Theseus Pharmaceuticals, Inc.

Entity
Company
Industry
Pharmaceutical Preparations (Office Of Life Sciences)
Business address
314 Main Street, Suite 04 200, 02142 Cambridge, MA
Phone
(857) 400-9491
State of incorporation
DE
Fiscal year end
December 31
Category

Emerging growth company
All SEC filings
View on sec.gov
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Theseus Pharmaceuticals, Inc. has filed 181 SEC EDGAR filings since 6/29/2018

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
15-12G Open Document Open Filing 15-12G Feb 26, 2024 001-40869
SC 13D/A Open Document Open Filing AMENDMENT NO. 3 Feb 16, 2024 005-92944
EFFECT Open Document Open Filing Feb 15, 2024 333-268125
4 Open Document Open Filing OWNERSHIP DOCUMENT Feb 14, 2024 Feb 14, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Feb 14, 2024 Feb 14, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Feb 14, 2024 Feb 14, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Feb 14, 2024 Feb 14, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Feb 14, 2024 Feb 14, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Feb 14, 2024 Feb 14, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Feb 14, 2024 Feb 14, 2024
S-8 POS Open Document Open Filing S-8 POS Feb 14, 2024 333-270382
S-8 POS Open Document Open Filing S-8 POS Feb 14, 2024 333-260158
POS AM Open Document Open Filing POS AM Feb 14, 2024 333-268125
8-K Open Document | Data Open Filing FORM 8-K Feb 14, 2024 Feb 14, 2024 001-40869
SC TO-T/A Open Document Open Filing FORM SC TO-T/A Feb 14, 2024 005-92944
SC 14D9/A Open Document Open Filing SC 14D9/A Feb 14, 2024 005-92944
25-NSE Open Document Open Filing Feb 14, 2024 001-40869
SC 13G/A Open Document Open Filing SC 13G/A Feb 13, 2024 005-92944
CORRESP Open Document Open Filing Feb 7, 2024
SC 14D9/A Open Document Open Filing SC 14D9/A Feb 7, 2024 005-92944
SC TO-T/A Open Document Open Filing FORM SC TO-T/A Feb 7, 2024 005-92944
UPLOAD Open Document Open Filing Feb 2, 2024 005-92944
UPLOAD Open Document Open Filing Feb 2, 2024 005-92944
CORRESP Open Document Open Filing Jan 30, 2024
SC 14D9/A Open Document Open Filing SC 14D9/A Jan 30, 2024 005-92944
SC TO-T/A Open Document Open Filing SC TO-T/A Jan 30, 2024 005-92944
UPLOAD Open Document Open Filing Jan 22, 2024 005-92944
UPLOAD Open Document Open Filing Jan 22, 2024 005-92944
SC 13D/A Open Document Open Filing AMENDMENT NO. 2 Jan 12, 2024 005-92944
SC 14D9 Open Document Open Filing SC 14D9 Jan 10, 2024 005-92944
SC TO-T Open Document Open Filing SC TO-T Jan 9, 2024 005-92944
SC 13D/A Open Document Open Filing AMENDMENT NO. 1 Dec 28, 2023 005-92944
SC 13D/A Open Document Open Filing AMENDMENT NO. 5 Dec 27, 2023 005-92944
SC14D9C Open Document Open Filing SC14D9C Dec 22, 2023 005-92944
8-K Open Document | Data Open Filing FORM 8-K Dec 22, 2023 Dec 21, 2023 001-40869
8-K Open Document | Data Open Filing FORM 8-K Dec 4, 2023 Nov 29, 2023 001-40869
8-K Open Document | Data Open Filing FORM 8-K Nov 27, 2023 Nov 22, 2023 001-40869
SC 13D/A Open Document Open Filing AMENDMENT NO. 4 Nov 24, 2023 005-92944
SC 13D/A Open Document Open Filing AMENDMENT NO. 4 Nov 24, 2023 005-92944
