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Top FTSE AIM All-Share Companies by Market Cap and Stocks in 2025

This is the list of the largest public listed companies in the FTSE AIM All-Share index ranked by market capitalization, together with links to their reference stock, sector and industry.

FTSE AIM All-Share Chart & Analysis

Top FTSE AIM All-Share Companies Ranking by Market Cap as of July 1, 2025

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Ranking Company Stock Market Cap (USD) Country Sector Industry
301 Baron Oil plc BOIL wb_incandescent $28.9 M United Kingdom UK Energy UK Oil & Gas E&P
302 James Cropper plc CRPR wb_incandescent $28.9 M United Kingdom UK Basic Materials UK Paper & Paper Products
303 Tissue Regenix Group plc TRX wb_incandescent $28.9 M United Kingdom UK Healthcare UK Biotechnology
304 Sosandar plc SOS wb_incandescent $28.7 M United Kingdom UK Consumer Discretionary UK Internet Retail
305 NAHL Group plc NAH wb_incandescent $28.5 M United Kingdom UK Communication Services UK Advertising Agencies
306 Provexis plc PXS wb_incandescent $27.9 M United Kingdom UK Healthcare UK Drug Manufacturers—Specialty & Generic
307 The Conygar Investment Company plc CIC wb_incandescent $27.9 M United Kingdom UK Real Estate UK Real Estate—Diversified
308 TPXimpact Holdings PLC TPX wb_incandescent $27.6 M United Kingdom UK Technology UK Information Technology Services
309 Eden Research plc EDEN wb_incandescent $27.5 M United Kingdom UK Basic Materials UK Agricultural Inputs
310 Prospex Energy plc PXEN wb_incandescent $27.2 M United Kingdom UK Energy UK Oil & Gas E&P
311 Inspiration Healthcare Group plc IHC wb_incandescent $27.1 M United Kingdom UK Healthcare UK Medical Devices
312 Petro Matad Limited MATD wb_incandescent $27.0 M United Kingdom UK Energy UK Oil & Gas E&P
313 Tavistock Investments plc TAVI wb_incandescent $26.5 M United Kingdom UK Financials UK Capital Markets
314 Smartspace Software plc SMRT wb_incandescent $25.8 M

(Jan. 1, 2024)

 United Kingdom UK Technology UK Software—Application
315 Mothercare plc MTC wb_incandescent $25.6 M United Kingdom UK Consumer Discretionary UK Specialty Retail
316 Corcel plc CRCL wb_incandescent $25.4 M United Kingdom UK Basic Materials UK Other Industrial Metals & Mining
317 Portmeirion Group plc PMP wb_incandescent $25.3 M United Kingdom UK Consumer Discretionary UK Furnishings, Fixtures & Appliances
318 Altitude Group plc ALT wb_incandescent $24.6 M United Kingdom UK Technology UK Software—Application
319 Tekcapital plc TEK wb_incandescent $24.4 M United Kingdom UK Technology UK Software—Application
320 Mind Gym plc MIND wb_incandescent $24.1 M United Kingdom UK Industrials UK Specialty Business Services
321 Trinity Exploration & Production plc TRIN wb_incandescent $24.1 M

(July 1, 2024)

 United Kingdom UK Energy UK Oil & Gas E&P
322 essensys plc ESYS wb_incandescent $24.0 M United Kingdom UK Technology UK Software—Application
323 Itaconix plc ITX wb_incandescent $23.9 M United States US Basic Materials US Specialty Chemicals
324 SysGroup plc SYS wb_incandescent $23.4 M United Kingdom UK Technology UK Software—Infrastructure
325 Zinc Media Group plc ZIN wb_incandescent $23.3 M United Kingdom UK Communication Services UK Entertainment
326 Polarean Imaging plc POLX wb_incandescent $23.2 M United States US Healthcare US Medical Devices
327 Arecor Therapeutics plc AREC wb_incandescent $23.1 M United Kingdom UK Healthcare UK Biotechnology
328 FireAngel Safety Technology Group plc FA. wb_incandescent $23.1 M

(Jan. 1, 2024)

 United Kingdom UK Industrials UK Security & Protection Services
329 Checkit plc CKT wb_incandescent $23.0 M United Kingdom UK Technology UK Software—Application
330 Blackbird plc BIRD wb_incandescent $22.6 M United Kingdom UK Technology UK Software—Application

Top FTSE AIM All-Share Companies Ranking by Market Cap as of July 1, 2025

301. Baron Oil plc

Company Profile: Baron Oil plc
Market Cap (USD): $28.9 M
Stock: BOIL wb_incandescent
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

302. James Cropper plc

Company Profile: James Cropper plc
Market Cap (USD): $28.9 M
Stock: CRPR wb_incandescent
Country: United Kingdom
Sector: UK Basic Materials
Industry: UK Paper & Paper Products

303. Tissue Regenix Group plc

Company Profile: Tissue Regenix Group plc
Market Cap (USD): $28.9 M
Stock: TRX wb_incandescent
Country: United Kingdom
Sector: UK Healthcare
Industry: UK Biotechnology

304. Sosandar plc

Company Profile: Sosandar plc
Market Cap (USD): $28.7 M
Stock: SOS wb_incandescent
Country: United Kingdom
Sector: UK Consumer Discretionary
Industry: UK Internet Retail

