Dividend Declaration

JANUS HENDERSON FUND MANAGEMENT UK LIMITED

HENDERSON HIGH INCOME TRUST PLC

LEGAL ENTITY IDENTIFIER 213800OEXAGFSF7Y6G11

29 November 2024

HENDERSON HIGH INCOME TRUST PLC

PAYMENT OF FOURTH INTERIM DIVIDEND

Henderson High Income Trust plc announces that a fourth interim dividend of 2.675p per ordinary share of 5p, in respect of the year ending 31 December 2024, will be paid on 31 January 2025 to holders registered at the close of business on 13 December 2024. This dividend is to be paid from the Company's revenue account. The Company's shares will go ex-dividend on 12 December 2024.

With the increase in the fourth interim dividend, the total dividend for the year to 31 December 2024 will be 10.60p, an increase of 2.4% on the previous year and the Company's 12^th consecutive annual increase. The 10.60p dividend for the year to 31 December 2024 is expected, based on our current projections for the revenue account, to be fully covered by earnings with a surplus carried to the revenue reserves.

For further information please contact:

David Smith
Fund Manager
Henderson High Income Trust plc
Telephone: 020 7818 4443

Dan Howe
Head of Investment Trusts
Janus Henderson Investors
Telephone: 020 7818 4458

Harriet Hall

PR Director, Investment Trusts

Janus Henderson Investors

Telephone: 020 7818 2919