{"cik":"0001609492","entityType":"other","sic":"","sicDescription":"","ownerOrg":"","insiderTransactionForOwnerExists":1,"insiderTransactionForIssuerExists":0,"name":"MPM BioVentures 2014, L.P.","tickers":[],"exchanges":[],"ein":"000000000","lei":null,"description":"","website":"","investorWebsite":"","category":"","fiscalYearEnd":"1231","stateOfIncorporation":"DE","stateOfIncorporationDescription":"DE","addresses":{"mailing":{"street1":"C/O MPM BIOIMPACT","street2":"399 BOYLSTON STREET, SUITE 1100","city":"BOSTON","stateOrCountry":"MA","zipCode":"02116","stateOrCountryDescription":"MA","isForeignLocation":0,"foreignStateTerritory":null,"country":null,"countryCode":null},"business":{"street1":"C/O MPM BIOIMPACT","street2":"399 BOYLSTON STREET, SUITE 1100","city":"BOSTON","stateOrCountry":"MA","zipCode":"02116","stateOrCountryDescription":"MA","isForeignLocation":null,"foreignStateTerritory":null,"country":null,"countryCode":null}},"phone":"(617) 425-9200","flags":"","formerNames":[],"filings":{"recent":{"accessionNumber":["0001231919-26-001160","0001231919-26-001155","0001231919-26-001143","0001231919-26-001135","0001231919-26-001107","0001628280-26-047360","0001628280-26-046082","0001628280-26-038896","0001628280-26-036038","0001609492-26-000006","0001628280-26-033575","0001609492-26-000004","0001628280-26-029390","0001628280-26-028435","0001628280-26-027595","0001609492-26-000002","0001628280-26-000949","0001231919-25-000666","0001628280-25-059016","0001628280-25-058570","0001628280-25-056348","0001231919-25-000575","0001231919-25-000570","0001628280-25-055070","0001231919-25-000565","0001231919-25-000551","0001628280-25-053820","0001231919-25-000534","0001231919-25-000511","0001231919-25-000509","0001628280-25-052647","0001231919-25-000461","0001628280-25-051127","0001231919-25-000441","0001231919-25-000422","0001628280-25-048926","0001231919-25-000406","0001628280-25-047583","0001231919-25-000374","0001628280-25-046469","0001415889-25-013248","0001415889-25-013244","0001415889-25-011574","0001415889-25-002471","0001415889-25-001509","0001415889-25-000798","0001415889-24-030162","0001415889-24-029141","0001193125-24-032037","0001209191-23-034340","0001209191-22-002168","0001193125-21-353003","0001209191-21-068408","0001209191-21-067706","0001209191-21-067148","0001209191-21-066852","0001193125-21-328063","0001209191-21-062982","0001209191-21-061990","0001193125-21-301972","0001209191-21-060723","0001209191-21-060490","0001209191-21-060236","0001209191-21-059426","0001209191-21-058209","0001209191-21-057823","0001209191-21-057414","0001193125-21-278351","0001209191-21-056950","0001209191-21-056415","0001209191-21-055743","0001209191-21-055210","0001193125-21-219777","0001193125-21-172306","0001193125-21-162185","0001209191-21-030626","0001193125-21-152396","0001209191-21-029045","0001209191-21-026881","0001209191-21-026437","0001209191-21-026429","0001209191-21-026213","0001193125-21-089825","0001193125