Commencement of Phase III Drilling

GreenRoc Strategic Materials Plc (AIM: GROC), a company focused on the development of critical mineral projects in Greenland, is pleased to announce that the Phase III drilling programme has begun at the Amitsoq graphite deposit in South Greenland.

After mobilising timber for drill platform construction in early July 2026 and building the first three drill platforms, the Company successfully mobilised drill rig and associated equipment on 15 July 2026. The drill programme is planned to proceed from now and throughout August (see also RNS of 8 April 2026).

Drilling of the first hole AM_DD_039 began on 18 July and was completed on 23 July. Graphite ore in the hole was intersected from 107.15m to 119.51m, which corresponds to a true ore thickness of 9.7m. The ore represents the Lower Graphite Layer and was at the expected depth and thickness for the area. The Upper Graphite Layer is not present in this part of the deposit. Geotechnical data has been collected from the core and the team is currently conducting hydrogeological testing, including installation of a downhole groundwater monitoring probe, which will provide additional data for the Pre-Feasibility Study planned to be initiated later in the year. The graphite ore intersected will now be sampled and sent for laboratory analysis of the graphite content.

Figure 1. Drilling at Amitsoq conducted by drilling team from MEDL and a box of about 5m of drill core with Lower Graphite Layer ore intersection

GreenRoc's CEO, Stefan Bernstein, commented:

"I am very pleased that our drilling programme has now commenced. Our team in Greenland has worked hard during the mobilisation and getting the rig and equipment up and running. The intersection of graphite ore at the expected depth and of the expected thickness is an excellent start to the programme and reflects the continuity of the Amitsoq graphite orebodies."