UK small-cap RNS · 20 Oct 2026

The key announcements of UK small & mid caps under £2bn on 20 Oct 2026 – situations they move are marked, with the share price since.

Key = all announcements except routine filings (voting rights, buybacks, holdings, director forms), plus director dealings and holdings that are part of a situation. Not investment advice.

Date	Company	Mcap ↕	Type	Announcement
20 Oct	Diversified Energy Company DEC	£762m	Results	Timing of Third Quarter 2026 Results Diversified Energy Company (NYSE: DEC, LSE: DEC) (“Diversified” or the "Company") is pleased to announce that the Company plans to publish its operational and financial results for the quarter ended September 30, 2026 (the “third quarter results”) on …
20 Oct	Nostrum Oil & Gas NOG	£1.3m		Mandatory Purchase of SUNs and Initial Cash Amount Nostrum Oil & Gas PLC (the "Company", and together with its subsidiaries, the "Group") announced via RNS on 16 October 2026 (the "Announcement") that the Company's indirect subsidiary, Nostrum Oil & Gas Finance B.V.
20 Oct	Andrada Mining Limited ATM	£150m		Loan Note Conversion and issuance of equity Andrada Mining Limited (AIM: ATM, OTCQB: ATMTF), a tin producer with a portfolio of critical minerals mining and exploration assets in Namibia, announces that it has received notification today from BPM Investments Limited (“BPM”) in respect of five …
20 Oct	Earnz EARN	£15m		Completion of the Acquisition of GEM Newco Limited Engage with the Earnz PLC management team directly by asking questions, watching video summaries and seeing what other shareholders have to say.
20 Oct	Aterian ATN	£4.7m		CLN Conversion Aterian plc (LSE: ATN), the Africa-focused critical minerals exploration, development and trading company, announces that it has received a conversion notice dated 20 October 2026 in respect of £37,500 principal amount of the Company’s outstanding zero-coupon …
20 Oct	Gamma Communications GAMA	£984m	Overhang	Holding(s) in Company
20 Oct	Invinity Energy Systems IES	£101m	Fundraise	Result of Placing Further to the announcement at 7.00 a.m. on Tuesday 20 October 2026 (the “Launch Announcement”), Invinity Energy Systems plc (AIM: IES), a global leader in vanadium flow battery technology, is pleased to announce the results of the Placing.
20 Oct	Gulf Keystone Petroleum Ltd Com Shs GKP	£473m	Insider conviction	Director/PDMR Shareholding (“Gulf Keystone”, “GKP”, “the Group” or “the Company”)
20 Oct	Mortgage Advice Bureau (Holdings) MAB1	£211m	Insider conviction	Director/PDMR Shareholding
20 Oct	Blencowe Resources BRES	£31m		Final US$0.25 Million DFC Grant Funding Received US$5.0 million technical assistance grant now received in full following completion of the Orom-Cross DFS and DFC technical review
20 Oct	Avation AVAP	£84m	Director dealing	Warrant Grant And Directors’ Dealing The grant of warrants is pursuant to the authorities and powers given by shareholders at the Company's last annual general meeting.
20 Oct	Alien Metals Limited UFO	£8.3m		GreenTech drilling intersects copper near Whundo Drilling by GreenTech intersects copper near Whundo Deposit
20 Oct	Acceler8 Ventures AC8	£493m	Insider conviction	Director/PDMR Shareholding
20 Oct	Metals Exploration MTL	£516m		La India Construction Site - Fatal Accident Metals Exploration plc (AIM: MTL) (“Metals Exploration”, the “Company” or the “Group”), with sincere regret reports that an incident occurred at the La India project construction site, in Nicaragua, on 19 October 2026 which resulted in the loss of life of a …
20 Oct	Avation AVAP	£84m		Cancellation Of Treasury Shares Following the cancellation there are 59,220,801 ordinary shares in issue with no shares held in treasury.