-21-043555","0001209191-21-010209","0001209191-21-008935","0001209191-21-007900","0001209191-21-005787","0001209191-21-004983","0001193125-20-273644","0001209191-20-054324","0001209191-20-052759","0001193125-20-213216","0000899243-20-020691","0000899243-20-020683","0000899243-20-020272","0000899243-20-020253","0001193125-20-187831","0001209191-20-038917","0001209191-20-037738","0001193125-19-062378","0001193125-19-048021","0001209191-19-012243","0001209191-19-010312","0001209191-19-009857","0001209191-19-008265","0001609492-15-000003","0001609492-15-000002","0001609492-14-000002"],"filingDate":["2026-09-10","2026-09-09","2026-09-03","2026-08-31","2026-08-26","2026-07-06","2026-06-29","2026-05-28","2026-05-18","2026-05-12","2026-05-11","2026-05-05","2026-05-01","2026-04-29","2026-04-27","2026-01-16","2026-01-06","2025-12-29","2025-12-29","2025-12-22","2025-12-10","2025-12-04","2025-12-03","2025-12-03","2025-12-01","2025-11-25","2025-11-24","2025-11-20","2025-11-17","2025-11-17","2025-11-17","2025-11-12","2025-11-10","2025-11-06","2025-11-04","2025-11-04","2025-11-03","2025-10-30","2025-10-29","2025-10-27","2025-05-15","2025-05-15","2025-04-30","2025-01-31","2025-01-15","2025-01-06","2024-12-26","2024-12-12","2024-02-12","2023-06-05","2022-01-06","2021-12-10","2021-12-07","2021-12-02","2021-11-30","2021-11-24","2021-11-12","2021-11-04","2021-10-28","2021-10-19","2021-10-18","2021-10-14","2021-10-12","2021-10-05","2021-09-30","2021-09-27","2021-09-23","2021-09-21","2021-09-20","2021-09-16","2021-09-13","2021-09-08","2021-07-21","2021-05-25","2021-05-14","2021-05-06","2021-05-06","2021-04-29","2021-04-15","2021-04-13","2021-04-13","2021-04-09","2021-03-23","2021-02-16","2021-02-12","2021-02-09","2021-02-04","2021-01-27","2021-01-22","2020-10-21","2020-10-08","2020-10-01","2020-08-07","2020-07-29","2020-07-29","2020-07-23","2020-07-23","2020-07-06","2020-06-25","2020-06-18","2019-03-04","2019-02-22","2019-02-21","2019-02-14","2019-02-13","2019-02-07","2015-07-09","2015-05-22","2014-05-29"],"reportDate":["","2026-09-04","2026-09-01","2026-08-27","2026-08-24","","","","","","","","","","","","","","","","","2025-12-02","","","2025-11-26","2025-11-21","","2025-11-18","","2025-11-13","","2025-11-07","","2025-11-04","","","2025-10-30","","2025-10-27","","2025-05-13","","2025-03-27","","","","","2024-12-10","","2023-06-01","2022-01-04","","2021-12-03","2021-11-30","2021-11-26","2021-11-17","","2021-11-02","2021-10-28","","2021-10-15","2021-10-12","2021-10-07","2021-10-01","2021-09-28","2021-09-23","2021-09-21","","2021-09-16","2021-09-14","2021-09-09","2021-09-07","","","","2021-05-04","","2021-04-29","2021-04-15","2021-04-09","2021-04-09","2021-04-07","","","2021-02-10","2021-02-05","2021-02-02","2021-01-25","2021-01-20","","2020-10-06","2020-10-01","","2020-07-28","2020-07-28","2020-07-23","2020-07-23","","2020-06-23","2020-06-18","","","2019-02-19","2019-02-12","2019-02-13","2019-02-07","","",""],"acceptanceDateTime