Company · CIK 1533040

# Phio Pharmaceuticals Corp.

| CIK | [1533040](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001533040) (SEC EDGAR) |
| --- | --- |
| Industry (SIC) | 2834 — Pharmaceutical Preparations |
| Incorporated in | DE |
| Business address | PA |
| Listed | PHIO (Nasdaq) |
| First annual or quarterly report | 2012-05-14 |

## Offerings

 27 registrations

| Registration | Label and status | First filed | Last event | Filings |
| --- | --- | --- | --- | --- |
| 333-279557 | Shelf Effective | 2024-05-20 | 2026-04-08 | 8 |
| 333-291667 | Shelf Effective | 2025-11-20 | 2025-12-03 | 2 |
| 333-289621 | Shelf Effective | 2025-08-15 | 2025-08-22 | 2 |
| 333-284381 | Registered company Effective | 2025-01-21 | 2025-01-28 | 2 |
| 333-281052 | Registered company Effective | 2024-07-26 | 2024-08-01 | 2 |
| 333-279511 | Registered company Withdrawn | 2024-05-17 | 2024-05-20 | 2 |
| 333-256100 | Shelf Effective | 2021-05-13 | 2024-05-17 | 5 |
| 333-276146 | Registered company Effective | 2023-12-19 | 2023-12-27 | 2 |
| 333-272526 | Registered company Effective | 2023-06-08 | 2023-06-16 | 2 |
| 333-271521 | Registered company Effective | 2023-04-28 | 2023-05-09 | 2 |
| 333-224031 | Shelf Effective | 2018-03-29 | 2021-02-17 | 8 |
| 333-252588 | Shelf Effective | 2021-01-29 | 2021-02-08 | 2 |
| 333-239779 | Registered company Effective | 2020-07-09 | 2020-07-17 | 2 |
| 333-238204 | Registered company Effective | 2020-05-12 | 2020-06-01 | 3 |
| 333-234032 | Registered company Final prospectus | 2019-10-01 | 2020-02-12 | 5 |
| 333-233584 | Registered company Effective | 2019-08-30 | 2019-10-01 | 3 |
| 333-227173 | Registered company Final prospectus | 2018-08-31 | 2018-10-02 | 5 |
| 333-224799 | Registered company Effective | 2018-05-09 | 2018-05-31 | 2 |
| 333-220062 | Registered company Effective | 2017-08-18 | 2017-08-30 | 2 |
| 333-219300 | Registered company Effective | 2017-07-14 | 2017-08-08 | 3 |
| 333-203389 | Registered company Final prospectus | 2015-04-13 | 2017-06-21 | 6 |
| 333-214199 | Registered company Final prospectus | 2016-10-21 | 2017-05-09 | 8 |
| 333-194956 | Shelf Effective | 2014-04-01 | 2014-12-19 | 3 |
| 333-191236 | Registered company Effective | 2013-09-18 | 2013-09-30 | 2 |
| 333-188539 | Registered company Effective | 2013-05-10 | 2013-08-08 | 3 |
| 333-181534 | Registered company Effective | 2012-05-18 | 2012-07-06 | 2 |
| 333-177498 | First-time registration Effective | 2011-10-25 | 2012-02-14 | 8 |