20 Oct	Georgina Energy plc GEX	£32m		Mt Winter EPA 155 Site Inspection Georgina Energy Plc, (LSE: GEX.L), a helium, hydrogen and natural gas exploration and development company with strategic permits in Australia, provides the following update on the Mt Winter subsalt helium, hydrogen and hydrocarbons prospect in onshore …
20 Oct	Shuka Minerals SKA	£6.3m		Conversion of Loan & Issue of Equity Conversion of Loan, Creditor Settlement & Issue of Equity
20 Oct	Bay Capital BAY	£10m		Proposed Acquisition and Temporary Suspension Proposed Acquisition of Plenty Biologics and Temporary Suspension of Listing
20 Oct	Ondine Biomedical Inc. OBI	£55m		Capital Access Window - Ondine Biomedical Inc
20 Oct	Arkadian Strategic Metals Plc AKN	£2.1m		Horse Hill Sale and Finnsbo Update Arkadian Strategic Metals Plc / EPIC: AKN / Market: AIM / Sector: Mining
20 Oct	Galliford Try GFRD	£670m		Contract Galliford Try appointed to £5.0 billion Pagabo Major Works framework
20 Oct	Cornish Metals PLC TIN	£128m	Fundraise	Retail Offer Cornish Metals announces a conditional retail offer of new Ordinary Shares via RetailBook, alongside the proposed fundraising of approximately £135 million (before expenses) (or such other amount as may be agreed) to develop the South Crofty tin project …
20 Oct	Quantum Helium Limited QHE	£7.2m		Nine Month Oil Revenues and Helium Super Summit Nine-Month Oil Revenue in 2026 Exceeds Full-Year 2025
20 Oct	Gulf Keystone Petroleum Ltd Com Shs GKP	£473m		Operational & Corporate Update (“Gulf Keystone”, “GKP”, “the Group” or “the Company”)
20 Oct	Gulf Keystone Petroleum Ltd Com Shs GKP	£473m		Investor and analyst presentation regarding Gulf Keystone combination with ShaMaran Petroleum (“Gulf Keystone”, “GKP”, “the Group” or “the Company”)
20 Oct	Invinity Energy Systems IES	£101m	Offer	WRAP Retail Offer for up to £5,000,000 Invinity Energy Systems plc (AIM: IES), a global leader in vanadium flow battery (“VFB”) technology, is pleased to announce a retail offer via the Winterflood Retail Access Platform (“WRAP”) to raise up to £5,000,000 (the “Retail Offer”) through the issue of …
20 Oct	Acuity RM Group ACRM	£4.5m		Block Admission Application Acuity RM Group plc (AIM: ACRM), the software group specialising in the cybersecurity sector of the Governance, Risk and Compliance ("GRC") market, announces that an application has been made to AIM for a block admission of 56,372,729 ordinary shares of 0.1 …
20 Oct	Pulsar Helium Inc PLSR	£112m		Investor Webinar via Investor Meet Company The session will provide shareholders and interested parties with the opportunity to engage directly with management, with Thomas and Cliff responding to investor questions in real time.
20 Oct	Halo Minerals PLC HALO	£8.9m		New Investor Presentation and Company Webinar ("Halo Minerals", the "Company" and, together with its subsidiaries, the “Group”)
20 Oct	First Development Resources Plc FDR	£2.2m		Gold Drilling Underway at Lander West Follow-up Programme Targeting Extensions to Confirmed Bedrock Gold Mineralisation
20 Oct	Invinity Energy Systems IES	£101m	Fundraise	Proposed Fundraising of a minimum of £20 million Cornerstone Commitment of a minimum of £10 million from National Wealth Fund
20 Oct	Ondine Biomedical Inc. OBI	£55m	Fundraise	Result of Fundraise, Restoration of Trading & TVR All references to C$ in this announcement ("Announcement") are to Canadian Dollars.
