ENZON PHARMACEUTICALS, INC. SEC EDGAR Filings (CIK 0000727510)

SEC EDGAR filings, ownership reports, and insider transactions for ENZON PHARMACEUTICALS, INC..

Symbol
ENZN on OTC
Industry
Biological Products, (No Disgnostic Substances) (Office Of Life Sciences)
Business address
20 Commerce Drive, Suite 135, Cranford, NJ, 07016
State of incorporation
DE
Fiscal year end
31 December
Former names
ENZON PHARMACEUTICAL INC (to 10 Dec 2002), ENZON INC (to 09 Dec 2002)
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ENZON PHARMACEUTICALS, INC. has filed 1,444 SEC EDGAR filings since 03 Mar 1995

Latest Filings

Recent SEC filings for ENZON PHARMACEUTICALS, INC. including 8-A12G/A, 8-K, 10-Q and more.

Form type Document Filing Description Filing date Reporting date File number(s)
8-A12G/A Open 8-A12G/A document View SEC filing for 8-A12G/A 8-A12G/A 23 Dec 2025 000-12957
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 23 Dec 2025 23 Dec 2025 000-12957
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 12 Nov 2025 30 Sep 2025 000-12957
SCHEDULE 13D/A Open SCHEDULE 13D/A document View SEC filing for SCHEDULE 13D/A 24 Oct 2025 005-35587
425 Open 425 document View SEC filing for 425 425 24 Oct 2025 000-12957
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 24 Oct 2025 24 Oct 2025 000-12957
8-A12G/A Open 8-A12G/A document View SEC filing for 8-A12G/A 8-A12G/A 30 Sep 2025 000-12957
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 30 Sep 2025 30 Sep 2025 000-12957
8-A12G/A Open 8-A12G/A document View SEC filing for 8-A12G/A 8-A12G/A 14 Aug 2025 000-12957
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 14 Aug 2025 30 Jun 2025 000-12957
SCHEDULE 13D/A Open SCHEDULE 13D/A document View SEC filing for SCHEDULE 13D/A 23 Jun 2025 005-35587
425 Open 425 document | Open XBRL data View SEC filing for 425 425 23 Jun 2025 000-12957
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 23 Jun 2025 20 Jun 2025 000-12957
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 09 May 2025 31 Mar 2025 000-12957
10-K/A Open 10-K/A document | Open XBRL data View SEC filing for 10-K/A 10-K/A 28 Apr 2025 31 Dec 2024 000-12957
8-A12G/A Open 8-A12G/A document View SEC filing for 8-A12G/A 8-A12G/A 01 Apr 2025 000-12957
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 01 Apr 2025 31 Mar 2025 000-12957
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 21 Feb 2025 31 Dec 2024 000-12957
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 10 Jan 2025 07 Jan 2025
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 10 Jan 2025 07 Jan 2025 000-12957
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 27 Dec 2024 18 Dec 2024 000-12957
SCHEDULE 13D/A Open SCHEDULE 13D/A document View SEC filing for SCHEDULE 13D/A 19 Dec 2024 005-35587
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 05 Nov 2024 30 Sep 2024 000-12957
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 01 Oct 2024 26 Sep 2024 000-12957
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SC 13D/A 19 Aug 2024 005-35587
ARS Open ARS document View SEC filing for ARS ARS 08 Aug 2024 31 Dec 2023 000-12957
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 08 Aug 2024 000-12957
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 08 Aug 2024 26 Sep 2024 000-12957
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 08 Aug 2024 30 Jun 2024 000-12957
PRE 14A Open PRE 14A document View SEC filing for PRE 14A PRE 14A 29 Jul 2024 26 Sep 2024 000-12957
8-K/A Open 8-K/A document | Open XBRL data View SEC filing for 8-K/A FORM 8-K/A 11 Jul 2024 02 Jul 2024 000-12957
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 02 Jul 2024 02 Jul 2024 000-12957
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 14 Jun 2024 10 Jun 2024 000-12957
8-A12G/A Open 8-A12G/A document View SEC filing for 8-A12G/A 8-A12G/A 22 May 2024 000-12957
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 22 May 2024 16 May 2024 000-12957
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 10 May 2024 31 Mar 2024 000-12957
10-K/A Open 10-K/A document | Open XBRL data View SEC filing for 10-K/A FORM 10-K/A 26 Apr 2024 31 Dec 2023 000-12957
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 20 Mar 2024 31 Dec 2023 000-12957
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 05 Jan 2024 31 Dec 2023 000-12957