305. NAHL Group plc

Company Profile: NAHL Group plc
Market Cap (USD): $28.5 M
Stock: NAH wb_incandescent
Country: United Kingdom
Sector: UK Communication Services
Industry: UK Advertising Agencies

306. Provexis plc

Company Profile: Provexis plc
Market Cap (USD): $27.9 M
Stock: PXS wb_incandescent
Country: United Kingdom
Sector: UK Healthcare
Industry: UK Drug Manufacturers—Specialty & Generic

307. The Conygar Investment Company plc

Company Profile: The Conygar Investment Company plc
Market Cap (USD): $27.9 M
Stock: CIC wb_incandescent
Country: United Kingdom
Sector: UK Real Estate
Industry: UK Real Estate—Diversified

308. TPXimpact Holdings PLC

Company Profile: TPXimpact Holdings PLC
Market Cap (USD): $27.6 M
Stock: TPX wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Information Technology Services

309. Eden Research plc

Company Profile: Eden Research plc
Market Cap (USD): $27.5 M
Stock: EDEN wb_incandescent
Country: United Kingdom
Sector: UK Basic Materials
Industry: UK Agricultural Inputs

310. Prospex Energy plc

Company Profile: Prospex Energy plc
Market Cap (USD): $27.2 M
Stock: PXEN wb_incandescent
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

311. Inspiration Healthcare Group plc

Company Profile: Inspiration Healthcare Group plc
Market Cap (USD): $27.1 M
Stock: IHC wb_incandescent
Country: United Kingdom
Sector: UK Healthcare
Industry: UK Medical Devices

312. Petro Matad Limited

Company Profile: Petro Matad Limited
Market Cap (USD): $27.0 M
Stock: MATD wb_incandescent
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

313. Tavistock Investments plc

Company Profile: Tavistock Investments plc
Market Cap (USD): $26.5 M
Stock: TAVI wb_incandescent
Country: United Kingdom
Sector: UK Financials
Industry: UK Capital Markets

314. Smartspace Software plc

Company Profile: Smartspace Software plc
Market Cap (USD): $25.8 M (Jan. 1, 2024)
Stock: SMRT wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Software—Application

315. Mothercare plc

Company Profile: Mothercare plc
Market Cap (USD): $25.6 M
Stock: MTC wb_incandescent
Country: United Kingdom
Sector: UK Consumer Discretionary
Industry: UK Specialty Retail

316. Corcel plc

Company Profile: Corcel plc
Market Cap (USD): $25.4 M
Stock: CRCL wb_incandescent
Country: United Kingdom
Sector: UK Basic Materials
Industry: UK Other Industrial Metals & Mining

317. Portmeirion Group plc

Company Profile: Portmeirion Group plc
Market Cap (USD): $25.3 M
Stock: PMP wb_incandescent
Country: United Kingdom
Sector: UK Consumer Discretionary
Industry: UK Furnishings, Fixtures & Appliances

318. Altitude Group plc

Company Profile: Altitude Group plc
Market Cap (USD): $24.6 M
Stock: ALT wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Software—Application

319. Tekcapital plc

Company Profile: Tekcapital plc
Market Cap (USD): $24.4 M
Stock: TEK wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Software—Application

320. Mind Gym plc

Company Profile: Mind Gym plc
Market Cap (USD): $24.1 M
Stock: MIND wb_incandescent
Country: United Kingdom
Sector: UK Industrials
Industry: UK Specialty Business Services

321. Trinity Exploration & Production plc

Company Profile: Trinity Exploration & Production plc
Market Cap (USD): $24.1 M (July 1, 2024)
Stock: TRIN wb_incandescent
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

322. essensys plc

Company Profile: essensys plc
Market Cap (USD): $24.0 M
Stock: ESYS wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Software—Application

323. Itaconix plc

Company Profile: Itaconix plc
Market Cap (USD): $23.9 M
Stock: ITX wb_incandescent
Country: United States
Sector: US Basic Materials
Industry: US Specialty Chemicals

324. SysGroup plc

Company Profile: SysGroup plc
Market Cap (USD): $23.4 M
Stock: SYS wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Software—Infrastructure

325. Zinc Media Group plc

Company Profile: Zinc Media Group plc
Market Cap (USD): $23.3 M
Stock: ZIN wb_incandescent
Country: United Kingdom
Sector: UK Communication Services
Industry: UK Entertainment

326. Polarean Imaging plc

Company Profile: Polarean Imaging plc
Market Cap (USD): $23.2 M
Stock: POLX wb_incandescent
Country: United States
Sector: US Healthcare
Industry: US Medical Devices

327. Arecor Therapeutics plc

Company Profile: Arecor Therapeutics plc
Market Cap (USD): $23.1 M
Stock: AREC wb_incandescent
Country: United Kingdom
Sector: UK Healthcare
Industry: UK Biotechnology

328. FireAngel Safety Technology Group plc

Company Profile: FireAngel Safety Technology Group plc
Market Cap (USD): $23.1 M (Jan. 1, 2024)
Stock: FA. wb_incandescent
Country: United Kingdom
Sector: UK Industrials
Industry: UK Security & Protection Services

329. Checkit plc

Company Profile: Checkit plc
Market Cap (USD): $23.0 M
Stock: CKT wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Software—Application

330. Blackbird plc

Company Profile: Blackbird plc
Market Cap (USD): $22.6 M
Stock: BIRD wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Software—Application

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