## Filings

 96

| Filed | Filing | Registration | Accession |
| --- | --- | --- | --- |
| 2026-04-08 | [424B5](https://www.sec.gov/Archives/edgar/data/1533040/000168316826002750/0001683168-26-002750-index.htm) Shelf takedown | 333-279557 | 0001683168-26-002750 |
| 2025-12-03 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999525003514/9999999995-25-003514-index.htm) Declared effective | 333-291667 | 9999999995-25-003514 |
| 2025-11-20 | [S-3](https://www.sec.gov/Archives/edgar/data/1533040/000168316825008586/0001683168-25-008586-index.htm) Shelf registered | 333-291667 | 0001683168-25-008586 |
| 2025-08-22 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999525002730/9999999995-25-002730-index.htm) Declared effective | 333-289621 | 9999999995-25-002730 |
| 2025-08-15 | [S-3](https://www.sec.gov/Archives/edgar/data/1533040/000168316825006179/0001683168-25-006179-index.htm) Shelf registered | 333-289621 | 0001683168-25-006179 |
| 2025-01-28 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999525000224/9999999995-25-000224-index.htm) Declared effective | 333-284381 | 9999999995-25-000224 |
| 2025-01-21 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000168316825000460/0001683168-25-000460-index.htm) Registration filed | 333-284381 | 0001683168-25-000460 |
| 2025-01-17 | [424B5](https://www.sec.gov/Archives/edgar/data/1533040/000168316825000413/0001683168-25-000413-index.htm) Shelf takedown | 333-279557 | 0001683168-25-000413 |
| 2025-01-15 | [424B5](https://www.sec.gov/Archives/edgar/data/1533040/000168316825000356/0001683168-25-000356-index.htm) Shelf takedown | 333-279557 | 0001683168-25-000356 |
| 2025-01-14 | [424B5](https://www.sec.gov/Archives/edgar/data/1533040/000168316825000324/0001683168-25-000324-index.htm) Shelf takedown | 333-279557 | 0001683168-25-000324 |
| 2024-12-23 | [424B5](https://www.sec.gov/Archives/edgar/data/1533040/000168316824008939/0001683168-24-008939-index.htm) Shelf takedown | 333-279557 | 0001683168-24-008939 |
| 2024-12-20 | [424B5](https://www.sec.gov/Archives/edgar/data/1533040/000168316824008867/0001683168-24-008867-index.htm) Shelf takedown | 333-279557 | 0001683168-24-008867 |
| 2024-08-01 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999524002365/9999999995-24-002365-index.htm) Declared effective | 333-281052 | 9999999995-24-002365 |
| 2024-07-26 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000168316824005092/0001683168-24-005092-index.htm) Registration filed | 333-281052 | 0001683168-24-005092 |
| 2024-07-01 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999524002034/9999999995-24-002034-index.htm) Declared effective | 333-279557 | 9999999995-24-002034 |
| 2024-05-20 | [S-3](https://www.sec.gov/Archives/edgar/data/1533040/000168316824003698/0001683168-24-003698-index.htm) Shelf registered | 333-279557 | 0001683168-24-003698 |
| 2024-05-20 | [RW](https://www.sec.gov/Archives/edgar/data/1533040/000168316824003696/0001683168-24-003696-index.htm) Withdrawn | 333-279511 | 0001683168-24-003696 |
| 2024-05-17 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000168316824003624/0001683168-24-003624-index.htm) Registration filed | 333-279511 | 0001683168-24-003624 |
| 2024-05-17 | [424B5](https://www.sec.gov/Archives/edgar/data/1533040/000168316824003600/0001683168-24-003600-index.htm) Shelf takedown | 333-256100 | 0001683168-24-003600 |
| 2023-12-27 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999523003764/9999999995-23-003764-index.htm) Declared effective | 333-276146 | 9999999995-23-003764 |
| 2023-12-19 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000168316823008964/0001683168-23-008964-index.htm) Registration filed | 333-276146 | 0001683168-23-008964 |
| 2023-06-16 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999523001782/9999999995-23-001782-index.htm) Declared effective | 333-272526 | 9999999995-23-001782 |
| 2023-06-08 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000168316823004016/0001683168-23-004016-index.htm) Registration filed | 333-272526 | 0001683168-23-004016 |
| 2023-06-01 | [424B5](https://www.sec.gov/Archives/edgar/data/1533040/000168316823003815/0001683168-23-003815-index.htm) Shelf takedown | 333-256100 | 0001683168-23-003815 |