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 09 Nov 2023 30 Sep 2023 000-12957
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 07 Aug 2023 30 Jun 2023 000-12957
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 16 Jun 2023 14 Jun 2023
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 14 Jun 2023 08 Jun 2023 000-12957
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 05 May 2023 31 Mar 2023 000-12957
ARS Open ARS document View SEC filing for ARS ARS 20 Apr 2023 31 Dec 2022 000-12957
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 20 Apr 2023 000-12957
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 20 Apr 2023 08 Jun 2023 000-12957
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 16 Feb 2023 31 Dec 2022 000-12957
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 06 Jan 2023 31 Dec 2022 000-12957
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 09 Nov 2022 30 Sep 2022 000-12957
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 04 Aug 2022 30 Jun 2022 000-12957
3 Open 3 document View SEC filing for 3 FORM 3 21 Jun 2022 09 Jun 2022
8-K Open 8-K document | Open XBRL data View SEC filing for 8-K FORM 8-K 15 Jun 2022 09 Jun 2022 000-12957
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 26 Apr 2022 31 Mar 2022 000-12957
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 22 Apr 2022 000-12957
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 22 Apr 2022 09 Jun 2022 000-12957
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 25 Feb 2022 31 Dec 2021 000-12957
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 05 Nov 2021 30 Sep 2021 000-12957
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 17 Aug 2021 13 Aug 2021
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 05 Aug 2021 30 Jun 2021 000-12957
8-A12G/A Open 8-A12G/A document View SEC filing for 8-A12G/A 8-A12G/A 08 Jun 2021 000-12957
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 08 Jun 2021 02 Jun 2021 001-36435
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 04 May 2021 31 Mar 2021 001-36435
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 14 Apr 2021 001-36435
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 14 Apr 2021 02 Jun 2021 001-36435
PRE 14A Open PRE 14A document View SEC filing for PRE 14A PRE 14A 02 Apr 2021 02 Jun 2021 001-36435
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K FORM 10-K 23 Feb 2021 31 Dec 2020 001-36435
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 04 Jan 2021 30 Dec 2020 001-36435
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 21 Dec 2020 18 Dec 2020 001-36435
424B3 Open 424B3 document View SEC filing for 424B3 424B3 24 Nov 2020 333-250031
EFFECT Open EFFECT document View SEC filing for EFFECT 23 Nov 2020 333-250031
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 18 Nov 2020 16 Nov 2020
CORRESP Open CORRESP document View SEC filing for CORRESP 18 Nov 2020
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 17 Nov 2020 13 Nov 2020
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 17 Nov 2020
S-1 Open S-1 document View SEC filing for S-1 FORM S-1 12 Nov 2020 333-250031
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 09 Nov 2020 30 Sep 2020 001-36435
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 03 Nov 2020 001-36435
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 03 Nov 2020 18 Dec 2020 001-36435
4 Open 4 document View SEC filing for 4 FORM 4 14 Oct 2020 09 Oct 2020
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A 14 Oct 2020 005-35587
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 14 Oct 2020 09 Oct 2020 001-36435
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 23 Sep 2020 21 Sep 2020 001-36435
424B3 Open 424B3 document View SEC filing for 424B3 424B3 23 Sep 2020 333-248528
EFFECT Open EFFECT document View SEC filing for EFFECT 21 Sep 2020 333-248528
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A AMENDMENT NO. 2 TO THE SCHEDULE 13D 17 Sep 2020 005-35587
CORRESP Open CORRESP document View SEC filing for CORRESP 17 Sep 2020
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 15 Sep 2020 15 Sep 2020 001-36435
S-1/A Open S-1/A document View SEC filing for S-1/A S-1/A 15 Sep 2020 333-248528
UPLOAD Open UPLOAD document View SEC filing for UPLOAD 08 Sep 2020
