{"transactions":[{"id":2366493,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2022-03-01T19:54:19.000Z","date":"2022-02-27","kind":"tax_withholding","acquired":false,"shares":4034,"price":29.51,"value":119043.34,"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 133,236 shares of common stock and 8,041 RSUs."}],"balance_after":141277,"source":{"system":"sec-edgar","filing":"0001209191-22-014400","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919122014400/doc4.xml","form_type":"4"}},{"id":2366492,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2022-03-01T19:54:19.000Z","date":"2022-02-26","kind":"tax_withholding","acquired":false,"shares":1031,"price":29.51,"value":30424.81,"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 123,496 shares of common stock and 21,815 RSUs."}],"balance_after":145311,"source":{"system":"sec-edgar","filing":"0001209191-22-014400","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919122014400/doc4.xml","form_type":"4"}},{"id":2372928,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Stock Option (Right to Buy)","published_at":"2022-02-25T19:11:32.000Z","date":"2022-02-23","kind":"grant","acquired":true,"shares":14938,"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":14938,"derivative":{"exercise_price":26.29,"expiration_date":"2032-02-23","underlying":"Common Stock","underlying_shares":14938},"source":{"system":"sec-edgar","filing":"0001209191-22-013368","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919122013368/doc4.xml","form_type":"4"}},{"id":2372927,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2022-02-25T19:11:32.000Z","date":"2022-02-24","kind":"tax_withholding","acquired":false,"shares":359,"price":29,"value":10411.0,"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 121,410 shares of Common Stock and 24,932 RSUs."}],"balance_after":146342,"source":{"system":"sec-edgar","filing":"0001209191-22-013368","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919122013368/doc4.xml","form_type":"4"}},{"id":2372926,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2022-02-25T19:11:32.000Z","date":"2022-02-23","kind":"grant","acquired":true,"shares":2852,"price":26.29,"value":74979.08,"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 120,733 shares of Common Stock and 25,968 RSUs."}],"balance_after":146701,"source":{"system":"sec-edgar","filing":"0001209191-22-013368","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919122013368/doc4.xml","form_type":"4"}},{"id":2822019,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2021-03-02T16:33:37.000Z","date":"2021-02-28","kind":"tax_withholding","acquired":false,"shares":3191,"price":22.25,"value":70999.75,"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":"F4","text":"Represents 120,733 shares of Common Stock and 23,116 Restricted Stock Units."}],"balance_after":143849,"source":{"system":"sec-edgar","filing":"0001209191-21-016002","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919121016002/doc4.xml","form_type":"4"}},{"id":2822018,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2021-03-02T16:33:37.000Z","date":"2021-02-27","kind":"tax_withholding","acquired":false,"shares":4092,"price":22.25,"value":91047.0,"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 113,054 shares of Common Stock and 33,986 Restricted Stock Units."}],"balance_after":147040,"source":{"system":"sec-edgar","filing":"0001209191-21-016002","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919121016002/doc4.xml","form_type":"4"}},{"id":2822017,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2021-03-02T16:33:37.000Z","date":"2021-02-26","kind":"tax_withholding","acquired":false,"shares":1081,"price":22.25,"value":24052.25,"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":"F2","text":"Represents 103,372 shares of Common Stock and 47,760 Restricted Stock Units."}],"balance_after":151132,"source":{"system":"sec-edgar","filing":"0001209191-21-016002","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919121016002/doc4.xml","form_type":"4"}},{"id":2830442,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Stock Option (Right to Buy)","published_at":"2021-02-26T17:17:04.000Z","date":"2021-02-24","kind":"grant","acquired":true,"shares":17095,"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":17095,"derivative":{"exercise_price":24.13,"expiration_date":"2031-02-24","underlying":"Common Stock","underlying_shares":17095},"source":{"system":"sec-edgar","filing":"0001209191-21-014872","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919121014872/doc4.xml","form_type":"4"}},{"id":2830441,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2021-02-26T17:17:04.000Z","date":"2021-02-24","kind":"grant","acquired":true,"shares":3108,"price":24.13,"value":74996.04,"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 101,336 shares of Common Stock and 50,877 Restricted Stock Units."}],"balance_after":152213,"source":{"system":"sec-edgar","filing":"0001209191-21-014872","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919121014872/doc4.xml","form_type":"4"}},{"id":2943206,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Stock Options (Right to Buy)","published_at":"2020-12-16T17:46:16.000Z","date":"2020-12-15","kind":"grant","acquired":true,"shares":9024,"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":9024,"derivative":{"exercise_price":16.05,"expiration_date":"2030-12-15","underlying":"Common Stock","underlying_shares":9024},"source":{"system":"sec-edgar","filing":"0001209191-20-063851","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919120063851/doc4.xml","form_type":"4"}},{"id":3239018,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2020-03-02T16:29:15.000Z","date":"2020-02-28","kind":"tax_withholding","acquired":false,"shares":6698,"price":7.95,"value":53249.1,"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 (\"RSU\")."