{"transactions":[{"id":851652,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Operating Officer"}}],"security":"Common Stock","published_at":"2026-03-10T21:00:02.000Z","date":"2026-03-08","kind":"tax_withholding","planned":false,"acquired":false,"shares":1924,"price":3.22,"value":6195.28,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 26,317 shares of Common Stock and 76,614 RSUs."}],"balance_after":102931,"source":{"system":"sec-edgar","filing":"0001193125-26-100339","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000119312526100339/ownership.xml","form_type":"4"}},{"id":856497,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Deve"}}],"security":"Stock Options (Right to Buy)","published_at":"2026-03-06T22:00:28.000Z","date":"2026-03-04","kind":"grant","planned":false,"acquired":true,"shares":77824,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The options vest as to one-third of the shares on March 4, 2027, an additional one-third of the shares on March 4, 2028 and the remaining one-third of the shares on March 4, 2029."}],"balance_after":77824,"derivative":{"exercise_price":3.35,"expiration_date":"2036-03-04","underlying":"Common Stock","underlying_shares":77824},"source":{"system":"sec-edgar","filing":"0001193125-26-096829","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000119312526096829/ownership.xml","form_type":"4"}},{"id":856496,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Deve"}}],"security":"Common Stock","published_at":"2026-03-06T22:00:28.000Z","date":"2026-03-05","kind":"tax_withholding","planned":false,"acquired":false,"shares":3814,"price":3.27,"value":12471.78,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Represents 22,735 shares of Common Stock and 82,120 RSUs."}],"balance_after":104855,"source":{"system":"sec-edgar","filing":"0001193125-26-096829","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000119312526096829/ownership.xml","form_type":"4"}},{"id":856495,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Deve"}}],"security":"Common Stock","published_at":"2026-03-06T22:00:28.000Z","date":"2026-03-04","kind":"grant","planned":false,"acquired":true,"shares":57462,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each Restricted Stock Unit (\"RSU\") represents the right to receive one share of Common Stock upon vesting. The RSUs vest as to one-third of the shares on March 4, 2027, an additional one-third of the shares on March 4, 2028 and the remaining one-third of the shares on March 4, 2029."}],"balance_after":108669,"source":{"system":"sec-edgar","filing":"0001193125-26-096829","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000119312526096829/ownership.xml","form_type":"4"}},{"id":1212941,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Deve"}}],"security":"Common Stock","published_at":"2025-03-11T22:49:17.000Z","date":"2025-03-07","kind":"tax_withholding","planned":false,"acquired":false,"shares":1924,"price":7.95,"value":15295.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 15,633 shares of Common Stock and 35,574 RSUs."}],"balance_after":51207,"source":{"system":"sec-edgar","filing":"0000950170-25-037445","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017025037445/ownership.xml","form_type":"4"}},{"id":1217951,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Deve"}}],"security":"Performance Share Units","published_at":"2025-03-07T21:50:06.000Z","date":"2025-03-05","kind":"grant","planned":false,"acquired":true,"shares":49426,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Each performance share unit (\"PSU\") represents a contingent right to receive one share of Common Stock upon vesting. The PSUs vest on March 5, 2028, following the completion of the performance period, which begins on January 1, 2025 and ends on December 31, 2027. Ranging between 0-200% of the target number of PSUs (as reflected in Table II above), the PSUs vest based on the total shareholder return of Common Stock relative to the total stockholder return of the components of the Russell 2000 Index."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Each performance share unit (\"PSU\") represents a contingent right to receive one share of Common Stock upon vesting. The PSUs vest on March 5, 2028, following the completion of the performance period, which begins on January 1, 2025 and ends on December 31, 2027. Ranging between 0-200% of the target number of PSUs (as reflected in Table II above), the PSUs vest based on the total shareholder return of Common Stock relative to the total stockholder return of the components of the Russell 2000 Index."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Each performance share unit (\"PSU\") represents a contingent right to receive one share of Common Stock upon vesting. The PSUs vest on March 5, 2028, following the completion of the performance period, which begins on January 1, 2025 and ends on December 31, 2027. Ranging between 0-200% of the target number of PSUs (as reflected in Table II above), the PSUs vest based on the total shareholder return of Common Stock relative to the total stockholder return of the components of the Russell 2000 Index."