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Top FTSE AIM All-Share Companies by Market Cap and Stocks in 2026

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 Jan. 1, 2026

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Ranking Company Stock Market Cap (USD) Country Sector Industry
421 URU Metals Limited URU $9.5 M Canada Canadian Basic Materials Canadian Other Industrial Metals & Mining
422 OptiBiotix Health plc OPTI $9.4 M United Kingdom UK Healthcare UK Biotechnology
423 Ironveld plc IRON $9.4 M United Kingdom UK Basic Materials UK Other Industrial Metals & Mining
424 Xtract Resources plc XTR $9.2 M United Kingdom UK Basic Materials UK Gold
425 CPPGroup plc CPP $9.0 M United Kingdom UK Industrials UK Specialty Business Services
426 MYCELX Technologies Corporation MYX $8.9 M United States US Industrials US Pollution & Treatment Controls
427 Mobile Tornado Group plc MBT $8.8 M

(July 1, 2025)

 United Kingdom UK Communication Services UK Telecom Services
428 musicMagpie plc MMAG $8.7 M

(July 1, 2024)

 United Kingdom UK Consumer Discretionary UK Specialty Retail
429 Westmount Energy Limited WTE $8.7 M United Kingdom UK Energy UK Oil & Gas E&P
430 Bluejay Mining plc JAY $8.5 M United Kingdom UK Basic Materials UK Other Industrial Metals & Mining
431 Armadale Capital plc ACP $8.4 M

(Jan. 1, 2024)

 United Kingdom UK Basic Materials UK Other Industrial Metals & Mining
432 Malvern International plc MLVN $8.4 M United Kingdom UK Consumer Staples UK Education & Training Services
433 Petards Group plc PEG $8.2 M United Kingdom UK Industrials UK Security & Protection Services
434 Aeorema Communications plc AEO $8.2 M United Kingdom UK Communication Services UK Entertainment
435 Proton Motor Power Systems plc PPS $8.1 M

(Jan. 1, 2025)

 United Kingdom UK Industrials UK Electrical Equipment & Parts
436 Oracle Power plc ORCP $7.9 M United Kingdom UK Energy UK Thermal Coal
437 ADVFN plc AFN $7.6 M

(Jan. 1, 2025)

 United Kingdom UK Financials UK Capital Markets
438 Digitalbox plc DBOX $7.4 M United Kingdom UK Communication Services UK Internet Content & Information
439 Autins Group plc AUTG $7.3 M United Kingdom UK Consumer Discretionary UK Auto Parts
440 Dekel Agri-Vision plc DKL $7.3 M Cyprus Cyprus Consumer Staples Cyprus Farm Products
441 Reabold Resources plc RBD $7.2 M United Kingdom UK Energy UK Oil & Gas E&P
442 Thor Mining plc THR $6.9 M United Kingdom UK Basic Materials UK Other Industrial Metals & Mining
443 Crimson Tide plc TIDE $6.9 M United Kingdom UK Technology UK Software—Application
444 Baron Oil plc BOIL $6.8 M United Kingdom UK Energy UK Oil & Gas E&P
445 Jarvis Securities plc JIM $6.8 M United Kingdom UK Financials UK Capital Markets
446 Dianomi plc DNM $6.7 M United Kingdom UK Communication Services UK Advertising Agencies
447 Zytronic plc ZYT $6.7 M

(Jan. 1, 2025)

 United Kingdom UK Technology UK Electronic Components
448 United Oil & Gas plc UOG $6.6 M United Kingdom UK Energy UK Oil & Gas E&P
449 Primorus Investments plc PRIM $6.5 M United Kingdom UK Financials UK Asset Management
450 LPA Group plc LPA $6.5 M United Kingdom UK Industrials UK Electrical Equipment & Parts

Top FTSE AIM All-Share Companies Ranking by Market Cap as of Jan. 1, 2026

421. URU Metals Limited

Company Profile: URU Metals Limited
Market Cap (USD): $9.5 M
Stock: URU wb_incandescent
Country: Canada
Sector: Canadian Basic Materials
Industry: Canadian Other Industrial Metals & Mining

422. OptiBiotix Health plc

Company Profile: OptiBiotix Health plc
Market Cap (USD): $9.4 M
Stock: OPTI wb_incandescent
Country: United Kingdom
Sector: UK Healthcare
Industry: UK Biotechnology

423. Ironveld plc

Company Profile: Ironveld plc
Market Cap (USD): $9.4 M
Stock: IRON wb_incandescent
Country: United Kingdom
Sector: UK Basic Materials
Industry: UK Other Industrial Metals & Mining

424. Xtract Resources plc

Company Profile: Xtract Resources plc
Market Cap (USD): $9.2 M
Stock: XTR wb_incandescent
Country: United Kingdom
Sector: UK Basic Materials
Industry: UK Gold

425. CPPGroup plc

Company Profile: CPPGroup plc
Market Cap (USD): $9.0 M
Stock: CPP wb_incandescent
Country: United Kingdom
Sector: UK Industrials
Industry: UK Specialty Business Services

426. MYCELX Technologies Corporation

Company Profile: MYCELX Technologies Corporation
Market Cap (USD): $8.9 M
Stock: MYX wb_incandescent
Country: United States
Sector: US Industrials
Industry: US Pollution & Treatment Controls

