Lexeo Therapeutics, Inc.

Symbol
LXEO on Nasdaq
Entity
Company
Industry
Biological Products, (No Disgnostic Substances) (Office Of Life Sciences)
Business address
345 Park Avenue South, Floor 6, 10010 New York, NY
Phone
(212) 547-9879
Fiscal year end
December 31
Category
Non-accelerated filer
Smaller reporting company
Emerging growth company
All SEC filings
View on sec.gov
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Lexeo Therapeutics, Inc. has filed 273 SEC EDGAR filings since 2/4/2022

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
EFFECT Open Document Open Filing Nov 26, 2025 333-291269
424B3 Open Document Open Filing 424B3 Nov 26, 2025 333-291269
4 Open Document Open Filing Nov 20, 2025 Nov 18, 2025
4 Open Document Open Filing Nov 20, 2025 Nov 18, 2025
4 Open Document Open Filing Nov 20, 2025 Nov 18, 2025
4 Open Document Open Filing Nov 20, 2025 Nov 18, 2025
4 Open Document Open Filing Nov 20, 2025 Nov 18, 2025
SCHEDULE 13G Open Document Open Filing Nov 20, 2025 005-94231
144 Open Document Open Filing Nov 18, 2025 001-41855
144 Open Document Open Filing Nov 18, 2025 001-41855
144 Open Document Open Filing Nov 18, 2025 001-41855
144 Open Document Open Filing Nov 18, 2025 001-41855
144 Open Document Open Filing Nov 18, 2025 001-41855
SCHEDULE 13G/A Open Document Open Filing Nov 14, 2025 005-94231
SCHEDULE 13G/A Open Document Open Filing Nov 14, 2025 005-94231
SCHEDULE 13G/A Open Document Open Filing Nov 14, 2025 005-94231
SCHEDULE 13G/A Open Document Open Filing Nov 14, 2025 005-94231
SCHEDULE 13G/A Open Document Open Filing Nov 7, 2025 005-94231
S-3 Open Document | Data Open Filing S-3 Nov 5, 2025 333-291269
S-8 Open Document | Data Open Filing S-8 Nov 5, 2025 333-291268
10-Q Open Document | Data Open Filing 10-Q Nov 5, 2025 Sep 30, 2025 001-41855
8-K Open Document | Data Open Filing 8-K Nov 5, 2025 Nov 5, 2025 001-41855
SCHEDULE 13G Open Document Open Filing Oct 27, 2025 005-94231
4 Open Document Open Filing Oct 17, 2025 Oct 15, 2025
4 Open Document Open Filing Oct 17, 2025 Oct 15, 2025
4 Open Document Open Filing Oct 17, 2025 Oct 15, 2025
4 Open Document Open Filing Oct 17, 2025 Oct 15, 2025
4 Open Document Open Filing Oct 17, 2025 Oct 15, 2025
SCHEDULE 13G/A Open Document Open Filing Oct 17, 2025 005-94231
8-K Open Document | Data Open Filing 8-K Oct 17, 2025 Oct 16, 2025 001-41855
424B5 Open Document Open Filing 424B5 Oct 17, 2025 333-283781
144 Open Document Open Filing Oct 17, 2025 001-41855
144 Open Document Open Filing Oct 17, 2025 001-41855
144 Open Document Open Filing Oct 17, 2025 001-41855
144 Open Document Open Filing Oct 17, 2025 001-41855
144 Open Document Open Filing Oct 17, 2025 001-41855
FWP Open Document Open Filing FWP Oct 17, 2025 333-283781
424B5 Open Document Open Filing 424B5 Oct 16, 2025 333-283781
FWP Open Document Open Filing FWP Oct 16, 2025 333-283781