}],"balance_after":49426,"derivative":{"exercise_date":"2028-03-05","underlying":"Common Stock","underlying_shares":49426},"source":{"system":"sec-edgar","filing":"0000950170-25-035609","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017025035609/ownership.xml","form_type":"4"}},{"id":1217950,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Deve"}}],"security":"Stock Options (Right to Buy)","published_at":"2025-03-07T21:50:06.000Z","date":"2025-03-05","kind":"grant","planned":false,"acquired":true,"shares":34837,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The options vest as to one-third of the shares on March 5, 2026, an additional one-third of the shares on March 5, 2027 and the remaining one-third of the shares on March 5, 2028."}],"balance_after":34837,"derivative":{"exercise_price":7.84,"expiration_date":"2035-03-05","underlying":"Common Stock","underlying_shares":34837},"source":{"system":"sec-edgar","filing":"0000950170-25-035609","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017025035609/ownership.xml","form_type":"4"}},{"id":1217949,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Deve"}}],"security":"Common Stock","published_at":"2025-03-07T21:50:06.000Z","date":"2025-03-05","kind":"grant","planned":false,"acquired":true,"shares":24713,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"Each Restricted Stock Unit (\"RSU\") represents the right to receive one share of Common Stock upon vesting. The RSUs vest as to one-third of the shares on March 5, 2026, an additional one-third of the shares on March 5, 2027 and the remaining one-third of the shares on March 5, 2028."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Represents 12,050 shares of Common Stock and 41,081 RSUs."}],"balance_after":53131,"source":{"system":"sec-edgar","filing":"0000950170-25-035609","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017025035609/ownership.xml","form_type":"4"}},{"id":1217948,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Deve"}}],"security":"Common Stock","published_at":"2025-03-07T21:50:06.000Z","date":"2025-03-05","kind":"tax_withholding","planned":false,"acquired":false,"shares":936,"price":7.84,"value":7338.24,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units (\"RSUs\")."}],"balance_after":28418,"source":{"system":"sec-edgar","filing":"0000950170-25-035609","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017025035609/ownership.xml","form_type":"4"}},{"id":1247058,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Deve"}}],"security":"Common Stock","published_at":"2025-02-26T01:57:51.000Z","date":"2025-02-21","kind":"tax_withholding","planned":false,"acquired":false,"shares":499,"price":8.04,"value":4011.96,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 10,309 shares of Common Stock and 19,045 RSUs."}],"balance_after":29354,"source":{"system":"sec-edgar","filing":"0000950170-25-027214","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017025027214/ownership.xml","form_type":"4"}},{"id":1523550,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Deve"}}],"security":"Common Stock","published_at":"2024-05-08T12:50:48.000Z","date":"2024-05-06","kind":"sale","planned":false,"acquired":false,"shares":25463,"price":25.65,"value":653125.95,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"These transactions were executed in multiple trades at prices ranging from $25.57 to $25.73. The reporting person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Represents 9,382 shares of Common Stock and 20,471 RSUs."}],"balance_after":29853,"source":{"system":"sec-edgar","filing":"0000950170-24-055108","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017024055108/ownership.xml","form_type":"4"}},{"id":1523549,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Deve"}}],"security":"Common Stock","published_at":"2024-05-08T12:50:48.000Z","date":"2024-05-06","kind":"sale","planned":false,"acquired":false,"shares":22923,"price":25.11,"value":575596.53,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"These transactions were executed in multiple trades at prices ranging from $24.45 to $25.40. The reporting person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price."}],"balance_after":55316,"source":{"system":"sec-edgar","filing":"0000950170-24-055108","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017024055108/ownership.xml","form_type":"4"}},{"id":1584695,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Deve"}}],"security":"Common Stock","published_at":"2024-03-11T20:01:53.000Z","date":"2024-03-08","kind":"tax_withholding","planned":false,"acquired":false,"shares":1771,"price":17.02,"value":30142.42,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 57,768 shares of Common Stock and 20,471 RSUs."