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 02 Sep 2020 02 Sep 2020 001-36435
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A 01 Sep 2020 005-35587
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 01 Sep 2020 01 Sep 2020 001-36435
S-1 Open S-1 document View SEC filing for S-1 FORM S-1 01 Sep 2020 333-248528
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 31 Aug 2020 31 Aug 2020 001-36435
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 26 Aug 2020 24 Aug 2020
3 Open 3 document View SEC filing for 3 FORM 3 18 Aug 2020 04 Aug 2020
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 14 Aug 2020 14 Aug 2020 001-36435
8-A12G Open 8-A12G document View SEC filing for 8-A12G 8-A12G 14 Aug 2020 000-12957
3 Open 3 document View SEC filing for 3 FORM 3 14 Aug 2020 04 Aug 2020
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A 07 Aug 2020 005-35587
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 07 Aug 2020 04 Aug 2020 001-36435
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Aug 2020 05 Aug 2020
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 06 Aug 2020 03 Aug 2020
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A AMENDMENT NO. 1 TO THE SCHEDULE 13D 05 Aug 2020 005-35587
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 29 Jul 2020 30 Jun 2020 001-36435
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 30 Apr 2020 31 Mar 2020 001-36435
10-K/A Open 10-K/A document View SEC filing for 10-K/A FORM 10-K/A 24 Apr 2020 31 Dec 2019 001-36435
SC 13D Open SC 13D document View SEC filing for SC 13D THE SCHEDULE 13D 16 Apr 2020 005-35587
4/A Open 4/A document View SEC filing for 4/A OWNERSHIP DOCUMENT 31 Mar 2020 13 Mar 2020
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 31 Mar 2020 18 Mar 2020
4 Open 4 document View SEC filing for 4 27 Mar 2020 13 Mar 2020
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 3 TO THE SCHEDULE 13G 27 Mar 2020 005-35587
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K FORM 10-K 19 Feb 2020 31 Dec 2019 001-36435
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 22 Jan 2020 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 16 Jan 2020 005-35587
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 06 Nov 2019 30 Sep 2019 001-36435
8-K Open 8-K document View SEC filing for 8-K 8-K 22 Aug 2019 22 Aug 2019 001-36435
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 07 Aug 2019 30 Jun 2019 001-36435
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 12 Jul 2019 001-36435
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 12 Jul 2019 22 Aug 2019 001-36435
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 08 May 2019 31 Mar 2019 001-36435
10-K/A Open 10-K/A document View SEC filing for 10-K/A 10-K/A 25 Apr 2019 31 Dec 2018 001-36435
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K FORM 10-K 21 Feb 2019 31 Dec 2018 001-36435
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 14 Feb 2019 11 Feb 2019
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 2 TO THE SCHEDULE 13G 14 Feb 2019 005-35587
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 01 Feb 2019 30 Jan 2019 001-36435
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 31 Jan 2019 005-35587
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 09 Jan 2019 13 Apr 2018
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 09 Jan 2019 13 Apr 2018
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 03 Jan 2019 005-35587
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 07 Nov 2018 30 Sep 2018 001-36435
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 13 Aug 2018 09 Aug 2018 001-36435
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 10 Aug 2018 30 Jun 2018 001-36435
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 29 Jun 2018 001-36435
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEFINITIVE PROXY STATEMENT 29 Jun 2018 09 Aug 2018 001-36435
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 10 May 2018 31 Mar 2018 001-36435
10-K/A Open 10-K/A document View SEC filing for 10-K/A 10-K/A 25 Apr 2018 31 Dec 2017 001-36435
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 13 Apr 2018 04 Apr 2018
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 1 TO SCHEDULE 13G 13 Apr 2018 005-35587
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 21 Mar 2018 31 Dec 2017 001-36435
