Spero Therapeutics, Inc. SEC EDGAR Filings (CIK 0001701108)

SEC EDGAR filings, ownership reports, and insider transactions for Spero Therapeutics, Inc..

Symbol
SPRO on Nasdaq
Industry
Pharmaceutical Preparations (Office Of Life Sciences)
Business address
675 Massachusetts Avenue, 14 Th Floor, Cambridge, MA, 02139
State of incorporation
DE
Fiscal year end
31 December
Former names
Spero Therapeutics, LLC (to 21 Mar 2017)
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Spero Therapeutics, Inc. has filed 481 SEC EDGAR filings since 21 Mar 2017

Latest Filings

Recent SEC filings for Spero Therapeutics, Inc. including 8-K, 10-Q, 4 and more.

Form type Document Filing Description Filing date Reporting date File number(s)
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 19 Dec 2025 19 Dec 2025 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 13 Nov 2025 13 Nov 2025 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 13 Nov 2025 30 Sep 2025 001-38266
4 Open 4 document View SEC filing for 4 4 12 Nov 2025 07 Nov 2025
4 Open 4 document View SEC filing for 4 4 03 Sep 2025 28 Aug 2025
4 Open 4 document View SEC filing for 4 4 03 Sep 2025 28 Aug 2025
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 14 Aug 2025 005-90168
S-8 Open S-8 document | Open XBRL data View SEC filing for S-8 S-8 12 Aug 2025 333-289544
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 12 Aug 2025 30 Jun 2025 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 12 Aug 2025 12 Aug 2025 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 18 Jun 2025 12 Jun 2025 001-38266
4 Open 4 document View SEC filing for 4 4 16 Jun 2025 12 Jun 2025
4 Open 4 document View SEC filing for 4 4 16 Jun 2025 12 Jun 2025
4 Open 4 document View SEC filing for 4 4 16 Jun 2025 12 Jun 2025
4 Open 4 document View SEC filing for 4 4 16 Jun 2025 12 Jun 2025
4 Open 4 document View SEC filing for 4 4 16 Jun 2025 12 Jun 2025
4 Open 4 document View SEC filing for 4 4 16 Jun 2025 12 Jun 2025
4 Open 4 document View SEC filing for 4 4 16 Jun 2025 12 Jun 2025
4 Open 4 document View SEC filing for 4 4 16 Jun 2025 12 Jun 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 May 2025 28 May 2025 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 13 May 2025 13 May 2025 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 13 May 2025 31 Mar 2025 001-38266
4 Open 4 document View SEC filing for 4 4 06 May 2025 02 May 2025
ARS Open ARS document View SEC filing for ARS ARS 28 Apr 2025 31 Dec 2024 001-38266
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 28 Apr 2025 001-38266
DEF 14A Open DEF 14A document | Open XBRL data View SEC filing for DEF 14A DEF 14A 28 Apr 2025 12 Jun 2025 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Apr 2025 22 Apr 2025 001-38266
SCHEDULE 13D/A Open SCHEDULE 13D/A document View SEC filing for SCHEDULE 13D/A 28 Mar 2025 005-90168
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Mar 2025 27 Mar 2025 001-38266
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 27 Mar 2025 31 Dec 2024 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Feb 2025 25 Feb 2025 001-38266
4 Open 4 document View SEC filing for 4 4 05 Feb 2025 03 Feb 2025
4 Open 4 document View SEC filing for 4 4 05 Feb 2025 03 Feb 2025
4 Open 4 document View SEC filing for 4 4 05 Feb 2025 03 Feb 2025
4 Open 4 document View SEC filing for 4 4 05 Feb 2025 05 Feb 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 10 Jan 2025 07 Jan 2025 001-38266
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Nov 2024 005-90168
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 14 Nov 2024 14 Nov 2024 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 14 Nov 2024 30 Sep 2024 001-38266
4 Open 4 document View SEC filing for 4 4 12 Nov 2024 07 Nov 2024
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 29 Oct 2024 29 Oct 2024 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 10 Sep 2024 09 Sep 2024 001-38266
4 Open 4 document View SEC filing for 4 4 29 Aug 2024 27 Aug 2024
4 Open 4 document View SEC filing for 4 4 29 Aug 2024 27 Aug 2024
4 Open 4 document View SEC filing for 4 4 29 Aug 2024 27 Aug 2024
4 Open 4 document View SEC filing for 4 4 06 Aug 2024 02 Aug 2024
S-8 Open S-8 document View SEC filing for S-8 S-8 05 Aug 2024 333-281245
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 05 Aug 2024 30 Jun 2024 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Aug 2024 05 Aug 2024 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 03 Jun 2024 29 May 2024 001-38266
4 Open 4 document View SEC filing for 4 4 30 May 2024 29 May 2024
4 Open 4 document View SEC filing for 4 4 30 May 2024 29 May 2024
4 Open 4 document View SEC filing for 4 4 30 May 2024 29 May 2024
4 Open 4 document View SEC filing for 4 4 30 May 2024 29 May 2024
4 Open 4 document View SEC filing for 4 4 30 May 2024 29 May 2024