}],"balance_after":78239,"source":{"system":"sec-edgar","filing":"0000950170-24-029206","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017024029206/ownership.xml","form_type":"4"}},{"id":1589587,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Deve"}}],"security":"Stock Options (Right to Buy)","published_at":"2024-03-08T01:14:48.000Z","date":"2024-03-05","kind":"grant","planned":false,"acquired":true,"shares":35249,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The options vest as to one-third of the shares on March 5, 2025, an additional one-third of the shares on March 5, 2026 and the remaining one-third of the shares on March 5, 2027."}],"balance_after":35249,"derivative":{"exercise_price":16.34,"expiration_date":"2024-03-05","underlying":"Common Stock","underlying_shares":35249},"source":{"system":"sec-edgar","filing":"0000950170-24-028293","document":"ownership.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017024028293/ownership.xml","form_type":"4"}},{"id":1589586,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Deve"}}],"security":"Common Stock","published_at":"2024-03-08T01:14:48.000Z","date":"2024-03-05","kind":"grant","planned":false,"acquired":true,"shares":8032,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each Restricted Stock Unit (\"RSU\") represents the right to receive one share of Common Stock upon vesting. The RSUs vest as to one-third of the shares on March 5, 2025, an additional one-third of the shares on March 5, 2026 and the remaining one-third of the shares on March 5, 2027."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 54,033 shares of Common Stock and 25,977 RSUs."}],"balance_after":80010,"source":{"system":"sec-edgar","filing":"0000950170-24-028293","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017024028293/ownership.xml","form_type":"4"}},{"id":1589584,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Deve"}}],"security":"Common Stock","published_at":"2024-03-08T01:09:20.000Z","date":"2024-03-05","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":53590,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents unearned performance-based restricted shares granted on June 2, 2022 that were cancelled on March 5, 2024."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 54,033 shares of Common Stock and 17,945 RSUs."}],"balance_after":71978,"source":{"system":"sec-edgar","filing":"0000950170-24-028273","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017024028273/ownership.xml","form_type":"4"}},{"id":1616475,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Deve"}}],"security":"Common Stock","published_at":"2024-02-27T18:37:09.000Z","date":"2024-02-24","kind":"tax_withholding","planned":false,"acquired":false,"shares":330,"price":16.96,"value":5596.8,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 54,033 shares of Common Stock, 17,945 RSUs and 53,590 shares of Restricted Stock."}],"balance_after":125568,"source":{"system":"sec-edgar","filing":"0000950170-24-020886","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017024020886/ownership.xml","form_type":"4"}},{"id":1616474,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Deve"}}],"security":"Common Stock","published_at":"2024-02-27T18:37:09.000Z","date":"2024-02-23","kind":"tax_withholding","planned":false,"acquired":false,"shares":495,"price":16.96,"value":8395.2,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units (\"RSUs\")."}],"balance_after":125898,"source":{"system":"sec-edgar","filing":"0000950170-24-020886","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017024020886/ownership.xml","form_type":"4"}},{"id":1734910,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Deve"}}],"security":"Common Stock","published_at":"2023-11-20T22:14:35.000Z","date":"2023-11-20","kind":"sale","planned":false,"acquired":false,"shares":155,"price":11.01,"value":1706.55,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Represents 52,481 shares of Common Stock, 20,322 RSUs and 53,590 shares of Restricted Stock."}],"balance_after":126393,"source":{"system":"sec-edgar","filing":"0000950170-23-065189","document":"ownership.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000095017023065189/ownership.xml","form_type":"4"}},{"id":1784947,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Stock Option (Right-to-Buy)","published_at":"2023-09-08T21:43:54.000Z","date":"2023-09-07","kind":"grant","planned":false,"acquired":true,"shares":85000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The options will vest in full on September 7, 2026, subject to continuous service through such date."}],"balance_after":85000,"derivative":{"exercise_price":6.51,"expiration_date":"2033-09-07","underlying":"Common Stock","underlying_shares":85000},"source":{"system":"sec-edgar","filing":"0001209191-23-048830","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919123048830/doc4.xml","form_type":"4"}},{"id":1870444,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Stock Options (Right to Buy)","published_at":"2023-06-02T20:02:35.000Z","date":"2023-06-01","kind":"grant","planned":false,"acquired":true,"shares":75979,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The options vest as to one-third of the shares on March 8, 2024, an additional one-third of the shares on March 8, 2025 and the remaining one-third\nof the shares on March 8, 2026."