15-12G Open 15-12G document View SEC filing for 15-12G 15-12G 13 Feb 2018 000-12957
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 09 Feb 2018 005-35587
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 22 Jan 2018 005-35587
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 09 Nov 2017 30 Sep 2017 001-36435
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 10 Aug 2017 10 Aug 2017 001-36435
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 10 Aug 2017 30 Jun 2017 001-36435
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 30 Jun 2017 26 Jun 2017 001-36435
SC 13G Open SC 13G document View SEC filing for SC 13G THE SCHEDULE 13G 24 May 2017 005-35587
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 12 May 2017 001-36435
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 12 May 2017 28 Jun 2017 001-36435
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 11 May 2017 31 Mar 2017 001-36435
10-K/A Open 10-K/A document View SEC filing for 10-K/A FORM 10-K/A 28 Apr 2017 31 Dec 2016 001-36435
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 24 Mar 2017 31 Dec 2016 001-36435
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 13G/A 14 Feb 2017 005-35587
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A 08 Dec 2016 005-35587
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 08 Dec 2016 08 Dec 2016 001-36435
4 Open 4 document View SEC filing for 4 FORM 4 29 Nov 2016 28 Nov 2016
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A 29 Nov 2016 005-35587
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 14 Nov 2016 14 Nov 2016 001-36435
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 10 Nov 2016 30 Sep 2016 001-36435
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 26 Oct 2016 25 Oct 2016 001-36435
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 10 Aug 2016 30 Jun 2016 001-36435
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 09 Aug 2016 09 Aug 2016 001-36435
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 05 Jul 2016 29 Jun 2016 001-36435
25-NSE Open 25-NSE document | Open XBRL data View SEC filing for 25-NSE 10 Jun 2016 000-12957
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 09 Jun 2016 005-35587
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 16 May 2016 11 May 2016 001-36435
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 13 May 2016 001-36435
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 13 May 2016 29 Jun 2016 001-36435
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 09 May 2016 31 Mar 2016 001-36435
10-K/A Open 10-K/A document View SEC filing for 10-K/A FORM 10-K/A 28 Apr 2016 31 Dec 2015 001-36435
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 05 Apr 2016 31 Mar 2016
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K FORM 10-K 21 Mar 2016 31 Dec 2015 001-36435
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 21 Mar 2016 18 Mar 2016 001-36435
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 23 Feb 2016 22 Feb 2016 001-36435
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 12 Feb 2016 005-35587
SC 13G Open SC 13G document View SEC filing for SC 13G ENZON PHARMACEUTICALS, INC. 12 Feb 2016 005-35587
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 09 Feb 2016 02 Feb 2016 001-36435
DEFA14A Open DEFA14A document View SEC filing for DEFA14A FORM 8-K 09 Feb 2016 001-36435
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 26 Jan 2016 005-35587
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 07 Dec 2015 04 Dec 2015 001-36435
8-K Open 8-K document View SEC filing for 8-K 8-K 03 Dec 2015 02 Dec 2015 001-36435
8-K Open 8-K document View SEC filing for 8-K CURRENT REPORT 12 Nov 2015 11 Nov 2015 001-36435
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 06 Nov 2015 30 Sep 2015 001-36435
8-K Open 8-K document View SEC filing for 8-K 8-K 15 Sep 2015 11 Sep 2015 001-36435
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 07 Aug 2015 30 Jun 2015 001-36435
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 08 Jul 2015 06 Jul 2015 001-36435
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 02 Jul 2015 30 Jun 2015 001-36435
ARS Open ARS document View SEC filing for ARS AUTO-GENERATED PAPER DOCUMENT 19 May 2015 31 Dec 2014 001-36435