":["2026-09-10T20:26:57.000Z","2026-09-09T23:23:33.000Z","2026-09-03T23:21:03.000Z","2026-08-31T22:25:04.000Z","2026-08-27T01:28:15.000Z","2026-07-06T21:18:20.000Z","2026-06-29T21:29:06.000Z","2026-05-28T21:04:18.000Z","2026-05-18T21:02:53.000Z","2026-05-12T23:56:22.000Z","2026-05-11T20:32:53.000Z","2026-05-05T23:04:02.000Z","2026-05-01T20:51:39.000Z","2026-04-29T20:47:30.000Z","2026-04-27T21:00:06.000Z","2026-01-16T22:36:28.000Z","2026-01-06T21:54:58.000Z","2025-12-29T23:59:21.000Z","2025-12-29T21:46:32.000Z","2025-12-22T21:57:32.000Z","2025-12-10T22:02:13.000Z","2025-12-04T23:19:45.000Z","2025-12-04T00:04:17.000Z","2025-12-03T21:38:42.000Z","2025-12-01T23:12:45.000Z","2025-11-25T23:04:42.000Z","2025-11-24T21:31:55.000Z","2025-11-20T22:51:31.000Z","2025-11-18T01:00:40.000Z","2025-11-18T00:22:09.000Z","2025-11-17T21:56:05.000Z","2025-11-13T00:32:59.000Z","2025-11-10T21:53:03.000Z","2025-11-07T00:41:49.000Z","2025-11-04T23:33:09.000Z","2025-11-04T21:46:42.000Z","2025-11-04T00:08:19.000Z","2025-10-30T21:08:27.000Z","2025-10-29T23:21:58.000Z","2025-10-27T20:58:36.000Z","2025-05-15T21:32:22.000Z","2025-05-15T21:30:55.000Z","2025-04-30T20:17:02.000Z","2025-01-31T21:15:30.000Z","2025-01-15T23:43:01.000Z","2025-01-06T21:49:09.000Z","2024-12-26T21:34:56.000Z","2024-12-12T22:00:18.000Z","2024-02-12T21:09:31.000Z","2023-06-05T20:36:19.000Z","2022-01-06T21:12:58.000Z","2021-12-10T01:23:00.000Z","2021-12-07T23:35:57.000Z","2021-12-02T23:53:51.000Z","2021-11-30T21:53:46.000Z","2021-11-24T23:34:41.000Z","2021-11-12T21:07:06.000Z","2021-11-04T21:37:19.000Z","2021-10-29T00:45:49.000Z","2021-10-19T20:06:55.000Z","2021-10-18T20:34:38.000Z","2021-10-14T21:27:33.000Z","2021-10-12T20:34:14.000Z","2021-10-05T20:32:38.000Z","2021-09-30T21:06:05.000Z","2021-09-27T21:51:41.000Z","2021-09-23T20:19:14.000Z","2021-09-21T20:32:02.000Z","2021-09-20T22:38:20.000Z","2021-09-16T20:48:56.000Z","2021-09-13T23:01:14.000Z","2021-09-08T23:13:11.000Z","2021-07-20T21:36:53.000Z","2021-05-25T20:06:44.000Z","2021-05-14T21:18:40.000Z","2021-05-06T20:20:40.000Z","2021-05-06T10:15:52.000Z","2021-04-29T21:31:55.000Z","2021-04-16T00:01:16.000Z","2021-04-13T20:16:42.000Z","2021-04-13T20:12:06.000Z","2021-04-09T20:10:19.000Z","2021-03-22T21:49:29.000Z","2021-02-16T13:30:59.000Z","2021-02-12T22:03:24.000Z","2021-02-09T23:14:02.000Z","2021-02-05T00:30:05.000Z","2021-01-28T01:35:22.000Z","2021-01-23T01:16:40.000Z","2020-10-21T20:05:59.000Z","2020-10-08T22:31:30.000Z","2020-10-01T23:15:03.000Z","2020-08-07T21:42:05.000Z","2020-07-30T01:45:41.000Z","2020-07-30T01:18:46.000Z","2020-07-23T23:29:12.000Z","2020-07-23T23:21:52.000Z","2020-07-06T20:06:59.000Z","2020-06-25T20:31:57.000Z","2020-06-19T01:26:42.000Z","2019-03-04T20:42:33.000Z","2019-02-22T17:59:32.000Z","2019-02-21T23:05:08.000Z","2019-02-14T22:32:09.000Z","2019-02-13T23:36:37.000Z","2019-02-07T23:59:46.000Z","2015-07-09T20:59:32.000Z","2015-05-22T18:28:24.000Z","2014-05-29T21:02:02.000Z"],"act":["","