}],"balance_after":75979,"derivative":{"exercise_price":6.81,"expiration_date":"2033-06-01","underlying":"Common Stock","underlying_shares":75979},"source":{"system":"sec-edgar","filing":"0001209191-23-033651","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919123033651/doc4.xml","form_type":"4"}},{"id":1870443,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2023-06-02T20:02:35.000Z","date":"2023-06-01","kind":"grant","planned":false,"acquired":true,"shares":16519,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each Restricted Stock Unit (\"RSU\") represents the right to receive one share of Common Stock upon vesting. The RSUs vest as to one-third of the shares on March 8, 2024, an additional one-third of the shares on March 8, 2025 and the remaining one-third of the shares on March 8, 2026."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 52,636 shares of Common Stock, 20,322 RSUs and 53,590 shares of Restricted Stock."}],"balance_after":126548,"source":{"system":"sec-edgar","filing":"0001209191-23-033651","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919123033651/doc4.xml","form_type":"4"}},{"id":1987625,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2023-02-28T22:12:40.000Z","date":"2023-02-26","kind":"tax_withholding","acquired":false,"shares":901,"price":10.95,"value":9865.95,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 52,636 shares of Common Stock, 3,803 RSUs and 53,590 shares of Restricted Stock."}],"balance_after":110029,"source":{"system":"sec-edgar","filing":"0001209191-23-013768","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919123013768/doc4.xml","form_type":"4"}},{"id":1987624,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2023-02-28T22:12:40.000Z","date":"2023-02-24","kind":"tax_withholding","acquired":false,"shares":329,"price":10.95,"value":3602.55,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units (\"RSUs\")."}],"balance_after":110930,"source":{"system":"sec-edgar","filing":"0001209191-23-013768","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919123013768/doc4.xml","form_type":"4"}},{"id":1990833,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2023-02-27T23:11:43.000Z","date":"2023-02-23","kind":"tax_withholding","acquired":false,"shares":495,"price":11.32,"value":5603.4,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 50,319 shares of Common Stock, 7,350 RSUs and 53,590 shares of Restricted Stock."}],"balance_after":111259,"source":{"system":"sec-edgar","filing":"0001209191-23-013357","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919123013357/doc4.xml","form_type":"4"}},{"id":2242730,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2022-06-06T23:26:38.000Z","date":"2022-06-02","kind":"grant","acquired":true,"shares":53590,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The reporting person was granted restricted shares of common stock (the \"Award\") pursuant to a Performance-Based Restricted Stock Agreement by and between Aspen Aerogels, Inc. and the reporting person subject to the 2014 Employee, Director and Consultant Equity Incentive Plan. In order for a tranche of this Award to vest, both time and performance vesting conditions must be satisfied. For the time vesting condition, a tranche will vest at the later of (i) three years from the grant date or (ii) one year from the date when an applicable performance hurdle is achieved, subject to a maximum five-year vesting period for shares with respect to which the performance hurdle has been achieved. With respect to the performance vesting condition, there are three tranches with different share price hurdles and a five-year total performance period. If a share price hurdle is not met after five years, the applicable tranche is forfeited."},{"field":"shares","element":"transactionShares","label":"F2","text":"(cont.) The share price hurdle is met by reference to a 30-day volume weighted average price (VWAP) that is maintained for 60 days (the \"Share Price Hurdle\"). The first tranche consists of 34% of the restricted shares of common stock granted under the Award, with the Share Price Hurdle equal to $43.33.The second tranche consists of 33% of the restricted shares of common stock granted under the Award, with the Share Price Hurdle equal to $64.99. The third tranche consists of 33% of the restricted shares of common stock granted under the Award, with the Share Price Hurdle equal to $86.65."