Invinity Energy Systems Plc — Report Publication Announcement 2026

Jun 1, 2026

National Storage Mechanism | Additional information

RNS Number : 5275G

Invinity Energy Systems PLC

01 June 2026

1 June 2026

Invinity Energy Systems plc

("Invinity" or the "Company")

Notice of AGM and Posting of Annual Report

Following the release on 1 June 2026 of the Company's 2025 Full Year Results, Invinity Energy Systems plc (AIM: IES), a leading global manufacturer of utility-grade energy storage, announces that the Company's Annual General Meeting ("AGM" or "the Meeting") will be held at The Lothbury Room, LG Floor, 131 Finsbury Pavement, London EC2A 1NT at 12.00 p.m. (UK Time) on Thursday 25 June 2025.

Notice of the AGM containing further information, along with the form of proxy, has been published on the Company's shareholder documents portal. For those who have opted to receive printed communications, hard copies of the Notice of the AGM and the Annual Report will be posted to shareholders shortly.

Voting

You are strongly encouraged to use your proxy vote. Shareholders can vote electronically via the Investor Centre app or by visiting https://uk.investorcentre.mpms.mufg.com/.

We encourage you to appoint the Chair of the Meeting as your proxy so that your vote will be counted if ultimately you (or any other proxy you might otherwise appoint) are not able to attend. Submitting a proxy will not preclude you from attending and voting at the meeting in person if you wish to do so.

If you need help with voting online or require a hard copy proxy form, please contact our Registrars, MUFG Corporate Markets by email at [email protected] or call on 0371 664 0300. Calls are charged at the standard geographic rate and will vary by provider. Calls outside the United Kingdom will be charged at the applicable international rate. Lines are open between 09:00 - 17:30, Monday to Friday excluding public holidays in England and Wales. Completed hard copy proxy forms should be returned to our Registrars at MUFG Corporate Markets, PXS 1, Central Square, 29 Wellington Street, Leeds, LS1 4DL no later than 12.00 p.m. on 23 June 2026.

Attending the Meeting

Due to capacity constraints, shareholders wishing to attend the AGM are requested to RSVP via email to [email protected] no later than 5.00 p.m. on Tuesday 23 June 2026.

Stay up to date with news from Invinity. Join the distribution list for the Company's monthly investor newsletter here.

Enquiries:

Invinity Energy Systems plc	+44 (0)20 4551 0361
Jonathan Marren, Chief Executive Officer Joe Worthington, Senior Director, Corporate Affairs
Canaccord Genuity (Nominated Adviser and Joint Broker)	+44 (0)20 7523 8000
Henry Fitzgerald-O'Connor / Harry Pardoe / Charlie Hammond
VSA Capital (Joint Broker)	+44 (0)20 3005 5000
Andrew Monk / Andrew Raca

Notes to Editors

Invinity Energy Systems plc (AIM: IES) is a world-leading manufacturer of vanadium flow batteries for energy storage. Built in our factories in the UK and Canada, the Company's proven, commercialised, longer duration energy storage technology has been deployed at scale and dispatched gigawatt-hours of electricity for customers across the world.

Invinity's safe, scalable and durable battery technology is a trusted and safer alternative to lithium-ion batteries. Endurium VFBs are engineered for heavy-duty, high throughput applications, they don't wear out, cannot catch fire and are designed to be operated for 30 years or more. Our products address the challenges of our global energy system, unlocking the power of renewable generation by delivering energy storage without limits.

To find out more, visit invinity.com, sign up to our monthly Investor Newsletter here or contact Investor Relations on via +44 (0)20 4551 0361 or [email protected].

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