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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
481 Alba Mineral Resources plc ALBA $4.1 M United Kingdom UK Basic Materials UK Other Industrial Metals & Mining
482 Tertiary Minerals plc TYM $4.0 M United Kingdom UK Basic Materials UK Other Industrial Metals & Mining
483 Deltic Energy plc DELT $3.9 M United Kingdom UK Energy UK Oil & Gas E&P
484 Revolution Bars Group plc RBG $3.9 M

(July 1, 2024)

 United Kingdom UK Consumer Discretionary UK Restaurants
485 Arkle Resources plc ARK $3.9 M Ireland Irish Basic Materials Irish Other Industrial Metals & Mining
486 Active Energy Group plc AEG $3.9 M United Kingdom UK Industrials UK Pollution & Treatment Controls
487 Image Scan Holdings plc IGE $3.9 M United Kingdom UK Industrials UK Security & Protection Services
488 Scirocco Energy plc SCIR $3.7 M

(Jan. 1, 2024)

 United Kingdom UK Energy UK Oil & Gas E&P
489 ValiRx plc VAL $3.6 M United Kingdom UK Healthcare UK Biotechnology
490 Distil plc DIS $3.6 M United Kingdom UK Consumer Staples UK Beverages—Wineries & Distilleries
491 Rosslyn Data Technologies plc RDT $3.3 M United Kingdom UK Technology UK Software—Application
492 Empyrean Energy plc EME $3.3 M Australia Australian Energy Australian Oil & Gas E&P
493 Great Western Mining Corporation plc GWMO $3.3 M Ireland Irish Basic Materials Irish Other Industrial Metals & Mining
494 Gunsynd plc GUN $3.1 M United Kingdom UK Energy UK Oil & Gas E&P
495 Red Rock Resources plc RRR $3.0 M United Kingdom UK Basic Materials UK Other Industrial Metals & Mining
496 Marechale Capital plc MAC $2.8 M United Kingdom UK Financials UK Capital Markets
497 Keras Resources plc KRS $2.7 M United Kingdom UK Basic Materials UK Other Industrial Metals & Mining
498 Riverfort Global Opportunities plc RGO $2.7 M United Kingdom UK Financials UK Asset Management
499 Sunrise Resources plc SRES $2.6 M United Kingdom UK Basic Materials UK Other Industrial Metals & Mining
500 Aferian Plc AFRN $2.6 M United Kingdom UK Communication Services UK Broadcasting
501 Clontarf Energy plc CLON $2.5 M Ireland Irish Energy Irish Oil & Gas E&P
502 MediaZest plc MDZ $2.3 M United Kingdom UK Communication Services UK Advertising Agencies
503 Sabien Technology Group plc SNT $2.3 M United Kingdom UK Industrials UK Specialty Industrial Machinery
504 Biome Technologies plc BIOM $2.2 M

(Jan. 1, 2025)

 United Kingdom UK Technology UK Electronic Components
505 Petrel Resources plc PET $2.1 M Ireland Irish Energy Irish Oil & Gas E&P
506 Argo Group Limited ARGO $2.0 M

(Jan. 1, 2025)

 Cyprus Cyprus Financials Cyprus Asset Management
507 Braveheart Investment Group plc BRH $2.0 M United Kingdom UK Financials UK Asset Management
508 Gfinity plc GFIN $1.9 M United Kingdom UK Consumer Discretionary UK Leisure
509 Deltex Medical Group plc DEMG $1.9 M

(Jan. 1, 2025)

 United Kingdom UK Healthcare UK Medical Devices
510 Jaywing plc JWNG $1.9 M

(Jan. 1, 2025)

 United Kingdom UK Communication Services UK Advertising Agencies

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

481. Alba Mineral Resources plc

Company Profile: Alba Mineral Resources plc
Market Cap (USD): $4.1 M
Stock: ALBA wb_incandescent
Country: United Kingdom
Sector: UK Basic Materials
Industry: UK Other Industrial Metals & Mining

482. Tertiary Minerals plc

Company Profile: Tertiary Minerals plc
Market Cap (USD): $4.0 M
Stock: TYM wb_incandescent
Country: United Kingdom
Sector: UK Basic Materials
Industry: UK Other Industrial Metals & Mining

483. Deltic Energy plc

Company Profile: Deltic Energy plc
Market Cap (USD): $3.9 M
Stock: DELT wb_incandescent
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

484. Revolution Bars Group plc

Company Profile: Revolution Bars Group plc
Market Cap (USD): $3.9 M (July 1, 2024)
Stock: RBG wb_incandescent
Country: United Kingdom
Sector: UK Consumer Discretionary
Industry: UK Restaurants

485. Arkle Resources plc

Company Profile: Arkle Resources plc
Market Cap (USD): $3.9 M
Stock: ARK wb_incandescent
Country: Ireland
Sector: Irish Basic Materials
Industry: Irish Other Industrial Metals & Mining

486. Active Energy Group plc

Company Profile: Active Energy Group plc
Market Cap (USD): $3.9 M
Stock: AEG wb_incandescent
Country: United Kingdom
Sector: UK Industrials
Industry: UK Pollution & Treatment Controls

487. Image Scan Holdings plc

Company Profile: Image Scan Holdings plc
Market Cap (USD): $3.9 M
Stock: IGE wb_incandescent
Country: United Kingdom
Sector: UK Industrials
Industry: UK Security & Protection Services