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The reporting person was granted restricted shares of common stock (the \"Award\") pursuant to a Performance-Based Restricted Stock Agreement by and between Aspen Aerogels, Inc. and the reporting person subject to the 2014 Employee, Director and Consultant Equity Incentive Plan. In order for a tranche of this Award to vest, both time and performance vesting conditions must be satisfied. For the time vesting condition, a tranche will vest at the later of (i) three years from the grant date or (ii) one year from the date when an applicable performance hurdle is achieved, subject to a maximum five-year vesting period for shares with respect to which the performance hurdle has been achieved. With respect to the performance vesting condition, there are three tranches with different share price hurdles and a five-year total performance period. If a share price hurdle is not met after five years, the applicable tranche is forfeited."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"(cont.) The share price hurdle is met by reference to a 30-day volume weighted average price (VWAP) that is maintained for 60 days (the \"Share Price Hurdle\"). The first tranche consists of 34% of the restricted shares of common stock granted under the Award, with the Share Price Hurdle equal to $43.33.The second tranche consists of 33% of the restricted shares of common stock granted under the Award, with the Share Price Hurdle equal to $64.99. The third tranche consists of 33% of the restricted shares of common stock granted under the Award, with the Share Price Hurdle equal to $86.65."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Represents 49,388 shares of Common Stock, 8,776 Restricted Stock Units and 53,590 Restricted Stock."}],"balance_after":111754,"source":{"system":"sec-edgar","filing":"0001209191-22-034711","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919122034711/doc4.xml","form_type":"4"}},{"id":2365996,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2022-03-02T01:05:09.000Z","date":"2022-02-27","kind":"tax_withholding","acquired":false,"shares":3089,"price":29.51,"value":91156.39,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of RSUs."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Represents 49,388 shares of common stock and 8,776 RSUs."}],"balance_after":58164,"source":{"system":"sec-edgar","filing":"0001209191-22-014412","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919122014412/doc4.xml","form_type":"4"}},{"id":2365995,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2022-03-02T01:05:09.000Z","date":"2022-02-26","kind":"tax_withholding","acquired":false,"shares":863,"price":29.51,"value":25467.13,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of time-based restricted stock units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 41,917 shares of common stock and 19,336 RSUs."}],"balance_after":61253,"source":{"system":"sec-edgar","filing":"0001209191-22-014412","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919122014412/doc4.xml","form_type":"4"}},{"id":2372576,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Stock Option (Right to Buy)","published_at":"2022-02-26T00:12:49.000Z","date":"2022-02-23","kind":"grant","acquired":true,"shares":22408,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The options vest as to one-third of the shares on February 23, 2023, and additional one-third of the shares on February 23, 2024 and the remaining one-third of the shares on February 23, 2025."}],"balance_after":22408,"derivative":{"exercise_price":26.29,"expiration_date":"2032-02-23","underlying":"Common Stock","underlying_shares":22408},"source":{"system":"sec-edgar","filing":"0001209191-22-013371","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919122013371/doc4.xml","form_type":"4"}},{"id":2372575,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2022-02-26T00:12:49.000Z","date":"2022-02-24","kind":"tax_withholding","acquired":false,"shares":330,"price":29,"value":9570.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Represents 40,183 shares of Common Stock and 21,933 RSUs."}],"balance_after":62116,"source":{"system":"sec-edgar","filing":"0001209191-22-013371","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919122013371/doc4.xml","form_type":"4"}},{"id":2372574,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2022-02-26T00:12:49.000Z","date":"2022-02-23","kind":"grant","acquired":true,"shares":4279,"price":26.29,"value":112494.91,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each Restricted Stock Unit (\"RSU\") represents the right to receive one share of Common Stock upon vesting.  The RSUs vest as to one-third of the shares on February 23, 2023, an additional one-third of the shares on February 23, 2024 and the remaining one-third of the shares on February 23, 2025."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 39,563 shares of Common Stock and 22,883 RSUs."