec-edgar","filing":"0001209191-23-009262","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1786255/000120919123009262/doc5.xml","form_type":"5"}},{"id":2117336,"issuer":{"id":94107,"kind":"organization","name":"Icosavax, Inc.","symbol":"ICVX"},"owners":[{"id":94109,"kind":"person","name":"Russo Thomas Joseph","position":1,"cik":"0001791973","reported_name":"Russo Thomas Joseph","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2022-11-14T19:05:27.000Z","date":"2022-11-10","kind":"grant","acquired":true,"shares":100000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"One-third (1/3rd) of the shares subject to the option shall vest on each of the first three anniversaries of November 10, 2022, subject to the reporting person's continued service through the applicable vesting date."}],"balance_after":100000,"derivative":{"exercise_price":2.47,"expiration_date":"2032-11-09","underlying":"Common Stock","underlying_shares":100000},"source":{"system":"sec-edgar","filing":"0001209191-22-056838","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1786255/000120919122056838/doc4.xml","form_type":"4"}},{"id":2197103,"issuer":{"id":94107,"kind":"organization","name":"Icosavax, Inc.","symbol":"ICVX"},"owners":[{"id":94109,"kind":"person","name":"Russo Thomas Joseph","position":1,"cik":"0001791973","reported_name":"Russo Thomas Joseph","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2022-08-02T21:43:30.000Z","date":"2022-08-02","kind":"sale","acquired":false,"shares":495,"price":6.7038,"value":3318.381,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person to cover the applicable withholding taxes upon settlement of restricted stock units issued to the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.460 to $6.865. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, 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 range set forth in this footnote."}],"balance_after":48921,"source":{"system":"sec-edgar","filing":"0001209191-22-044023","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1786255/000120919122044023/doc4.xml","form_type":"4"}},{"id":2197102,"issuer":{"id":94107,"kind":"organization","name":"Icosavax, Inc.","symbol":"ICVX"},"owners":[{"id":94109,"kind":"person","name":"Russo Thomas Joseph","position":1,"cik":"0001791973","reported_name":"Russo Thomas Joseph","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2022-08-02T21:43:30.000Z","date":"2022-08-01","kind":"sale","acquired":false,"shares":1825,"price":6.6374,"value":12113.255,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person to cover the applicable withholding taxes upon settlement of restricted stock units issued to the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.38 to $7.17. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, 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 range set forth in this footnote."}],"balance_after":49416,"source":{"system":"sec-edgar","filing":"0001209191-22-044023","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1786255/000120919122044023/doc4.xml","form_type":"4"}},{"id":2197101,"issuer":{"id":94107,"kind":"organization","name":"Icosavax, Inc.","symbol":"ICVX"},"owners":[{"id":94109,"kind":"person","name":"Russo Thomas Joseph","position":1,"cik":"0001791973","reported_name":"Russo Thomas Joseph","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2022-08-02T21:43:30.000Z","date":"2022-07-29","kind":"sale","acquired":false,"shares":639,"price":7.1076,"value":4541.7564,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares withheld by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person to cover the applicable withholding taxes upon settlement of restricted stock units issued to the Reporting Person."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $6.93 to $7.75. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, 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 range set forth in this footnote."}],"balance_after":51241,"source":{"system":"sec-edgar","filing":"0001209191-22-044023","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1786255/000120919122044023/doc4.xml","form_type":"4"}},{"id":2396940,"issuer":{"id":94107,"kind":"organization","name":"Icosavax, Inc.","symbol":"ICVX"},"owners":[{"id":94109,"kind":"person","name":"Russo Thomas Joseph","position":1,"cik":"0001791973","reported_name":"Russo Thomas Joseph","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Stock Option (Right to Buy)","published_at":"2022-02-14T19:08:13.000Z","date":"2022-02-10","kind":"grant","acquired":true,"shares":74500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"25% of the shares subject to the option will vest on February 10, 2023, and 1/48th of the shares subject to the option vest monthly thereafter, subject to the reporting person's continued service through the applicable vesting date."}],"balance_after":74500,"derivative":{"exercise_price":17.55,"expiration_date":"2032-02-09","underlying":"Common Stock","underlying_shares":74500},"source":{"system":"sec-edgar","filing":"0001209191-22-009522","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1786255/000120919122009522/doc4.xml","form_type":"4"}},{"id":2396939,"issuer":{"id":94107,"kind":"organization","name":"Icosavax, Inc.","symbol":"ICVX"},"owners":[{"id":94109,"kind":"person","name":"Russo Thomas Joseph","position":1,"cik":"0001791973","reported_name":"Russo Thomas Joseph","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2022-02-14T19:08:13.000Z","date":"2022-02-10","kind":"grant","acquired":true,"shares":17714,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units (\"RSUs\") which will vest as to 25% of the total number of RSUs granted on each of the first four anniversaries of February 10, 2022, subject to the reporting persons continued service through the applicable vesting date.  