| 2023-05-09 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999523001352/9999999995-23-001352-index.htm) Declared effective | 333-271521 | 9999999995-23-001352 |
| 2023-04-28 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000168316823002765/0001683168-23-002765-index.htm) Registration filed | 333-271521 | 0001683168-23-002765 |
| 2023-04-19 | [424B5](https://www.sec.gov/Archives/edgar/data/1533040/000168316823002531/0001683168-23-002531-index.htm) Shelf takedown | 333-256100 | 0001683168-23-002531 |
| 2021-05-21 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999521002069/9999999995-21-002069-index.htm) Declared effective | 333-256100 | 9999999995-21-002069 |
| 2021-05-13 | [S-3](https://www.sec.gov/Archives/edgar/data/1533040/000168316821001968/0001683168-21-001968-index.htm) Shelf registered | 333-256100 | 0001683168-21-001968 |
| 2021-02-17 | [424B5](https://www.sec.gov/Archives/edgar/data/1533040/000168316821000593/0001683168-21-000593-index.htm) Shelf takedown | 333-224031 | 0001683168-21-000593 |
| 2021-02-08 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999521000508/9999999995-21-000508-index.htm) Declared effective | 333-252588 | 9999999995-21-000508 |
| 2021-01-29 | [S-3](https://www.sec.gov/Archives/edgar/data/1533040/000168316821000315/0001683168-21-000315-index.htm) Shelf registered | 333-252588 | 0001683168-21-000315 |
| 2020-07-17 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999520001854/9999999995-20-001854-index.htm) Declared effective | 333-239779 | 9999999995-20-001854 |
| 2020-07-09 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000168316820002231/0001683168-20-002231-index.htm) Registration filed | 333-239779 | 0001683168-20-002231 |
| 2020-06-01 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999520001301/9999999995-20-001301-index.htm) Declared effective | 333-238204 | 9999999995-20-001301 |
| 2020-05-28 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000168316820001772/0001683168-20-001772-index.htm) Amendment | 333-238204 | 0001683168-20-001772 |
| 2020-05-12 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000168316820001524/0001683168-20-001524-index.htm) Registration filed | 333-238204 | 0001683168-20-001524 |
| 2020-04-01 | [424B5](https://www.sec.gov/Archives/edgar/data/1533040/000168316820001063/0001683168-20-001063-index.htm) Shelf takedown | 333-224031 | 0001683168-20-001063 |
| 2020-02-12 | [424B4](https://www.sec.gov/Archives/edgar/data/1533040/000168316820000451/0001683168-20-000451-index.htm) Final prospectus | 333-234032 | 0001683168-20-000451 |
| 2020-02-11 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999520000314/9999999995-20-000314-index.htm) Declared effective | 333-234032 | 9999999995-20-000314 |
| 2020-02-07 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000168316820000390/0001683168-20-000390-index.htm) Amendment | 333-234032 | 0001683168-20-000390 |
| 2020-02-06 | [424B5](https://www.sec.gov/Archives/edgar/data/1533040/000168316820000372/0001683168-20-000372-index.htm) Shelf takedown | 333-224031 | 0001683168-20-000372 |
| 2020-01-31 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000168316820000317/0001683168-20-000317-index.htm) Amendment | 333-234032 | 0001683168-20-000317 |
| 2019-11-18 | [424B5](https://www.sec.gov/Archives/edgar/data/1533040/000168316819003721/0001683168-19-003721-index.htm) Shelf takedown | 333-224031 | 0001683168-19-003721 |
| 2019-11-13 | [424B5](https://www.sec.gov/Archives/edgar/data/1533040/000168316819003573/0001683168-19-003573-index.htm) Shelf takedown | 333-224031 | 0001683168-19-003573 |
| 2019-10-01 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999519002218/9999999995-19-002218-index.htm) Declared effective | 333-233584 | 9999999995-19-002218 |
| 2019-10-01 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000168316819003116/0001683168-19-003116-index.htm) Registration filed | 333-234032 | 0001683168-19-003116 |
| 2019-09-25 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000168316819003041/0001683168-19-003041-index.htm) Amendment | 333-233584 | 0001683168-19-003041 |