}],"balance_after":62446,"source":{"system":"sec-edgar","filing":"0001209191-22-013371","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919122013371/doc4.xml","form_type":"4"}},{"id":2615454,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2021-08-04T20:26:33.000Z","date":"2021-08-03","kind":"sale","acquired":false,"shares":5470,"price":37.01,"value":202444.7,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Average price with actual price ranging from $36.46 and $37.66. The reporting person will provide to the staff of the Securities and Exchange Commission, the issuer or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 39,563 shares of Common Stock and 18,604 Restricted Stock Units."}],"balance_after":58167,"source":{"system":"sec-edgar","filing":"0001209191-21-049623","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919121049623/doc4.xml","form_type":"4"}},{"id":2821184,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2021-03-02T21:36:38.000Z","date":"2021-02-28","kind":"tax_withholding","acquired":false,"shares":2529,"price":22.25,"value":56270.25,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of time-based restricted stock units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Represents 45,033 shares of Common Stock and 18,604 Restricted Stock Units."}],"balance_after":63637,"source":{"system":"sec-edgar","filing":"0001209191-21-016033","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919121016033/doc4.xml","form_type":"4"}},{"id":2821183,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2021-03-02T21:36:38.000Z","date":"2021-02-27","kind":"tax_withholding","acquired":false,"shares":3287,"price":22.25,"value":73135.75,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of time-based restricted stock units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Represents 39,228 shares of Common Stock and 26,938 Restricted Stock Units."}],"balance_after":66166,"source":{"system":"sec-edgar","filing":"0001209191-21-016033","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919121016033/doc4.xml","form_type":"4"}},{"id":2821182,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2021-03-02T21:36:38.000Z","date":"2021-02-26","kind":"tax_withholding","acquired":false,"shares":947,"price":22.25,"value":21070.75,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of time-based restricted stock units (\"RSUs\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 31,955 shares of Common Stock and 37,498 Restricted Stock Units."}],"balance_after":69453,"source":{"system":"sec-edgar","filing":"0001209191-21-016033","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919121016033/doc4.xml","form_type":"4"}},{"id":2830140,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Stock Option (Right to Buy)","published_at":"2021-02-26T22:20:38.000Z","date":"2021-02-24","kind":"grant","acquired":true,"shares":15671,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The options vest as to one-third of the shares on February 24, 2022, an additional one-third of the shares on February 24, 2023 and the remaining one-third of the shares on February 24, 2024."}],"balance_after":15671,"derivative":{"exercise_price":24.13,"expiration_date":"2031-02-24","underlying":"Common Stock","underlying_shares":15671},"source":{"system":"sec-edgar","filing":"0001209191-21-014887","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919121014887/doc4.xml","form_type":"4"}},{"id":2830139,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2021-02-26T22:20:38.000Z","date":"2021-02-24","kind":"grant","acquired":true,"shares":2849,"price":24.13,"value":68746.37,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each Restricted Stock Unit (\"RSU\") represents the right to receive one share of Common Stock upon vesting.  The RSUs vest as to one-third of the shares on February 24, 2022, an additional one-third of the shares on February 24, 2023 and the remaining one-third of the shares on February 24, 2024."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 30,304 shares of Common Stock and 40,096 Restricted Stock Units."}],"balance_after":70400,"source":{"system":"sec-edgar","filing":"0001209191-21-014887","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919121014887/doc4.xml","form_type":"4"}},{"id":2942944,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Stock Options (Right to Buy)","published_at":"2020-12-16T22:50:04.000Z","date":"2020-12-15","kind":"grant","acquired":true,"shares":7793,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The options vest as to one-third of the shares on December 15, 2021, an additional one-third of the shares on December 15, 2022 and the remaining one-third of the shares on December 15, 2023."}],"balance_after":7793,"derivative":{"exercise_price":16.05,"expiration_date":"2030-12-15","underlying":"Common Stock","underlying_shares":7793},"source":{"system":"sec-edgar","filing":"0001209191-20-063858","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919120063858/doc4.xml","form_type":"4"}},{"id":2971540,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Stock Option (Right to Buy)","published_at":"2020-11-20T21:34:37.000Z","date":"2020-11-18","kind":"exercise","acquired":false,"shares":27308,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This option is fully vested and exercisable."