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 15 May 2015 001-36435
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 15 May 2015 30 Jun 2015 001-36435
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 13 May 2015 31 Mar 2015 001-36435
PRE 14A Open PRE 14A document View SEC filing for PRE 14A FORM PRE 14A 28 Apr 2015 28 Apr 2015 001-36435
10-K/A Open 10-K/A document View SEC filing for 10-K/A FORM 10-K/A 24 Apr 2015 31 Dec 2014 001-36435
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 05 Mar 2015 31 Dec 2014 001-36435
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 06 Feb 2015 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 22 Jan 2015 005-35587
8-K Open 8-K document View SEC filing for 8-K 8-K 10 Dec 2014 08 Dec 2014 001-36435
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 05 Dec 2014 04 Dec 2014 001-36435
4 Open 4 document View SEC filing for 4 FORM 4 28 Nov 2014 28 Nov 2012
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 06 Nov 2014 30 Sep 2014 001-36435
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 08 Aug 2014 30 Jun 2014 001-36435
8-K Open 8-K document View SEC filing for 8-K CURRENT REPORT 16 Jul 2014 25 Jun 2014 001-36435
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 12 Jun 2014 10 Jun 2014 001-36435
8-K Open 8-K document View SEC filing for 8-K 8-K 30 May 2014 28 May 2014 001-36435
8-K Open 8-K document View SEC filing for 8-K 8-K 19 May 2014 19 May 2014 001-36435
DEFA14A Open DEFA14A document View SEC filing for DEFA14A 8-K 19 May 2014 001-36435
8-K Open 8-K document View SEC filing for 8-K 8-K 09 May 2014 08 May 2014 001-36435
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 09 May 2014 31 Mar 2014 001-36435
8-A12B Open 8-A12B document View SEC filing for 8-A12B 8-A12B 01 May 2014 001-36435
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 01 May 2014 30 Apr 2014 000-12957
ARS Open ARS document View SEC filing for ARS AUTO-GENERATED PAPER DOCUMENT 18 Apr 2014 31 Dec 2013 001-36435
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 16 Apr 2014 000-12957
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 16 Apr 2014 28 May 2014 000-12957
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A ENZN13GAMEND6 09 Apr 2014 005-35587
8-K Open 8-K document View SEC filing for 8-K 8-K 25 Mar 2014 19 Mar 2014 000-12957
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 14 Mar 2014 31 Dec 2013 000-12957
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 13 Mar 2014 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 12 Feb 2014 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 10 Jan 2014 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A ENZN13GAMEND5.PDML 09 Jan 2014 005-35587
8-K Open 8-K document View SEC filing for 8-K CURRENT REPORT 16 Dec 2013 13 Dec 2013 000-12957
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 13 Dec 2013 13 Dec 2013
8-K Open 8-K document View SEC filing for 8-K 8-K 05 Dec 2013 05 Dec 2013 000-12957
8-K Open 8-K document View SEC filing for 8-K 8-K 21 Nov 2013 13 Nov 2013 000-12957
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 12 Nov 2013 30 Sep 2013 000-12957
8-K Open 8-K document View SEC filing for 8-K 8-K 22 Oct 2013 21 Oct 2013 000-12957
ARS Open ARS document View SEC filing for ARS AUTO-GENERATED PAPER DOCUMENT 15 Oct 2013 31 Dec 2012 000-12957
8-K Open 8-K document View SEC filing for 8-K 8-K 15 Oct 2013 14 Oct 2013 000-12957
DEFA14A Open DEFA14A document View SEC filing for DEFA14A DEFA14A 11 Oct 2013 000-12957
DEF 14A Open DEF 14A document View SEC filing for DEF 14A DEF 14A 11 Oct 2013 20 Nov 2013 000-12957
3 Open 3 document View SEC filing for 3 FORM 3 09 Oct 2013 07 Oct 2013
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A 09 Oct 2013 005-35587
8-K Open 8-K document View SEC filing for 8-K 8-K 09 Oct 2013 07 Oct 2013 000-12957
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 07 Oct 2013 25 Sep 2013
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 07 Oct 2013 25 Sep 2013
8-K Open 8-K document View SEC filing for 8-K 8-K 01 Oct 2013 25 Sep 2013 000-12957
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 19 Sep 2013 17 Sep 2013
8-K Open 8-K document View SEC filing for 8-K 8-K 12 Aug 2013 07 Aug 2013 000-12957
8-K Open 8-K document View SEC filing for 8-K 8-K 09 Aug 2013 06 Aug 2013 000-12957