SC 13D Open Document Open Filing Nov 24, 2023 005-92944
10-Q Open Document | Data Open Filing 10-Q Nov 17, 2023 Sep 30, 2023 001-40869
NT 10-Q Open Document Open Filing NT 10-Q Nov 15, 2023 Sep 30, 2023 001-40869
8-K Open Document | Data Open Filing 8-K Nov 13, 2023 Nov 6, 2023 001-40869
4 Open Document Open Filing FORM 4 Nov 7, 2023 Nov 6, 2023
8-K Open Document | Data Open Filing 8-K Oct 31, 2023 Oct 27, 2023 001-40869
SC 13G/A Open Document Open Filing Aug 10, 2023 005-92944
10-Q Open Document | Data Open Filing 10-Q Aug 10, 2023 Jun 30, 2023 001-40869
8-K Open Document | Data Open Filing 8-K Aug 10, 2023 Aug 10, 2023 001-40869
4 Open Document Open Filing Jul 19, 2023 Jul 17, 2023
4 Open Document Open Filing Jul 19, 2023 Jul 17, 2023
SC 13D/A Open Document Open Filing AMENDMENT NO. 3 Jul 19, 2023 005-92944
4 Open Document Open Filing FORM 4 SUBMISSION Jul 19, 2023 Jul 17, 2023
SC 13D/A Open Document Open Filing SC 13D/A Jul 19, 2023 005-92944
8-K Open Document | Data Open Filing FORM 8-K Jul 13, 2023 Jul 13, 2023 001-40869
4 Open Document Open Filing FORM 4 Jun 13, 2023 Jun 13, 2023
4 Open Document Open Filing FORM 4 Jun 13, 2023 Jun 13, 2023
4 Open Document Open Filing FORM 4 Jun 13, 2023 Jun 13, 2023
4 Open Document Open Filing FORM 4 Jun 13, 2023 Jun 13, 2023
4 Open Document Open Filing FORM 4 Jun 13, 2023 Jun 13, 2023
8-K Open Document | Data Open Filing 8-K Jun 9, 2023 Jun 9, 2023 001-40869
8-K Open Document | Data Open Filing 8-K May 25, 2023 May 25, 2023 001-40869
10-Q Open Document | Data Open Filing 10-Q May 11, 2023 Mar 31, 2023 001-40869
8-K Open Document | Data Open Filing 8-K May 11, 2023 May 11, 2023 001-40869
ARS Open Document Open Filing ARS Apr 26, 2023 Dec 31, 2022 001-40869
DEFA14A Open Document Open Filing DEFA14A Apr 26, 2023 001-40869
DEF 14A Open Document Open Filing DEF 14A Apr 26, 2023 Jun 9, 2023 001-40869
PRE 14A Open Document Open Filing PRE 14A Apr 14, 2023 Jun 9, 2023 001-40869
SC 13D/A Open Document Open Filing AMENDMENT NO. 2 Mar 14, 2023 005-92944
S-8 Open Document Open Filing FORM S-8 Mar 9, 2023 333-270382
10-K Open Document | Data Open Filing 10-K Mar 9, 2023 Dec 31, 2022 001-40869
8-K Open Document | Data Open Filing 8-K Mar 9, 2023 Mar 9, 2023 001-40869
4 Open Document Open Filing OWNERSHIP DOCUMENT Mar 2, 2023 Mar 1, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Mar 2, 2023 Mar 1, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Mar 2, 2023 Mar 1, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Mar 2, 2023 Mar 1, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Mar 2, 2023 Mar 1, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Feb 21, 2023 Feb 17, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Feb 21, 2023 Feb 17, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Feb 21, 2023 Feb 17, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Feb 21, 2023 Feb 17, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Feb 21, 2023 Feb 17, 2023
SC 13G/A Open Document Open Filing Feb 9, 2023 005-92944
SC 13G Open Document Open Filing SC 13G Jan 23, 2023 005-92944
8-K Open Document | Data Open Filing 8-K Jan 5, 2023 Jan 5, 2023 001-40869
SC 13D/A Open Document Open Filing SC 13D/A Jan 3, 2023 005-92944
