SEC EDGAR filings, ownership reports, and insider transactions for Theseus Pharmaceuticals, Inc..
| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) |
|---|---|---|---|---|---|---|
| 15-12G | Open Document | Open Filing | 15-12G | 26 Feb 2024 | 001-40869 | |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 3 | 16 Feb 2024 | 005-92944 | |
| EFFECT | Open Document | Open Filing | 15 Feb 2024 | 333-268125 | ||
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Feb 2024 | 14 Feb 2024 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Feb 2024 | 14 Feb 2024 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Feb 2024 | 14 Feb 2024 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Feb 2024 | 14 Feb 2024 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Feb 2024 | 14 Feb 2024 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Feb 2024 | 14 Feb 2024 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Feb 2024 | 14 Feb 2024 | |
| S-8 POS | Open Document | Open Filing | S-8 POS | 14 Feb 2024 | 333-270382 | |
| S-8 POS | Open Document | Open Filing | S-8 POS | 14 Feb 2024 | 333-260158 | |
| POS AM | Open Document | Open Filing | POS AM | 14 Feb 2024 | 333-268125 | |
| 8-K | Open Document | Data | Open Filing | FORM 8-K | 14 Feb 2024 | 14 Feb 2024 | 001-40869 |
| SC TO-T/A | Open Document | Open Filing | FORM SC TO-T/A | 14 Feb 2024 | 005-92944 | |
| SC 14D9/A | Open Document | Open Filing | SC 14D9/A | 14 Feb 2024 | 005-92944 | |
| 25-NSE | Open Document | Open Filing | 14 Feb 2024 | 001-40869 | ||
| SC 13G/A | Open Document | Open Filing | SC 13G/A | 13 Feb 2024 | 005-92944 | |
| CORRESP | Open Document | Open Filing | 07 Feb 2024 | |||
| SC 14D9/A | Open Document | Open Filing | SC 14D9/A | 07 Feb 2024 | 005-92944 | |
| SC TO-T/A | Open Document | Open Filing | FORM SC TO-T/A | 07 Feb 2024 | 005-92944 | |
| UPLOAD | Open Document | Open Filing | 02 Feb 2024 | 005-92944 | ||
| UPLOAD | Open Document | Open Filing | 02 Feb 2024 | 005-92944 | ||
| CORRESP | Open Document | Open Filing | 30 Jan 2024 | |||
| SC 14D9/A | Open Document | Open Filing | SC 14D9/A | 30 Jan 2024 | 005-92944 | |
| SC TO-T/A | Open Document | Open Filing | SC TO-T/A | 30 Jan 2024 | 005-92944 | |
| UPLOAD | Open Document | Open Filing | 22 Jan 2024 | 005-92944 | ||
| UPLOAD | Open Document | Open Filing | 22 Jan 2024 | 005-92944 | ||
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 2 | 12 Jan 2024 | 005-92944 | |
| SC 14D9 | Open Document | Open Filing | SC 14D9 | 10 Jan 2024 | 005-92944 | |
| SC TO-T | Open Document | Open Filing | SC TO-T | 09 Jan 2024 | 005-92944 | |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 1 | 28 Dec 2023 | 005-92944 | |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 5 | 27 Dec 2023 | 005-92944 | |
| SC14D9C | Open Document | Open Filing | SC14D9C | 22 Dec 2023 | 005-92944 | |
| 8-K | Open Document | Data | Open Filing | FORM 8-K | 22 Dec 2023 | 21 Dec 2023 | 001-40869 |
| 8-K | Open Document | Data | Open Filing | FORM 8-K | 04 Dec 2023 | 29 Nov 2023 | 001-40869 |
| 8-K | Open Document | Data | Open Filing | FORM 8-K | 27 Nov 2023 | 22 Nov 2023 | 001-40869 |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 4 | 24 Nov 2023 | 005-92944 | |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 4 | 24 Nov 2023 | 005-92944 | |
| SC 13D | Open Document | Open Filing | 24 Nov 2023 | 005-92944 | ||
| 10-Q | Open Document | Data | Open Filing | 10-Q | 17 Nov 2023 | 30 Sep 2023 | 001-40869 |
| NT 10-Q | Open Document | Open Filing | NT 10-Q | 15 Nov 2023 | 30 Sep 2023 | 001-40869 |
| 8-K | Open Document | Data | Open Filing | 8-K | 13 Nov 2023 | 06 Nov 2023 | 001-40869 |
