abrdn Healthcare Investors

Symbol
HQH on NYSE
Entity
Company
Business address
1900 Market Street, Suite 200, 19103 Philadelphia, PA
Phone
6177728515
State of incorporation
MA
Fiscal year end
September 30
Former names
TEKLA HEALTHCARE INVESTORS (to 10/5/2023), H&Q HEALTHCARE INVESTORS (to 9/18/2014)
All SEC filings
View on sec.gov
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abrdn Healthcare Investors has filed 518 SEC EDGAR filings since 12/13/1995

Latest Filings

Form type Document Filing Description Filing date Reporting date File number(s)
N-PX Open Document Open Filing Aug 29, 2025 Jun 30, 2025 811-04889
NPORT-P Open Document Open Filing Aug 28, 2025 Jun 30, 2025 811-04889
40-17G Open Document Open Filing 40-17G Jul 29, 2025 811-04889
3 Open Document Open Filing OWNERSHIP DOCUMENT Jul 22, 2025 Jul 17, 2025
N-CSRS Open Document Open Filing N-CSRS Jun 9, 2025 Mar 31, 2025 811-04889
NPORT-P Open Document Open Filing May 29, 2025 Mar 31, 2025 811-04889
DEF 14A Open Document Open Filing DEF 14A Apr 14, 2025 May 28, 2025 811-04889
3 Open Document Open Filing OWNERSHIP DOCUMENT Mar 20, 2025 Mar 11, 2025
3 Open Document Open Filing OWNERSHIP DOCUMENT Mar 20, 2025 Mar 11, 2025
3 Open Document Open Filing OWNERSHIP DOCUMENT Mar 20, 2025 Mar 11, 2025
3 Open Document Open Filing OWNERSHIP DOCUMENT Mar 20, 2025 Mar 11, 2025
3 Open Document Open Filing OWNERSHIP DOCUMENT Mar 20, 2025 Mar 11, 2025
3 Open Document Open Filing OWNERSHIP DOCUMENT Mar 20, 2025 Mar 11, 2025
NPORT-P Open Document Open Filing Feb 28, 2025 Dec 31, 2024 811-04889
3 Open Document Open Filing OWNERSHIP DOCUMENT Dec 20, 2024 Mar 13, 2024
3 Open Document Open Filing OWNERSHIP DOCUMENT Dec 20, 2024 Dec 10, 2024
N-CEN Open Document Open Filing Dec 16, 2024 Sep 30, 2024 811-04889
N-CSR Open Document Open Filing N-CSR Dec 9, 2024 Sep 30, 2024 811-04889
NPORT-P Open Document Open Filing Nov 27, 2024 Sep 30, 2024 811-04889
SC 13D/A Open Document Open Filing FORM SC 13D/A Nov 18, 2024 005-40606
SC 13D/A Open Document Open Filing FORM SC 13D/A Oct 22, 2024 005-40606
N-PX Open Document Open Filing Sep 3, 2024 Jun 30, 2024 811-04889
NPORT-P Open Document Open Filing Aug 28, 2024 Jun 30, 2024 811-04889
40-17G Open Document Open Filing 40-17G Aug 15, 2024 811-04889
4 Open Document Open Filing OWNERSHIP DOCUMENT Jul 18, 2024 Jul 16, 2024
3 Open Document Open Filing OWNERSHIP DOCUMENT Jun 18, 2024 Jun 12, 2024
3 Open Document Open Filing OWNERSHIP DOCUMENT Jun 18, 2024 Jun 10, 2024
N-CSRS Open Document Open Filing N-CSRS Jun 10, 2024 Mar 31, 2024 811-04889
NPORT-P Open Document Open Filing May 29, 2024 Mar 31, 2024 811-04889
SC 13D/A Open Document Open Filing FORM SC 13D/A May 3, 2024 005-40606
DEF 14A Open Document Open Filing DEF 14A Apr 22, 2024 Jun 25, 2024 811-04889
4 Open Document Open Filing OWNERSHIP DOCUMENT Apr 12, 2024 Apr 9, 2024