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Represents 101,336 shares of Common Stock and 47,769 RSUs."}],"balance_after":149105,"source":{"system":"sec-edgar","filing":"0001209191-20-014465","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919120014465/doc4.xml","form_type":"4"}},{"id":3239017,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2020-03-02T16:29:15.000Z","date":"2020-02-27","kind":"tax_withholding","acquired":false,"shares":4551,"price":7.92,"value":36043.92,"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 85,088 shares of Common Stock and 70,715 RSUs."}],"balance_after":155803,"source":{"system":"sec-edgar","filing":"0001209191-20-014465","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919120014465/doc4.xml","form_type":"4"}},{"id":3241948,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Stock Options (Right to Buy)","published_at":"2020-02-28T16:54:02.000Z","date":"2020-02-26","kind":"grant","acquired":true,"shares":57479,"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":57479,"derivative":{"exercise_price":8.02,"expiration_date":"2030-02-26","underlying":"Common Stock","underlying_shares":57479},"source":{"system":"sec-edgar","filing":"0001209191-20-013956","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919120013956/doc4.xml","form_type":"4"}},{"id":3241947,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2020-02-28T16:54:02.000Z","date":"2020-02-26","kind":"grant","acquired":true,"shares":9351,"price":8.02,"value":74995.02,"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 75,865 shares of Common Stock and 84,489 shares of Restricted Stock Units."}],"balance_after":160354,"source":{"system":"sec-edgar","filing":"0001209191-20-013956","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919120013956/doc4.xml","form_type":"4"}},{"id":3620181,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2019-03-04T16:20:30.000Z","date":"2019-03-01","kind":"tax_withholding","acquired":false,"shares":3274,"price":3.52,"value":11524.48,"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":"F3","text":"Represents 75,865 shares of Common Stock and 75,138 Restricted Stock Units."}],"balance_after":151003,"source":{"system":"sec-edgar","filing":"0001209191-19-015593","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919119015593/doc4.xml","form_type":"4"}},{"id":3620180,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2019-03-04T16:20:30.000Z","date":"2019-02-28","kind":"tax_withholding","acquired":false,"shares":7903,"price":3.46,"value":27344.38,"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 67,652 shares of Common Stock and 86,625 Restricted Stock Units."}],"balance_after":154277,"source":{"system":"sec-edgar","filing":"0001209191-19-015593","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919119015593/doc4.xml","form_type":"4"}},{"id":3624185,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Stock Options (Right to Buy)","published_at":"2019-03-01T19:47:02.000Z","date":"2019-02-27","kind":"grant","acquired":true,"shares":83182,"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":83182,"derivative":{"exercise_price":3.63,"expiration_date":"2029-02-27","underlying":"Common Stock","underlying_shares":83182},"source":{"system":"sec-edgar","filing":"0001209191-19-015238","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919119015238/doc4.xml","form_type":"4"}},{"id":3624184,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2019-03-01T19:47:02.000Z","date":"2019-02-27","kind":"grant","acquired":true,"shares":41322,"price":3.63,"value":149998.86,"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 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 52,609 shares of Common Stock and 109,571 Restricted Stock Units."}],"balance_after":162180,"source":{"system":"sec-edgar","filing":"0001209191-19-015238","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919119015238/doc4.xml","form_type":"4"}},{"id":3819952,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2018-09-11T17:41:31.000Z","date":"2018-09-10","kind":"tax_withholding","acquired":false,"shares":1832,"price":4.84,"value":8866.88,"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 52,609 shares of Common Stock and 68,249 restricted stock units."}],"balance_after":120858,"source":{"system":"sec-edgar","filing":"0001209191-18-050544","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919118050544/doc4.xml","form_type":"4"}},{"id":3996842,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2018-03-14T10:21:13.000Z","date":"2018-03-11","kind":"tax_withholding","acquired":false,"shares":1628,"price":4.59,"value":7472.52,"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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 48,221 shares of common stock and 74,469 restricted stock units."}],"balance_after":122690,"source":{"system":"sec-edgar","filing":"0001209191-18-019489","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919118019489/doc4.xml","form_type":"4"}},{"id":4021294,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Stock Options (Right to Buy)","published_at":"2018-03-02T18:31:13.000Z","date":"2018-02-28","kind":"grant","acquired":true,"shares":67321,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","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":67321,"derivative":{"exercise_price":4.6,"expiration_date":"2028-02-28","underlying":"Common Stock","underlying_shares":67321},"source":{"system":"sec-edgar","filing":"0001209191-18-015984","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919118015984/doc4.xml","form_type":"4"}},{"id":4021293,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2018-03-02T18:31:13.000Z","date":"2018-03-01","kind":"tax_withholding","acquired":false,"shares":3497,"price":4.57,"value":15981.29,"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 time-based restricted stock units."