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 10-Q 06 Aug 2013 30 Jun 2013 000-12957
8-K Open 8-K document View SEC filing for 8-K 8-K 25 Jul 2013 22 Jul 2013 000-12957
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 1 TO SCHEDULE 13G 14 Jun 2013 005-35587
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 10 May 2013 31 Mar 2013 000-12957
8-K Open 8-K document View SEC filing for 8-K 8-K 06 May 2013 30 Apr 2013 000-12957
10-K/A Open 10-K/A document View SEC filing for 10-K/A FORM 10-K/A 30 Apr 2013 31 Dec 2012 000-12957
8-K Open 8-K document View SEC filing for 8-K 8-K 24 Apr 2013 23 Apr 2013 000-12957
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 26 Mar 2013 21 Mar 2013 000-12957
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 18 Mar 2013 18 Mar 2013 000-12957
10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 10-K 18 Mar 2013 31 Dec 2012 000-12957
8-K Open 8-K document View SEC filing for 8-K 8-K 28 Feb 2013 28 Feb 2013 000-12957
8-K Open 8-K document View SEC filing for 8-K 8-K 21 Feb 2013 21 Feb 2013 000-12957
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A ENZN13GAMEND4 13 Feb 2013 005-35587
8-K Open 8-K document View SEC filing for 8-K 8-K 12 Feb 2013 06 Feb 2013 000-12957
SC 13G Open SC 13G document View SEC filing for SC 13G 12 Feb 2013 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 11 Feb 2013 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 06 Feb 2013 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 31 Jan 2013 005-35587
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 25 Jan 2013 23 Jan 2013
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SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G - ENZON PHARMACEUTICALS, INC. 02 Jan 2013 005-35587
8-K Open 8-K document View SEC filing for 8-K 8-K 20 Dec 2012 14 Dec 2012 000-12957
8-K Open 8-K document View SEC filing for 8-K 8-K 30 Nov 2012 29 Nov 2012 000-12957
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10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q FORM 10-Q 09 Nov 2012 30 Sep 2012 000-12957
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 08 Nov 2012 07 Nov 2012
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UPLOAD Open UPLOAD document View SEC filing for UPLOAD 12 Oct 2012
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10-Q Open 10-Q document View SEC filing for 10-Q FORM 10-Q 03 Aug 2012 30 Jun 2012 000-12957
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4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 03 Jul 2012 02 Jul 2012
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4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 21 Jun 2012 20 Jun 2012
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jun 2012 05 Jun 2012
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 06 Jun 2012 05 Jun 2012
8-K Open 8-K document View SEC filing for 8-K 22 May 2012 16 May 2012 000-12957
8-K Open 8-K document View SEC filing for 8-K 07 May 2012 07 May 2012 000-12957
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 02 May 2012 31 Mar 2012 000-12957
8-K Open 8-K document View SEC filing for 8-K 02 May 2012 02 May 2012 000-12957
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A ENZON PHARMACEUTICALS SC 13GA 3-31-2012 10 Apr 2012 005-35587
ARS Open ARS document View SEC filing for ARS AUTO-GENERATED PAPER DOCUMENT 06 Apr 2012 31 Dec 2011 000-12957
DEFA14A Open DEFA14A document View SEC filing for DEFA14A 06 Apr 2012 000-12957
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4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 29 Mar 2012 28 Mar 2012
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10-K Open 10-K document | Open XBRL data View SEC filing for 10-K 12 Mar 2012 31 Dec 2011 000-12957
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4 Open 4 document View SEC filing for 4 FORM 4 29 Feb 2012 27 Feb 2012
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8-K Open 8-K document View SEC filing for 8-K 28 Feb 2012 27 Feb 2012 000-12957
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SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A 28 Feb 2012 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A ENZON PHARMACEUTICALS SC 13GA 12-31-2011 14 Feb 2012 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A ENZON PHARMACEUTICALS, INC. 14 Feb 2012 005-35587