3 Open Document Open Filing PRIMARY DOCUMENT Mar 22, 2024 Mar 13, 2024
SC 13D Open Document Open Filing FORM SC 13D Mar 15, 2024 005-40606
NPORT-P Open Document Open Filing Feb 29, 2024 Dec 31, 2023 811-04889
SC 13G/A Open Document Open Filing MS AMENDMENT Feb 12, 2024 005-40606
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 9, 2024 Dec 21, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 4, 2024 Jan 2, 2024
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 2, 2024 Dec 28, 2023
3 Open Document Open Filing OWNERSHIP DOCUMENT Dec 22, 2023 Dec 13, 2023
3 Open Document Open Filing OWNERSHIP DOCUMENT Dec 22, 2023 Dec 13, 2023
N-CEN Open Document Open Filing Dec 12, 2023 Sep 30, 2023 811-04889
N-CSR Open Document Open Filing N-CSR Dec 11, 2023 Sep 30, 2023 811-04889
NPORT-P Open Document Open Filing Nov 15, 2023 Sep 30, 2023 811-04889
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 6, 2023 Oct 27, 2023
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 6, 2023 Oct 27, 2023
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 6, 2023 Oct 27, 2023
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 6, 2023 Oct 27, 2023
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 6, 2023 Oct 27, 2023
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 6, 2023 Oct 27, 2023
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 6, 2023 Oct 27, 2023
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 6, 2023 Oct 27, 2023
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 6, 2023 Oct 27, 2023
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 6, 2023 Oct 27, 2023
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 6, 2023 Oct 27, 2023
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 6, 2023 Oct 27, 2023
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 6, 2023 Oct 27, 2023
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 6, 2023 Oct 27, 2023
3 Open Document Open Filing OWNERSHIP DOCUMENT Nov 6, 2023 Oct 27, 2023
DEFA14A Open Document Open Filing DEFA14A Oct 5, 2023 811-04889
DEFA14A Open Document Open Filing DEFA14A Oct 4, 2023 811-04889
DEFA14A Open Document Open Filing DEFA14A Oct 2, 2023 811-04889
POS EX Open Document Open Filing POS EX Sep 27, 2023 333-195327
4 Open Document Open Filing OWNERSHIP DOCUMENT Sep 25, 2023 Sep 25, 2023
4 Open Document Open Filing OWNERSHIP DOCUMENT Sep 20, 2023 Sep 20, 2023
DEFA14A Open Document Open Filing DEFA14A Sep 15, 2023 811-04889
DEFA14A Open Document Open Filing DEFA14A Sep 15, 2023 811-04889
DEFA14A Open Document Open Filing DEFA14A Sep 13, 2023 811-04889
8-K Open Document Open Filing FORM 8-K Sep 12, 2023 Sep 6, 2023 811-04889
DEFA14A Open Document Open Filing DEFA14A Sep 5, 2023 811-04889
DEFA14A Open Document Open Filing DEFA14A Aug 29, 2023 811-04889
NPORT-P Open Document Open Filing Aug 28, 2023 Jun 30, 2023 811-04889