8-K Open Document | Data Open Filing 8-K Oct 7, 2025 Oct 7, 2025 001-41855
4 Open Document Open Filing Sep 16, 2025 Sep 12, 2025
4/A Open Document Open Filing Sep 10, 2025 Aug 18, 2025
4 Open Document Open Filing Sep 3, 2025 Aug 29, 2025
3 Open Document Open Filing Aug 27, 2025 Aug 15, 2025
4 Open Document Open Filing Aug 20, 2025 Aug 18, 2025
4 Open Document Open Filing Aug 20, 2025 Aug 18, 2025
4 Open Document Open Filing Aug 20, 2025 Aug 18, 2025
4 Open Document Open Filing Aug 20, 2025 Aug 18, 2025
4 Open Document Open Filing Aug 20, 2025 Aug 18, 2025
144 Open Document Open Filing Aug 18, 2025 001-41855
144 Open Document Open Filing Aug 18, 2025 001-41855
144 Open Document Open Filing Aug 18, 2025 001-41855
144 Open Document Open Filing Aug 18, 2025 001-41855
144 Open Document Open Filing Aug 18, 2025 001-41855
SCHEDULE 13G/A Open Document Open Filing Aug 14, 2025 005-94231
SCHEDULE 13G Open Document Open Filing Aug 14, 2025 005-94231
SCHEDULE 13G/A Open Document Open Filing Aug 14, 2025 005-94231
SCHEDULE 13G/A Open Document Open Filing Aug 14, 2025 005-94231
10-Q Open Document | Data Open Filing 10-Q Aug 14, 2025 Jun 30, 2025 001-41855
8-K Open Document | Data Open Filing 8-K Aug 14, 2025 Aug 14, 2025 001-41855
SCHEDULE 13G Open Document Open Filing Aug 14, 2025 005-94231
SCHEDULE 13G/A Open Document Open Filing Aug 7, 2025 005-94231
424B3 Open Document Open Filing 424B3 Jul 1, 2025 333-288025
EFFECT Open Document Open Filing Jun 30, 2025 333-288025
4 Open Document Open Filing Jun 30, 2025 Jun 26, 2025
4 Open Document Open Filing Jun 30, 2025 Jun 26, 2025
4 Open Document Open Filing Jun 30, 2025 Jun 26, 2025
4 Open Document Open Filing Jun 30, 2025 Jun 26, 2025
4 Open Document Open Filing Jun 30, 2025 Jun 26, 2025
4 Open Document Open Filing Jun 30, 2025 Jun 26, 2025
4 Open Document Open Filing Jun 30, 2025 Jun 26, 2025
8-K Open Document | Data Open Filing 8-K Jun 30, 2025 Jun 30, 2025 001-41855
CORRESP Open Document Open Filing Jun 27, 2025
CORRESP Open Document Open Filing Jun 26, 2025
S-3/A Open Document Open Filing S-3/A Jun 26, 2025 333-288025
UPLOAD Open Document Open Filing Jun 18, 2025 333-288025
S-3 Open Document Open Filing S-3 Jun 13, 2025 333-288025
DEFA14A Open Document Open Filing DEFA14A Jun 5, 2025 001-41855
SCHEDULE 13G Open Document Open Filing Jun 4, 2025 005-94231
SCHEDULE 13G Open Document Open Filing Jun 4, 2025 005-94231
8-K Open Document | Data Open Filing 8-K May 27, 2025 May 27, 2025 001-41855
4 Open Document Open Filing May 20, 2025 May 16, 2025
4 Open Document Open Filing May 20, 2025 May 16, 2025
4 Open Document Open Filing May 20, 2025 May 16, 2025
4 Open Document Open Filing May 20, 2025 May 16, 2025
144 Open Document Open Filing May 16, 2025 001-41855
144 Open Document Open Filing May 16, 2025 001-41855
144 Open Document Open Filing May 16, 2025 001-41855
144 Open Document Open Filing May 16, 2025 001-41855
