Largest & Smallest Market Cap AIM Companies

UPDATED MAY, 13

Largest & Smallest Market Cap AIM Companies

As depicted by the extreme variation in size below, AIM offers investors a huge variety of investment opportunities (updated 13th May 2020).  

 25 Largest AIM Companies By Market Cap:

  • BOOHOO GROUP PLC (BOO) – £3,77bn 
  • ABCAM PLC (ABC) £2,74bn 
  • ASOS PLC (ASC) £2,39bn 
  • HUTCHISON CHINA MEDITECH LIMITED (HCM) £2,34bn 
  • FEVERTREE DRINKS PLC (FEVR) £2,02bn 
  • RWS HOLDINGS PLC (RWS) £1,48bn 
  • GLOBALDATA PLC (GWI) £1,46bn 
  • BREEDON GROUP PLC (BREE) £1,44bn 
  • GB GROUP PLC (GBG) £1,31bn 
  • GAMMA COMMUNICATIONS PLC (GAMA) £1,27bn 
  • GLOBALWORTH REAL ESTATE INVESTMENTS LIMITED (DATA) £1,21bn 
  • BLUE PRISM GROUP PLC (PRSM) -£1,20bn 
  • BURFORD CAPITAL LIMITED (BUR) -£1,10bn 
  • KEYWORDS STUDIOS PLC (KWS) -£1,05bn 
  • JAMES HALSTEAD PLC (JHD) -£1,04bn 
  • CLINIGEN GROUP PLC (CLIN) -£959.17m 
  • DART GROUP PLC (DTG) -£959.17m 
  • SECURE INCOME REIT PLC (SIR)-£958.23m 
  • HIGHLAND GOLD MINING LD (HGM) £891.10m 
  • LEARNING TECHNOLOGIES GROUP PLC (LTG) -£867.53m 
  • TEAM17 GROUP PLC (TM17) -£861.64m 
  • ITM POWER PLC (ITM) -£746.36m 
  • CERES POWER HOLDINGS PLC (CWR) -£741.00m 
  • YOUGOV PLC (YOU) -£722.60m 
  • FIRST DERIVATIVES PLC (FDP)-£721.44m 

25 Smallest AIM Companies By Market Cap:

  • VELA TECHNOLOGIES PLC (VELA) – £0.92m 
  • MOTIF BIO PLC (MTFB) – £0.91m 
  • ONLINE BLOCKCHAIN PLC (OBC) – £0.87m 
  • ST JAMES HOUSE PLC (SJH) – £0.86m 
  • ENERGISER INVESTMENTS PLC (ENGI)– £0.84m 
  • BILLING SERVICES GROUP LIMITED (B4S) – £0.82m 
  • VINTANA PLC (VITA) – £0.81m  
  • JOHN LEWIS OF HUNGERFORD PLC (JLH) – £0.79m 
  • INSPIRIT ENERGY HOLDINGS PLC (INSP) – £0.75m 
  • ASHLEY HOUSE PLC (ASH) – £0.74m 
  • MOSMAN OIL AND GAS LIMITED (MSMN)– £0.68m 
  • SLINGSBY (H.C.) PLC (SLNG) – £0.65m 
  • HAWKWING PLC (HNG) – £0.57m  
  • MARECHALE CAPITAL PLC (MAC) – £0.52m 
  • SPITFIRE OIL LIMITED (SRO)– £0.52m  
  • GUNSYND PLC (GUN)– £0.51m  
  • TRAFALGAR PROPERTY GROUP PLC (TRAF)– £0.46m 
  • PACIFIC ALLIANCE CHINA LAND LIMITED (PACL) – £0.46m 
  • MEDIAZEST PLC (MDZ) – £0.42m  
  • WISHBONE GOLD PLC (WSBN) – £0.41m 
  • MALVERN INTERNATIONAL PLC (MLVN) – £0.39 m 
  • NAKAMA GROUP PLC (NAK)– £0.29m 
  • TIGER RESOURCE PLC (TIR)– £0.28m  
  • PLUTUS POWERGEN PLC (PPG)– £0.22  
  • WALCOM GROUP LIMITED (WALG)– £0.10m 

*The illiquidity in the trading of the shares above means you should proceed with the utmost caution when considering investing in the real lower-end of the FTSE AIM market. To add to this, several of the smallest AIM companies listed above currently have their shares suspended or are looking towards potentially delisting from the market.

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