488. Scirocco Energy plc

Company Profile: Scirocco Energy plc
Market Cap (USD): $3.7 M (Jan. 1, 2024)
Stock: SCIR wb_incandescent
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

489. ValiRx plc

Company Profile: ValiRx plc
Market Cap (USD): $3.6 M
Stock: VAL wb_incandescent
Country: United Kingdom
Sector: UK Healthcare
Industry: UK Biotechnology

490. Distil plc

Company Profile: Distil plc
Market Cap (USD): $3.6 M
Stock: DIS wb_incandescent
Country: United Kingdom
Sector: UK Consumer Staples
Industry: UK Beverages—Wineries & Distilleries

491. Rosslyn Data Technologies plc

Company Profile: Rosslyn Data Technologies plc
Market Cap (USD): $3.3 M
Stock: RDT wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Software—Application

492. Empyrean Energy plc

Company Profile: Empyrean Energy plc
Market Cap (USD): $3.3 M
Stock: EME wb_incandescent
Country: Australia
Sector: Australian Energy
Industry: Australian Oil & Gas E&P

493. Great Western Mining Corporation plc

Company Profile: Great Western Mining Corporation plc
Market Cap (USD): $3.3 M
Stock: GWMO wb_incandescent
Country: Ireland
Sector: Irish Basic Materials
Industry: Irish Other Industrial Metals & Mining

494. Gunsynd plc

Company Profile: Gunsynd plc
Market Cap (USD): $3.1 M
Stock: GUN wb_incandescent
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

495. Red Rock Resources plc

Company Profile: Red Rock Resources plc
Market Cap (USD): $3.0 M
Stock: RRR wb_incandescent
Country: United Kingdom
Sector: UK Basic Materials
Industry: UK Other Industrial Metals & Mining

496. Marechale Capital plc

Company Profile: Marechale Capital plc
Market Cap (USD): $2.8 M
Stock: MAC wb_incandescent
Country: United Kingdom
Sector: UK Financials
Industry: UK Capital Markets

497. Keras Resources plc

Company Profile: Keras Resources plc
Market Cap (USD): $2.7 M
Stock: KRS wb_incandescent
Country: United Kingdom
Sector: UK Basic Materials
Industry: UK Other Industrial Metals & Mining

498. Riverfort Global Opportunities plc

Company Profile: Riverfort Global Opportunities plc
Market Cap (USD): $2.7 M
Stock: RGO wb_incandescent
Country: United Kingdom
Sector: UK Financials
Industry: UK Asset Management

499. Sunrise Resources plc

Company Profile: Sunrise Resources plc
Market Cap (USD): $2.6 M
Stock: SRES wb_incandescent
Country: United Kingdom
Sector: UK Basic Materials
Industry: UK Other Industrial Metals & Mining

500. Aferian Plc

Company Profile: Aferian Plc
Market Cap (USD): $2.6 M
Stock: AFRN wb_incandescent
Country: United Kingdom
Sector: UK Communication Services
Industry: UK Broadcasting

501. Clontarf Energy plc

Company Profile: Clontarf Energy plc
Market Cap (USD): $2.5 M
Stock: CLON wb_incandescent
Country: Ireland
Sector: Irish Energy
Industry: Irish Oil & Gas E&P

502. MediaZest plc

Company Profile: MediaZest plc
Market Cap (USD): $2.3 M
Stock: MDZ wb_incandescent
Country: United Kingdom
Sector: UK Communication Services
Industry: UK Advertising Agencies

503. Sabien Technology Group plc

Company Profile: Sabien Technology Group plc
Market Cap (USD): $2.3 M
Stock: SNT wb_incandescent
Country: United Kingdom
Sector: UK Industrials
Industry: UK Specialty Industrial Machinery

504. Biome Technologies plc

Company Profile: Biome Technologies plc
Market Cap (USD): $2.2 M (Jan. 1, 2025)
Stock: BIOM wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Electronic Components

505. Petrel Resources plc

Company Profile: Petrel Resources plc
Market Cap (USD): $2.1 M
Stock: PET wb_incandescent
Country: Ireland
Sector: Irish Energy
Industry: Irish Oil & Gas E&P

506. Argo Group Limited

Company Profile: Argo Group Limited
Market Cap (USD): $2.0 M (Jan. 1, 2025)
Stock: ARGO wb_incandescent
Country: Cyprus
Sector: Cyprus Financials
Industry: Cyprus Asset Management

507. Braveheart Investment Group plc

Company Profile: Braveheart Investment Group plc
Market Cap (USD): $2.0 M
Stock: BRH wb_incandescent
Country: United Kingdom
Sector: UK Financials
Industry: UK Asset Management

508. Gfinity plc

Company Profile: Gfinity plc
Market Cap (USD): $1.9 M
Stock: GFIN wb_incandescent
Country: United Kingdom
Sector: UK Consumer Discretionary
Industry: UK Leisure

509. Deltex Medical Group plc

Company Profile: Deltex Medical Group plc
Market Cap (USD): $1.9 M (Jan. 1, 2025)
Stock: DEMG wb_incandescent
Country: United Kingdom
Sector: UK Healthcare
Industry: UK Medical Devices

510. Jaywing plc

Company Profile: Jaywing plc
Market Cap (USD): $1.9 M (Jan. 1, 2025)
Stock: JWNG wb_incandescent
Country: United Kingdom
Sector: UK Communication Services
Industry: UK Advertising Agencies

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