N-CSR/A Open Document Open Filing N-CSR/A Aug 25, 2023 Sep 30, 2022 811-04889
DEFA14A Open Document Open Filing DEFA14A Aug 22, 2023 811-04889
N-CSR/A Open Document Open Filing N-CSR/A Aug 22, 2023 Sep 30, 2022 811-04889
CORRESP Open Document Open Filing Aug 22, 2023
DEFA14A Open Document Open Filing DEFA14A Aug 14, 2023 811-04889
DEFA14A Open Document Open Filing DEFA14A Aug 11, 2023 811-04889
N-PX Open Document Open Filing N-PX Aug 4, 2023 Jun 30, 2023 811-04889
40-17G Open Document Open Filing 40-17G Aug 4, 2023 811-04889
DEFA14A Open Document Open Filing DEFA14A Jul 28, 2023 811-04889
DEFA14A Open Document Open Filing DEFA14A Jul 18, 2023 811-04889
DEFA14A Open Document Open Filing DEFA 14A Jul 11, 2023 811-04889
DEF 14A Open Document Open Filing DEF 14A Jul 10, 2023 Aug 14, 2023 811-04889
PRE 14A Open Document Open Filing PRE 14A Jun 27, 2023 Aug 14, 2023 811-04889
N-CSRS Open Document Open Filing N-CSRS Jun 6, 2023 Mar 31, 2023 811-04889
NPORT-P Open Document Open Filing May 15, 2023 Mar 31, 2023 811-04889
DEF 14A Open Document | Data Open Filing DEF 14A Apr 11, 2023 811-04889
NPORT-P Open Document Open Filing Feb 24, 2023 Dec 31, 2022 811-04889
SC 13G/A Open Document Open Filing MS AMENDMENT Feb 10, 2023 005-40606
N-CEN Open Document Open Filing Dec 13, 2022 Sep 30, 2022 811-04889
N-CSR Open Document Open Filing N-CSR Dec 7, 2022 Sep 30, 2022 811-04889
NPORT-P Open Document Open Filing Nov 21, 2022 Sep 30, 2022 811-04889
NPORT-P Open Document Open Filing Aug 26, 2022 Jun 30, 2022 811-04889
N-PX Open Document Open Filing N-PX Aug 19, 2022 Jun 30, 2022 811-04889
40-17G Open Document Open Filing 40-17G Aug 15, 2022 811-04889
POS EX Open Document Open Filing POS EX Jul 29, 2022 333-195327
POS EX Open Document Open Filing POS EX Jul 1, 2022 333-195327
3 Open Document Open Filing OWNERSHIP DOCUMENT Jun 14, 2022 Jun 9, 2022
N-CSRS Open Document Open Filing N-CSRS Jun 3, 2022 Mar 31, 2022 811-04889
NPORT-P Open Document Open Filing May 25, 2022 Mar 31, 2022 811-04889
DEF 14A Open Document Open Filing DEF 14A Apr 12, 2022 Jun 9, 2022 811-04889
4 Open Document Open Filing OWNERSHIP DOCUMENT Mar 24, 2022 Mar 23, 2022
NPORT-P Open Document Open Filing Feb 23, 2022 Dec 31, 2021 811-04889
SC 13G/A Open Document Open Filing MS AMENDMENT Feb 11, 2022 005-40606
4 Open Document Open Filing OWNERSHIP DOCUMENT Jan 27, 2022 Jan 26, 2022
POS EX Open Document Open Filing POS EX Dec 22, 2021 333-195327
N-CEN Open Document Open Filing Dec 13, 2021 Sep 30, 2021 811-04889
N-CSR Open Document Open Filing N-CSR Dec 3, 2021 Sep 30, 2021 811-04889
3 Open Document Open Filing OWNERSHIP DOCUMENT Dec 2, 2021 Nov 30, 2021
NPORT-P Open Document Open Filing Nov 12, 2021 Sep 30, 2021 811-04889
NPORT-P Open Document Open Filing Aug 26, 2021 Jun 30, 2021 811-04889
N-PX Open Document Open Filing N-PX Aug 19, 2021 Jun 30, 2021 811-04889
40-17G Open Document Open Filing 40-17G Jul 28, 2021 811-04889