4 Open Document Open Filing FORM 4 SUBMISSION Jan 3, 2023 Dec 29, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 3, 2023 Dec 29, 2022
SC 13G/A Open Document Open Filing Dec 12, 2022 005-92944
4 Open Document Open Filing OWNERSHIP DOCUMENT Dec 1, 2022 Nov 30, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Nov 14, 2022 Nov 11, 2022
EFFECT Open Document Open Filing Nov 10, 2022 333-268125
4 Open Document Open Filing Nov 9, 2022 Nov 7, 2022
4 Open Document Open Filing Nov 9, 2022 Nov 7, 2022
CORRESP Open Document Open Filing Nov 8, 2022
UPLOAD Open Document Open Filing Nov 8, 2022
S-3 Open Document Open Filing S-3 Nov 3, 2022 333-268125
10-Q Open Document | Data Open Filing 10-Q Nov 3, 2022 Sep 30, 2022 001-40869
8-K Open Document | Data Open Filing 8-K Nov 3, 2022 Nov 3, 2022 001-40869
4 Open Document Open Filing OWNERSHIP DOCUMENT Oct 19, 2022 Oct 17, 2022
3 Open Document Open Filing OWNERSHIP DOCUMENT Oct 19, 2022 Oct 17, 2022
8-K Open Document | Data Open Filing FORM 8-K Oct 19, 2022 Oct 17, 2022 001-40869
10-Q Open Document | Data Open Filing 10-Q Aug 11, 2022 Jun 30, 2022 001-40869
8-K Open Document | Data Open Filing 8-K Aug 11, 2022 Aug 11, 2022 001-40869
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 13, 2022 Jun 10, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 13, 2022 Jun 10, 2022
4 Open Document Open Filing OWNERSHIP DOCUMENT Jun 13, 2022 Jun 10, 2022
3 Open Document Open Filing FORM 3 SUBMISSION Jun 13, 2022 Jun 9, 2022
8-K Open Document | Data Open Filing 8-K Jun 13, 2022 Jun 10, 2022 001-40869
SC 13D/A Open Document Open Filing SC 13D/A Jun 13, 2022 005-92944
4 Open Document Open Filing FORM 4 SUBMISSION May 18, 2022 May 17, 2022
3 Open Document Open Filing FORM 3 SUBMISSION May 18, 2022 May 17, 2022
8-K Open Document | Data Open Filing 8-K May 18, 2022 May 18, 2022 001-40869
10-Q Open Document | Data Open Filing 10-Q May 12, 2022 Mar 31, 2022 001-40869
8-K Open Document | Data Open Filing 8-K May 12, 2022 May 12, 2022 001-40869
DEFA14A Open Document Open Filing DEFA14A Apr 25, 2022 001-40869
DEF 14A Open Document Open Filing DEF 14A Apr 25, 2022 Jun 10, 2022 001-40869
10-K Open Document | Data Open Filing 10-K Mar 10, 2022 Dec 31, 2021 001-40869
8-K Open Document | Data Open Filing 8-K Mar 10, 2022 Mar 10, 2022 001-40869
4 Open Document Open Filing FORM 4 SUBMISSION Feb 23, 2022 Feb 18, 2022
4 Open Document Open Filing FORM 4 SUBMISSION Feb 23, 2022 Feb 18, 2022
4 Open Document Open Filing FORM 4 SUBMISSION Feb 23, 2022 Feb 18, 2022
4 Open Document Open Filing FORM 4 SUBMISSION Feb 23, 2022 Feb 18, 2022
4 Open Document Open Filing FORM 4 SUBMISSION Feb 23, 2022 Feb 18, 2022
4 Open Document Open Filing FORM 4 SUBMISSION Feb 23, 2022 Feb 18, 2022
SC 13G/A Open Document Open Filing Feb 9, 2022 005-92944
4 Open Document Open Filing Jan 21, 2022 Jan 19, 2022
4 Open Document Open Filing Jan 21, 2022 Jan 19, 2022
4 Open Document Open Filing Jan 13, 2022 Jan 11, 2022
4 Open Document Open Filing Jan 13, 2022 Jan 11, 2022
8-K Open Document | Data Open Filing 8-K Jan 10, 2022 Jan 10, 2022 001-40869
4 Open Document Open Filing FORM 4 SUBMISSION Dec 22, 2021 Dec 21, 2021
