Company · CIK 882361 # Aptose Biosciences Inc. | CIK | [882361](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000882361) (SEC EDGAR) | | --- | --- | | Industry (SIC) | 2836 — Biological Products, (No Diagnostic Substances) | | Incorporated in | A6 | | Listed | no ticker on SEC record today | | First annual or quarterly report | 2002-12-16 | ## Offerings 10 registrations | Registration | Label and status | First filed | Last event | Filings | | --- | --- | --- | --- | --- | | 333-284927 | Registered company Withdrawn | 2025-02-13 | 2026-03-23 | 2 | | 333-267801 | Shelf Effective | 2022-10-11 | 2025-02-03 | 6 | | 333-281201 | Registered company Final prospectus | 2024-08-02 | 2024-11-25 | 4 | | 333-275870 | Registered company Final prospectus | 2023-12-04 | 2024-01-26 | 6 | | 333-272752 | Registered company Effective | 2023-06-20 | 2023-06-30 | 3 | | 333-235730 | Shelf Effective | 2019-12-27 | 2022-11-29 | 6 | | 333-230218 | Shelf Effective | 2019-03-12 | 2019-12-18 | 9 | | 333-221783 | Registered company Effective | 2017-11-28 | 2018-04-11 | 4 | | 333-200660 | Shelf Effective | 2014-12-01 | 2015-04-03 | 3 | | 333-165922 | Registered company Withdrawn | 2010-04-06 | 2010-09-01 | 3 | ## Filings 47 | Filed | Filing | Registration | Accession | | --- | --- | --- | --- | | 2026-03-23 | [RW](https://www.sec.gov/Archives/edgar/data/882361/000119312526119982/0001193125-26-119982-index.htm) Withdrawn | 333-284927 | 0001193125-26-119982 | | 2025-02-13 | [S-1](https://www.sec.gov/Archives/edgar/data/882361/000119312525026207/0001193125-25-026207-index.htm) Registration filed | 333-284927 | 0001193125-25-026207 | | 2025-02-03 | [424B5](https://www.sec.gov/Archives/edgar/data/882361/000119312525019320/0001193125-25-019320-index.htm) Shelf takedown | 333-267801 | 0001193125-25-019320 | | 2024-11-25 | [424B4](https://www.sec.gov/Archives/edgar/data/882361/000119312524264687/0001193125-24-264687-index.htm) Final prospectus | 333-281201 | 0001193125-24-264687 | | 2024-11-21 | [EFFECT](https://www.sec.gov/Archives/edgar/data/882361/999999999524003536/9999999995-24-003536-index.htm) Declared effective | 333-281201 | 9999999995-24-003536 | | 2024-10-31 | [S-1/A](https://www.sec.gov/Archives/edgar/data/882361/000119312524247920/0001193125-24-247920-index.htm) Amendment | 333-281201 | 0001193125-24-247920 | | 2024-08-02 | [S-1](https://www.sec.gov/Archives/edgar/data/882361/000119312524191837/0001193125-24-191837-index.htm) Registration filed | 333-281201 | 0001193125-24-191837 | | 2024-06-03 | [424B5](https://www.sec.gov/Archives/edgar/data/882361/000119312524152291/0001193125-24-152291-index.htm) Shelf takedown | 333-267801 | 0001193125-24-152291 | | 2024-01-26 | [424B4](https://www.sec.gov/Archives/edgar/data/882361/000119312524016897/0001193125-24-016897-index.htm) Final prospectus | 333-275870 | 0001193125-24-016897 | | 2024-01-25 | [EFFECT](https://www.sec.gov/Archives/edgar/data/882361/999999999524000207/9999999995-24-000207-index.htm) Declared effective | 333-275870 | 9999999995-24-000207 | | 2024-01-22 | [S-1/A](https://www.sec.gov/Archives/edgar/data/882361/000119312524011444/0001193125-24-011444-index.htm) Amendment | 333-275870 | 0001193125-24-011444 | | 2023-12-29 | [S-1/A](https://www.sec.gov/Archives/edgar/data/882361/000119312523305968/0001193125-23-305968-index.htm) Amendment | 333-275870 | 0001193125-23-305968 | | 2023-12-11 | [S-1/A](https://www.sec.gov/Archives/edgar/data/882361/000119312523292033/0001193125-23-292033-index.htm) Amendment | 333-275870 | 0001193125-23-292033 | | 2023-12-04 | [S-1](https://www.sec.gov/Archives/edgar/data/882361/000119312523287678/0001193125-23-287678-index.htm) Registration filed | 333-275870 | 0001193125-23-287678 | | 2023-06-30 | [EFFECT](https://www.sec.gov/Archives/edgar/data/882361/999999999523001959/9999999995-23-001959-index.htm) Declared effective | 333-272752 | 9999999995-23-001959 | | 2023-06-28 | [S-1/A](https://www.sec.gov/Archives/edgar/data/882361/000117184323004223/0001171843-23-004223-index.htm) Amendment | 333-272752 | 0001171843-23-004223 | | 2023-06-20 | [S-1](https://www.sec.gov/Archives/edgar/data/882361/000117184323003970/0001171843-23-003970-index.htm) Registration filed | 333-272752 | 0001171843-23-003970 | | 2023-04-03 | [424B5](https://www.sec.gov/Archives/edgar/data/882361/000117184323002094/0001171843-23-002094-index.htm) Shelf takedown | 333-267801 | 0001171843-23-002094 | | 2022-12-12 | [424B5](https://www.sec.gov/Archives/edgar/data/882361/000117184322007963/0001171843-22-007963-index.htm) Shelf takedown | 333-267801 | 0001171843-22-007963 | | 2022-11-29 | [424B5](https://www.sec.gov/Archives/edgar/data/882361/000117184322007718/0001171843-22-007718-index.htm) Shelf takedown | 333-235730 | 0001171843-22-007718 | | 2022-10-21 | [EFFECT](https://www.sec.gov/Archives/edgar/data/882361/999999999522003108/9999999995-22-003108-index.htm) Declared effective | 333-267801 | 9999999995-22-003108 | | 2022-10-11 | [S-3](https://www.sec.gov/Archives/edgar/data/882361/000117184322006508/0001171843-22-006508-index.htm) Shelf registered | 333-267801 | 0001171843-22-006508 | | 2020-07-16 | [424B5](https://www.sec.gov/Archives/edgar/data/882361/000119312520193974/0001193125-20-193974-index.htm) Shelf takedown | 333-235730 | 0001193125-20-193974 | | 2020-07-15 | [424B5](https://www.sec.gov/Archives/edgar/data/882361/000119312520193349/0001193125-20-193349-index.htm) Shelf takedown | 333-235730 | 0001193125-20-193349 | | 2020-05-05 | [424B5](https://www.sec.gov/Archives/edgar/data/882361/000119312520133810/0001193125-20-133810-index.htm) Shelf takedown | 333-235730 | 0001193125-20-133810 | | 2020-01-09 | [EFFECT](https://www.sec.gov/Archives/edgar/data/882361/999999999520000056/9999999995-20-000056-index.htm) Declared effective | 333-235730 | 9999999995-20-000056 | | 2019-12-27 | [S-3](https://www.sec.gov/Archives/edgar/data/882361/000119312519324938/0001193125-19-324938-index.htm) Shelf registered | 333-235730 | 0001193125-19-324938 | | 2019-12-18 | [424B5](https://www.sec.gov/Archives/edgar/data/882361/000119312519316451/0001193125-19-316451-index.htm) Shelf takedown | 333-230218 | 0001193125-19-316451 | | 2019-12-16 | [424B5](https://www.sec.gov/Archives/edgar/data/882361/000119312519315321/0001193125-19-315321-index.htm) Shelf takedown | 333-230218 | 0001193125-19-315321 | | 2019-05-30 | [424B5](https://www.sec.gov/Archives/edgar/data/882361/000119312519161277/0001193125-19-161277-index.htm) Shelf takedown | 