Filer Snapshot

William K. Heiden SEC EDGAR Filings

SEC filings, ownership reports, and insider transactions for CIK 0001214939.

Entity Type

Individual

Total Filings

57

Latest Filing

21 Aug 2025

Industry

n/a

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Go to latest filings table Open reporting owner context
Source: SEC Forms 3/4/5

4 filed on 21 Aug 2025 for CIK 0001214939.

View Source Filing
Business address
C/O Amag Pharmaceuticals, Inc., 1100 Winter Street, Waltham, MA, 02451
Top holdings (ownership)
MGNX and ATRA

Quick Takeaways

  • William K. Heiden is an SEC filer tracked under CIK 0001214939.
  • 57 filings are listed on this profile.
  • Common form coverage includes 4, 3.

What Changed

  • Latest filing: 4 filed on 21 Aug 2025.
  • Report period: 19 Aug 2025.

Why This Matters

  • You can quote filing dates and form types directly from the SEC record on this page.
  • Use this profile before deeper ownership or insider analysis to confirm filing history context.

Source Evidence

Source: SEC Forms 3/4/5

4 filed on 21 Aug 2025 for CIK 0001214939.

View Source Filing

Return Loop

Why revisit this filer page

A newly filed 4 can change the filing history, ownership context, or next research path for William K. Heiden.

Latest source-backed update
4 filed 21 Aug 2025
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Revisit after a new SEC filing appears to compare the updated record with prior filings.
  • Latest filing on record: 4 filed 21 Aug 2025.
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Filer freshness comes from SEC EDGAR submission history and related source-backed ownership or portfolio filings when available.

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Latest update

What changed recently for William K. Heiden

Ownership report updated

Latest ownership report period: 19 Aug 2025. Open the source-backed page to inspect the fresh filing or facts context.

Update date

21 Aug 2025

Page type

Ownership filings

Latest period

19 Aug 2025

Ownership context was refreshed from SEC Forms 3/4/5 filed on 21 Aug 2025.

Open ownership filings Browse recent public updates

Filer Overview

William K. Heiden has filed 57 SEC EDGAR filings since 14 Nov 2003. Common forms include 4, 3.

Reporting owner transactions Latest 13F filings

Latest Filings

Recent SEC filings for William K. Heiden with direct links to document and filing folders.

Form type Document Filing Description Filing date Reporting date File number(s)
4 Open 4 document View SEC filing for 4 FORM 4 21 Aug 2025 19 Aug 2025 001-36112
4 Open 4 document View SEC filing for 4 12 Jun 2025 10 Jun 2025 001-36548
4 Open 4 document View SEC filing for 4 FORM 4 22 May 2025 20 May 2025 001-36112
4 Open 4 document View SEC filing for 4 FORM 4 23 May 2024 21 May 2024 001-36112
4 Open 4 document View SEC filing for 4 FORM 4 22 May 2024 20 May 2024 001-36112
4 Open 4 document View SEC filing for 4 02 Apr 2024 31 Mar 2024 001-36548
4 Open 4 document View SEC filing for 4 14 Nov 2023 10 Nov 2023 001-36548
4 Open 4 document View SEC filing for 4 02 Jun 2023 31 May 2023 001-36548
4 Open 4 document View SEC filing for 4 FORM 4 02 Jun 2023 31 May 2023 001-36112
4 Open 4 document View SEC filing for 4 FORM 4 27 Jun 2022 23 Jun 2022 001-36548
4 Open 4 document View SEC filing for 4 FORM 4 24 May 2022 23 May 2022 001-36112
3 Open 3 document View SEC filing for 3 FORM 3 24 May 2022 23 May 2022 001-36112
4 Open 4 document View SEC filing for 4 FORM 4 09 Jun 2021 08 Jun 2021 001-36548
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 17 Jun 2020 16 Jun 2020 001-36548
4 Open 4 document View SEC filing for 4 4 04 Mar 2020 02 Mar 2020 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 25 Feb 2020 23 Feb 2020 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 01 Jul 2019 27 Jun 2019 001-36548
4 Open 4 document View SEC filing for 4 FORM 4 09 May 2019 09 May 2019 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 05 Mar 2019 01 Mar 2019 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 27 Feb 2019 25 Feb 2019 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 26 Feb 2019 23 Feb 2019 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 08 Aug 2018 07 Aug 2018 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 18 Jun 2018 14 Jun 2018 001-36548
4 Open 4 document View SEC filing for 4 FORM 4 05 Jun 2018 04 Jun 2018 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 - 06 Mar 2018 02 Mar 2018 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 12 Jun 2017 08 Jun 2017 001-36548
4 Open 4 document View SEC filing for 4 FORM 4 - 10 May 2017 08 May 2017 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 - 27 Feb 2017 23 Feb 2017 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jan 2017 03 Jan 2017 001-36548
4 Open 4 document View SEC filing for 4 FORM 4 - 17 May 2016 16 May 2016 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 - 01 Mar 2016 26 Feb 2016 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 05 Jan 2016 04 Jan 2016 001-36548
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 25 Nov 2015 23 Nov 2015 001-36548
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 25 Nov 2015 23 Nov 2015 001-36548
4 Open 4 document View SEC filing for 4 FORM 4 - 02 Oct 2015 01 Oct 2015 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 - 02 Sep 2015 01 Sep 2015 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 - 05 Aug 2015 03 Aug 2015 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 - 17 Jul 2015 15 Jul 2015 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 - 02 Jul 2015 01 Jul 2015 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 - 08 Jun 2015 05 Jun 2015 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 - 04 Jun 2015 02 Jun 2015 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 - 05 Mar 2015 03 Mar 2015 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 - 27 Feb 2015 26 Feb 2015 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 - 18 Dec 2014 17 Dec 2014 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 - 21 Aug 2014 19 Aug 2014 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 - 28 Feb 2014 27 Feb 2014 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 - 28 May 2013 24 May 2013 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 - 15 May 2013 14 May 2013 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 - 04 Mar 2013 28 Feb 2013 001-10865
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 29 May 2012 24 May 2012 001-10865
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 16 May 2012 14 May 2012 001-10865
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 16 May 2012 14 May 2012 001-10865
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 17 Jun 2010 15 Jun 2010 000-21794

About this filer

William K. Heiden files with the SEC under CIK 0001214939. This page aggregates EDGAR filings and related ownership activity.

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.
How often is this page updated?
Updates follow new EDGAR submissions and periodic data refreshes.
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