4 Open 4 document View SEC filing for 4 4 30 May 2024 29 May 2024
4 Open 4 document View SEC filing for 4 4 30 May 2024 29 May 2024
4 Open 4 document View SEC filing for 4 4 30 May 2024 29 May 2024
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 15 May 2024 15 May 2024 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 15 May 2024 31 Mar 2024 001-38266
ARS Open ARS document View SEC filing for ARS ARS 16 Apr 2024 31 Dec 2023 001-38266
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 16 Apr 2024 001-38266
DEF 14A Open DEF 14A document | Open XBRL data View SEC filing for DEF 14A DEF 14A 16 Apr 2024 29 May 2024 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 29 Mar 2024 29 Mar 2024 001-38266
EFFECT Open EFFECT document View SEC filing for EFFECT 22 Mar 2024 333-277998
CORRESP Open CORRESP document View SEC filing for CORRESP 20 Mar 2024
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 20 Mar 2024 333-277998
S-3 Open S-3 document View SEC filing for S-3 S-3 15 Mar 2024 333-277998
S-8 Open S-8 document View SEC filing for S-8 S-8 15 Mar 2024 333-277984
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 13 Mar 2024 31 Dec 2023 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 13 Mar 2024 13 Mar 2024 001-38266
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 14 Feb 2024 005-90168
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 09 Feb 2024 05 Feb 2024 001-38266
4 Open 4 document View SEC filing for 4 4 05 Feb 2024 01 Feb 2024
4 Open 4 document View SEC filing for 4 4 05 Feb 2024 02 Feb 2024
4 Open 4 document View SEC filing for 4 4 05 Feb 2024 01 Feb 2024
4 Open 4 document View SEC filing for 4 4 05 Feb 2024 01 Feb 2024
4 Open 4 document View SEC filing for 4 4 05 Feb 2024 01 Feb 2024
4 Open 4 document View SEC filing for 4 4 05 Feb 2024 01 Feb 2024
144 Open 144 document View SEC filing for 144 05 Feb 2024 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 08 Jan 2024 08 Jan 2024 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Jan 2024 05 Jan 2024 001-38266
4 Open 4 document View SEC filing for 4 4 04 Jan 2024 02 Jan 2024
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 02 Jan 2024 02 Jan 2024 001-38266
4 Open 4 document View SEC filing for 4 4 15 Nov 2023 13 Nov 2023
3 Open 3 document View SEC filing for 3 3 15 Nov 2023 06 Nov 2023
S-8 Open S-8 document View SEC filing for S-8 S-8 13 Nov 2023 333-275515
S-8 Open S-8 document View SEC filing for S-8 S-8 13 Nov 2023 333-275514
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 13 Nov 2023 13 Nov 2023 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 13 Nov 2023 30 Sep 2023 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Nov 2023 30 Oct 2023 001-38266
8-K/A Open 8-K/A document | Open XBRL data View SEC filing for 8-K/A 8-K/A 16 Oct 2023 05 Oct 2023 001-38266
4 Open 4 document View SEC filing for 4 4 10 Oct 2023 05 Oct 2023
4 Open 4 document View SEC filing for 4 4 10 Oct 2023 05 Oct 2023
4 Open 4 document View SEC filing for 4 4 10 Oct 2023 05 Oct 2023
4 Open 4 document View SEC filing for 4 4 10 Oct 2023 05 Oct 2023
4 Open 4 document View SEC filing for 4 4 10 Oct 2023 05 Oct 2023
4 Open 4 document View SEC filing for 4 4 10 Oct 2023 05 Oct 2023
4 Open 4 document View SEC filing for 4 4 10 Oct 2023 05 Oct 2023
4 Open 4 document View SEC filing for 4 4 10 Oct 2023 05 Oct 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 10 Oct 2023 05 Oct 2023 001-38266
4 Open 4 document View SEC filing for 4 4 15 Sep 2023 13 Sep 2023
ARS Open ARS document View SEC filing for ARS ARS 01 Sep 2023 31 Dec 2022 001-38266
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 01 Sep 2023 05 Oct 2023 001-38266
4 Open 4 document View SEC filing for 4 4 30 Aug 2023 28 Aug 2023
4 Open 4 document View SEC filing for 4 4 30 Aug 2023 28 Aug 2023
4 Open 4 document View SEC filing for 4 4 30 Aug 2023 28 Aug 2023
4 Open 4 document View SEC filing for 4 4 30 Aug 2023 28 Aug 2023
144 Open 144 document View SEC filing for 144 29 Aug 2023 001-38266
PRE 14A Open PRE 14A document View SEC filing for PRE 14A PRE 14A 22 Aug 2023 05 Oct 2023 001-38266
S-8 Open S-8 document View SEC filing for S-8 S-8 10 Aug 2023 333-273880
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 10 Aug 2023 10 Aug 2023 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 10 Aug 2023 30 Jun 2023 001-38266
4 Open 4 document View SEC filing for 4 4 03 Aug 2023 01 Aug 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 31 Jul 2023 31 Jul 2023 001-38266
3 Open 3 document View SEC filing for 3 3 24 Jul 2023 15 Jul 2023
4 Open 4 document View SEC filing for 4 4 14 Jun 2023 12 Jun 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 14 Jun 2023 12 Jun 2023 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 11 May 2023 11 May 2023 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 11 May 2023 31 Mar 2023 001-38266
