| 27.06.2025 15:22 | HGEN | Result of AGM | RNS |
| 24.06.2025 16:14 | HGEN | Holding(s) in Company | RNS |
| 20.06.2025 12:02 | TEK, SUN, RKH | UK shareholder meetings calendar - next 7 days | Alliance |
| 03.06.2025 15:36 | HGEN | Posting of Circular and Notice of AGM | RNS |
| 14.05.2025 07:00 | HGEN | Publication of annual hydrogen sector review | Reach |
| 14.05.2025 07:00 | HGEN | Q1 2025 NAV and Portfolio Update | RNS |
| 12.05.2025 07:00 | HGEN | Notice of Financial Adviser & Corporate Broker | RNS |
| 09.05.2025 07:00 | HGEN | Q1 NAV, Portfolio Update & Investor Presentation | RNS |
| 30.04.2025 11:19 | HGEN, TRI, VID | SMALL-CAP WINNERS & LOSERS: Trifast "confident" after "strong" year | Alliance |
| 30.04.2025 10:06 | HGEN | Annual Results - Correction | RNS |
| 30.04.2025 09:41 | HGEN | Update: Notice of Webcast | Reach |
| 30.04.2025 07:00 | HGEN | Publication of 2024 Sustainability Report | Reach |
| 30.04.2025 07:00 | HGEN | Annual Results | RNS |
| 25.04.2025 16:54 | GEMD, HGEN, TON | UK earnings, trading statements calendar - next 7 days | Alliance |
| 25.04.2025 07:00 | HGEN | Notice of Results | RNS |
| 10.04.2025 09:19 | HGEN | Investment Advisor Update | RNS |
| 21.03.2025 18:16 | HGEN | Directorate Change | RNS |
| 11.03.2025 07:00 | HGEN | IN BRIEF: HydrogenOne investee Elcogen undertakes green steel project | Alliance |
| 10.03.2025 07:00 | HGEN | Elcogen announces SYRIUS Project in green steel | Reach |
| 28.02.2025 07:00 | HGEN | QuotedData's Weekly News Show | Reach |
| 21.02.2025 12:06 | HGEN | HydrogenOne rises as Finnish green hydrogen plant begins operations | Alliance |
| 21.02.2025 10:05 | JCGI, HGEN, VID | SMALL-CAP WINNERS & LOSERS: Alibaba rally boosts JPMorgan China Growth | Alliance |
| 21.02.2025 07:00 | HGEN | Sunfire: Finnish hydrogen plant online | Reach |
| 03.02.2025 07:00 | HGEN | Notice of NAV and Portfolio Update | RNS |
| 17.01.2025 11:20 | HGEN | HydrogenOne Capital Growth secures investment in Estonia | Alliance |
| 17.01.2025 07:00 | HGEN | Elcogen secures €5 mn investment from SmartCap | RNS |
| 09.01.2025 13:54 | HGEN | IN BRIEF: HydrogenOne investee secures EUR200 million in funding | Alliance |
| 09.01.2025 07:00 | HGEN | Sunfire secures €200m in Guaranteed Financing | RNS |
| 20.11.2024 07:00 | HGEN | Sunfire awarded a new 50 MW electrolyser contract | Reach |
| 14.11.2024 11:10 | HGEN, PCA, ENQ | SMALL-CAP WINNERS & LOSERS: Palace Capital sees revenue, profit fall | Alliance |
| 14.11.2024 07:00 | HGEN | Portfolio Update - HH2E | RNS |
| 12.11.2024 16:40 | HGEN | HydrogenOne's Elcogen secures EUR24.9 million green energy grant | Alliance |
| 12.11.2024 07:00 | HGEN | Elcogen secures €25 million grant | Reach |
| 08.11.2024 11:22 | HGEN | HydrogenOne shares fall amid portfolio company fundraising woes | Alliance |
| 08.11.2024 11:16 | CNE, HGEN | SMALL-CAP WINNERS & LOSERS: HydrogenOne says bad news for HH2E | Alliance |
| 08.11.2024 07:00 | HGEN | Portfolio Update - HH2E | RNS |
| 06.11.2024 11:14 | ASC, HGEN, IGC | SMALL-CAP WINNERS & LOSERS: India Capital continues NAV growth | Alliance |
| 30.10.2024 07:00 | HGEN | Notice of NAV & Portfolio Update | RNS |
| 16.09.2024 10:48 | NCC, HGEN, TTG | SMALL-CAP WINNERS & LOSERS: TT Electronics slumps; HydrogenOne up | Alliance |
| 16.09.2024 07:00 | HGEN | Half-year Report | RNS |
| 09.09.2024 14:30 | WIL, MPE, HGEN | UK earnings, trading statements calendar - next 7 days | Alliance |
| 03.09.2024 07:00 | HGEN | Notice of Results | RNS |
| 31.07.2024 07:00 | HGEN | Q2 2024 NAV and Portfolio Update | RNS |
| 30.07.2024 07:00 | HGEN | Strohm contract award from TotalEnergies | Reach |