SCHEDULE 13G/A Open Document Open Filing May 15, 2025 005-94231
10-Q/A Open Document | Data Open Filing 10-Q/A May 15, 2025 Mar 31, 2025 001-41855
SCHEDULE 13G/A Open Document Open Filing May 14, 2025 005-94231
SCHEDULE 13G/A Open Document Open Filing May 13, 2025 005-94231
SCHEDULE 13G/A Open Document Open Filing May 12, 2025 005-94231
10-Q Open Document | Data Open Filing 10-Q May 12, 2025 Mar 31, 2025 001-41855
8-K Open Document | Data Open Filing 8-K May 12, 2025 May 12, 2025 001-41855
ARS Open Document Open Filing ARS Apr 28, 2025 Dec 31, 2024 001-41855
DEFA14A Open Document Open Filing DEFA14A Apr 28, 2025 001-41855
DEF 14A Open Document Open Filing DEF 14A Apr 28, 2025 Dec 31, 2024 001-41855
SCHEDULE 13G Open Document Open Filing Apr 28, 2025 005-94231
4 Open Document Open Filing Apr 9, 2025 Mar 14, 2025
4 Open Document Open Filing Apr 9, 2025 Mar 14, 2025
4 Open Document Open Filing Apr 9, 2025 Mar 14, 2025
8-K Open Document | Data Open Filing 8-K Apr 7, 2025 Apr 7, 2025 001-41855
4 Open Document Open Filing Apr 1, 2025 Mar 14, 2025
S-8 POS Open Document Open Filing S-8 POS Mar 24, 2025 333-286040
424B5 Open Document Open Filing 424B5 Mar 24, 2025 333-283781
S-8 Open Document Open Filing S-8 Mar 24, 2025 333-286040
10-K Open Document | Data Open Filing 10-K Mar 24, 2025 Dec 31, 2024 001-41855
8-K Open Document | Data Open Filing 8-K Mar 24, 2025 Mar 24, 2025 001-41855
4 Open Document Open Filing Feb 21, 2025 Feb 19, 2025
4 Open Document Open Filing Feb 21, 2025 Feb 19, 2025
4 Open Document Open Filing Feb 21, 2025 Feb 19, 2025
4 Open Document Open Filing Feb 21, 2025 Feb 19, 2025
144 Open Document Open Filing Feb 19, 2025 001-41855
144 Open Document Open Filing Feb 19, 2025 001-41855
144 Open Document Open Filing Feb 19, 2025 001-41855
144 Open Document Open Filing Feb 19, 2025 001-41855
SCHEDULE 13G/A Open Document Open Filing Feb 14, 2025 005-94231
SCHEDULE 13G/A Open Document Open Filing Feb 14, 2025 005-94231
SCHEDULE 13G/A Open Document Open Filing Feb 14, 2025 005-94231
SCHEDULE 13G Open Document Open Filing Feb 13, 2025 005-94231
SCHEDULE 13G/A Open Document Open Filing Feb 12, 2025 005-94231
SCHEDULE 13G Open Document Open Filing Feb 4, 2025 005-94231
4 Open Document Open Filing Jan 22, 2025 Jan 17, 2025
8-K Open Document | Data Open Filing 8-K Jan 13, 2025 Jan 13, 2025 001-41855
4 Open Document Open Filing Jan 10, 2025 Jan 7, 2025
4 Open Document Open Filing Jan 10, 2025 Jan 7, 2025
4 Open Document Open Filing Jan 10, 2025 Jan 7, 2025
4 Open Document Open Filing Jan 10, 2025 Jan 7, 2025
4 Open Document Open Filing Jan 10, 2025 Jan 7, 2025
3 Open Document Open Filing Dec 27, 2024 Dec 18, 2024
EFFECT Open Document Open Filing Dec 19, 2024 333-283781
8-K Open Document | Data Open Filing 8-K Dec 19, 2024 Dec 18, 2024 001-41855
CORRESP Open Document Open Filing Dec 17, 2024
