Henderson High Income Trust Regulatory News (HHI)

JANUS HENDERSON FUND MANAGEMENT UK LIMITED

HENDERSON HIGH INCOME TRUST PLC

LEGAL ENTITY IDENTIFIER 213800OEXAGFSF7Y6G11

19 March 2025

HENDERSON HIGH INCOME TRUST PLC

PAYMENT OF FIRST INTERIM DIVIDEND

Henderson High Income Trust plc announces that a first interim dividend of 2.675p per ordinary share of 5p, in respect of the year ending 31 December 2025, will be paid on 25 April 2025 to holders registered at the close of business on 4 April 2025. This dividend is to be paid from the Company's revenue account. The Company's shares will go ex-dividend on 3 April 2025.

For further information please contact:

David SmithFund ManagerHenderson High Income Trust plcTelephone: 020 7818 4443

Dan HoweHead of Investment TrustsJanus Henderson InvestorsTelephone: 020 7818 1818

Harriet Hall

PR Director, Investment Trusts

Janus Henderson Investors

Telephone: 020 7818 2919