{"cik":"0001666572","entityType":"other","sic":"","sicDescription":"","ownerOrg":null,"insiderTransactionForOwnerExists":0,"insiderTransactionForIssuerExists":0,"name":"FirstMark Capital I GP, LLC","tickers":[],"exchanges":[],"ein":"134298112","lei":null,"description":"","website":"","investorWebsite":"","category":"","fiscalYearEnd":"1231","stateOfIncorporation":"DE","stateOfIncorporationDescription":"DE","addresses":{"mailing":{"street1":"100 5TH AVENUE, 3RD FLOOR","street2":null,"city":"NEW YORK","stateOrCountry":"NY","zipCode":"10011","stateOrCountryDescription":"NY","isForeignLocation":null,"foreignStateTerritory":null,"country":null,"countryCode":null},"business":{"street1":"100 5TH AVENUE, 3RD FLOOR","street2":null,"city":"NEW YORK","stateOrCountry":"NY","zipCode":"10011","stateOrCountryDescription":"NY","isForeignLocation":null,"foreignStateTerritory":null,"country":null,"countryCode":null}},"phone":"212-792-2200","flags":"","formerNames":[],"filings":{"recent":{"accessionNumber":["0001104659-21-137914","0001104659-21-104994","0001104659-21-068233","0001104659-21-021868","0001104659-20-118832","0001104659-20-095363","0001104659-20-060099","0001104659-20-019285","0001144204-17-055781","0001144204-17-038787","0001144204-17-025107","0001144204-17-004294","0001144204-16-131359","0001144204-16-116577","0001144204-16-101559","0001144204-16-081232"],"filingDate":["2021-11-12","2021-08-13","2021-05-17","2021-02-12","2020-10-28","2020-08-14","2020-05-12","2020-02-12","2017-11-02","2017-07-28","2017-05-08","2017-01-27","2016-11-03","2016-08-04","2016-05-13","2016-02-12"],"reportDate":["2021-09-30","2021-06-30","2021-03-31","2020-12-31","2020-09-30","2020-06-30","2020-03-31","2019-12-31","2017-09-30","2017-06-30","2017-03-31","2016-12-31","2016-09-30","2016-06-30","2016-03-31","2015-12-31"],"acceptanceDateTime":["2021-11-12T19:14:27.000Z","2021-08-13T19:00:16.000Z","2021-05-17T20:58:52.000Z","2021-02-12T21:00:06.000Z","2020-10-28T17:09:14.000Z","2020-08-14T17:44:07.000Z","2020-05-12T19:01:19.000Z","2020-02-12T21:27:24.000Z","2017-11-02T18:59:47.000Z","2017-07-27T22:02:48.000Z","2017-05-08T17:02:14.000Z","2017-01-27T21:04:41.000Z","2016-11-03T19:34:03.000Z","2016-08-04T19:26:36.000Z","2016-05-13T15:39:25.000Z","2016-02-12T16:55:14.000Z"],"act":["34","34","34","34","34","34","34","34","34","34","34","34","34","34","34","34"],"form":["13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR"],"fileNumber":["028-17198","028-17198","028-17198","028-17198","028-17198","028-17198","028-17198","028-17198","028-17198","028-17198","028-17198","028-17198","028-17198","028-17198","028-17198","028-17198"],"filmNumber":["211402552","211171652","21931920","21626949","201267397","201103774","20868700","20604538","171171848","17987314","17821455","17553741","161971387","161807091","161646824","161416545"],"items":["","","","","","","","","","","","","","","",""],"core_type":["13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR","13F-HR"],"size":[3937,3937,3041,3041,3042,3987,3984,3984,3936,3935,3935,3935,3928,3970,3970,3972],"isXBRL":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"isInlineXBRL":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"isXBRLNumeric":[null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null],"primaryDocument":["xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml","xslForm13F_X01/primary_doc.xml"],"primaryDocDescription":["","","","","","","","","","","","","","","",""]},"files":[]}}