UPLOAD Open Document Open Filing Dec 16, 2024 333-283781
S-3 Open Document Open Filing S-3 Dec 13, 2024 333-283781
4 Open Document Open Filing Dec 12, 2024 Dec 10, 2024
144 Open Document Open Filing Dec 10, 2024 001-41855
EFFECT Open Document Open Filing Dec 3, 2024 333-278566
POS AM Open Document Open Filing POS AM Dec 2, 2024 333-278566
4 Open Document Open Filing Nov 26, 2024 Nov 25, 2024
SC 13G/A Open Document Open Filing SC 13G/A Nov 14, 2024 005-94231
SC 13G/A Open Document Open Filing SC 13G/A Nov 14, 2024 005-94231
SC 13G/A Open Document Open Filing JANUS AMENDMENT Nov 14, 2024 005-94231
SC 13G/A Open Document Open Filing SC 13G/A Nov 14, 2024 005-94231
4 Open Document Open Filing Nov 13, 2024 Nov 11, 2024
4 Open Document Open Filing Nov 13, 2024 Nov 11, 2024
3 Open Document Open Filing Nov 13, 2024 Nov 11, 2024
424B3 Open Document Open Filing 424B3 Nov 13, 2024 333-278566
10-Q Open Document | Data Open Filing 10-Q Nov 13, 2024 Sep 30, 2024 001-41855
424B3 Open Document Open Filing 424B3 Nov 13, 2024 333-278566
8-K Open Document | Data Open Filing 8-K Nov 13, 2024 Nov 11, 2024 001-41855
SC 13G Open Document Open Filing LEXEO THERAPEUTICS, INC. Nov 12, 2024 005-94231
424B3 Open Document Open Filing 424B3 Oct 30, 2024 333-278566
8-K Open Document | Data Open Filing 8-K Oct 30, 2024 Oct 30, 2024 001-41855
4 Open Document Open Filing Oct 15, 2024 Oct 10, 2024
424B3 Open Document Open Filing 424B3 Oct 9, 2024 333-278566
8-K Open Document | Data Open Filing 8-K Oct 9, 2024 Oct 9, 2024 001-41855
4 Open Document Open Filing Sep 11, 2024 Sep 10, 2024
144 Open Document Open Filing Sep 10, 2024 001-41855
4 Open Document Open Filing Aug 13, 2024 Aug 12, 2024
424B3 Open Document Open Filing 424B3 Aug 12, 2024 333-278566
10-Q Open Document | Data Open Filing 10-Q Aug 12, 2024 Jun 30, 2024 001-41855
8-K Open Document | Data Open Filing 8-K Aug 12, 2024 Aug 12, 2024 001-41855
SC 13G/A Open Document Open Filing SC 13G Aug 9, 2024 005-94231
SC 13G/A Open Document Open Filing JANUS HENDERSON OWNS LEXEO Aug 5, 2024 005-94231
424B3 Open Document Open Filing 424B3 Jul 15, 2024 333-278566
8-K Open Document | Data Open Filing 8-K Jul 15, 2024 Jul 15, 2024 001-41855
4 Open Document Open Filing Jul 12, 2024 Jul 10, 2024
4 Open Document Open Filing Jul 8, 2024 Jul 5, 2024
3 Open Document Open Filing Jul 8, 2024 Jul 5, 2024
424B3 Open Document Open Filing 424B3 Jul 8, 2024 333-278566
8-K Open Document | Data Open Filing 8-K Jul 8, 2024 Jul 8, 2024 001-41855
424B3 Open Document Open Filing 424B3 Jun 28, 2024 333-278566
8-K Open Document | Data Open Filing 8-K Jun 28, 2024 Jun 28, 2024 001-41855
4 Open Document Open Filing Jun 27, 2024 Jun 25, 2024
4 Open Document Open Filing Jun 27, 2024 Jun 25, 2024
4 Open Document Open Filing Jun 27, 2024 Jun 25, 2024
4 Open Document Open Filing Jun 27, 2024 Jun 25, 2024
4 Open Document Open Filing Jun 27, 2024 Jun 25, 2024
