19 December 2025

CAP-XX Limited

("CAP-XX" or "the Company")

Receipt of R&D tax credit

CAP-XX Limited (AIM: CPX), a global leader in supercapacitor technology, is pleased to announce that, further to the Company's announcement of 7 November 2025, the Australian Tax Office has approved the Company's R&D tax credit of A$1.75m and these funds have been received by the Company.

The Company's current cash position is A$2.97m.

For further information contact:

CAP-XX Limited

Dr Graham Cooley (Chairman)                                                                            +61 (2) 9157 0000

Lars Stegmann (Chief Executive Officer)

Allenby Capital (Nominated Adviser and Broker)

David Hart/Piers Shimwell (Corporate Finance)                                                    +44 (0) 20 3328 5656

Jos Pinnington/Tony Quirke (Sales and Corporate Broking)

Notes to Editors:

CAP-XX (LSE: CPX) is a leader in the design and manufacture of thin, flat supercapacitors and energy management systems used in portable and small-scale electronic devices, and to an increasing extent, in larger applications such as automotive and renewable energy. The unique feature of CAP-XX supercapacitors is their very high-power density and high energy storage capacity in a space-efficient prismatic package. These attributes are essential in power-hungry consumer and industrial electronics and deliver similar benefits in automotive and other transportation applications.

For more information about CAP-XX, visit www.cap-xx.com