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"Represents 44,323 shares of common stock and 79,995 restricted stock units."}],"balance_after":124318,"source":{"system":"sec-edgar","filing":"0001209191-18-015984","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919118015984/doc4.xml","form_type":"4"}},{"id":4021292,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2018-03-02T18:31:13.000Z","date":"2018-02-28","kind":"tax_withholding","acquired":false,"shares":4197,"price":4.6,"value":19306.2,"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 time-based restricted stock units."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Represents 36,333 shares of common stock and 91,482 restricted stock units."}],"balance_after":127815,"source":{"system":"sec-edgar","filing":"0001209191-18-015984","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919118015984/doc4.xml","form_type":"4"}},{"id":4021291,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2018-03-02T18:31:13.000Z","date":"2018-02-28","kind":"grant","acquired":true,"shares":32608,"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 28,453 shares of common stock and 103,559 restricted stock units."}],"balance_after":132012,"source":{"system":"sec-edgar","filing":"0001209191-18-015984","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919118015984/doc4.xml","form_type":"4"}},{"id":4211970,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2017-09-12T16:29:57.000Z","date":"2017-09-10","kind":"tax_withholding","acquired":false,"shares":2019,"price":4.18,"value":8439.42,"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 time-based restricted stock units."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 28,453 shares of Common Stock and 70,951 restricted stock units."}],"balance_after":99404,"source":{"system":"sec-edgar","filing":"0001209191-17-052431","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919117052431/doc4.xml","form_type":"4"}},{"id":4389383,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2017-03-13T20:11:39.000Z","date":"2017-03-11","kind":"tax_withholding","acquired":false,"shares":2087,"price":4.07,"value":8494.09,"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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 24,253 shares of Common Stock and 77,170 restricted stock units."}],"balance_after":101423,"source":{"system":"sec-edgar","filing":"0001209191-17-020353","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919117020353/doc4.xml","form_type":"4"}},{"id":4410825,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Stock Options (right to buy)","published_at":"2017-03-02T19:39:42.000Z","date":"2017-02-28","kind":"grant","acquired":true,"shares":71238,"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 28, 2018, an additional one-third of the shares on February 28, 2019 and the remaining one-third of the shares on February 28, 2020."}],"balance_after":71238,"derivative":{"exercise_price":4.14,"expiration_date":"2027-02-28","underlying":"Common Stock","underlying_shares":71238},"source":{"system":"sec-edgar","filing":"0001209191-17-016985","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919117016985/doc4.xml","form_type":"4"}},{"id":4410824,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2017-03-02T19:39:42.000Z","date":"2017-03-01","kind":"tax_withholding","acquired":false,"shares":4337,"price":4.18,"value":18128.66,"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 time-based RSUs."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Represents 20,814 shares of Common Stock and 82,696 RSUs"}],"balance_after":103510,"source":{"system":"sec-edgar","filing":"0001209191-17-016985","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919117016985/doc4.xml","form_type":"4"}},{"id":4410823,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2017-03-02T19:39:42.000Z","date":"2017-02-28","kind":"grant","acquired":true,"shares":36231,"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, 2018, an additional one-third of the shares on February 28, 2019, and the remaining one-third of the shares on February 28, 2020."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Represents 13,664 shares of Common Stock and 94,183 RSUs"}],"balance_after":107847,"source":{"system":"sec-edgar","filing":"0001209191-17-016985","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919117016985/doc4.xml","form_type":"4"}},{"id":4604706,"issuer":{"id":5645,"kind":"organization","name":"ASPEN AEROGELS INC","symbol":"ASPN"},"owners":[{"id":129824,"kind":"person","name":"FAIRBANKS JOHN F","position":1,"cik":"0001094147","reported_name":"FAIRBANKS JOHN F","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"VP, CFO and Treasurer"}}],"security":"Common Stock","published_at":"2016-09-13T20:05:18.000Z","date":"2016-09-10","kind":"tax_withholding","acquired":false,"shares":2019,"price":4.7,"value":9489.3,"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 13,664 shares of Common Stock and 57,952 RSUs."}],"balance_after":71616,"source":{"system":"sec-edgar","filing":"0001209191-16-141306","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1094147/000120919116141306/doc4.xml","form_type":"4"}}]}