4 Open Document Open Filing 4 Jun 14, 2024 Jun 12, 2024
4 Open Document Open Filing Jun 12, 2024 Jun 10, 2024
3 Open Document Open Filing 3 May 22, 2024 May 20, 2024
4 Open Document Open Filing 4 May 14, 2024 May 13, 2024
144 Open Document Open Filing May 13, 2024 001-41855
424B3 Open Document Open Filing 424B3 May 9, 2024 333-278566
8-K Open Document | Data Open Filing 8-K May 9, 2024 May 9, 2024 001-41855
10-Q Open Document | Data Open Filing 10-Q May 9, 2024 Mar 31, 2024 001-41855
ARS Open Document Open Filing ARS Apr 26, 2024 Dec 31, 2023 001-41855
DEFA14A Open Document Open Filing DEFA14A Apr 26, 2024 001-41855
DEF 14A Open Document Open Filing DEF 14A Apr 26, 2024 Dec 31, 2023 001-41855
424B3 Open Document Open Filing 424B3 Apr 22, 2024 333-278566
424B3 Open Document Open Filing 424B3 Apr 22, 2024 333-278566
8-K Open Document | Data Open Filing 8-K Apr 22, 2024 Apr 22, 2024 001-41855
8-K Open Document | Data Open Filing FORM 8-K Apr 22, 2024 Apr 22, 2024 001-41855
424B3 Open Document Open Filing 424B3 Apr 16, 2024 333-278566
8-K Open Document | Data Open Filing 8-K Apr 16, 2024 Apr 16, 2024 001-41855
EFFECT Open Document Open Filing Apr 12, 2024 333-278566
424B3 Open Document Open Filing 424B3 Apr 12, 2024 333-278566
CORRESP Open Document Open Filing Apr 11, 2024
UPLOAD Open Document Open Filing Apr 11, 2024 333-278566
S-1 Open Document | Data Open Filing S-1 Apr 9, 2024 333-278566
8-K Open Document | Data Open Filing 8-K Mar 11, 2024 Mar 11, 2024 001-41855
S-8 Open Document Open Filing S-8 Mar 11, 2024 333-277816
10-K Open Document | Data Open Filing 10-K Mar 11, 2024 Dec 31, 2023 001-41855
SC 13G/A Open Document Open Filing SC 13G/A Feb 14, 2024 005-94231
SC 13G Open Document Open Filing SC 13G Feb 14, 2024 005-94231
SC 13G Open Document Open Filing SC 13G Feb 14, 2024 005-94231
SC 13G Open Document Open Filing JHG PLZ OWNS >5% Feb 14, 2024 005-94231
SC 13G Open Document Open Filing LEXEO THERAPEUTICS, INC. Feb 14, 2024 005-94231
SC 13G Open Document Open Filing SC 13G Feb 13, 2024 005-94231
3 Open Document Open Filing FORM 3 SUBMISSION Feb 6, 2024 Feb 5, 2024
4 Open Document Open Filing FORM 4 SUBMISSION Feb 6, 2024 Feb 2, 2024
4 Open Document Open Filing FORM 4 SUBMISSION Feb 6, 2024 Feb 2, 2024
4 Open Document Open Filing FORM 4 SUBMISSION Feb 6, 2024 Feb 2, 2024
8-K Open Document | Data Open Filing 8-K Feb 5, 2024 Feb 5, 2024 001-41855
4 Open Document Open Filing 4 Jan 9, 2024 Jan 5, 2024
4 Open Document Open Filing 4 Jan 9, 2024 Jan 5, 2024
8-K Open Document | Data Open Filing 8-K Dec 18, 2023 Dec 18, 2023 001-41855
SC 13G/A Open Document Open Filing SC 13G/A Dec 15, 2023 005-94231
SC 13G Open Document Open Filing SC 13G Dec 11, 2023 005-94231
8-K Open Document | Data Open Filing 8-K Dec 11, 2023 Dec 11, 2023 001-41855
10-Q Open Document | Data Open Filing 10-Q Dec 11, 2023 Sep 30, 2023 001-41855