}],"balance_after":0,"derivative":{"exercise_price":4.14,"expiration_date":"2027-02-28","underlying":"Common Stock","underlying_shares":27308},"source":{"system":"sec-edgar","filing":"0001209191-20-059667","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919120059667/doc4.xml","form_type":"4"}},{"id":2971539,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2020-11-20T21:34:37.000Z","date":"2020-11-18","kind":"sale","acquired":false,"shares":27308,"price":11.61,"value":317045.88,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"Average price with actual price ranging from $11.40 and $11.92. The reporting person will provide to the staff of the Securities and Exchange Commission, the issuer, or any security holder of the issuer, upon request, full information regarding the number of shares sold at each separate price."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Represents 30,304 shares of Common Stock and 37,247 Restricted Stock Units."}],"balance_after":67551,"source":{"system":"sec-edgar","filing":"0001209191-20-059667","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919120059667/doc4.xml","form_type":"4"}},{"id":2971538,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2020-11-20T21:34:37.000Z","date":"2020-11-18","kind":"exercise","acquired":true,"shares":27308,"price":4.14,"value":113055.12,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Represents 57,612 shares of Common Stock and 37,247 Restricted Stock Units."}],"balance_after":94859,"source":{"system":"sec-edgar","filing":"0001209191-20-059667","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919120059667/doc4.xml","form_type":"4"}},{"id":3238629,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2020-03-02T21:30:07.000Z","date":"2020-02-28","kind":"tax_withholding","acquired":false,"shares":3737,"price":7.95,"value":29709.15,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units (\"RSU\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Represents 30,304 shares of Common Stock and 37,247 RSUs."}],"balance_after":67551,"source":{"system":"sec-edgar","filing":"0001209191-20-014469","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919120014469/doc4.xml","form_type":"4"}},{"id":3238628,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2020-03-02T21:30:07.000Z","date":"2020-02-27","kind":"tax_withholding","acquired":false,"shares":3660,"price":7.92,"value":28987.2,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units (\"RSU\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 21,078 shares of Common Stock and 50,210 RSUs."}],"balance_after":71288,"source":{"system":"sec-edgar","filing":"0001209191-20-014469","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919120014469/doc4.xml","form_type":"4"}},{"id":3241551,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Stock Options (Right to Buy)","published_at":"2020-02-28T21:59:53.000Z","date":"2020-02-26","kind":"grant","acquired":true,"shares":47899,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The options vest as to one-third of the shares on February 26, 2021, an additional one-third of the shares on February 26, 2022 and the remaining one-third of the shares on February 26, 2023."}],"balance_after":47899,"derivative":{"exercise_price":8.02,"expiration_date":"2030-02-26","underlying":"Common Stock","underlying_shares":47899},"source":{"system":"sec-edgar","filing":"0001209191-20-013969","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919120013969/doc4.xml","form_type":"4"}},{"id":3241550,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2020-02-28T21:59:53.000Z","date":"2020-02-26","kind":"grant","acquired":true,"shares":7793,"price":8.02,"value":62499.86,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each Restricted Stock Unit (\"RSU\") represents the right to receive one share of common stock upon vesting.  The RSUs vest as to one-third of the shares on February 26, 2021, an additional one-third of the shares on February 26, 2022 and the remaining one-third of the shares on February 26, 2023."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 14,178 shares of Common Stock and 60,770 shares of Restricted Stock Units."}],"balance_after":74948,"source":{"system":"sec-edgar","filing":"0001209191-20-013969","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919120013969/doc4.xml","form_type":"4"}},{"id":3345515,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2019-12-11T13:24:52.000Z","date":"2019-12-09","kind":"sale","acquired":false,"shares":7500,"price":7.901,"value":59257.5,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Represents 14,178 shares of Common Stock and 52,977 Restricted Stock Units."