| 4 | Open Document | Open Filing | FORM 4 | 07 Nov 2023 | 06 Nov 2023 | |
| 8-K | Open Document | Data | Open Filing | 8-K | 31 Oct 2023 | 27 Oct 2023 | 001-40869 |
| SC 13G/A | Open Document | Open Filing | 10 Aug 2023 | 005-92944 | ||
| 10-Q | Open Document | Data | Open Filing | 10-Q | 10 Aug 2023 | 30 Jun 2023 | 001-40869 |
| 8-K | Open Document | Data | Open Filing | 8-K | 10 Aug 2023 | 10 Aug 2023 | 001-40869 |
| 4 | Open Document | Open Filing | 19 Jul 2023 | 17 Jul 2023 | ||
| 4 | Open Document | Open Filing | 19 Jul 2023 | 17 Jul 2023 | ||
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 3 | 19 Jul 2023 | 005-92944 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 19 Jul 2023 | 17 Jul 2023 | |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | 19 Jul 2023 | 005-92944 | |
| 8-K | Open Document | Data | Open Filing | FORM 8-K | 13 Jul 2023 | 13 Jul 2023 | 001-40869 |
| 4 | Open Document | Open Filing | FORM 4 | 13 Jun 2023 | 13 Jun 2023 | |
| 4 | Open Document | Open Filing | FORM 4 | 13 Jun 2023 | 13 Jun 2023 | |
| 4 | Open Document | Open Filing | FORM 4 | 13 Jun 2023 | 13 Jun 2023 | |
| 4 | Open Document | Open Filing | FORM 4 | 13 Jun 2023 | 13 Jun 2023 | |
| 4 | Open Document | Open Filing | FORM 4 | 13 Jun 2023 | 13 Jun 2023 | |
| 8-K | Open Document | Data | Open Filing | 8-K | 09 Jun 2023 | 09 Jun 2023 | 001-40869 |
| 8-K | Open Document | Data | Open Filing | 8-K | 25 May 2023 | 25 May 2023 | 001-40869 |
| 10-Q | Open Document | Data | Open Filing | 10-Q | 11 May 2023 | 31 Mar 2023 | 001-40869 |
| 8-K | Open Document | Data | Open Filing | 8-K | 11 May 2023 | 11 May 2023 | 001-40869 |
| ARS | Open Document | Open Filing | ARS | 26 Apr 2023 | 31 Dec 2022 | 001-40869 |
| DEFA14A | Open Document | Open Filing | DEFA14A | 26 Apr 2023 | 001-40869 | |
| DEF 14A | Open Document | Open Filing | DEF 14A | 26 Apr 2023 | 09 Jun 2023 | 001-40869 |
| PRE 14A | Open Document | Open Filing | PRE 14A | 14 Apr 2023 | 09 Jun 2023 | 001-40869 |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 2 | 14 Mar 2023 | 005-92944 | |
| S-8 | Open Document | Open Filing | FORM S-8 | 09 Mar 2023 | 333-270382 | |
| 10-K | Open Document | Data | Open Filing | 10-K | 09 Mar 2023 | 31 Dec 2022 | 001-40869 |
| 8-K | Open Document | Data | Open Filing | 8-K | 09 Mar 2023 | 09 Mar 2023 | 001-40869 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 02 Mar 2023 | 01 Mar 2023 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 02 Mar 2023 | 01 Mar 2023 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 02 Mar 2023 | 01 Mar 2023 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 02 Mar 2023 | 01 Mar 2023 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 02 Mar 2023 | 01 Mar 2023 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 21 Feb 2023 | 17 Feb 2023 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 21 Feb 2023 | 17 Feb 2023 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 21 Feb 2023 | 17 Feb 2023 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 21 Feb 2023 | 17 Feb 2023 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 21 Feb 2023 | 17 Feb 2023 | |
| SC 13G/A | Open Document | Open Filing | 09 Feb 2023 | 005-92944 | ||
| SC 13G | Open Document | Open Filing | SC 13G | 23 Jan 2023 | 005-92944 | |
| 8-K | Open Document | Data | Open Filing | 8-K | 05 Jan 2023 | 05 Jan 2023 | 001-40869 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | 03 Jan 2023 | 005-92944 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 03 Jan 2023 | 29 Dec 2022 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 03 Jan 2023 | 29 Dec 2022 | |
| SC 13G/A | Open Document | Open Filing | 12 Dec 2022 | 005-92944 | ||