SC 13G Open Document Open Filing SC 13G Nov 24, 2023 005-94231
SC 13G Open Document Open Filing SC 13G Nov 17, 2023 005-94231
4 Open Document Open Filing FORM 4 SUBMISSION Nov 9, 2023 Nov 7, 2023
4 Open Document Open Filing FORM 4 SUBMISSION Nov 9, 2023 Nov 7, 2023
4 Open Document Open Filing FORM 4 SUBMISSION Nov 9, 2023 Nov 7, 2023
4 Open Document Open Filing FORM 4 SUBMISSION Nov 9, 2023 Nov 7, 2023
S-8 Open Document Open Filing S-8 Nov 7, 2023 333-275374
8-K Open Document Open Filing 8-K Nov 7, 2023 Nov 7, 2023 001-41855
SEC STAFF LETTER Open Document Open Filing Nov 6, 2023
424B4 Open Document Open Filing 424B4 Nov 6, 2023 333-274777
FWP Open Document Open Filing FWP Nov 3, 2023 333-274777
EFFECT Open Document Open Filing Nov 2, 2023 333-274777
3 Open Document Open Filing FORM 3 SUBMISSION Nov 2, 2023 Nov 2, 2023
3 Open Document Open Filing FORM 3 SUBMISSION Nov 2, 2023 Nov 2, 2023
3 Open Document Open Filing FORM 3 SUBMISSION Nov 2, 2023 Nov 2, 2023
3 Open Document Open Filing FORM 3 SUBMISSION Nov 2, 2023 Nov 2, 2023
3 Open Document Open Filing FORM 3 SUBMISSION Nov 2, 2023 Nov 2, 2023
3 Open Document Open Filing FORM 3 SUBMISSION Nov 2, 2023 Nov 2, 2023
3 Open Document Open Filing FORM 3 SUBMISSION Nov 2, 2023 Nov 2, 2023
3 Open Document Open Filing FORM 3 SUBMISSION Nov 2, 2023 Nov 2, 2023
3 Open Document Open Filing FORM 3 SUBMISSION Nov 2, 2023 Nov 2, 2023
3 Open Document Open Filing FORM 3 SUBMISSION Nov 2, 2023 Nov 2, 2023
3 Open Document Open Filing FORM 3 SUBMISSION Nov 2, 2023 Nov 2, 2023
3 Open Document Open Filing FORM 3 SUBMISSION Nov 2, 2023 Nov 2, 2023
3 Open Document Open Filing FORM 3 SUBMISSION Nov 2, 2023 Nov 2, 2023
CERT Open Document Open Filing Nov 2, 2023 001-41855
CORRESP Open Document Open Filing Nov 1, 2023
S-1/A Open Document Open Filing S-1/A Nov 1, 2023 333-274777
8-A12B Open Document Open Filing 8-A12B Nov 1, 2023 001-41855
UPLOAD Open Document Open Filing Nov 1, 2023
CORRESP Open Document Open Filing Oct 31, 2023
CORRESP Open Document Open Filing Oct 31, 2023
S-1/A Open Document Open Filing S-1/A Oct 30, 2023 333-274777
CORRESP Open Document Open Filing Oct 5, 2023
S-1 Open Document Open Filing S-1 Sep 29, 2023 333-274777
SEC STAFF LETTER Open Document Open Filing Sep 19, 2023
DRSLTR Open Document Open Filing Sep 18, 2023
DRS/A Open Document Open Filing Sep 18, 2023 377-05985
UPLOAD Open Document Open Filing Aug 18, 2023
DRS/A Open Document Open Filing Aug 16, 2023 377-05985
DRSLTR Open Document Open Filing Aug 15, 2023
UPLOAD Open Document Open Filing Jun 13, 2023
DRSLTR Open Document Open Filing May 17, 2023
DRS/A Open Document Open Filing May 17, 2023 377-05985
UPLOAD Open Document Open Filing May 17, 2022
DRSLTR Open Document Open Filing May 5, 2022
DRS/A Open Document Open Filing May 5, 2022 377-05985
UPLOAD Open Document Open Filing Mar 3, 2022
DRS Open Document Open Filing Feb 4, 2022 377-05985