S-8 Open S-8 document View SEC filing for S-8 S-8 30 Mar 2023 333-271000
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 30 Mar 2023 30 Mar 2023 001-38266
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 30 Mar 2023 31 Dec 2022 001-38266
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 5 TO THE SCHEDULE 13G 14 Feb 2023 005-90168
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2023 005-90168
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Feb 2023 03 Feb 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2023 01 Feb 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2023 01 Feb 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2023 01 Feb 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2023 01 Feb 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2023 01 Feb 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Feb 2023 30 Jan 2023 001-38266
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SCHEDULE 13D/A 20 Jan 2023 005-90168
CT ORDER Open CT ORDER document View SEC filing for CT ORDER 19 Jan 2023 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 09 Jan 2023 09 Jan 2023 001-38266
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jan 2023 03 Jan 2023
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jan 2023 03 Jan 2023
D Open D document View SEC filing for D 15 Nov 2022 021-464777
3 Open 3 document View SEC filing for 3 14 Nov 2022 07 Nov 2022
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SCHEDULE 13D/A 14 Nov 2022 005-90168
S-8 Open S-8 document View SEC filing for S-8 S-8 14 Nov 2022 333-268344
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 14 Nov 2022 14 Nov 2022 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 14 Nov 2022 30 Sep 2022 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 08 Nov 2022 08 Nov 2022 001-38266
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 03 Oct 2022 005-90168
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 26 Sep 2022 22 Sep 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 22 Sep 2022 21 Sep 2022 001-38266
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Sep 2022 15 Sep 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Sep 2022 15 Sep 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Sep 2022 15 Sep 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Sep 2022 15 Sep 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Sep 2022 15 Sep 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Sep 2022 15 Sep 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Sep 2022 15 Sep 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 19 Sep 2022 15 Sep 2022 001-38266
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 14 Sep 2022 12 Sep 2022
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 14 Sep 2022 12 Sep 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 06 Sep 2022 06 Sep 2022 001-38266
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 30 Aug 2022 29 Aug 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 10 Aug 2022 10 Aug 2022 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 10 Aug 2022 30 Jun 2022 001-38266
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 05 Aug 2022 001-38266
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 05 Aug 2022 15 Sep 2022 001-38266
SC 13G Open SC 13G document View SEC filing for SC 13G 08 Jul 2022 005-90168
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Jul 2022 01 Jul 2022 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 27 Jun 2022 27 Jun 2022 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 07 Jun 2022 07 Jun 2022 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 16 May 2022 16 May 2022 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 16 May 2022 31 Mar 2022 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 03 May 2022 03 May 2022 001-38266
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 28 Apr 2022 26 Apr 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 07 Apr 2022 06 Apr 2022 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 31 Mar 2022 31 Mar 2022 001-38266
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 31 Mar 2022 31 Dec 2021 001-38266
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 31 Mar 2022 30 Mar 2022
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 16 Mar 2022 14 Mar 2022
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 09 Mar 2022 005-90168
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 02 Mar 2022 28 Feb 2022
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 23 Feb 2022 18 Feb 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 16 Feb 2022 16 Feb 2022 001-38266
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2022 005-90168
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 4 TO THE SCHEDULE 13G 14 Feb 2022 005-90168