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 01 Dec 2022 | 30 Nov 2022 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 14 Nov 2022 | 11 Nov 2022 | |
| EFFECT | Open Document | Open Filing | 10 Nov 2022 | 333-268125 | ||
| 4 | Open Document | Open Filing | 09 Nov 2022 | 07 Nov 2022 | ||
| 4 | Open Document | Open Filing | 09 Nov 2022 | 07 Nov 2022 | ||
| CORRESP | Open Document | Open Filing | 08 Nov 2022 | |||
| UPLOAD | Open Document | Open Filing | 08 Nov 2022 | |||
| S-3 | Open Document | Open Filing | S-3 | 03 Nov 2022 | 333-268125 | |
| 10-Q | Open Document | Data | Open Filing | 10-Q | 03 Nov 2022 | 30 Sep 2022 | 001-40869 |
| 8-K | Open Document | Data | Open Filing | 8-K | 03 Nov 2022 | 03 Nov 2022 | 001-40869 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 19 Oct 2022 | 17 Oct 2022 | |
| 3 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 19 Oct 2022 | 17 Oct 2022 | |
| 8-K | Open Document | Data | Open Filing | FORM 8-K | 19 Oct 2022 | 17 Oct 2022 | 001-40869 |
| 10-Q | Open Document | Data | Open Filing | 10-Q | 11 Aug 2022 | 30 Jun 2022 | 001-40869 |
| 8-K | Open Document | Data | Open Filing | 8-K | 11 Aug 2022 | 11 Aug 2022 | 001-40869 |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 13 Jun 2022 | 10 Jun 2022 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 13 Jun 2022 | 10 Jun 2022 | |
| 4 | Open Document | Open Filing | OWNERSHIP DOCUMENT | 13 Jun 2022 | 10 Jun 2022 | |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 13 Jun 2022 | 09 Jun 2022 | |
| 8-K | Open Document | Data | Open Filing | 8-K | 13 Jun 2022 | 10 Jun 2022 | 001-40869 |
| SC 13D/A | Open Document | Open Filing | SC 13D/A | 13 Jun 2022 | 005-92944 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 18 May 2022 | 17 May 2022 | |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 18 May 2022 | 17 May 2022 | |
| 8-K | Open Document | Data | Open Filing | 8-K | 18 May 2022 | 18 May 2022 | 001-40869 |
| 10-Q | Open Document | Data | Open Filing | 10-Q | 12 May 2022 | 31 Mar 2022 | 001-40869 |
| 8-K | Open Document | Data | Open Filing | 8-K | 12 May 2022 | 12 May 2022 | 001-40869 |
| DEFA14A | Open Document | Open Filing | DEFA14A | 25 Apr 2022 | 001-40869 | |
| DEF 14A | Open Document | Open Filing | DEF 14A | 25 Apr 2022 | 10 Jun 2022 | 001-40869 |
| 10-K | Open Document | Data | Open Filing | 10-K | 10 Mar 2022 | 31 Dec 2021 | 001-40869 |
| 8-K | Open Document | Data | Open Filing | 8-K | 10 Mar 2022 | 10 Mar 2022 | 001-40869 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 23 Feb 2022 | 18 Feb 2022 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 23 Feb 2022 | 18 Feb 2022 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 23 Feb 2022 | 18 Feb 2022 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 23 Feb 2022 | 18 Feb 2022 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 23 Feb 2022 | 18 Feb 2022 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 23 Feb 2022 | 18 Feb 2022 | |
| SC 13G/A | Open Document | Open Filing | 09 Feb 2022 | 005-92944 | ||
| 4 | Open Document | Open Filing | 21 Jan 2022 | 19 Jan 2022 | ||
| 4 | Open Document | Open Filing | 21 Jan 2022 | 19 Jan 2022 | ||
| 4 | Open Document | Open Filing | 13 Jan 2022 | 11 Jan 2022 | ||
| 4 | Open Document | Open Filing | 13 Jan 2022 | 11 Jan 2022 | ||
| 8-K | Open Document | Data | Open Filing | 8-K | 10 Jan 2022 | 10 Jan 2022 | 001-40869 |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 22 Dec 2021 | 21 Dec 2021 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 22 Dec 2021 | 21 Dec 2021 | |
| SC 13D/A | Open Document | Open Filing | AMENDMENT NO. 1 | 18 Nov 2021 | 005-92944 | |