Each RSU represents a contingent right to receive one share of common stock of the Issuer and the RSUs have no expiration date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes 1,666 shares acquired under the Issuer's employee stock purchase plan on November 30, 2021."}],"balance_after":51880,"source":{"system":"sec-edgar","filing":"0001209191-22-009522","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1786255/000120919122009522/doc4.xml","form_type":"4"}},{"id":2619613,"issuer":{"id":94107,"kind":"organization","name":"Icosavax, Inc.","symbol":"ICVX"},"owners":[{"id":94109,"kind":"person","name":"Russo Thomas Joseph","position":1,"cik":"0001791973","reported_name":"Russo Thomas Joseph","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2021-08-02T21:19:07.000Z","date":"2021-07-30","kind":"grant","acquired":true,"shares":32500,"price":15,"value":487500.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents restricted stock units (\"RSUs\") granted on July 30, 2021, 25% of the total number of RSUs granted vest on each of the first four anniversaries of July 28, 2021, the vesting commencement date, subject to the reporting person's continued service on the applicable vesting date. Vesting of the RSUs shall accelerate as provided in the reporting person's offer letter. Each RSU represents a contingent right to receive one share of common stock of the Issuer."}],"balance_after":32500,"source":{"system":"sec-edgar","filing":"0000899243-21-031136","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1786255/000089924321031136/doc4.xml","form_type":"4"}},{"id":2761002,"issuer":{"id":5216,"kind":"organization","name":"ASSEMBLY BIOSCIENCES, INC."},"owners":[{"id":94109,"kind":"person","name":"Russo Thomas Joseph","position":1,"cik":"0001791973","reported_name":"Russo Thomas Joseph","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CFO"}}],"security":"Stock Option (right to buy)","published_at":"2021-04-02T20:41:57.000Z","date":"2021-03-29","kind":"grant","acquired":true,"shares":67500,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Grant of stock options. The stock options vest over four years, assuming continuous service on each vesting date, as follows: 25% vest on the first anniversary of the date of grant, March 29, 2022; and the remaining 75% vest in 36 approximately equal monthly installments, with the options becoming fully vested on March 29, 2025."}],"balance_after":67500,"derivative":{"exercise_price":4.33,"expiration_date":"2031-03-29","underlying":"Common Stock","underlying_shares":67500},"source":{"system":"sec-edgar","filing":"0001209191-21-024636","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1426800/000120919121024636/doc4.xml","form_type":"4"}},{"id":2761001,"issuer":{"id":5216,"kind":"organization","name":"ASSEMBLY BIOSCIENCES, INC."},"owners":[{"id":94109,"kind":"person","name":"Russo Thomas Joseph","position":1,"cik":"0001791973","reported_name":"Russo Thomas Joseph","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CFO"}}],"security":"Common Stock","published_at":"2021-04-02T20:41:57.000Z","date":"2021-03-29","kind":"grant","acquired":true,"shares":11250,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Grant of restricted stock units. The restricted stock units vest in four approximately equal installments, assuming continuous service on each vesting date, as follows: March 29, 2022; March 29, 2023; March 29, 2024; and March 29, 2025."}],"balance_after":54633,"source":{"system":"sec-edgar","filing":"0001209191-21-024636","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1426800/000120919121024636/doc4.xml","form_type":"4"}},{"id":3190783,"issuer":{"id":5216,"kind":"organization","name":"ASSEMBLY BIOSCIENCES, INC."},"owners":[{"id":94109,"kind":"person","name":"Russo Thomas Joseph","position":1,"cik":"0001791973","reported_name":"Russo Thomas Joseph","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CFO"}}],"security":"Common Stock","published_at":"2020-03-31T20:14:14.000Z","date":"2020-03-27","kind":"grant","acquired":true,"shares":43383,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Grant of restricted stock units. The restricted stock units vest in four approximately equal installments, assuming continuous service on each vesting date, as follows: March 29, 2021; March 29, 2022; March 29, 2023, and March 29, 2024."}],"balance_after":43383,"source":{"system":"sec-edgar","filing":"0001209191-20-021797","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1426800/000120919120021797/doc4.xml","form_type":"4"}},{"id":3387119,"issuer":{"id":5216,"kind":"organization","name":"ASSEMBLY BIOSCIENCES, INC."},"owners":[{"id":94109,"kind":"person","name":"Russo Thomas Joseph","position":1,"cik":"0001791973","reported_name":"Russo Thomas Joseph","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"CFO"}}],"security":"Stock Option (right to buy)","published_at":"2019-10-28T22:51:55.000Z","date":"2019-10-28","kind":"grant","acquired":true,"shares":185000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Grant of stock options. The stock options vest over four years, assuming continuous service on each vesting date, as follows: 25% shall vest on the first anniversary of the date of grant, October 28, 2020; and the remaining 75% shall vest in 36 approximately equal monthly installments, with the options becoming fully vested on October 28, 2023."}],"balance_after":185000,"derivative":{"exercise_price":15.69,"expiration_date":"2019-10-28","underlying":"Common Stock","underlying_shares":185000},"source":{"system":"sec-edgar","filing":"0001209191-19-054274","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1426800/000120919119054274/doc4.xml","form_type":"4"}}]}