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 03 Feb 2022 005-90168
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2022 01 Feb 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2022 01 Feb 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2022 01 Feb 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2022 01 Feb 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2022 01 Feb 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2022 01 Feb 2022
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 01 Feb 2022 31 Jan 2022
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 26 Jan 2022 24 Jan 2022
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SCHEDULE 13G/A 25 Jan 2022 005-90168
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 25 Jan 2022 25 Jan 2022 001-38266
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 20 Jan 2022 18 Jan 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 19 Jan 2022 19 Jan 2022 001-38266
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 12 Jan 2022 10 Jan 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 07 Jan 2022 05 Jan 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 07 Jan 2022 05 Jan 2022
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 07 Jan 2022 05 Jan 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 04 Jan 2022 03 Jan 2022 001-38266
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 03 Jan 2022 29 Dec 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 29 Dec 2021 27 Dec 2021
CT ORDER Open CT ORDER document View SEC filing for CT ORDER 16 Dec 2021 001-38266
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 12 Nov 2021 11 Nov 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 10 Nov 2021 10 Nov 2021 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 10 Nov 2021 30 Sep 2021 001-38266
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 02 Nov 2021 29 Oct 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Oct 2021 27 Oct 2021 001-38266
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 14 Oct 2021 11 Oct 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 12 Oct 2021 11 Oct 2021 001-38266
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 04 Oct 2021 30 Sep 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 30 Sep 2021 29 Sep 2021 001-38266
S-8 Open S-8 document View SEC filing for S-8 S-8 20 Sep 2021 333-259662
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A AMENDMENT TO FORM SC 13D 16 Sep 2021 005-90168
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 15 Sep 2021 13 Sep 2021
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 10 Sep 2021 09 Sep 2021
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 01 Sep 2021 30 Aug 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 30 Aug 2021 26 Aug 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 30 Aug 2021 26 Aug 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 30 Aug 2021 26 Aug 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 30 Aug 2021 26 Aug 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 30 Aug 2021 26 Aug 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 30 Aug 2021 26 Aug 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 30 Aug 2021 26 Aug 2021 001-38266
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 27 Aug 2021 26 Aug 2021
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 24 Aug 2021 20 Aug 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Aug 2021 17 Aug 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Aug 2021 17 Aug 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Aug 2021 17 Aug 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Aug 2021 17 Aug 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Aug 2021 17 Aug 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Aug 2021 17 Aug 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 18 Aug 2021 17 Aug 2021 001-38266
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Aug 2021 17 Aug 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Aug 2021 05 Aug 2021 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 05 Aug 2021 30 Jun 2021 001-38266
D Open D document View SEC filing for D 14 Jul 2021 021-406258
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G SPERO THERAPEUTICS, INC. 09 Jul 2021 005-90168
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 06 Jul 2021 17 Aug 2021 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 01 Jul 2021 30 Jun 2021 001-38266
PRE 14A Open PRE 14A document View SEC filing for PRE 14A PRE 14A 25 Jun 2021 17 Aug 2021 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 06 May 2021 06 May 2021 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q Q1 2021 06 May 2021 31 Mar 2021 001-38266
EFFECT Open EFFECT document View SEC filing for EFFECT 29 Mar 2021 333-254170
CORRESP Open CORRESP document View SEC filing for CORRESP 24 Mar 2021
