MACKAY SHIELDS LLC SEC EDGAR Filings (CIK 0000061227)

SEC EDGAR filings, ownership reports, and insider transactions for MACKAY SHIELDS LLC.

Business address
299 Park Avenue, 32 Nd Floor, New York, NY, 10171
Top securities (13F)
WESTERN DIGITAL CORP, LUMENTUM HLDGS INC, ADVANCED ENERGY INDS, MIRUM PHARMACEUTICALS INC, LANTHEUS HLDGS INC, QXOPRB, TETRA TECH INC NEW, BAPRA, CABLE ONE INC, UBER TECHNOLOGIES INC, APOPRA, POST HLDGS INC, PG&E CORP, ON SEMICONDUCTOR CORP, MKS INC., IRHYTHM TECHNOLOGIES INC, SEAGATE HDD CAYMAN, SNOWFLAKE INC, LIBERTY MEDIA CORP DEL, and HPEPRC
Top holdings (Schedule 13G)
FET
State of incorporation
DE
Fiscal year end
31 December
Former names
MACKAY SHIELDS FINANCIAL CORP (to 07 Feb 2001)
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MACKAY SHIELDS LLC has filed 375 SEC EDGAR filings since 10 Feb 1995

Latest Filings

Recent SEC filings for MACKAY SHIELDS LLC including 13F-HR, SCHEDULE 13G/A, N-PX and more.