8-K Open 8-K document View SEC filing for 8-K 13 Feb 2012 10 Feb 2012 000-12957
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A ENZN13GAMEND3 10 Feb 2012 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 09 Feb 2012 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 06 Feb 2012 005-35587
4/A Open 4/A document View SEC filing for 4/A OWNERSHIP DOCUMENT 19 Jan 2012 17 Nov 2011
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 19 Jan 2012 17 Jan 2012
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4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 05 Jan 2012 03 Jan 2012
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 05 Jan 2012 03 Jan 2012
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 05 Jan 2012 03 Jan 2012
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 05 Jan 2012 03 Jan 2012
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 05 Jan 2012 03 Jan 2012
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 20 Dec 2011 19 Dec 2011
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 20 Dec 2011 19 Dec 2011
8-K Open 8-K document View SEC filing for 8-K 09 Dec 2011 08 Dec 2011 000-12957
8-K Open 8-K document View SEC filing for 8-K 30 Nov 2011 23 Nov 2011 000-12957
8-K/A Open 8-K/A document View SEC filing for 8-K/A 23 Nov 2011 13 Oct 2011 000-12957
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 21 Nov 2011 17 Nov 2011
4 Open 4 document View SEC filing for 4 10 Nov 2011 10 Nov 2011
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 10 Nov 2011 08 Nov 2011
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 04 Nov 2011 30 Sep 2011 000-12957
8-K Open 8-K document View SEC filing for 8-K 03 Nov 2011 03 Nov 2011 000-12957
8-K Open 8-K document View SEC filing for 8-K 17 Oct 2011 13 Oct 2011 000-12957
SC 13G Open SC 13G document View SEC filing for SC 13G 06 Oct 2011 005-35587
8-K Open 8-K document View SEC filing for 8-K 22 Sep 2011 22 Sep 2011 000-12957
8-K Open 8-K document View SEC filing for 8-K 20 Sep 2011 15 Sep 2011 000-12957
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 19 Sep 2011 15 Sep 2011
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 19 Sep 2011 15 Sep 2011
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SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A 22 Aug 2011 005-35587
8-K Open 8-K document View SEC filing for 8-K 17 Aug 2011 11 Aug 2011 000-12957
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 16 Aug 2011 12 Aug 2011
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SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A 15 Aug 2011 005-35587
8-K/A Open 8-K/A document View SEC filing for 8-K/A 08 Aug 2011 10 May 2011 000-12957
10-Q Open 10-Q document | Open XBRL data View SEC filing for 10-Q 05 Aug 2011 30 Jun 2011 000-12957
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S-8 Open S-8 document View SEC filing for S-8 10 May 2011 333-174099
10-Q Open 10-Q document View SEC filing for 10-Q 06 May 2011 31 Mar 2011 000-12957
8-K Open 8-K document View SEC filing for 8-K 06 May 2011 06 May 2011 000-12957
ARS Open ARS document View SEC filing for ARS AUTO-GENERATED PAPER DOCUMENT 26 Apr 2011 31 Dec 2010 000-12957
SC 13G Open SC 13G document View SEC filing for SC 13G ENZON PHARMACEUTICALS, INC. 21 Apr 2011 005-35587
DEF 14A Open DEF 14A document View SEC filing for DEF 14A 08 Apr 2011 10 May 2011 000-12957
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8-K Open 8-K document View SEC filing for 8-K 24 Mar 2011 21 Mar 2011 000-12957
8-K Open 8-K document View SEC filing for 8-K 17 Mar 2011 11 Mar 2011 000-12957
10-K Open 10-K document View SEC filing for 10-K 16 Mar 2011 31 Dec 2010 000-12957
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A MARCH 4, 2011 04 Mar 2011 005-35587
4 Open 4 document View SEC filing for 4 01 Mar 2011 28 Feb 2011
3 Open 3 document View SEC filing for 3 FORM 3 28 Feb 2011 17 Feb 2011
4 Open 4 document View SEC filing for 4 24 Feb 2011 22 Feb 2011
8-K Open 8-K document View SEC filing for 8-K 17 Feb 2011 17 Feb 2011 000-12957
