AIM:IES · Industrials · Energy storage technology - manufacture and sale of vanadium flow battery (VFB) systems for long-duration energy storage, AIM-listed

Invinity Energy Systems plc

Invinity Energy Systems plc manufactures and sells vanadium flow battery (VFB) energy storage systems, principally the Endurium and legacy VS3 products, together with associated installation, integration, warranty and licence/royalty services. It targets long-duration energy storage (LDES) applications for utilities, governments, and commercial & industrial customers, with manufacturing in Scotland, England and Canada and operations/partnerships extending into the USA, China and India. The Company is AIM-listed (ticker IES) and was formed from the 2020 merger of Avalon Battery Corp and redT Energy plc; it redomiciled its parent from Jersey to England & Wales in January 2025.

Export the Invinity Energy Systems plc factsheetfree account Open the FY2025 report

AIM:IESClose, 19 Oct 2026

0.0% on the day−11.5% over a year

Market cap£101m
52-week range16.0p – 39.4p
Free cash flow yield−34.0%
Shares traded a day830k

Prices to 19 Oct 2026 · ratios on the FY2025 accounts · not investment advice

The company

Admitted25 Apr 2006
Registered officeOffice 3.03, 24 Chiswell Street, London, EC1Y 4TY (registered office per Note 1; a subsequent move to Office 207, New Broad Street House, 35 New Broad Street, London EC2M 1NH is noted on the Officers and Advisers page)
IncorporatedUnited Kingdom
Employees162
Reports inGBP
Companies House15892542
Websiteinvinity.com
Chief executiveJonathan Marren
Finance directorAdam Howard
ChairNeil O'Brien
AuditorBDO LLPclean opinion in all 10 reports read · going-concern uncertainty in 5 · 1 change of auditor
Adviser and brokerNominated Adviser and Joint Broker: Canaccord Genuity Limited; Joint Broker: VSA Capital
Next annual reportExpected 4 Jul 2027for the year to 31 Dec 2026

Share price and financials

17.7p at close on 19 Oct 2026 · 11 reported years, FY2015–FY2025

Years in viewFY2015 – FY2026

19 Oct 202617.7p−95.4% since 4 Jan 2016 0 traded

17.7p

Line	FY2015locked	FY2016locked	FY2017locked	FY2018locked	FY2019locked	FY2020locked	FY2021locked	FY2022locked
Revenue	13.3	15.5	16.9	6.5	13.4	15.9	16.9	16.6
Gross profit	(2.7)	(3.9)	(3.2)	(3.8)	(3.6)	(4.2)	(3.0)	(2.3)
Operating profit	(27.0)	(28.4)	(17.9)	(15.5)	(25.3)	(26.5)	(28.6)	(24.0)
Net finance cost	(0.64)	(0.86)	(0.73)	(0.40)	(0.67)	(0.72)	(0.85)	(0.97)
Profit before tax	(28.4)	(17.3)	(19.0)	(14.1)	(19.4)	(15.0)	(27.4)	(23.1)
Tax charge	0	0	0	0	0	0	0	0
Profit for the year	(23.7)	(27.4)	(26.2)	(19.2)	(31.0)	(21.6)	(16.9)	(15.6)
EBITDA	(14.4)	(24.9)	(16.1)	(12.6)	(31.6)	(26.4)	(27.6)	(24.1)
Basic EPS	(5.87p)	(5.49p)	(4.99p)	(8.88p)	(6.98p)	(10.96p)	(7.76p)	(7.91p)
Diluted EPS	(8.03p)	(11.25p)	(7.81p)	(11.65p)	(8.87p)	(5.08p)	(6.43p)	(9.39p)

GBP millions, negatives in brackets. Per-share lines in pence. later is what a following report restated the figure to; vs is a second reading that disagrees. The figure shown is the one the original filing printed, and both readings are kept. Click any figure: opens the report page it was read from, highlighted; shows how it was calculated. The share price above is drawn to the same columns: each close sits over the financial year it fell in.

2 figures

3 years, at a glance

GBP · %

Dashed: Operating margin, in % on its own scale — read its shape, not its height against the bars.

FY2025Revenue£8.2mOperating margin−300.9%