4 Open Document Open Filing FORM 4 SUBMISSION Dec 22, 2021 Dec 21, 2021
SC 13D/A Open Document Open Filing AMENDMENT NO. 1 Nov 18, 2021 005-92944
10-Q Open Document | Data Open Filing 10-Q Nov 15, 2021 Sep 30, 2021 001-40869
8-K Open Document | Data Open Filing 8-K Nov 15, 2021 Nov 15, 2021 001-40869
SC 13G Open Document Open Filing Nov 10, 2021 005-92944
8-K Open Document Open Filing 8-K Oct 27, 2021 Oct 25, 2021 001-40869
SC 13D Open Document Open Filing SCHEDULE 13D Oct 19, 2021 005-92944
SC 13D Open Document Open Filing SC 13D Oct 18, 2021 005-92944
4 Open Document Open Filing FORM 4 Oct 15, 2021 Oct 12, 2021
3 Open Document Open Filing FORM 3 Oct 15, 2021 Oct 6, 2021
4 Open Document Open Filing FORM 4 SUBMISSION Oct 14, 2021 Oct 12, 2021
4 Open Document Open Filing FORM 4 SUBMISSION Oct 14, 2021 Oct 12, 2021
4 Open Document Open Filing FORM 4 SUBMISSION Oct 14, 2021 Oct 12, 2021
4 Open Document Open Filing FORM 4 SUBMISSION Oct 14, 2021 Oct 12, 2021
4 Open Document Open Filing FORM 4 SUBMISSION Oct 14, 2021 Oct 12, 2021
4 Open Document Open Filing FORM 4 SUBMISSION Oct 8, 2021 Oct 6, 2021
4 Open Document Open Filing FORM 4 SUBMISSION Oct 8, 2021 Oct 6, 2021
4 Open Document Open Filing FORM 4 SUBMISSION Oct 8, 2021 Oct 6, 2021
S-8 Open Document Open Filing S-8 Oct 8, 2021 333-260158
424B4 Open Document Open Filing 424B4 Oct 7, 2021 333-259549
SEC STAFF LETTER Open Document Open Filing Oct 6, 2021
EFFECT Open Document Open Filing Oct 6, 2021 333-259549
3 Open Document Open Filing FORM 3 SUBMISSION Oct 6, 2021 Oct 6, 2021
S-1MEF Open Document Open Filing S-1MEF Oct 6, 2021 333-260102
3 Open Document Open Filing FORM 3 SUBMISSION Oct 6, 2021 Oct 6, 2021
3 Open Document Open Filing FORM 3 SUBMISSION Oct 6, 2021 Oct 6, 2021
3 Open Document Open Filing FORM 3 SUBMISSION Oct 6, 2021 Oct 6, 2021
3 Open Document Open Filing FORM 3 SUBMISSION Oct 6, 2021 Oct 6, 2021
3 Open Document Open Filing FORM 3 SUBMISSION Oct 6, 2021 Oct 6, 2021
3 Open Document Open Filing FORM 3 SUBMISSION Oct 6, 2021 Oct 6, 2021
3 Open Document Open Filing FORM 3 SUBMISSION Oct 6, 2021 Oct 6, 2021
3 Open Document Open Filing FORM 3 SUBMISSION Oct 6, 2021 Oct 6, 2021
3 Open Document Open Filing FORM 3 SUBMISSION Oct 6, 2021 Oct 6, 2021
3 Open Document Open Filing FORM 3 SUBMISSION Oct 6, 2021 Oct 6, 2021
3 Open Document Open Filing FORM 3 SUBMISSION Oct 6, 2021 Oct 6, 2021
3 Open Document Open Filing FORM 3 SUBMISSION Oct 6, 2021 Oct 6, 2021
CERT Open Document Open Filing Oct 6, 2021 001-40869
CORRESP Open Document Open Filing Oct 4, 2021
CORRESP Open Document Open Filing Oct 4, 2021
8-A12B Open Document Open Filing 8-A12B Oct 1, 2021 001-40869
S-1/A Open Document Open Filing S-1/A Sep 30, 2021 333-259549
S-1 Open Document Open Filing S-1 Sep 15, 2021 333-259549
SEC STAFF LETTER Open Document Open Filing Aug 30, 2021
DRSLTR Open Document Open Filing Aug 23, 2021
DRS/A Open Document Open Filing Aug 23, 2021 377-05224
UPLOAD Open Document Open Filing Aug 11, 2021
DRS Open Document Open Filing Jul 20, 2021 377-05224
D Open Document Open Filing Feb 4, 2021 021-388439
D/A Open Document Open Filing Feb 4, 2021 021-315789
D Open Document Open Filing Jun 29, 2018 021-315789