}],"balance_after":67155,"source":{"system":"sec-edgar","filing":"0001209191-19-059970","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919119059970/doc4.xml","form_type":"4"}},{"id":3382289,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"SVP, Operations and Strat Dev"}}],"security":"Common Stock","published_at":"2019-11-04T21:22:33.000Z","date":"2019-11-02","kind":"tax_withholding","acquired":false,"shares":933,"price":6.7,"value":6251.1,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 21,678 shares of Common Stock and 52,977 Restricted Stock Units."}],"balance_after":74655,"source":{"system":"sec-edgar","filing":"0001209191-19-054889","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919119054889/doc4.xml","form_type":"4"}},{"id":3619673,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, Strategic Development & Op"}}],"security":"Common Stock","published_at":"2019-03-04T21:22:51.000Z","date":"2019-02-28","kind":"tax_withholding","acquired":false,"shares":4499,"price":3.46,"value":15566.54,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Shares withheld by Registrant to satisfy the minimum statutory tax withholding requirements on vesting of Restricted Stock Units."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 19,438 shares of Common Stock and 56,150 Restricted Stock Units."}],"balance_after":75588,"source":{"system":"sec-edgar","filing":"0001209191-19-015608","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919119015608/doc4.xml","form_type":"4"}},{"id":3623609,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, Strategic Development & Op"}}],"security":"Stock Options (Right to Buy)","published_at":"2019-03-02T00:46:34.000Z","date":"2019-02-27","kind":"grant","acquired":true,"shares":63773,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The options vest as to one-third of the shares on February 27, 2020, an additional one-third of the shares on February 27, 2021 and the remaining one-third of the shares on February 27, 2022."}],"balance_after":63773,"derivative":{"exercise_price":3.63,"expiration_date":"2029-02-27","underlying":"Common Stock","underlying_shares":63773},"source":{"system":"sec-edgar","filing":"0001209191-19-015236","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919119015236/doc4.xml","form_type":"4"}},{"id":3623608,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, Strategic Development & Op"}}],"security":"Common Stock","published_at":"2019-03-02T00:46:34.000Z","date":"2019-02-27","kind":"grant","acquired":true,"shares":31680,"price":3.63,"value":114998.4,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each restricted stock unit (\"RSU\") represents the right to receive one share of common stock upon vesting.  The RSUs vest as to one-third of the shares on February 27, 2020, an additional one-third of the shares on February 27, 2021 and the remaining one-third of the shares on February 27, 2022."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 10,975 shares of Common Stock and 69,112 Restricted Stock Units."}],"balance_after":80087,"source":{"system":"sec-edgar","filing":"0001209191-19-015236","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919119015236/doc4.xml","form_type":"4"}},{"id":4020517,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, Innovation & Strategic Dev"}}],"security":"Stock Options (Right to Buy)","published_at":"2018-03-02T23:36:37.000Z","date":"2018-02-28","kind":"grant","acquired":true,"shares":51613,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The options vest as to one-third of the shares on February 28, 2019, an additional one-third of the shares on February 28, 2020, and the remaining one-third of the shares on February 28, 2021."}],"balance_after":51613,"derivative":{"exercise_price":4.6,"expiration_date":"2028-02-28","underlying":"Common Stock","underlying_shares":51613},"source":{"system":"sec-edgar","filing":"0001209191-18-015991","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919118015991/doc4.xml","form_type":"4"}},{"id":4020516,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":61817,"kind":"person","name":"Landes Gregg","position":1,"cik":"0001731877","reported_name":"Landes Gregg","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, Innovation & Strategic Dev"}}],"security":"Common Stock","published_at":"2018-03-02T23:36:37.000Z","date":"2018-02-28","kind":"grant","acquired":true,"shares":25000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Each restricted stock unit (\"RSU\") represents the right to receive one share of common stock upon vesting. The RSUs vest as to one-third of the shares on February 28, 2019, an additional one-third of the shares on February 28, 2020, and the remaining one-third of the shares on February 28, 2021."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 7,802 shares of common stock and 40,605 restricted stock units."}],"balance_after":48407,"source":{"system":"sec-edgar","filing":"0001209191-18-015991","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1145986/000120919118015991/doc4.xml","form_type":"4"}}]}