10-K/A Open 10-K/A document View SEC filing for 10-K/A 10-K/A 23 Mar 2021 31 Dec 2020 001-38266
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 17 Mar 2021
S-8 Open S-8 document View SEC filing for S-8 S-8 11 Mar 2021 333-254173
S-3 Open S-3 document View SEC filing for S-3 S-3 11 Mar 2021 333-254170
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 11 Mar 2021 11 Mar 2021 001-38266
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 11 Mar 2021 31 Dec 2020 001-38266
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A AMENDED ACQUISITION OF BENEFICIAL OWNERSHIP 16 Feb 2021 005-90168
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 16 Feb 2021 005-90168
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 3 TO THE SCHEDULE 13G 16 Feb 2021 005-90168
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 10 Feb 2021 005-90168
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 10 Feb 2021 08 Feb 2021
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Feb 2021 05 Feb 2021 001-38266
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 04 Feb 2021 01 Feb 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2021 01 Feb 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2021 01 Feb 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2021 01 Feb 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2021 01 Feb 2021
SC 13G Open SC 13G document View SEC filing for SC 13G 02 Feb 2021 005-90168
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 02 Feb 2021 005-90168
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 19 Jan 2021 15 Jan 2021 001-38266
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jan 2021 04 Jan 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jan 2021 04 Jan 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jan 2021 04 Jan 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jan 2021 04 Jan 2021
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jan 2021 04 Jan 2021
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 05 Jan 2021 04 Jan 2021
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Dec 2020 16 Dec 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Dec 2020 16 Dec 2020
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 17 Dec 2020 09 Dec 2020 001-38266
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A AMENDMENT NO. 5 TO SC 13D 07 Dec 2020 005-90168
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 03 Dec 2020 03 Dec 2020 001-38266
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 02 Dec 2020 02 Dec 2020
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 02 Dec 2020 02 Dec 2020
424B5 Open 424B5 document View SEC filing for 424B5 424B5 13 Nov 2020 333-228661
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 10 Nov 2020 09 Nov 2020
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 06 Nov 2020 04 Nov 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Nov 2020 03 Nov 2020
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 05 Nov 2020 05 Nov 2020 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 05 Nov 2020 30 Sep 2020 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 28 Oct 2020 27 Oct 2020 001-38266
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 27 Oct 2020 27 Oct 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 27 Oct 2020 27 Oct 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 27 Oct 2020 27 Oct 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 27 Oct 2020 27 Oct 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 27 Oct 2020 27 Oct 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 27 Oct 2020 23 Oct 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 27 Oct 2020 27 Oct 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 27 Oct 2020 27 Oct 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 15 Oct 2020 13 Oct 2020
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 30 Sep 2020 27 Oct 2020 001-38266
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 23 Sep 2020 005-90168
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 22 Sep 2020 11 Sep 2020
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 16 Sep 2020 16 Sep 2020 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 14 Sep 2020 10 Sep 2020 001-38266
424B5 Open 424B5 document View SEC filing for 424B5 424B5 14 Sep 2020 333-228661
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 10 Sep 2020 08 Sep 2020
424B5 Open 424B5 document View SEC filing for 424B5 424B5 09 Sep 2020 333-228661
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 09 Sep 2020 09 Sep 2020 001-38266
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 08 Sep 2020 08 Sep 2020 001-38266
S-8 Open S-8 document View SEC filing for S-8 S-8 06 Aug 2020 333-241681