20 Oct	Earnz EARN	£15m		Delay to Completion of the Acquisition The Acquisition is expected to complete on or before 23 October 2026 and Admission is expected to be the same day as the completion of the Acquisition.
20 Oct	Mercia Asset Management MERC	£130m		Notice of Interim Results Mercia Asset Management PLC (AIM: MERC), the proactive, regionally focused private capital asset manager with over £2.2billion of assets under management, will announce its interim results for the six months ended 30 September 2026 on Tuesday 1 December 2026.
20 Oct	Acg Acquisition Company Limited Cls A ACG	£447m		2026 Gediktepe Competent Person’s Report ACG Metals Limited ("ACG" or the "Company") is pleased to announce the publication of the full updated Competent Person's Report for its Gediktepe mine (the "2026 CPR").
20 Oct	Tharisa THS	£364m		Tharisa secures early renewable energy from Etana (Incorporated in the Republic of Cyprus with limited liability)
20 Oct	Oxford Nanopore Technologies ONT	£1,957m		Appointment of Chief Business Development Officer Oxford Nanopore Technologies plc (LSE: ONT), the company delivering a new generation of nanopore-based molecular sensing, today announces the appointment of Sebastian Kronmueller as Chief Business Development Officer (CBDO), effective 4 January 2027.
20 Oct	The Smarter Web Company Plc SWC	£198m		MORE Weekly Dividend: Preferred Dividend Rate 12% The Smarter Web Company notes that the weekly Preferred Dividend (ISIN: GB00C0HJ0D12; TIDM: MORE) for the week ending Friday 23 October 2026 will be £0.2301 per Preferred Share.
20 Oct	Truetide plc TRUE	£2.2m		Investment update - Paraytec This announcement replaces RNS Number 0231Z released by Truetide plc at 07.00 a.m. on 15 October 2026.
20 Oct	Savannah Resources SAV	£159m	Board change	CEO Share Purchase & Equity Incentive Plan Update Acquisition of 3.15 million Shares by CEO, Emanuel Proença
20 Oct	Wishbone Gold WSBN	£6.3m		Wide Gold & Copper Zones Identified at Red Setter Wishbone Gold Plc is pleased to announce that the latest assay results of the on-going drill programme at its Red Setter project have identified wide zones of gold and copper mineralisation.
20 Oct	Physiomics PYC	£2.2m		Contract Award Physiomics plc (AIM: PYC), a leading mathematical modelling, data science and biostatistics company supporting the development of new therapeutics and personalised medicine solutions, is pleased to announce a new contract award valued at £102,000 for …
20 Oct	Brave Bison Group BBSN	£87m	Takeover target	Day 53 Update on Acceptance Levels On 7 October 2026, Brave Bison announced the terms and conditions of its increased final* offer comprising of 180 pence in cash, 2.394 new Brave Bison Shares and 1 Bison CVR (which is a contingent value right which may deliver 20 pence in cash) (the “Final …
20 Oct	Wickes Group WIX	£467m	Trading update	Q3 Trading Update Wickes Group plc – Trading Update for the quarter ending 26 September 2026
20 Oct	Rockfire Resources ROCK	£17m		Molaoi Update Molaoi update - wide, strong grades intersected at HMO-021
20 Oct	XP Power Ltd. XPP	£533m	Trading update	Q3 Trading Update FY26 expectations unchanged with FY27 slightly ahead of market expectations
20 Oct	Genuit Group GEN	£726m	Trading update	Trading Update Trading Update for the nine months ended 30 September 2026
20 Oct	Gulf Marine Services GMS	£211m	Upgrade / downgrade cycle	3rd Quarter Results (‘Gulf Marine Services’, ‘GMS’, ‘the Company’ or ‘the Group’)
20 Oct	GB Group GBG	£357m	Sale process / strategic review	Trading Statement 4.5% first half revenue growth1 in core segments driven by Location and EMEA Identity
