Yorktown Energy Partners VIII, L.P. SEC EDGAR Filings (CIK 0001473116)

SEC EDGAR filings, ownership reports, and insider transactions for Yorktown Energy Partners VIII, L.P..

Business address
410 Park Avenue, 20 Th Floor, New York, NY, 10022
State of incorporation
DE
Fiscal year end
31 December
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Yorktown Energy Partners VIII, L.P. has filed 64 SEC EDGAR filings since 25 Sep 2009

Latest Filings

Recent SEC filings for Yorktown Energy Partners VIII, L.P. including 13F-NT, 13F-HR, 144 and more.

Form type Document Filing Description Filing date Reporting date File number(s)
13F-NT Open 13F-NT document View SEC filing for 13F-NT 17 Feb 2026 31 Dec 2025 028-17371
13F-NT Open 13F-NT document View SEC filing for 13F-NT 14 Nov 2025 30 Sep 2025 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2025 30 Jun 2025 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2025 31 Mar 2025 028-17371
144 Open 144 document View SEC filing for 144 18 Feb 2025
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2025 31 Dec 2024 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 13 Nov 2024 30 Sep 2024 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 13 Aug 2024 30 Jun 2024 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2024 31 Mar 2024 028-17371
144 Open 144 document View SEC filing for 144 07 May 2024
144 Open 144 document View SEC filing for 144 12 Mar 2024
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2024 31 Dec 2023 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2023 30 Sep 2023 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2023 30 Jun 2023 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 12 May 2023 31 Mar 2023 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2023 31 Dec 2022 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2022 30 Sep 2022 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 11 Aug 2022 30 Jun 2022 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 May 2022 31 Mar 2022 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2022 31 Dec 2021 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 Nov 2021 30 Sep 2021 028-17371
4 Open 4 document View SEC filing for 4 15 Oct 2021 13 Oct 2021 001-15555
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 Aug 2021 30 Jun 2021 028-17371
4 Open 4 document View SEC filing for 4 FORM 4 30 Jul 2021 28 Jul 2021 001-15555
13F-HR Open 13F-HR document View SEC filing for 13F-HR 17 May 2021 31 Mar 2021 028-17371
3 Open 3 document View SEC filing for 3 FORM 3 01 Mar 2021 26 Feb 2021 001-15555
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 Feb 2021 31 Dec 2020 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 Nov 2020 30 Sep 2020 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2020 30 Jun 2020 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2020 31 Mar 2020 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2020 31 Dec 2019 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2019 30 Sep 2019 028-17371
4 Open 4 document View SEC filing for 4 FORM 4 13 Nov 2019 12 Nov 2019 001-38075
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2019 30 Jun 2019 028-17371
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 23 May 2019 21 May 2019 001-38075
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2019 31 Mar 2019 028-17371
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SC 13D/A 20 Mar 2019
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 15 Mar 2019 12 Mar 2019 001-38075
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 15 Mar 2019 12 Mar 2019 001-38075
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2019 31 Dec 2018 028-17371
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SC 13D/A 04 Dec 2018
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 14 Nov 2018 12 Nov 2018 001-34743
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2018 30 Sep 2018 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2018 30 Jun 2018 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2018 31 Mar 2018 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2018 31 Dec 2017 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2017 30 Sep 2017 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2017 30 Jun 2017 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2017 31 Mar 2017 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2017 31 Dec 2016 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2016 30 Sep 2016 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 Aug 2016 30 Jun 2016 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 May 2016 31 Mar 2016 028-17371
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 Feb 2016 31 Dec 2015 028-17371
3 Open 3 document View SEC filing for 3 FORM 3 SUBMISSION 21 Dec 2015 09 Dec 2015 001-32960
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SC 13D/A 05 Jun 2014
4 Open 4 document View SEC filing for 4 FORM 4 SUBMISSION 19 Mar 2014 10 Mar 2014 001-35374
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SC 13D/A 13 Mar 2014
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A SCHEDULE 13D AMENDMENT NO. 1 24 Oct 2012
4 Open 4 document View SEC filing for 4 FORM 4 24 Oct 2012 22 Oct 2012 001-35374
SC 13D Open SC 13D document View SEC filing for SC 13D SCHEDULE 13D 30 Dec 2011
3 Open 3 document View SEC filing for 3 MAIN DOCUMENT DESCRIPTION 22 Dec 2011 20 Dec 2011 001-35374

About this filer

Yorktown Energy Partners VIII, L.P. files with the SEC under CIK 0001473116. 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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