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K 8-K 06 Aug 2020 06 Aug 2020 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 06 Aug 2020 30 Jun 2020 001-38266
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 09 Jul 2020 07 Jul 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 29 Jun 2020 22 Jun 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 23 Jun 2020 23 Jun 2020
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A AMENDMENT TO FORM SC 13D 04 Jun 2020 005-90168
8-K Open 8-K document View SEC filing for 8-K 8-K 04 Jun 2020 04 Jun 2020 001-38266
8-K/A Open 8-K/A document View SEC filing for 8-K/A 8-K/A 11 May 2020 16 Apr 2020 001-38266
8-K Open 8-K document View SEC filing for 8-K 8-K 08 May 2020 08 May 2020 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 08 May 2020 31 Mar 2020 001-38266
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 23 Apr 2020 16 Apr 2020
8-K Open 8-K document View SEC filing for 8-K 8-K 16 Apr 2020 16 Apr 2020 001-38266
S-8 Open S-8 document View SEC filing for S-8 S-8 19 Mar 2020 333-237283
8-K Open 8-K document View SEC filing for 8-K 8-K 16 Mar 2020 16 Mar 2020 001-38266
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 16 Mar 2020 31 Dec 2019 001-38266
8-K Open 8-K document View SEC filing for 8-K 8-K 28 Feb 2020 28 Feb 2020 001-38266
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 2 TO THE SCHEDULE 13G 18 Feb 2020 005-90168
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A AMENDMENT TO FORM SC 13D 14 Feb 2020 005-90168
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2020 005-90168
8-K Open 8-K document View SEC filing for 8-K 8-K 11 Feb 2020 11 Feb 2020 001-38266
424B5 Open 424B5 document View SEC filing for 424B5 424B5 11 Feb 2020 333-228661
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SCHEDULE 13G/A 04 Feb 2020 005-90168
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2020 03 Feb 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2020 03 Feb 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2020 03 Feb 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 03 Feb 2020 03 Feb 2020
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 31 Jan 2020 005-90168
8-K Open 8-K document View SEC filing for 8-K 8-K 30 Jan 2020 30 Jan 2020 001-38266
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 13 Jan 2020 01 Jan 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jan 2020 02 Jan 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jan 2020 02 Jan 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jan 2020 02 Jan 2020
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jan 2020 02 Jan 2020
8-K Open 8-K document View SEC filing for 8-K 8-K 19 Dec 2019 16 Dec 2019 001-38266
8-K Open 8-K document View SEC filing for 8-K 8-K 05 Dec 2019 05 Dec 2019 001-38266
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 08 Nov 2019 08 Nov 2019
8-K Open 8-K document View SEC filing for 8-K 8-K 04 Nov 2019 04 Nov 2019 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 04 Nov 2019 30 Sep 2019 001-38266
8-K Open 8-K document View SEC filing for 8-K 8-K 03 Oct 2019 03 Oct 2019 001-38266
8-K Open 8-K document View SEC filing for 8-K 8-K 06 Sep 2019 04 Sep 2019 001-38266
8-K Open 8-K document View SEC filing for 8-K 8-K 08 Aug 2019 08 Aug 2019 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 08 Aug 2019 30 Jun 2019 001-38266
424B5 Open 424B5 document View SEC filing for 424B5 424B5 14 Jun 2019 333-228661
8-K Open 8-K document View SEC filing for 8-K 8-K 13 Jun 2019 12 Jun 2019 001-38266
8-K Open 8-K document View SEC filing for 8-K 8-K 06 Jun 2019 05 Jun 2019 001-38266
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jun 2019 05 Jun 2019
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jun 2019 05 Jun 2019
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jun 2019 05 Jun 2019
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jun 2019 05 Jun 2019
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jun 2019 05 Jun 2019
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jun 2019 05 Jun 2019
8-K Open 8-K document View SEC filing for 8-K 8-K 09 May 2019 09 May 2019 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 09 May 2019 31 Mar 2019 001-38266
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 26 Apr 2019 05 Jun 2019 001-38266
8-K Open 8-K document View SEC filing for 8-K 8-K 18 Apr 2019 18 Apr 2019 001-38266
CT ORDER Open CT ORDER document View SEC filing for CT ORDER 01 Apr 2019 001-38266
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 29 Mar 2019 29 Mar 2019
8-K/A Open 8-K/A document View SEC filing for 8-K/A FORM 8-K/A 29 Mar 2019 19 Mar 2019 001-38266
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 19 Mar 2019 19 Mar 2019
8-K Open 8-K document View SEC filing for 8-K 8-K 19 Mar 2019 19 Mar 2019 001-38266
S-8 Open S-8 document View SEC filing for S-8 S-8 14 Mar 2019 333-230283
