Company · CIK 1527599 # SYNLOGIC, INC. | CIK | [1527599](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001527599) (SEC EDGAR) | | --- | --- | | Industry (SIC) | 2834 — Pharmaceutical Preparations | | Incorporated in | DE | | Business address | MA | | Listed | SYBX (OTC) | | First annual or quarterly report | 2015-11-13 | ## Offerings 7 registrations | Registration | Label and status | First filed | Last event | Filings | | --- | --- | --- | --- | --- | | 333-289415 | Shelf Effective | 2025-08-08 | 2025-08-20 | 2 | | 333-274421 | Registered company Final prospectus | 2023-09-08 | 2023-10-02 | 5 | | 333-258151 | Shelf Effective | 2021-07-23 | 2023-04-04 | 5 | | 333-226730 | Shelf Effective | 2018-08-09 | 2021-04-19 | 6 | | 333-233139 | Shelf Effective | 2019-08-08 | 2019-09-13 | 2 | | 333-220948 | Shelf Effective | 2017-10-13 | 2018-04-06 | 5 | | 333-206544 | IPO Final prospectus | 2015-08-24 | 2015-10-01 | 8 | ## Filings 35 | Filed | Filing | Registration | Accession | | --- | --- | --- | --- | | 2025-08-20 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1527599/999999999525002691/9999999995-25-002691-index.htm) Declared effective | 333-289415 | 9999999995-25-002691 | | 2025-08-08 | [S-3](https://www.sec.gov/Archives/edgar/data/1527599/000119312525176972/0001193125-25-176972-index.htm) Shelf registered | 333-289415 | 0001193125-25-176972 | | 2023-10-02 | [424B4](https://www.sec.gov/Archives/edgar/data/1527599/000119312523249173/0001193125-23-249173-index.htm) Final prospectus | 333-274421 | 0001193125-23-249173 | | 2023-09-28 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1527599/999999999523002818/9999999995-23-002818-index.htm) Declared effective | 333-274421 | 9999999995-23-002818 | | 2023-09-28 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1527599/000119312523244819/0001193125-23-244819-index.htm) Amendment | 333-274421 | 0001193125-23-244819 | | 2023-09-27 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1527599/000119312523242769/0001193125-23-242769-index.htm) Amendment | 333-274421 | 0001193125-23-242769 | | 2023-09-08 | [S-1](https://www.sec.gov/Archives/edgar/data/1527599/000119312523231524/0001193125-23-231524-index.htm) Registration filed | 333-274421 | 0001193125-23-231524 | | 2023-04-04 | [424B5](https://www.sec.gov/Archives/edgar/data/1527599/000119312523090871/0001193125-23-090871-index.htm) Shelf takedown | 333-258151 | 0001193125-23-090871 | | 2021-09-23 | [424B5](https://www.sec.gov/Archives/edgar/data/1527599/000119312521280703/0001193125-21-280703-index.htm) Shelf takedown | 333-258151 | 0001193125-21-280703 | | 2021-09-22 | [424B5](https://www.sec.gov/Archives/edgar/data/1527599/000119312521279387/0001193125-21-279387-index.htm) Shelf takedown | 333-258151 | 0001193125-21-279387 | | 2021-07-30 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1527599/999999999521003011/9999999995-21-003011-index.htm) Declared effective | 333-258151 | 9999999995-21-003011 | | 2021-07-23 | [S-3](https://www.sec.gov/Archives/edgar/data/1527599/000119312521223153/0001193125-21-223153-index.htm) Shelf registered | 333-258151 | 0001193125-21-223153 | | 2021-04-19 | [424B5](https://www.sec.gov/Archives/edgar/data/1527599/000119312521121228/0001193125-21-121228-index.htm) Shelf takedown | 333-226730 | 0001193125-21-121228 | | 2021-04-15 | [424B5](https://www.sec.gov/Archives/edgar/data/1527599/000119312521117780/0001193125-21-117780-index.htm) Shelf takedown | 333-226730 | 0001193125-21-117780 | | 2021-02-10 | [424B5](https://www.sec.gov/Archives/edgar/data/1527599/000119312521036277/0001193125-21-036277-index.htm) Shelf takedown | 333-226730 | 0001193125-21-036277 | | 2020-03-18 | [424B5](https://www.sec.gov/Archives/edgar/data/1527599/000119312520077215/0001193125-20-077215-index.htm) Shelf takedown | 333-226730 | 0001193125-20-077215 | | 2019-09-13 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1527599/999999999519002090/9999999995-19-002090-index.htm) Declared effective | 333-233139 | 9999999995-19-002090 | | 2019-08-08 | [S-3](https://www.sec.gov/Archives/edgar/data/1527599/000119312519216936/0001193125-19-216936-index.htm) Shelf registered | 333-233139 | 0001193125-19-216936 | | 2018-08-30 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1527599/999999999518002248/9999999995-18-002248-index.htm) Declared effective | 333-226730 | 9999999995-18-002248 | | 2018-08-09 | [S-3](https://www.sec.gov/Archives/edgar/data/1527599/000119312518244428/0001193125-18-244428-index.htm) Shelf registered | 333-226730 | 0001193125-18-244428 | | 2018-04-06 | [424B5](https://www.sec.gov/Archives/edgar/data/1527599/000119312518110119/0001193125-18-110119-index.htm) Shelf takedown | 333-220948 | 0001193125-18-110119 | | 2018-01-25 | [424B5](https://www.sec.gov/Archives/edgar/data/1527599/000119312518018556/0001193125-18-018556-index.htm) Shelf takedown | 333-220948 | 0001193125-18-018556 | | 2018-01-23 | [424B5](https://www.sec.gov/Archives/edgar/data/1527599/000119312518017366/0001193125-18-017366-index.htm) Shelf takedown | 333-220948 | 0001193125-18-017366 | | 2017-10-25 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1527599/999999999517002786/9999999995-17-002786-index.htm) Declared effective | 333-220948 | 9999999995-17-002786 | | 2017-10-13 | [S-3](https://www.sec.gov/Archives/edgar/data/1527599/000119312517309912/0001193125-17-309912-index.htm) Shelf registered | 333-220948 | 0001193125-17-309912 | | 2017-07-13 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1527599/999999999517001811/9999999995-17-001811-index.htm) Declared effective | 333-218885 | 9999999995-17-001811 | | 2015-10-01 | [424B4](https://www.sec.gov/Archives/edgar/data/1527599/000104746915007634/0001047469-15-007634-index.htm) Final prospectus | 333-206544 | 0001047469-15-007634 | | 2015-09-30 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1527599/999999999515002634/9999999995-15-002634-index.htm) Declared effective | 333-206544 | 9999999995-15-002634 | | 2015-09-30 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1527599/000104746915007609/0001047469-15-007609-index.htm) Amendment | 333-206544 | 0001047469-15-007609 | | 2015-09-29 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1527599/000104746915007595/0001047469-15-007595-index.htm) Amendment | 333-206544 | 0001047469-15-007595 | | 2015-09-25 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1527599/000104746915007528/0001047469-15-007528-index.htm) Amendment | 333-206544 | 0001047469-15-007528 | | 2015-09-18 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1527599/000104746915007386/0001047469-15-007386-index.htm) Amendment | 333-206544 | 0001047469-15-007386 | | 2015-09-11 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1527599/000104746915007251/0001047469-15-007251-index.htm) Amendment | 333-206544 | 0001047469-15-007251 | | 2015-08-24 | [S-1](https://www.sec.gov/Archives/edgar/data/1527599/000104746915006962/0001047469-15-006962-index.htm) Registration filed | 333-206544 | 0001047469-15-006962 | | 2014-03-12 | [DRS](https://www.sec.gov/Archives/edgar/data/1527599/000091205714000073/0000912057-14-000073-index.htm) Draft made public | 377-00513 | 0000912057-14-000073 | [All filings of this company](https://equitycapital.markets/filings?cik=1527599) · [CSV](https://equitycapital.markets/filings.csv?cik=1527599) --- Source page: https://equitycapital.markets/company/1527599 · Data: U.S. SEC EDGAR · CC BY 4.0