| 2019-08-30 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000168316819002795/0001683168-19-002795-index.htm) Registration filed | 333-233584 | 0001683168-19-002795 |
| 2018-10-02 | [424B4](https://www.sec.gov/Archives/edgar/data/1533040/000168316818002919/0001683168-18-002919-index.htm) Final prospectus | 333-227173 | 0001683168-18-002919 |
| 2018-09-28 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999518002504/9999999995-18-002504-index.htm) Declared effective | 333-227173 | 9999999995-18-002504 |
| 2018-09-28 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000168316818002882/0001683168-18-002882-index.htm) Amendment | 333-227173 | 0001683168-18-002882 |
| 2018-09-14 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000168316818002758/0001683168-18-002758-index.htm) Amendment | 333-227173 | 0001683168-18-002758 |
| 2018-08-31 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000168316818002585/0001683168-18-002585-index.htm) Registration filed | 333-227173 | 0001683168-18-002585 |
| 2018-05-31 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999518001392/9999999995-18-001392-index.htm) Declared effective | 333-224799 | 9999999995-18-001392 |
| 2018-05-09 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000119312518157718/0001193125-18-157718-index.htm) Registration filed | 333-224799 | 0001193125-18-157718 |
| 2018-04-11 | [424B5](https://www.sec.gov/Archives/edgar/data/1533040/000119312518113521/0001193125-18-113521-index.htm) Shelf takedown | 333-224031 | 0001193125-18-113521 |
| 2018-04-06 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999518000779/9999999995-18-000779-index.htm) Declared effective | 333-224031 | 9999999995-18-000779 |
| 2018-03-29 | [S-3](https://www.sec.gov/Archives/edgar/data/1533040/000119312518102226/0001193125-18-102226-index.htm) Shelf registered | 333-224031 | 0001193125-18-102226 |
| 2017-08-30 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999517002233/9999999995-17-002233-index.htm) Declared effective | 333-220062 | 9999999995-17-002233 |
| 2017-08-18 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000119312517262349/0001193125-17-262349-index.htm) Registration filed | 333-220062 | 0001193125-17-262349 |
| 2017-08-08 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999517002061/9999999995-17-002061-index.htm) Declared effective | 333-219300 | 9999999995-17-002061 |
| 2017-07-31 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000119312517242561/0001193125-17-242561-index.htm) Amendment | 333-219300 | 0001193125-17-242561 |
| 2017-07-14 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000119312517228636/0001193125-17-228636-index.htm) Registration filed | 333-219300 | 0001193125-17-228636 |
| 2017-06-21 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999517001608/9999999995-17-001608-index.htm) Declared effective | 333-203389 | 9999999995-17-001608 |
| 2017-05-09 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999517001227/9999999995-17-001227-index.htm) Declared effective | 333-214199 | 9999999995-17-001227 |
| 2016-12-19 | [424B4](https://www.sec.gov/Archives/edgar/data/1533040/000119312516796197/0001193125-16-796197-index.htm) Final prospectus | 333-214199 | 0001193125-16-796197 |
| 2016-12-15 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999516006458/9999999995-16-006458-index.htm) Declared effective | 333-214199 | 9999999995-16-006458 |
| 2016-12-15 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000119312516793785/0001193125-16-793785-index.htm) Amendment | 333-214199 | 0001193125-16-793785 |
| 2016-12-14 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000119312516792793/0001193125-16-792793-index.htm) Amendment | 333-214199 | 0001193125-16-792793 |
| 2016-11-30 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000119312516779953/0001193125-16-779953-index.htm) Amendment | 333-214199 | 0001193125-16-779953 |
| 2016-11-14 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000119312516766243/0001193125-16-766243-index.htm) Amendment | 333-214199 | 0001193125-16-766243 |
| 2016-10-21 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000119312516743993/0001193125-16-743993-index.htm) Registration filed | 333-214199 | 0001193125-16-743993 |