333-230218 | 0001193125-19-161277 | | 2019-05-29 | [424B5](https://www.sec.gov/Archives/edgar/data/882361/000119312519159730/0001193125-19-159730-index.htm) Shelf takedown | 333-230218 | 0001193125-19-159730 | | 2019-05-24 | [424B5](https://www.sec.gov/Archives/edgar/data/882361/000119312519157190/0001193125-19-157190-index.htm) Shelf takedown | 333-230218 | 0001193125-19-157190 | | 2019-05-13 | [424B5](https://www.sec.gov/Archives/edgar/data/882361/000119312519144493/0001193125-19-144493-index.htm) Shelf takedown | 333-230218 | 0001193125-19-144493 | | 2019-05-03 | [424B5](https://www.sec.gov/Archives/edgar/data/882361/000119312519136640/0001193125-19-136640-index.htm) Shelf takedown | 333-230218 | 0001193125-19-136640 | | 2019-04-25 | [EFFECT](https://www.sec.gov/Archives/edgar/data/882361/999999999519000828/9999999995-19-000828-index.htm) Declared effective | 333-230218 | 9999999995-19-000828 | | 2019-03-12 | [S-3](https://www.sec.gov/Archives/edgar/data/882361/000117184319001672/0001171843-19-001672-index.htm) Shelf registered | 333-230218 | 0001171843-19-001672 | | 2018-04-11 | [EFFECT](https://www.sec.gov/Archives/edgar/data/882361/999999999518000801/9999999995-18-000801-index.htm) Declared effective | 333-221783 | 9999999995-18-000801 | | 2018-03-14 | [EFFECT](https://www.sec.gov/Archives/edgar/data/882361/999999999518000598/9999999995-18-000598-index.htm) Declared effective | 333-222909 | 9999999995-18-000598 | | 2017-12-21 | [EFFECT](https://www.sec.gov/Archives/edgar/data/882361/999999999517003287/9999999995-17-003287-index.htm) Declared effective | 333-221783 | 9999999995-17-003287 | | 2017-12-19 | [F-1/A](https://www.sec.gov/Archives/edgar/data/882361/000119312517373749/0001193125-17-373749-index.htm) Amendment | 333-221783 | 0001193125-17-373749 | | 2017-11-28 | [F-1](https://www.sec.gov/Archives/edgar/data/882361/000119312517353974/0001193125-17-353974-index.htm) Registration filed | 333-221783 | 0001193125-17-353974 | | 2015-04-03 | [424B5](https://www.sec.gov/Archives/edgar/data/882361/000127956915000642/0001279569-15-000642-index.htm) Shelf takedown | 333-200660 | 0001279569-15-000642 | | 2014-12-29 | [EFFECT](https://www.sec.gov/Archives/edgar/data/882361/999999999514003891/9999999995-14-003891-index.htm) Declared effective | 333-200660 | 9999999995-14-003891 | | 2014-12-01 | [F-3](https://www.sec.gov/Archives/edgar/data/882361/000127956914001950/0001279569-14-001950-index.htm) Shelf registered | 333-200660 | 0001279569-14-001950 | | 2010-09-01 | [RW](https://www.sec.gov/Archives/edgar/data/882361/000091228210000750/0000912282-10-000750-index.htm) Withdrawn | 333-165922 | 0000912282-10-000750 | | 2010-06-03 | [F-1/A](https://www.sec.gov/Archives/edgar/data/882361/000104746910005717/0001047469-10-005717-index.htm) Amendment | 333-165922 | 0001047469-10-005717 | | 2010-04-06 | [F-1](https://www.sec.gov/Archives/edgar/data/882361/000127956910000416/0001279569-10-000416-index.htm) Registration filed | 333-165922 | 0001279569-10-000416 | [All filings of this company](https://equitycapital.markets/filings?cik=882361) · [CSV](https://equitycapital.markets/filings.csv?cik=882361) --- Source page: https://equitycapital.markets/company/882361 · Data: U.S. SEC EDGAR · CC BY 4.0