427. Mobile Tornado Group plc

Company Profile: Mobile Tornado Group plc
Market Cap (USD): $8.8 M (July 1, 2025)
Stock: MBT wb_incandescent
Country: United Kingdom
Sector: UK Communication Services
Industry: UK Telecom Services

428. musicMagpie plc

Company Profile: musicMagpie plc
Market Cap (USD): $8.7 M (July 1, 2024)
Stock: MMAG wb_incandescent
Country: United Kingdom
Sector: UK Consumer Discretionary
Industry: UK Specialty Retail

429. Westmount Energy Limited

Company Profile: Westmount Energy Limited
Market Cap (USD): $8.7 M
Stock: WTE wb_incandescent
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

430. Bluejay Mining plc

Company Profile: Bluejay Mining plc
Market Cap (USD): $8.5 M
Stock: JAY wb_incandescent
Country: United Kingdom
Sector: UK Basic Materials
Industry: UK Other Industrial Metals & Mining

431. Armadale Capital plc

Company Profile: Armadale Capital plc
Market Cap (USD): $8.4 M (Jan. 1, 2024)
Stock: ACP wb_incandescent
Country: United Kingdom
Sector: UK Basic Materials
Industry: UK Other Industrial Metals & Mining

432. Malvern International plc

Company Profile: Malvern International plc
Market Cap (USD): $8.4 M
Stock: MLVN wb_incandescent
Country: United Kingdom
Sector: UK Consumer Staples
Industry: UK Education & Training Services

433. Petards Group plc

Company Profile: Petards Group plc
Market Cap (USD): $8.2 M
Stock: PEG wb_incandescent
Country: United Kingdom
Sector: UK Industrials
Industry: UK Security & Protection Services

434. Aeorema Communications plc

Company Profile: Aeorema Communications plc
Market Cap (USD): $8.2 M
Stock: AEO wb_incandescent
Country: United Kingdom
Sector: UK Communication Services
Industry: UK Entertainment

435. Proton Motor Power Systems plc

Company Profile: Proton Motor Power Systems plc
Market Cap (USD): $8.1 M (Jan. 1, 2025)
Stock: PPS wb_incandescent
Country: United Kingdom
Sector: UK Industrials
Industry: UK Electrical Equipment & Parts

436. Oracle Power plc

Company Profile: Oracle Power plc
Market Cap (USD): $7.9 M
Stock: ORCP wb_incandescent
Country: United Kingdom
Sector: UK Energy
Industry: UK Thermal Coal

437. ADVFN plc

Company Profile: ADVFN plc
Market Cap (USD): $7.6 M (Jan. 1, 2025)
Stock: AFN wb_incandescent
Country: United Kingdom
Sector: UK Financials
Industry: UK Capital Markets

438. Digitalbox plc

Company Profile: Digitalbox plc
Market Cap (USD): $7.4 M
Stock: DBOX wb_incandescent
Country: United Kingdom
Sector: UK Communication Services
Industry: UK Internet Content & Information

439. Autins Group plc

Company Profile: Autins Group plc
Market Cap (USD): $7.3 M
Stock: AUTG wb_incandescent
Country: United Kingdom
Sector: UK Consumer Discretionary
Industry: UK Auto Parts

440. Dekel Agri-Vision plc

Company Profile: Dekel Agri-Vision plc
Market Cap (USD): $7.3 M
Stock: DKL wb_incandescent
Country: Cyprus
Sector: Cyprus Consumer Staples
Industry: Cyprus Farm Products

441. Reabold Resources plc

Company Profile: Reabold Resources plc
Market Cap (USD): $7.2 M
Stock: RBD wb_incandescent
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

442. Thor Mining plc

Company Profile: Thor Mining plc
Market Cap (USD): $6.9 M
Stock: THR wb_incandescent
Country: United Kingdom
Sector: UK Basic Materials
Industry: UK Other Industrial Metals & Mining

443. Crimson Tide plc

Company Profile: Crimson Tide plc
Market Cap (USD): $6.9 M
Stock: TIDE wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Software—Application

444. Baron Oil plc

Company Profile: Baron Oil plc
Market Cap (USD): $6.8 M
Stock: BOIL wb_incandescent
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

445. Jarvis Securities plc

Company Profile: Jarvis Securities plc
Market Cap (USD): $6.8 M
Stock: JIM wb_incandescent
Country: United Kingdom
Sector: UK Financials
Industry: UK Capital Markets

446. Dianomi plc

Company Profile: Dianomi plc
Market Cap (USD): $6.7 M
Stock: DNM wb_incandescent
Country: United Kingdom
Sector: UK Communication Services
Industry: UK Advertising Agencies

447. Zytronic plc

Company Profile: Zytronic plc
Market Cap (USD): $6.7 M (Jan. 1, 2025)
Stock: ZYT wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Electronic Components

448. United Oil & Gas plc

Company Profile: United Oil & Gas plc
Market Cap (USD): $6.6 M
Stock: UOG wb_incandescent
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

449. Primorus Investments plc

Company Profile: Primorus Investments plc
Market Cap (USD): $6.5 M
Stock: PRIM wb_incandescent
Country: United Kingdom
Sector: UK Financials
Industry: UK Asset Management

450. LPA Group plc

Company Profile: LPA Group plc
Market Cap (USD): $6.5 M
Stock: LPA wb_incandescent
Country: United Kingdom
Sector: UK Industrials
Industry: UK Electrical Equipment & Parts

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