34","34","34","34","","","","","","","","","","","","","","","","","34","","","34","34","","34","","34","","34","","34","","","34","","34","","34","","34","","","","","34","","34","34","","34","34","34","34","","34","34","","34","34","34","34","34","34","34","","34","34","34","34","","","","34","","34","34","34","34","34","","","34","34","34","34","34","","34","34","","34","34","34","34","","34","34","","","34","34","34","34","33","33","33"],"form":["SCHEDULE 13D/A","4","4","4","4","144","144","144","144","SCHEDULE 13D/A","144","SCHEDULE 13D/A","144","144","144","SCHEDULE 13D/A","144","SCHEDULE 13D/A","144","144","144","4","SCHEDULE 13D/A","144","4","4","144","4","SCHEDULE 13D/A","4","144","4","144","4","SCHEDULE 13D/A","144","4","144","4","144","4","SCHEDULE 13D/A","4","SCHEDULE 13D/A","SCHEDULE 13D/A","SCHEDULE 13D/A","SCHEDULE 13D/A","4","SC 13D/A","4","4","SC 13D/A","4","4","4","4","SC 13D","4","3","SC 13D/A","4","4","4","4","4","4","4","SC 13D/A","4","4","4","4","SC 13D/A","SC 13D/A","SC 13D","4","SC 13D/A","3","4","4","4","4","SC 13D/A","SC 13D/A","4","4","4","4","4","SC 13D","4","3","SC 13D","4","4","3","3","SC 13D","4","3","SC 13D","SC 13D","4","4","3","3","D/A","D/A","D"],"fileNumber":["","001-40969","001-40969","001-40969","001-40969","","","","","","","","","","","","","","","","","001-40366","","","001-40366","001-40366","","001-40366","","001-40366","","001-40366","","001-40366","","","001-40366","","001-40366","","001-39401","","001-40366","","","","","001-40969","","001-38811","001-39401","","001-39401","001-39401","001-39401","001-39401","","001-40969","001-40969","","001-39401","001-39401","001-39401","001-39401","001-39401","001-39401","001-39401","","001-39401","001-39401","001-39401","001-39401","","","","001-40366","","001-40366","001-38800","001-39401","001-38800","001-39401","","","001-38800","001-38800","001-38800","001-38800","001-38800","","001-39575","001-39575","","001-39401","001-39401","001-39401","001-39401","","001-39335","001-39335","","","001-38811","001-38800","001-38811","001-38800","021-218237","021-218237","021-218237"],"filmNumber":["","261369329","261359763","261348050","261324791","","","","","","","","","","","","","","","","","251550866","","","251541066","251522996","","251504139","","251492466","","251474906","","251460071","","","251445807","","251431643","","25956062","","25895583","","","","","241545706","","23993087","22514958","","211477181","211468237","211460210","211448498","","211381340","211360183","","211328602","211324095","211318953","211307144","211295711","211283008","211272744","","211264389","211258452","211250817","211243225","","","","21898124","","21872354","21829819","21823280","21823204","21817947","","","21629180","21608278","21592799","21561666","21547563","","201231756","201217608","","201058920","201058863","201044810","201044778","","20989639","20974069","","","19623269","19608636","19599690","19576848","15981944","15886049","14876837"],"items":["","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","06b,3C,3C.1,3C.7","06b,3C,3C.1,3C.7","06b,3C,3C.1,3C.7"],"core_type":["SCHEDULE 