POS EX Open Document Open Filing POS EX Jul 2, 2021 333-195327
N-CSRS Open Document Open Filing N-CSRS Jun 4, 2021 Mar 31, 2021 811-04889
NPORT-P Open Document Open Filing May 26, 2021 Mar 31, 2021 811-04889
DEF 14A Open Document Open Filing DEF 14A Apr 13, 2021 Jun 10, 2021 811-04889
NPORT-P Open Document Open Filing Feb 26, 2021 Dec 31, 2020 811-04889
SC 13G/A Open Document Open Filing MS AMENDMENT Feb 12, 2021 005-40606
POS EX Open Document Open Filing POS EX Jan 5, 2021 333-195327
N-CEN Open Document Open Filing Dec 10, 2020 Sep 30, 2020 811-04889
N-CSR Open Document Open Filing N-CSR Dec 4, 2020 Sep 30, 2020 811-04889
NPORT-P Open Document Open Filing Nov 18, 2020 Sep 30, 2020 811-04889
4 Open Document Open Filing 4 Oct 26, 2020 Oct 26, 2020
4 Open Document Open Filing 4 Oct 21, 2020 Oct 21, 2020
4 Open Document Open Filing 4 Sep 23, 2020 Sep 23, 2020
POS EX Open Document Open Filing POS EX Sep 10, 2020 333-195327
3 Open Document Open Filing 3 Aug 28, 2020 Aug 27, 2020
NPORT-P Open Document Open Filing Aug 25, 2020 Jun 30, 2020 811-04889
N-PX Open Document Open Filing N-PX Aug 17, 2020 Jun 30, 2020 811-04889
40-17G Open Document Open Filing 40-17G Aug 6, 2020 811-04889
N-CSRS Open Document Open Filing N-CSRS Jun 5, 2020 Mar 31, 2020 811-04889
NPORT-P Open Document Open Filing May 28, 2020 Mar 31, 2020 811-04889
4 Open Document Open Filing 4 May 22, 2020 May 21, 2020
CORRESP Open Document Open Filing May 8, 2020
DEF 14A Open Document Open Filing DEF 14A Apr 14, 2020 Jun 11, 2020 811-04889
4 Open Document Open Filing 4 Mar 17, 2020 Mar 17, 2020
NPORT-P Open Document Open Filing Feb 27, 2020 Dec 31, 2019 811-04889
SC 13G/A Open Document Open Filing MS AMENDMENT Feb 13, 2020 005-40606
N-CEN Open Document Open Filing Dec 12, 2019 Sep 30, 2019 811-04889
N-CSR Open Document Open Filing CERTIFIED ANNUAL SHAREHOLDER REPORT Dec 5, 2019 Sep 30, 2019 811-04889
NPORT-P Open Document Open Filing Nov 15, 2019 Sep 30, 2019 811-04889
NPORT-EX Open Document Open Filing Aug 29, 2019 Jun 30, 2019 811-04889
N-PX Open Document Open Filing N-PX Aug 15, 2019 Jun 30, 2019 811-04889
40-17G Open Document Open Filing 40-17G Aug 15, 2019 811-04889
POS EX Open Document Open Filing POST-EFFECTIVE AMENDMENT FILED SOLELY TO ADD EXHIBITS Jun 20, 2019 333-195327
N-CSRS Open Document Open Filing N-CSRS Jun 5, 2019 Mar 31, 2019 811-04889
DEF 14A Open Document Open Filing DEF 14A Apr 15, 2019 Jun 13, 2019 811-04889
POS EX Open Document Open Filing POST-EFFECTIVE AMENDMENT FILED SOLELY TO ADD EXHIBITS Mar 12, 2019 333-195327
N-Q Open Document Open Filing N-Q Feb 26, 2019 Dec 31, 2018 811-04889
SC 13G/A Open Document Open Filing MSSB AMENDMENT Feb 13, 2019 005-40606
4 Open Document Open Filing 4 Dec 26, 2018 Dec 26, 2018
3 Open Document Open Filing 3 Dec 19, 2018 Dec 13, 2018
N-CEN Open Document Open Filing Dec 13, 2018 Sep 30, 2018 811-04889