Form type Document Filing Description Filing date Reporting date File number(s)
13F-HR Open 13F-HR document View SEC filing for 13F-HR 29 Jan 2026 31 Dec 2025 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 27 Oct 2025 30 Sep 2025 028-00046
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 18 Sep 2025
N-PX Open N-PX document View SEC filing for N-PX 28 Aug 2025 30 Jun 2025 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 24 Jul 2025 30 Jun 2025 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 29 Apr 2025 31 Mar 2025 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 04 Feb 2025 31 Dec 2024 028-00046
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 22 Jan 2025
13F-HR Open 13F-HR document View SEC filing for 13F-HR 31 Oct 2024 30 Sep 2024 028-00046
N-PX Open N-PX document View SEC filing for N-PX 30 Aug 2024 30 Jun 2024 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 08 Aug 2024 30 Jun 2024 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 03 May 2024 31 Mar 2024 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 12 Apr 2024
3 Open 3 document View SEC filing for 3 3 25 Mar 2024 25 Mar 2024 811-23905
13F-HR Open 13F-HR document View SEC filing for 13F-HR 02 Feb 2024 31 Dec 2023 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 11 Jan 2024
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 11 Jan 2024
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 11 Jan 2024
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 11 Jan 2024
13F-HR Open 13F-HR document View SEC filing for 13F-HR 25 Oct 2023 30 Sep 2023 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 27 Jul 2023 30 Jun 2023 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 27 Apr 2023 31 Mar 2023 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 13 Apr 2023
13F-HR Open 13F-HR document View SEC filing for 13F-HR 31 Jan 2023 31 Dec 2022 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 17 Jan 2023
SC 13G Open SC 13G document View SEC filing for SC 13G MACKAY SHIELDS LLC 13 Jan 2023
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 06 Jan 2023
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 06 Jan 2023
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 06 Jan 2023
13F-HR Open 13F-HR document View SEC filing for 13F-HR 02 Nov 2022 30 Sep 2022 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 03 Aug 2022 30 Jun 2022 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 13 May 2022 31 Mar 2022 028-00046
3 Open 3 document View SEC filing for 3 10 Feb 2022 10 Feb 2022 811-23713
13F-HR Open 13F-HR document View SEC filing for 13F-HR 04 Feb 2022 31 Dec 2021 028-00046
13F-HR/A Open 13F-HR/A document View SEC filing for 13F-HR/A 18 Jan 2022 30 Sep 2021 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 13 Jan 2022
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 12 Jan 2022
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 12 Jan 2022
13F-HR Open 13F-HR document View SEC filing for 13F-HR 12 Nov 2021 30 Sep 2021 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 28 Oct 2021
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 28 Oct 2021
13F-HR Open 13F-HR document View SEC filing for 13F-HR 13 Aug 2021 30 Jun 2021 028-00046
SC 13G Open SC 13G document View SEC filing for SC 13G MACKAY SHIELDS LLC 25 May 2021
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 May 2021 31 Mar 2021 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 24 Feb 2021
3 Open 3 document View SEC filing for 3 23 Feb 2021 23 Feb 2021 811-23586
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 Feb 2021 31 Dec 2020 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 07 Jan 2021
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 07 Jan 2021
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 07 Jan 2021
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 07 Jan 2021
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 07 Jan 2021
13F-HR Open 13F-HR document View SEC filing for 13F-HR 04 Nov 2020 30 Sep 2020 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 05 Oct 2020
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 01 Oct 2020
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 01 Oct 2020
SC 13G Open SC 13G document View SEC filing for SC 13G MACKAY SHIELDS LLC 08 Sep 2020
SC 13G Open SC 13G document View SEC filing for SC 13G MACKAY SHIELDS LLC 11 Aug 2020
SC 13G Open SC 13G document View SEC filing for SC 13G MACKAY SHIELDS LLC 11 Aug 2020
SC 13G Open SC 13G document View SEC filing for SC 13G MACKAY SHIELDS LLC 11 Aug 2020
SC 13G Open SC 13G document View SEC filing for SC 13G MACKAY SHIELDS LLC 11 Aug 2020
13F-HR Open 13F-HR document View SEC filing for 13F-HR 31 Jul 2020 30 Jun 2020 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 08 May 2020 31 Mar 2020 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 11 Feb 2020 31 Dec 2019 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 07 Jan 2020
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 07 Jan 2020
13F-HR Open 13F-HR document View SEC filing for 13F-HR 01 Nov 2019 30 Sep 2019 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 13 Aug 2019 30 Jun 2019 028-00046
3 Open 3 document View SEC filing for 3 25 Jul 2019 25 Jul 2019 811-23434
13F-HR/A Open 13F-HR/A document View SEC filing for 13F-HR/A 15 May 2019 31 Mar 2019 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 13 May 2019 31 Mar 2019 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 13 Mar 2019
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2019 31 Dec 2018 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 10 Jan 2019
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 10 Jan 2019
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 10 Jan 2019
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2018 30 Sep 2018 028-00046
3 Open 3 document View SEC filing for 3 25 Oct 2018 25 Oct 2018 811-23366