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Feb 2011 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A ENZN13GAMEND2 11 Feb 2011 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 13G AMENDMENT 11 Feb 2011 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A ENZON PHARMACEUTICALS, INC. 10 Feb 2011 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 04 Feb 2011 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 04 Feb 2011 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A ENZON PHARMACEUTICALS SC 13GA 12-31-2010 04 Feb 2011 005-35587
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8-K Open 8-K document View SEC filing for 8-K 12 Nov 2010 10 Nov 2010 000-12957
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10-Q Open 10-Q document View SEC filing for 10-Q 04 Nov 2010 30 Sep 2010 000-12957
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8-K Open 8-K document View SEC filing for 8-K 03 Aug 2010 03 Aug 2010 000-12957
3 Open 3 document View SEC filing for 3 28 Jul 2010 23 Jul 2010
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8-K Open 8-K document View SEC filing for 8-K 08 Jul 2010 01 Jul 2010 000-12957
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DEFR14A Open DEFR14A document View SEC filing for DEFR14A 29 Jun 2010 000-12957
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8-K Open 8-K document View SEC filing for 8-K 18 Jun 2010 17 Jun 2010 000-12957
DEF 14A Open DEF 14A document View SEC filing for DEF 14A 10 Jun 2010 13 Jul 2010 000-12957
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A ENZON PHARMACEUTICALS INC 13GA2 10 Jun 2010 005-35587
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PREC14A Open PREC14A document View SEC filing for PREC14A 14 May 2010 000-12957
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10-Q Open 10-Q document View SEC filing for 10-Q 10 May 2010 31 Mar 2010 000-12957
8-K Open 8-K document View SEC filing for 8-K 10 May 2010 10 May 2010 000-12957
8-K Open 8-K document View SEC filing for 8-K 8-K 07 May 2010 07 May 2010 000-12957
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8-K Open 8-K document View SEC filing for 8-K 22 Apr 2010 19 Apr 2010 000-12957
DEFA14A Open DEFA14A document View SEC filing for DEFA14A 22 Apr 2010 000-12957
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8-K Open 8-K document View SEC filing for 8-K FORM 8-K 08 Mar 2010 08 Mar 2010 000-12957
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SC TO-I/A Open SC TO-I/A document View SEC filing for SC TO-I/A 23 Feb 2010 005-35587
8-K Open 8-K document View SEC filing for 8-K ENZON PHARMACEUTICALS 8-K 23 Feb 2010 19 Feb 2010 000-12957
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A FEBRUARY 22, 2010 22 Feb 2010 005-35587
8-K Open 8-K document View SEC filing for 8-K 17 Feb 2010 17 Feb 2010 000-12957
SC 13G Open SC 13G document View SEC filing for SC 13G ENZ13GSUBMISSION 16 Feb 2010 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A TERMINATION 16 Feb 2010 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A ENZN13GAMEND1 12 Feb 2010 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 13G/A 12 Feb 2010 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A ENZON PHARMACEUTICALS, INC. 12 Feb 2010 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 11 Feb 2010 005-35587
SC 13G Open SC 13G document View SEC filing for SC 13G 05 Feb 2010 005-35587
8-K Open 8-K document View SEC filing for 8-K 05 Feb 2010 05 Feb 2010 000-12957
SC TO-I Open SC TO-I document View SEC filing for SC TO-I 05 Feb 2010 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT 2 TO FORM 13G 02 Feb 2010 005-35587
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A ENZON PHARMACEUTICALS INC 13GA 1 02 Feb 2010 005-35587
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 29 Jan 2010 29 Jan 2010 000-12957
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SC 13G Open SC 13G document View SEC filing for SC 13G 29 Jan 2010 005-35587
8-K Open 8-K document View SEC filing for 8-K FORM 8-K 21 Jan 2010 19 Jan 2010 000-12957
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SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 1 20 Jan 2010 005-35587
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About this filer

ENZON PHARMACEUTICALS, INC. files with the SEC under CIK 0000727510. This page aggregates EDGAR filings and related ownership activity.

Industry: Biological Products, (No Disgnostic Substances).

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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