S-8 Open S-8 document View SEC filing for S-8 S-8 14 Mar 2019 333-230281
8-K Open 8-K document View SEC filing for 8-K 8-K 14 Mar 2019 14 Mar 2019 001-38266
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 14 Mar 2019 31 Dec 2018 001-38266
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Feb 2019 005-90168
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 1 TO THE SCHEDULE 13G 14 Feb 2019 005-90168
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 14 Feb 2019 005-90168
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 13 Feb 2019 005-90168
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 08 Feb 2019 005-90168
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 07 Jan 2019 04 Jan 2019 001-38266
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 02 Jan 2019 02 Jan 2019
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 02 Jan 2019 02 Jan 2019
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 02 Jan 2019 02 Jan 2019
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 02 Jan 2019 02 Jan 2019
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 02 Jan 2019 02 Jan 2019
EFFECT Open EFFECT document View SEC filing for EFFECT 11 Dec 2018 333-228661
CT ORDER Open CT ORDER document View SEC filing for CT ORDER 11 Dec 2018 001-38266
CORRESP Open CORRESP document View SEC filing for CORRESP 07 Dec 2018
S-3 Open S-3 document View SEC filing for S-3 S-3 03 Dec 2018 333-228661
8-K Open 8-K document View SEC filing for 8-K 8-K 16 Nov 2018 15 Nov 2018 001-38266
8-K Open 8-K document View SEC filing for 8-K 8-K 13 Nov 2018 13 Nov 2018 001-38266
8-K Open 8-K document View SEC filing for 8-K 8-K 08 Nov 2018 08 Nov 2018 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 08 Nov 2018 30 Sep 2018 001-38266
8-K Open 8-K document View SEC filing for 8-K 8-K 27 Sep 2018 27 Sep 2018 001-38266
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 21 Sep 2018 21 Sep 2018
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 21 Sep 2018 21 Sep 2018
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A 19 Sep 2018 005-90168
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 14 Aug 2018 14 Aug 2018 001-38266
8-K Open 8-K document View SEC filing for 8-K 8-K 09 Aug 2018 09 Aug 2018 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 09 Aug 2018 30 Jun 2018 001-38266
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 17 Jul 2018 17 Jul 2018
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A 17 Jul 2018 005-90168
8-K Open 8-K document View SEC filing for 8-K 8-K 17 Jul 2018 17 Jul 2018 001-38266
8-K Open 8-K document View SEC filing for 8-K 8-K 16 Jul 2018 16 Jul 2018 001-38266
424B4 Open 424B4 document View SEC filing for 424B4 424B4 13 Jul 2018 333-226093
EFFECT Open EFFECT document View SEC filing for EFFECT 12 Jul 2018 333-226093
S-1/A Open S-1/A document View SEC filing for S-1/A S-1/A 11 Jul 2018 333-226093
8-K Open 8-K document View SEC filing for 8-K 8-K 09 Jul 2018 09 Jul 2018 001-38266
S-1 Open S-1 document | Open XBRL data View SEC filing for S-1 S-1 09 Jul 2018 333-226093
8-K Open 8-K document View SEC filing for 8-K 8-K 09 Jul 2018 09 Jul 2018 001-38266
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jul 2018 05 Jul 2018
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jul 2018 05 Jul 2018
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jul 2018 05 Jul 2018
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 08 Jun 2018 05 Jun 2018 001-38266
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jun 2018 05 Jun 2018
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jun 2018 05 Jun 2018
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jun 2018 05 Jun 2018
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jun 2018 05 Jun 2018
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jun 2018 05 Jun 2018
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 06 Jun 2018 05 Jun 2018
DRS Open DRS document View SEC filing for DRS 25 May 2018 377-02085
8-K Open 8-K document View SEC filing for 8-K 8-K 10 May 2018 10 May 2018 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q SPERO THERAPEUTICS, INC. Q1 2018 10-Q 10 May 2018 31 Mar 2018 001-38266
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF14A 27 Apr 2018 05 Jun 2018 001-38266
8-K Open 8-K document View SEC filing for 8-K 8-K 02 Apr 2018 02 Apr 2018 001-38266
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 02 Apr 2018 31 Dec 2017 001-38266
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 30 Mar 2018 30 Mar 2018
SC 13D Open SC 13D document View SEC filing for SC 13D SC 13D 14 Mar 2018 005-90168
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 14 Feb 2018 005-90168
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 14 Feb 2018 005-90168
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 14 Feb 2018 005-90168