N-CSR Open Document Open Filing CERTIFIED ANNUAL SHAREHOLDER REPORT Dec 4, 2018 Sep 30, 2018 811-04889
4 Open Document Open Filing 4 Oct 25, 2018 Oct 25, 2018
4 Open Document Open Filing 4 Oct 17, 2018 Oct 17, 2018
N-Q Open Document Open Filing N-Q Aug 28, 2018 Jun 30, 2018 811-04889
N-PX Open Document Open Filing N-PX Aug 20, 2018 Jun 30, 2018 811-04889
40-17G Open Document Open Filing 40-17G Jul 27, 2018 811-04889
N-CSRS Open Document Open Filing N-CSRS Jun 1, 2018 Mar 31, 2018 811-04889
NSAR-A Open Document Open Filing ANSWER FILE May 25, 2018 Mar 31, 2018 811-04889
DEF 14A Open Document Open Filing DEF 14A Apr 18, 2018 Jun 14, 2018 811-04889
POS EX Open Document Open Filing POST-EFFECTIVE AMENDMENT FILED SOLELY TO ADD EXHIBITS Apr 18, 2018 333-195327
N-Q Open Document Open Filing N-Q Feb 23, 2018 Dec 31, 2017 811-04889
SC 13G/A Open Document Open Filing MS AMENDMENT Feb 13, 2018 005-40606
4 Open Document Open Filing PRIMARY DOCUMENT Jan 29, 2018 Jan 25, 2018
3 Open Document Open Filing PRIMARY DOCUMENT Jan 18, 2018 Dec 19, 2017
N-CSR Open Document Open Filing CERTIFIED ANNUAL SHAREHOLDER REPORT Dec 5, 2017 Sep 30, 2017 811-04889
NSAR-B Open Document Open Filing ANSWER FILE Nov 27, 2017 Sep 30, 2017 811-04889
N-PX Open Document Open Filing N-PX Aug 30, 2017 Jun 30, 2017 811-04889
N-Q Open Document Open Filing N-Q Aug 25, 2017 Jun 30, 2017 811-04889
40-17G Open Document Open Filing 40-17G Jul 27, 2017 811-04889
CORRESP Open Document Open Filing Jul 18, 2017
POS EX Open Document Open Filing POS EX Jun 19, 2017 333-195327
CORRESP Open Document Open Filing Jun 19, 2017
N-CSRS Open Document Open Filing N-CSRS Jun 2, 2017 Mar 31, 2017 811-04889
NSAR-A Open Document Open Filing NSAR-A May 25, 2017 Mar 31, 2017 811-04889
DEF 14A Open Document Open Filing PRE 14A Apr 18, 2017 Jun 15, 2017 811-04889
N-Q Open Document Open Filing N-Q Feb 24, 2017 Dec 31, 2016 811-04889
SC 13G/A Open Document Open Filing MSSB YE AMENDMENT Feb 13, 2017 005-40606
N-CSR Open Document Open Filing N-CSR Dec 1, 2016 Sep 30, 2016 811-04889
NSAR-B Open Document Open Filing NSAR-B Nov 22, 2016 Sep 30, 2016 811-04889
N-PX Open Document Open Filing N-PX Aug 29, 2016 Jun 30, 2016 811-04889
N-Q Open Document Open Filing N-Q Aug 26, 2016 Jun 30, 2016 811-04889
40-17G Open Document Open Filing 40-17G Jul 14, 2016 811-04889
N-CSRS Open Document | Data Open Filing N-CSRS Jun 3, 2016 Mar 31, 2016 811-04889
NSAR-A Open Document Open Filing NSAR-A May 25, 2016 Mar 31, 2016 811-04889
DEF 14A Open Document Open Filing DEF 14A Apr 18, 2016 Jun 14, 2016 811-04889
CORRESP Open Document Open Filing Apr 18, 2016
PRE 14A Open Document Open Filing PRE 14A Apr 4, 2016 Jun 14, 2016 811-04889
N-Q Open Document Open Filing N-Q Feb 26, 2016 Dec 31, 2015 811-04889
SC 13G/A Open Document Open Filing MSSB AMENDMENT Feb 11, 2016 005-40606
