| 09/02/23 | 07:00:08 | 9 Feb 2023 | | Mining Services Contract Awarded for Araguaia |
| 08/02/23 | 16:31:36 | 8 Feb 2023 | | TR-1: Notification of Major Holdings |
| 24/01/23 | 07:00:04 | 24 Jan 2023 | | Vermelho Nickel Cobalt Project EIA Submitted |
| 21/12/22 | 07:00:05 | 21 Dec 2022 | | Director/PDMR Shareholding |
| 15/12/22 | 07:00:04 | 15 Dec 2022 | | Araguaia remains on Schedule and on Budget |
| 14/12/22 | 10:20:39 | 14 Dec 2022 | | Rule 38.5_A - Horizon Therapeutics plc |
| 13/12/22 | 15:11:45 | 13 Dec 2022 | | Notice of Investor Presentation |
| 08/12/22 | 07:00:06 | 8 Dec 2022 | | First drawdown complete |
| 01/12/22 | 07:00:02 | 1 Dec 2022 | | Port Contract Awarded for Araguaia Nickel Project |
| 25/11/22 | 10:16:19 | 25 Nov 2022 | | Holding(s) in Company |
| 21/11/22 | 07:00:08 | 21 Nov 2022 | | Long-term power secured for Araguaia |
| 16/11/22 | 12:57:52 | 16 Nov 2022 | | Holding(s) in Company |
| 11/11/22 | 07:00:05 | 11 Nov 2022 | | Q3 Financial Results |
| 09/11/22 | 07:01:02 | 9 Nov 2022 | | Notification of Major Holdings |
| 09/11/22 | 07:00:08 | 9 Nov 2022 | | Holding(s) in Company |
| 08/11/22 | 15:04:39 | 8 Nov 2022 | | Completion of Fundraise |
| 04/11/22 | 15:40:58 | 4 Nov 2022 | | Result of General Meeting |
| 03/11/22 | 07:00:08 | 3 Nov 2022 | | Electro-Mechanical Contract Awarded for Araguaia |
| 17/10/22 | 07:00:10 | 17 Oct 2022 | | Feasibility Study Contract Awarded for Vermelho |
| 12/10/22 | 17:42:12 | 12 Oct 2022 | | Posting of Circular and Notice of General Meeting |
| 05/10/22 | 12:53:01 | 5 Oct 2022 | | Operational Update Presentation |
| 05/10/22 | 07:05:39 | 5 Oct 2022 | | Results of oversubscribed Fundraise |
| 04/10/22 | 17:14:43 | 4 Oct 2022 | | Proposed Equity Fundraise of Approx £61.7 Million |
| 04/10/22 | 17:13:20 | 4 Oct 2022 | | Araguaia Nickel Project Construction on Schedule |
| 26/09/22 | 07:00:13 | 26 Sept 2022 | | Araguaia approved as Strategic Minerals Project |
| 15/08/22 | 07:00:05 | 15 Aug 2022 | | INTERIM RESULTS SIX MONTHS ENDED 30 JUNE 2022 |
| 09/08/22 | 07:00:03 | 9 Aug 2022 | | Industrial Civil Works Contract Award |
| 19/07/22 | 07:00:07 | 19 Jul 2022 | | Community Development Agreement with SENAI |
| 13/07/22 | 08:00:06 | 13 Jul 2022 | | Award of Options |
| 13/07/22 | 07:00:06 | 13 Jul 2022 | | Award of key process plant contracts completed |
| 05/07/22 | 07:00:06 | 5 Jul 2022 | | Exercise of Options and Total Voting Rights |
| 31/05/22 | 11:37:52 | 31 May 2022 | | Share Consolidation and Total Voting Rights |
| 24/05/22 | 16:22:42 | 24 May 2022 | | Results of Annual General Meeting |
| 24/05/22 | 07:00:05 | 24 May 2022 | | AGM Presentation |
| 20/05/22 | 07:00:06 | 20 May 2022 | | Horizonte Publishes 2021 Sustainability Report |
| 19/05/22 | 07:00:09 | 19 May 2022 | | Breaking Ground at the Araguaia Nickel Project |
| 16/05/22 | 07:00:06 | 16 May 2022 | | Q1 Financial Results |
| 11/05/22 | 07:00:02 | 11 May 2022 | | Earthworks Contract Award at Araguaia |
| 04/05/22 | 07:00:02 | 4 May 2022 | | Appointment of Head of Sustainability |
| 28/04/22 | 07:00:13 | 28 Apr 2022 | | Notice of AGM |
| 20/04/22 | 07:00:05 | 20 Apr 2022 | | Notification of Major Holdings |
| 19/04/22 | 07:00:11 | 19 Apr 2022 | | Notification of Major Holdings |
| 14/04/22 | 07:00:05 | 14 Apr 2022 | | Notification of Major Holdings |
| 08/04/22 | 07:00:03 | 8 Apr 2022 | | Exercise of Options and Total Voting Rights |
| 07/04/22 | 15:00:00 | 7 Apr 2022 | | Director Dealings |
| 31/03/22 | 07:00:07 | 31 Mar 2022 | | Completion of Fundraise |
| 28/03/22 | 07:00:08 | 28 Mar 2022 | | Final Results for the Year Ended 31 December 2021 |
| 24/03/22 | 07:00:10 | 24 Mar 2022 | | Appointment of Non-Executive Directors |
| 22/03/22 | 07:00:07 | 22 Mar 2022 | | Award of EPCM Contract to AFRY |
| 16/03/22 | 07:00:06 | 16 Mar 2022 | | Closing of $346.2M Senior Debt Facility & $25M COF |