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 13 Feb 2018 005-90168
SC 13G Open SC 13G document View SEC filing for SC 13G 13 Feb 2018 005-90168
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 06 Feb 2018 01 Feb 2018
8-K Open 8-K document View SEC filing for 8-K 8-K 01 Feb 2018 01 Feb 2018 001-38266
8-K Open 8-K document View SEC filing for 8-K 8-K 23 Jan 2018 17 Jan 2018 001-38266
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jan 2018 04 Jan 2018
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 05 Jan 2018 04 Jan 2018
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 15 Dec 2017 13 Dec 2017
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 15 Dec 2017 13 Dec 2017
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 15 Dec 2017 13 Dec 2017
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 15 Dec 2017 13 Dec 2017
S-8 Open S-8 document View SEC filing for S-8 FORM S-8 14 Dec 2017 333-222060
8-K Open 8-K document View SEC filing for 8-K 8-K 14 Dec 2017 14 Dec 2017 001-38266
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 14 Dec 2017 30 Sep 2017 001-38266
SC 13D Open SC 13D document View SEC filing for SC 13D 16 Nov 2017 005-90168
SC 13G Open SC 13G document View SEC filing for SC 13G 15 Nov 2017 005-90168
SC 13G Open SC 13G document View SEC filing for SC 13G THE SCHEDULE 13G 09 Nov 2017 005-90168
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 07 Nov 2017 06 Nov 2017
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 07 Nov 2017 06 Nov 2017
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 07 Nov 2017 06 Nov 2017
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 07 Nov 2017 06 Nov 2017
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 07 Nov 2017 06 Nov 2017
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 07 Nov 2017 06 Nov 2017
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 06 Nov 2017 06 Nov 2017 001-38266
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 06 Nov 2017
424B4 Open 424B4 document View SEC filing for 424B4 424B4 02 Nov 2017 333-220858
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 02 Nov 2017 01 Nov 2017
EFFECT Open EFFECT document View SEC filing for EFFECT 01 Nov 2017 333-220858
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 01 Nov 2017 01 Nov 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 01 Nov 2017 01 Nov 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 01 Nov 2017 01 Nov 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 01 Nov 2017 01 Nov 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 01 Nov 2017 01 Nov 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 01 Nov 2017 01 Nov 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 01 Nov 2017 01 Nov 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 01 Nov 2017 01 Nov 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 01 Nov 2017 01 Nov 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 01 Nov 2017 01 Nov 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 01 Nov 2017 01 Nov 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 01 Nov 2017 01 Nov 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 01 Nov 2017 01 Nov 2017
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 01 Nov 2017 01 Nov 2017
CERTNAS Open CERTNAS document View SEC filing for CERTNAS AUTO-GENERATED PAPER DOCUMENT 01 Nov 2017 001-38266
CT ORDER Open CT ORDER document View SEC filing for CT ORDER 01 Nov 2017 333-220858
CORRESP Open CORRESP document View SEC filing for CORRESP 30 Oct 2017
CORRESP Open CORRESP document View SEC filing for CORRESP 30 Oct 2017
8-A12B Open 8-A12B document View SEC filing for 8-A12B 8-A12B 30 Oct 2017 001-38266
S-1/A Open S-1/A document View SEC filing for S-1/A S-1/A 23 Oct 2017 333-220858
CORRESP Open CORRESP document View SEC filing for CORRESP 12 Oct 2017
S-1 Open S-1 document View SEC filing for S-1 S-1 06 Oct 2017 333-220858
DRSLTR Open DRSLTR document View SEC filing for DRSLTR 29 Sep 2017
DRS/A Open DRS/A document View SEC filing for DRS/A 29 Sep 2017 377-01690
DRS/A Open DRS/A document View SEC filing for DRS/A 22 Sep 2017 377-01690
DRS Open DRS document View SEC filing for DRS 25 Aug 2017 377-01690
D Open D document View SEC filing for D 21 Mar 2017 021-283010

About this filer

Spero Therapeutics, Inc. files with the SEC under CIK 0001701108. This page aggregates EDGAR filings and related ownership activity.

Industry: Pharmaceutical Preparations.

See insider transactions for this issuer.

FAQ

What is a CIK?
A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
Why are some filings missing?
New filings appear as the SEC updates EDGAR, and older records can vary by availability.
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Updates follow new EDGAR submissions and periodic data refreshes.

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