13D/A","4","4","4","4","144","144","144","144","SCHEDULE 13D/A","144","SCHEDULE 13D/A","144","144","144","SCHEDULE 13D/A","144","SCHEDULE 13D/A","144","144","144","4","SCHEDULE 13D/A","144","4","4","144","4","SCHEDULE 13D/A","4","144","4","144","4","SCHEDULE 13D/A","144","4","144","4","144","4","SCHEDULE 13D/A","4","SCHEDULE 13D/A","SCHEDULE 13D/A","SCHEDULE 13D/A","SCHEDULE 13D/A","4","SC 13D/A","4","4","SC 13D/A","4","4","4","4","SC 13D","4","3","SC 13D/A","4","4","4","4","4","4","4","SC 13D/A","4","4","4","4","SC 13D/A","SC 13D/A","SC 13D","4","SC 13D/A","3","4","4","4","4","SC 13D/A","SC 13D/A","4","4","4","4","4","SC 13D","4","3","SC 13D","4","4","3","3","SC 13D","4","3","SC 13D","SC 13D","4","4","3","3","D/A","D/A","D"],"size":[111821,28267,28210,28205,28204,371106,368520,351125,338937,40023,333497,40250,321304,317708,5031,40885,350073,41405,336712,327466,312019,19983,40780,298792,19839,19846,287756,19851,56884,19848,277286,22419,267800,19901,64308,44925,19904,255707,19900,4676,21273,61524,21465,33982,33854,33802,38337,24734,257283,18945,30947,424479,41327,36786,28344,39309,328280,29159,20678,417281,25585,25596,25586,22805,22803,28374,22789,400738,28334,28321,28329,27909,327338,283296,370302,23438,332163,19143,28419,19437,25659,33423,268987,300217,20430,26197,26202,25729,36514,405456,25483,19685,424966,81239,92857,25871,37489,297802,22865,14963,372806,307634,26283,47330,21991,27039,17794,16973,17747],"isXBRL":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"isInlineXBRL":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],"isXBRLNumeric":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null,null],"primaryDocument":["xslSCHEDULE_13D_X02/primary_doc.xml","xslF345X06/form4-09092026_110922.xml","xslF345X06/form4-09032026_110951.xml","xslF345X06/form4-08312026_100852.xml","xslF345X06/form4-08272026_010802.xml","xsl144X01/primary_doc.xml","xsl144X01/primary_doc.xml","xsl144X01/primary_doc.xml","xsl144X01/primary_doc.xml","xslSCHEDULE_13D_X02/primary_doc.xml","xsl144X01/primary_doc.xml","xslSCHEDULE_13D_X02/primary_doc.xml","xsl144X01/primary_doc.xml","xsl144X01/primary_doc.xml","xsl144X01/primary_doc.xml","xslSCHEDULE_13D_X01/primary_doc.xml","xsl144X01/primary_doc.xml","xslSCHEDULE_13D_X01/primary_doc.xml","xsl144X01/primary_doc.xml","xsl144X01/primary_doc.xml","xsl144X01/primary_doc.xml","xslF345X05/form4-12042025_111239.xml","xslSCHEDULE_13D_X01/primary_doc.xml","xsl144X01/primary_doc.xml","xslF345X05/form4-12012025_111237.xml","xslF345X05/form4-11252025_111135.xml","xsl144X01/primary_doc.xml","xslF345X05/form4-11202025_101124.xml","xslSCHEDULE_13D_X01/primary_doc.xml","xslF345X05/form4-11182025_121101.xml","xsl144X01/primary_doc.xml","xslF345X05/form4-11132025_121151.xml","xsl144X01/primary_doc.xml","xslF345X05/form4-11072025_121141.xml","