20 Oct	United Oil & Gas UOG	£10m	Results	Positive Drill Rig Study Results United Oil & Gas PLC / Index: AIM / Epic: UOG / Sector: Oil & Gas
20 Oct	Gear4music (Holdings) G4M	£51m	Trading update	Half Year Trading Update - Revenue growth in line with Board expectations against very strong prior-year comparatives
20 Oct	Ixico IXI	£17m	Trading update	Trading Update Trading update for year ending 30 September 2026
20 Oct	Optima Health OPT	£268m	Trading update	Half Year Trading Update (“Optima”, the “Company”, and, together with its subsidiaries, the “Group”)
20 Oct	Shearwater Group SWG	£17m		Central Government Cyber Security Contract Win £1.7 million Central Government Cyber Security Contract Win
20 Oct	Cropper (James) CRPR	£69m	Trading update	Trading Update Strong first half performance; full-year expected to be ahead of current market expectations
20 Oct	Trifast TRI	£116m	Trading update	Trading Update Trifast plc ("Trifast" or the "Group", LSE: TRI.L), the international specialist in the design, engineering, manufacture, and distribution of high-quality engineered fastenings, provides a trading update for the six months ended 30 September 2026 (‘H1 FY27’ …
20 Oct	B.P. Marsh & Partners BPM	£235m	Results	Half-year Results Marsh & Partners Plc (AIM: BPM), the specialist private equity investor in early-stage financial services businesses, announces its unaudited Group Half Year Results for the six months to 31 July 2026 (the "Period").
20 Oct	Capita CPI	£344m		Capital Market Event Update Capita today announces that it is postponing its Capital Market Event, previously planned for 4th November, as the Group maintains its focus on improving the service delivery on the Civil Service Pension Scheme contract.
20 Oct	Gulf Keystone Petroleum Ltd Com Shs GKP	£473m	Large acquisition / reverse takeover	Gulf Keystone to combine with ShaMaran Petroleum (“Gulf Keystone”, “GKP”, the “Group” or the “Company”)
20 Oct	Cornish Metals PLC TIN	£128m	Fundraise	Proposed Fundraising of approximately £135 million to develop the South Crofty tin project Entry into 6 year offtake agreement with Glencore
20 Oct	Gulf Keystone Petroleum Ltd Com Shs GKP	£473m	Large acquisition / reverse takeover	Gulf Keystone går samman med ShaMaran Petroleum (”ShaMaran” eller ”SNM”) meddelar att de har undertecknat ett bermudiskt fusionsavtal (”Bermuda-fusionsavtalet”) och ett kombinationsavtal (”Kombinationsavtalet”) för att slå samman sina verksamheter (”Transaktionen”).
20 Oct	Kenmare Resources (CDI) KMR	£210m		Response to Mozambican media reports regarding Implementation Agreement Kenmare Resources plc (LSE:KMR, ISE:KMR), one of the leading global producers of titanium minerals and zircon, which operates the Moma Titanium Minerals Mine (the "Mine" or "Moma") in northern Mozambique, notes the recent reports in the Mozambican media …
20 Oct	Sabre Insurance Group SBRE	£445m	Trading update	Trading Update 20 October 2026 Sabre Insurance Group plc Trading Update Full-year profit guidance reiterated as premium growth continues
20 Oct	BSF Enterprise BSFA	£2.2m		Foundational US Patent Underpins Business Strategy US Patent Allowance - Foundational Macromolecular Crowding Technology
20 Oct	Mode Global Holdings MODE	£0.5m		Allotment Of Shares And Total Voting Rights R8 announces that it has received notice to convert £25,500 of convertible loan notes (“CLNs”) into 21,794,871 new Ordinary Shares of the Company.
20 Oct	Avation AVAP	£84m		Publication Of Audited Financial Statements The annual report may be downloaded from the investor relations section of the Company's website at www.avation.net.