| 10-Q | Open Document | Data | Open Filing | 10-Q | 15 Nov 2021 | 30 Sep 2021 | 001-40869 |
| 8-K | Open Document | Data | Open Filing | 8-K | 15 Nov 2021 | 15 Nov 2021 | 001-40869 |
| SC 13G | Open Document | Open Filing | 10 Nov 2021 | 005-92944 | ||
| 8-K | Open Document | Open Filing | 8-K | 27 Oct 2021 | 25 Oct 2021 | 001-40869 |
| SC 13D | Open Document | Open Filing | SCHEDULE 13D | 19 Oct 2021 | 005-92944 | |
| SC 13D | Open Document | Open Filing | SC 13D | 18 Oct 2021 | 005-92944 | |
| 4 | Open Document | Open Filing | FORM 4 | 15 Oct 2021 | 12 Oct 2021 | |
| 3 | Open Document | Open Filing | FORM 3 | 15 Oct 2021 | 06 Oct 2021 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 14 Oct 2021 | 12 Oct 2021 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 14 Oct 2021 | 12 Oct 2021 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 14 Oct 2021 | 12 Oct 2021 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 14 Oct 2021 | 12 Oct 2021 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 14 Oct 2021 | 12 Oct 2021 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 08 Oct 2021 | 06 Oct 2021 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 08 Oct 2021 | 06 Oct 2021 | |
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | 08 Oct 2021 | 06 Oct 2021 | |
| S-8 | Open Document | Open Filing | S-8 | 08 Oct 2021 | 333-260158 | |
| 424B4 | Open Document | Open Filing | 424B4 | 07 Oct 2021 | 333-259549 | |
| SEC STAFF LETTER | Open Document | Open Filing | 06 Oct 2021 | |||
| EFFECT | Open Document | Open Filing | 06 Oct 2021 | 333-259549 | ||
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 06 Oct 2021 | 06 Oct 2021 | |
| S-1MEF | Open Document | Open Filing | S-1MEF | 06 Oct 2021 | 333-260102 | |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 06 Oct 2021 | 06 Oct 2021 | |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 06 Oct 2021 | 06 Oct 2021 | |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 06 Oct 2021 | 06 Oct 2021 | |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 06 Oct 2021 | 06 Oct 2021 | |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 06 Oct 2021 | 06 Oct 2021 | |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 06 Oct 2021 | 06 Oct 2021 | |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 06 Oct 2021 | 06 Oct 2021 | |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 06 Oct 2021 | 06 Oct 2021 | |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 06 Oct 2021 | 06 Oct 2021 | |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 06 Oct 2021 | 06 Oct 2021 | |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 06 Oct 2021 | 06 Oct 2021 | |
| 3 | Open Document | Open Filing | FORM 3 SUBMISSION | 06 Oct 2021 | 06 Oct 2021 | |
| CERT | Open Document | Open Filing | 06 Oct 2021 | 001-40869 | ||
| CORRESP | Open Document | Open Filing | 04 Oct 2021 | |||
| CORRESP | Open Document | Open Filing | 04 Oct 2021 | |||
| 8-A12B | Open Document | Open Filing | 8-A12B | 01 Oct 2021 | 001-40869 | |
| S-1/A | Open Document | Open Filing | S-1/A | 30 Sep 2021 | 333-259549 | |
| S-1 | Open Document | Open Filing | S-1 | 15 Sep 2021 | 333-259549 | |
| SEC STAFF LETTER | Open Document | Open Filing | 30 Aug 2021 | |||
| DRSLTR | Open Document | Open Filing | 23 Aug 2021 | |||
| DRS/A | Open Document | Open Filing | 23 Aug 2021 | 377-05224 | ||
| UPLOAD | Open Document | Open Filing | 11 Aug 2021 | |||
| DRS | Open Document | Open Filing | 20 Jul 2021 | 377-05224 | ||
| D | Open Document | Open Filing | 04 Feb 2021 | 021-388439 | ||
| D/A | Open Document | Open Filing | 04 Feb 2021 | 021-315789 | ||
| D | Open Document | Open Filing | 29 Jun 2018 | 021-315789 |