| 2015-05-29 | [424B4](https://www.sec.gov/Archives/edgar/data/1533040/000119312515206742/0001193125-15-206742-index.htm) Final prospectus | 333-203389 | 0001193125-15-206742 |
| 2015-05-27 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999515001462/9999999995-15-001462-index.htm) Declared effective | 333-203389 | 9999999995-15-001462 |
| 2015-05-22 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000119312515197416/0001193125-15-197416-index.htm) Amendment | 333-203389 | 0001193125-15-197416 |
| 2015-05-21 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000119312515195466/0001193125-15-195466-index.htm) Amendment | 333-203389 | 0001193125-15-195466 |
| 2015-04-13 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000119312515127716/0001193125-15-127716-index.htm) Registration filed | 333-203389 | 0001193125-15-127716 |
| 2014-12-19 | [424B5](https://www.sec.gov/Archives/edgar/data/1533040/000119312514448649/0001193125-14-448649-index.htm) Shelf takedown | 333-194956 | 0001193125-14-448649 |
| 2014-04-18 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999514001058/9999999995-14-001058-index.htm) Declared effective | 333-194956 | 9999999995-14-001058 |
| 2014-04-01 | [S-3](https://www.sec.gov/Archives/edgar/data/1533040/000119312514126075/0001193125-14-126075-index.htm) Shelf registered | 333-194956 | 0001193125-14-126075 |
| 2013-09-30 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999513002832/9999999995-13-002832-index.htm) Declared effective | 333-191236 | 9999999995-13-002832 |
| 2013-09-18 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000119312513370444/0001193125-13-370444-index.htm) Registration filed | 333-191236 | 0001193125-13-370444 |
| 2013-08-08 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999513002352/9999999995-13-002352-index.htm) Declared effective | 333-188539 | 9999999995-13-002352 |
| 2013-07-26 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000119312513304770/0001193125-13-304770-index.htm) Amendment | 333-188539 | 0001193125-13-304770 |
| 2013-05-10 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000119312513214347/0001193125-13-214347-index.htm) Registration filed | 333-188539 | 0001193125-13-214347 |
| 2012-07-06 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999512002091/9999999995-12-002091-index.htm) Declared effective | 333-181534 | 9999999995-12-002091 |
| 2012-05-18 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000119312512240024/0001193125-12-240024-index.htm) Registration filed | 333-181534 | 0001193125-12-240024 |
| 2012-02-14 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1533040/999999999512000489/9999999995-12-000489-index.htm) Declared effective | 333-177498 | 9999999995-12-000489 |
| 2012-02-14 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000095012312002472/0000950123-12-002472-index.htm) Amendment | 333-177498 | 0000950123-12-002472 |
| 2012-02-13 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000095012312002294/0000950123-12-002294-index.htm) Amendment | 333-177498 | 0000950123-12-002294 |
| 2012-02-07 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000095012312002130/0000950123-12-002130-index.htm) Amendment | 333-177498 | 0000950123-12-002130 |
| 2012-01-23 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000095012312001079/0000950123-12-001079-index.htm) Amendment | 333-177498 | 0000950123-12-001079 |
| 2011-12-29 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000095012311104538/0000950123-11-104538-index.htm) Amendment | 333-177498 | 0000950123-11-104538 |
| 2011-12-08 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1533040/000095012311102498/0000950123-11-102498-index.htm) Amendment | 333-177498 | 0000950123-11-102498 |
| 2011-10-25 | [S-1](https://www.sec.gov/Archives/edgar/data/1533040/000095012311091680/0000950123-11-091680-index.htm) Registration filed | 333-177498 | 0000950123-11-091680 |

[All filings of this company](https://equitycapital.markets/filings?cik=1533040) · [CSV](https://equitycapital.markets/filings.csv?cik=1533040)

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Source page: https://equitycapital.markets/company/1533040 · Data: U.S. SEC EDGAR · CC BY 4.0