xslSCHEDULE_13D_X01/primary_doc.xml","xsl144X01/primary_doc.xml","xslF345X05/form4-11042025_121111.xml","xsl144X01/primary_doc.xml","xslF345X05/form4-10292025_111051.xml","xsl144X01/primary_doc.xml","xslF345X05/form4-05152025_090517.xml","xslSCHEDULE_13D_X01/primary_doc.xml","xslF345X05/form4-04302025_080449.xml","xslSCHEDULE_13D_X01/primary_doc.xml","xslSCHEDULE_13D_X01/primary_doc.xml","xslSCHEDULE_13D_X01/primary_doc.xml","xslSCHEDULE_13D_X01/primary_doc.xml","xslF345X05/form4-12122024_051201.xml","d777936dsc13da.htm","xslF345X04/doc4.xml","xslF345X03/doc4.xml","d251372dsc13da.htm","xslF345X03/doc4.xml","xslF345X03/doc4.xml","xslF345X03/doc4.xml","xslF345X03/doc4.xml","d255955dsc13d.htm","xslF345X03/doc4.xml","xslF345X02/doc3.xml","d215856dsc13da.htm","xslF345X03/doc4.xml","xslF345X03/doc4.xml","xslF345X03/doc4.xml","xslF345X03/doc4.xml","xslF345X03/doc4.xml","xslF345X03/doc4.xml","xslF345X03/doc4.xml","d212808dsc13da.htm","xslF345X03/doc4.xml","xslF345X03/doc4.xml","xslF345X03/doc4.xml","xslF345X03/doc4.xml","d165435dsc13da.htm","d189567dsc13da.htm","d575928dsc13d.htm","xslF345X03/doc4.xml","d905343dsc13da.htm","xslF345X02/doc3.xml","xslF345X03/doc4.xml","xslF345X03/doc4.xml","xslF345X03/doc4.xml","xslF345X03/doc4.xml","d129930dsc13da.htm","d133401dsc13da.htm","xslF345X03/doc4.xml","xslF345X03/doc4.xml","xslF345X03/doc4.xml","xslF345X03/doc4.xml","xslF345X03/doc4.xml","d19667dsc13d.htm","xslF345X03/doc4.xml","xslF345X02/doc3.xml","d157350dsc13d.htm","xslF345X03/doc4.xml","xslF345X03/doc4.xml","xslF345X02/doc3.xml","xslF345X02/doc3.xml","d949143dsc13d.htm","xslF345X03/doc4.xml","xslF345X02/doc3.xml","d717494dsc13d.htm","d701636dsc13d.htm","xslF345X03/doc4.xml","xslF345X03/doc4.xml","xslF345X02/doc3.xml","xslF345X02/doc3.xml","xslFormDX01/primary_doc.xml","xslFormDX01/primary_doc.xml","xslFormDX01/primary_doc.xml"],"primaryDocDescription":["","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","SC 13D/A","FORM 4 SUBMISSION","FORM 4 SUBMISSION","SC 13D/A","FORM 4 SUBMISSION","FORM 4 SUBMISSION","FORM 4 SUBMISSION","FORM 4 SUBMISSION","SC 13D","FORM 4 SUBMISSION","FORM 3 SUBMISSION","SC 13D/A","FORM 4 SUBMISSION","FORM 4 SUBMISSION","FORM 4 SUBMISSION","FORM 4 SUBMISSION","FORM 4 SUBMISSION","FORM 4 SUBMISSION","FORM 4 SUBMISSION","SC 13D/A","FORM 4 SUBMISSION","FORM 4 SUBMISSION","FORM 4 SUBMISSION","FORM 4 SUBMISSION","SC 13D/A","SC 13D/A","SC 13D","FORM 4 SUBMISSION","SC 13D/A","FORM 3 SUBMISSION","FORM 4 SUBMISSION","FORM 4 SUBMISSION","FORM 4 SUBMISSION","FORM 4 SUBMISSION","SC 13D/A","SC 13D/A","FORM 4 SUBMISSION","FORM 4 SUBMISSION","FORM 4 SUBMISSION","FORM 4 SUBMISSION","FORM 4 SUBMISSION","SC 13D","FORM 4 SUBMISSION","FORM 3 SUBMISSION","SC 13D","FORM 4 SUBMISSION","FORM 4 SUBMISSION","FORM 3 SUBMISSION","FORM 3 SUBMISSION","SC 13D","FORM 4 SUBMISSION","FORM 3 SUBMISSION","SC 13D","SC 13D","FORM 4 SUBMISSION","FORM 4 SUBMISSION","FORM 3 SUBMISSION","FORM 3 SUBMISSION","","",""]},"files":[]}}