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FTSE AIM UK 50
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Top FTSE AIM UK 50 Companies by Market Cap and Stocks in 2026

This is the list of the largest public listed companies in the FTSE AIM UK 50 index ranked by market capitalization, together with links to their reference stock, sector and industry.

FTSE AIM UK 50 Chart & Analysis

Top FTSE AIM UK 50 Companies Ranking by Market Cap as of Jan. 1, 2026

Ranking Company Stock Market Cap (USD) Country Sector Industry
31 Ceres Power Holdings plc CWR $560.2 M United Kingdom UK Industrials UK Electrical Equipment & Parts
32 Mortgage Advice Bureau (Holdings) plc MAB1 $529.4 M United Kingdom UK Financials UK Mortgage Finance
33 ITM Power plc ITM $525.4 M United Kingdom UK Technology UK Electronic Components
34 Numis Corporation plc NUM $465.4 M

(July 1, 2023)

 United Kingdom UK Financials UK Capital Markets
35 ASOS plc ASC $459.7 M United Kingdom UK Consumer Discretionary UK Internet Retail
36 Nichols plc NICL $458.6 M United Kingdom UK Consumer Staples UK Beverages—Non-Alcoholic
37 Central Asia Metals plc CAML $432.8 M United Kingdom UK Basic Materials UK Copper
38 FW Thorpe plc TFW $430.0 M United Kingdom UK Industrials UK Electrical Equipment & Parts
39 Next Fifteen Communications Group plc NFC $427.5 M United Kingdom UK Communication Services UK Advertising Agencies
40 RWS Holdings plc RWS $421.5 M United Kingdom UK Industrials UK Consulting Services
41 Alliance Pharma plc APH $413.8 M

(Jan. 1, 2025)

 United Kingdom UK Healthcare UK Drug Manufacturers—Specialty & Generic
42 dotdigital Group plc DOTD $280.7 M United Kingdom UK Technology UK Software—Application
43 Midwich Group plc MIDW $250.7 M United Kingdom UK Technology UK Electronics & Computer Distribution
44 Impax Asset Management Group plc IPX $249.5 M United Kingdom UK Financials UK Asset Management
45 Frontier Developments plc FDEV $230.7 M United Kingdom UK Communication Services UK Electronic Gaming & Multimedia
46 Gooch & Housego plc GHH $224.0 M United Kingdom UK Technology UK Electronic Components
47 Knights Group Holdings plc KGH $202.6 M United Kingdom UK Industrials UK Specialty Business Services
48 Watkin Jones plc WJG $101.4 M United Kingdom UK Consumer Discretionary UK Residential Construction
49 IQE plc IQE $67.2 M United Kingdom UK Technology UK Semiconductor Equipment & Materials
50 iomart Group plc IOM $26.7 M United Kingdom UK Technology UK Software—Infrastructure
51 Scapa Group plc SCPA United Kingdom UK Basic Materials UK Specialty Chemicals

Top FTSE AIM UK 50 Companies Ranking by Market Cap as of Jan. 1, 2026

31. Ceres Power Holdings plc

Company Profile: Ceres Power Holdings plc
Market Cap (USD): $560.2 M
Stock: CWR wb_incandescent
Country: United Kingdom
Sector: UK Industrials
Industry: UK Electrical Equipment & Parts

32. Mortgage Advice Bureau (Holdings) plc

Company Profile: Mortgage Advice Bureau (Holdings) plc
Market Cap (USD): $529.4 M
Stock: MAB1 wb_incandescent
Country: United Kingdom
Sector: UK Financials
Industry: UK Mortgage Finance

33. ITM Power plc

Company Profile: ITM Power plc
Market Cap (USD): $525.4 M
Stock: ITM wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Electronic Components

34. Numis Corporation plc

Company Profile: Numis Corporation plc
Market Cap (USD): $465.4 M (July 1, 2023)
Stock: NUM wb_incandescent
Country: United Kingdom
Sector: UK Financials
Industry: UK Capital Markets

35. ASOS plc

Company Profile: ASOS plc
Market Cap (USD): $459.7 M
Stock: ASC wb_incandescent
Country: United Kingdom
Sector: UK Consumer Discretionary
Industry: UK Internet Retail

36. Nichols plc

Company Profile: Nichols plc
Market Cap (USD): $458.6 M
Stock: NICL wb_incandescent
Country: United Kingdom
Sector: UK Consumer Staples
Industry: UK Beverages—Non-Alcoholic

37. Central Asia Metals plc

Company Profile: Central Asia Metals plc
Market Cap (USD): $432.8 M
Stock: CAML wb_incandescent
Country: United Kingdom
Sector: UK Basic Materials
Industry: UK Copper

38. FW Thorpe plc

Company Profile: FW Thorpe plc
Market Cap (USD): $430.0 M
Stock: TFW wb_incandescent
Country: United Kingdom
Sector: UK Industrials
Industry: UK Electrical Equipment & Parts

39. Next Fifteen Communications Group plc

Company Profile: Next Fifteen Communications Group plc
Market Cap (USD): $427.5 M
Stock: NFC wb_incandescent
Country: United Kingdom
Sector: UK Communication Services
Industry: UK Advertising Agencies

40. RWS Holdings plc

Company Profile: RWS Holdings plc
Market Cap (USD): $421.5 M
Stock: RWS wb_incandescent
Country: United Kingdom
Sector: UK Industrials
Industry: UK Consulting Services

41. Alliance Pharma plc

Company Profile: Alliance Pharma plc
Market Cap (USD): $413.8 M (Jan. 1, 2025)
Stock: APH wb_incandescent
Country: United Kingdom
Sector: UK Healthcare
Industry: UK Drug Manufacturers—Specialty & Generic

42. dotdigital Group plc

Company Profile: dotdigital Group plc
Market Cap (USD): $280.7 M
Stock: DOTD wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Software—Application

43. Midwich Group plc

Company Profile: Midwich Group plc
Market Cap (USD): $250.7 M
Stock: MIDW wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Electronics & Computer Distribution

44. Impax Asset Management Group plc

Company Profile: Impax Asset Management Group plc
Market Cap (USD): $249.5 M
Stock: IPX wb_incandescent
Country: United Kingdom
Sector: UK Financials
Industry: UK Asset Management

45. Frontier Developments plc

Company Profile: Frontier Developments plc
Market Cap (USD): $230.7 M
Stock: FDEV wb_incandescent
Country: United Kingdom
Sector: UK Communication Services
Industry: UK Electronic Gaming & Multimedia

46. Gooch & Housego plc

Company Profile: Gooch & Housego plc
Market Cap (USD): $224.0 M
Stock: GHH wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Electronic Components

47. Knights Group Holdings plc

Company Profile: Knights Group Holdings plc
Market Cap (USD): $202.6 M
Stock: KGH wb_incandescent
Country: United Kingdom
Sector: UK Industrials
Industry: UK Specialty Business Services

48. Watkin Jones plc

Company Profile: Watkin Jones plc
Market Cap (USD): $101.4 M
Stock: WJG wb_incandescent
Country: United Kingdom
Sector: UK Consumer Discretionary
Industry: UK Residential Construction

49. IQE plc

Company Profile: IQE plc
Market Cap (USD): $67.2 M
Stock: IQE wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Semiconductor Equipment & Materials

50. iomart Group plc

Company Profile: iomart Group plc
Market Cap (USD): $26.7 M
Stock: IOM wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Software—Infrastructure

51. Scapa Group plc

Company Profile: Scapa Group plc
Stock: SCPA wb_incandescent
Country: United Kingdom
Sector: UK Basic Materials
Industry: UK Specialty Chemicals

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