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 16 Aug 2018
13F-HR Open 13F-HR document View SEC filing for 13F-HR 06 Aug 2018 30 Jun 2018 028-00046
SC 13G Open SC 13G document View SEC filing for SC 13G MACKAY SHIELDS LLC 11 May 2018
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 11 May 2018
13F-HR Open 13F-HR document View SEC filing for 13F-HR 03 May 2018 31 Mar 2018 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 24 Jan 2018 31 Dec 2017 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 11 Jan 2018
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 11 Jan 2018
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 11 Jan 2018
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 11 Jan 2018
13F-HR Open 13F-HR document View SEC filing for 13F-HR 24 Oct 2017 30 Sep 2017 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 13 Jul 2017 30 Jun 2017 028-00046
144 Open 144 document View SEC filing for 144 FORM 144 14 Jun 2017
144 Open 144 document View SEC filing for 144 FORM 144 17 May 2017
144 Open 144 document View SEC filing for 144 FORM 144 25 Apr 2017
13F-HR Open 13F-HR document View SEC filing for 13F-HR 20 Apr 2017 31 Mar 2017 028-00046
SC 13G Open SC 13G document View SEC filing for SC 13G MACKAY SHIELDS LLC 08 Mar 2017
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 03 Feb 2017
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 31 Jan 2017
SC 13G Open SC 13G document View SEC filing for SC 13G MACKAY SHIELDS LLC 30 Jan 2017
13F-HR Open 13F-HR document View SEC filing for 13F-HR 10 Jan 2017 31 Dec 2016 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 10 Jan 2017
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 10 Jan 2017
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 06 Jan 2017
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 06 Jan 2017
13F-HR Open 13F-HR document View SEC filing for 13F-HR 20 Oct 2016 30 Sep 2016 028-00046
SC 13G Open SC 13G document View SEC filing for SC 13G MACKAY SHIELDS LLC 11 Oct 2016
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 04 Aug 2016
13F-HR Open 13F-HR document View SEC filing for 13F-HR 25 Jul 2016 30 Jun 2016 028-00046
SC 13G Open SC 13G document View SEC filing for SC 13G MACKAY SHIELDS LLC 10 Jun 2016
SC 13G Open SC 13G document View SEC filing for SC 13G MACKAY SHIELDS LLC 10 Jun 2016
13F-HR Open 13F-HR document View SEC filing for 13F-HR 21 Apr 2016 31 Mar 2016 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 19 Jan 2016 31 Dec 2015 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 22 Oct 2015 30 Sep 2015 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 03 Aug 2015 30 Jun 2015 028-00046
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 12 May 2015 30 Apr 2015 001-11263
SC 13D Open SC 13D document View SEC filing for SC 13D SCHEDULE 13D 12 May 2015
13F-HR Open 13F-HR document View SEC filing for 13F-HR 05 May 2015 31 Mar 2015 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 29 Jan 2015 31 Dec 2014 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 24 Oct 2014 30 Sep 2014 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 22 Jul 2014 30 Jun 2014 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 08 May 2014 31 Mar 2014 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 10 Feb 2014
13F-HR Open 13F-HR document View SEC filing for 13F-HR 28 Jan 2014 31 Dec 2013 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A MACKAY SHIELDS LLC 15 Jan 2014
13F-HR Open 13F-HR document View SEC filing for 13F-HR 01 Nov 2013 30 Sep 2013 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR 07 Aug 2013 30 Jun 2013 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR MACKAY SHIELDS LLC 24 Apr 2013 31 Mar 2013 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR MACKAY SHIELDS LLC 22 Jan 2013 31 Dec 2012 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 14 Jan 2013
13F-HR Open 13F-HR document View SEC filing for 13F-HR MACKAY SHIELDS LLC 23 Oct 2012 30 Sep 2012 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR MACKAY SHIELDS LLC 31 Jul 2012 30 Jun 2012 028-00046
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 27 Jun 2012 26 Jun 2012 811-22551
13F-HR Open 13F-HR document View SEC filing for 13F-HR MACKAY SHIELDS LLC 01 May 2012 31 Mar 2012 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 27 Jan 2012
13F-HR Open 13F-HR document View SEC filing for 13F-HR MACKAY SHIELDS LLC 18 Jan 2012 31 Dec 2011 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR MACKAY SHIELDS LLC 02 Nov 2011 30 Sep 2011 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR MACKAY SHIELDS LLC 29 Jul 2011 30 Jun 2011 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR MACKAY SHIELDS LLC 13 May 2011 31 Mar 2011 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR MACKAY SHIELDS LLC 27 Jan 2011 31 Dec 2010 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 10 Jan 2011
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 29 Nov 2010
13F-HR Open 13F-HR document View SEC filing for 13F-HR MACKAY SHIELDS LLC 28 Oct 2010 30 Sep 2010 028-00046
3 Open 3 document View SEC filing for 3 27 Sep 2010 27 Sep 2010 811-22442
SC 13G Open SC 13G document View SEC filing for SC 13G 10 Sep 2010
13F-HR Open 13F-HR document View SEC filing for 13F-HR MACKAY SHIELDS LLC 02 Aug 2010 30 Jun 2010 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR MACKAY SHIELDS LLC 11 May 2010 31 Mar 2010 028-00046
13F-HR Open 13F-HR document View SEC filing for 13F-HR MACKAY SHIELDS LLC 01 Feb 2010 31 Dec 2009 028-00046
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 07 Jan 2010
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A 07 Jan 2010

About this filer

MACKAY SHIELDS LLC files with the SEC under CIK 0000061227. This page aggregates EDGAR filings and related ownership activity.

See reporting owner transactions.

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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