4 Open Document Open Filing 4 Jan 7, 2016 Jan 6, 2016
N-CSR Open Document Open Filing N-CSR Dec 2, 2015 Sep 30, 2015 811-04889
NSAR-B Open Document Open Filing NSAR-B Nov 24, 2015 Sep 30, 2015 811-04889
N-PX Open Document Open Filing N-PX Aug 28, 2015 Jun 30, 2015 811-04889
N-Q/A Open Document Open Filing N-Q/A Aug 27, 2015 Jun 30, 2015 811-04889
N-Q Open Document Open Filing N-Q Aug 27, 2015 Jun 30, 2015 811-04889
40-17G Open Document Open Filing 40-17G Aug 26, 2015 811-04889
4 Open Document Open Filing 4 Jun 29, 2015 Jun 29, 2015
N-CSRS Open Document Open Filing N-CSRS Jun 2, 2015 Mar 31, 2015 811-04889
NSAR-A Open Document Open Filing NSAR-A May 28, 2015 Mar 31, 2015 811-04889
DEF 14A Open Document Open Filing DEF 14A Apr 20, 2015 Jun 4, 2015 811-04889
N-Q Open Document Open Filing N-Q Feb 26, 2015 Dec 31, 2014 811-04889
SC 13G/A Open Document Open Filing ST MSSB AMENDMENT Feb 17, 2015 005-40606
SC 13G/A Open Document Open Filing AMENDED SCHEDULE 13G Jan 12, 2015 005-40606
NSAR-B Open Document Open Filing NSAR - B Nov 28, 2014 Sep 30, 2014 811-04889
N-CSR Open Document Open Filing N-CSR Nov 26, 2014 Sep 30, 2014 811-04889
POS AMI Open Document Open Filing POS AMI Oct 15, 2014 811-04889
40-17G Open Document Open Filing 40-17G Sep 18, 2014 811-04889
N-PX Open Document Open Filing N-PX Aug 29, 2014 Jun 30, 2014 811-04889
N-Q Open Document Open Filing N-Q Aug 27, 2014 Jun 30, 2014 811-04889
CORRESP Open Document Open Filing Jul 21, 2014
40-APP/A Open Document Open Filing 40-APP Jul 18, 2014 812-14306
4 Open Document Open Filing 4 Jul 11, 2014 Jun 24, 2014
UPLOAD Open Document Open Filing Jul 9, 2014
4 Open Document Open Filing 4 Jul 1, 2014 Jun 24, 2014
4 Open Document Open Filing 4 Jun 30, 2014 Jun 24, 2014
4 Open Document Open Filing 4 Jun 30, 2014 Jun 24, 2014
4 Open Document Open Filing 4 Jun 30, 2014 Jun 24, 2014
4 Open Document Open Filing 4 Jun 30, 2014 Jun 24, 2014
N-CSRS Open Document Open Filing N-CSRS Jun 6, 2014 Mar 31, 2014 811-04889
497 Open Document Open Filing 497 May 30, 2014 333-195327
EFFECT Open Document Open Filing May 29, 2014 333-195327
NSAR-A Open Document Open Filing NSAR A May 29, 2014 Mar 31, 2014 811-04889
N-2/A Open Document Open Filing N-2/A May 28, 2014 811-04889,333-195327
CORRESP Open Document Open Filing May 23, 2014
N-2/A Open Document Open Filing N-2/A May 23, 2014 811-04889,333-195327
40-APP Open Document Open Filing 40-APP May 9, 2014 812-14306
DEF 14A Open Document Open Filing DEF 14A Apr 30, 2014 Jun 9, 2014 811-04889
N-2 Open Document Open Filing N-2 Apr 16, 2014 811-04889,333-195327
SC 13G/A Open Document Open Filing MSSB AMENDMENT Apr 9, 2014 005-40606
N-Q Open Document Open Filing N-Q Feb 24, 2014 Dec 31, 2013 811-04889
SC 13G/A Open Document Open Filing ST MSSB AMENDMENT Feb 10, 2014 005-40606
SC 13G/A Open Document Open Filing AMENDED SCHEDULE 13G Jan 13, 2014 005-40606