^AIM1

FTSE AIM 100
Components

Top FTSE AIM 100 Companies by Market Cap and Stocks in 2025

This is the list of the largest public listed companies in the FTSE AIM 100 index ranked by market capitalization, together with links to their reference stock, sector and industry.

FTSE AIM 100 Chart & Analysis

Top FTSE AIM 100 Companies Ranking by Market Cap as of July 1, 2025

Ranking Company Stock Market Cap (USD) Country Sector Industry
31 Johnson Service Group plc JSG wb_incandescent $882.9 M United Kingdom UK Industrials UK Specialty Business Services
32 Serica Energy plc SQZ wb_incandescent $863.3 M United Kingdom UK Energy UK Oil & Gas E&P
33 Boku, Inc. BOKU wb_incandescent $851.8 M United States US Technology US Information Technology Services
34 M.P. Evans Group plc MPE wb_incandescent $832.1 M United Kingdom UK Consumer Staples UK Farm Products
35 ITM Power plc ITM wb_incandescent $796.9 M United Kingdom UK Technology UK Electronic Components
36 Judges Scientific plc JDG wb_incandescent $791.5 M United Kingdom UK Technology UK Scientific & Technical Instruments
37 Draper Esprit plc GROW wb_incandescent $785.7 M United Kingdom UK Financials UK Asset Management
38 GB Group plc GBG wb_incandescent $777.5 M United Kingdom UK Technology UK Software—Application
39 FD Technologies plc FDP wb_incandescent $744.1 M United Kingdom UK Technology UK Information Technology Services
40 Nichols plc NICL wb_incandescent $736.4 M United Kingdom UK Consumer Staples UK Beverages—Non-Alcoholic
41 Alpha Financial Markets Consulting plc AFM wb_incandescent $718.3 M

(July 1, 2024)

 United Kingdom UK Industrials UK Consulting Services
42 Mortgage Advice Bureau (Holdings) plc MAB1 wb_incandescent $704.0 M United Kingdom UK Financials UK Mortgage Finance
43 Young & Co.'s Brewery, plc YNGA wb_incandescent $694.0 M United Kingdom UK Consumer Discretionary UK Restaurants
44 Young & Co.'s Brewery, plc YNGN wb_incandescent $694.0 M United Kingdom UK Consumer Discretionary UK Restaurants
45 Hotel Chocolat Group plc HOTC wb_incandescent $651.7 M

(Jan. 1, 2024)

 United Kingdom UK Consumer Staples UK Confectioners
46 Warehouse REIT plc WHR wb_incandescent $649.5 M United Kingdom UK Real Estate UK REIT—Industrial
47 Atalaya Mining plc ATYM wb_incandescent $630.8 M

(March 1, 2023)

 Cyprus Cyprus Basic Materials Cyprus Copper
48 Polar Capital Holdings plc POLR wb_incandescent $627.1 M United Kingdom UK Financials UK Asset Management
49 YouGov plc YOU wb_incandescent $614.7 M United Kingdom UK Communication Services UK Advertising Agencies
50 Advanced Medical Solutions Group plc AMS wb_incandescent $613.3 M United Kingdom UK Healthcare UK Medical Instruments & Supplies
51 Urban Logistics REIT plc SHED wb_incandescent $598.8 M

(Jan. 1, 2025)

 United Kingdom UK Real Estate UK REIT—Industrial
52 Silence Therapeutics plc SLN wb_incandescent $588.4 M

(Nov. 1, 2021)

 United Kingdom UK Healthcare UK Biotechnology
53 AB Dynamics plc ABDP wb_incandescent $530.0 M United Kingdom UK Consumer Discretionary UK Auto Parts
54 FW Thorpe plc TFW wb_incandescent $529.0 M United Kingdom UK Industrials UK Electrical Equipment & Parts
55 Mattioli Woods plc MTW wb_incandescent $523.3 M

(July 1, 2024)

 United Kingdom UK Financials UK Asset Management
56 Team17 Group plc TM17 wb_incandescent $522.6 M United Kingdom UK Communication Services UK Electronic Gaming & Multimedia
57 boohoo group plc BOO wb_incandescent $505.9 M United Kingdom UK Consumer Discretionary UK Internet Retail
58 ASOS plc ASC wb_incandescent $500.4 M United Kingdom UK Consumer Discretionary UK Internet Retail
59 Restore plc RST wb_incandescent $491.4 M United Kingdom UK Industrials UK Specialty Business Services
60 Marlowe plc MRL wb_incandescent $473.9 M United Kingdom UK Industrials UK Security & Protection Services

Top FTSE AIM 100 Companies Ranking by Market Cap as of July 1, 2025

31. Johnson Service Group plc

Company Profile: Johnson Service Group plc
Market Cap (USD): $882.9 M
Stock: JSG wb_incandescent
Country: United Kingdom
Sector: UK Industrials
Industry: UK Specialty Business Services

32. Serica Energy plc

Company Profile: Serica Energy plc
Market Cap (USD): $863.3 M
Stock: SQZ wb_incandescent
Country: United Kingdom
Sector: UK Energy
Industry: UK Oil & Gas E&P

33. Boku, Inc.

Company Profile: Boku, Inc.
Market Cap (USD): $851.8 M
Stock: BOKU wb_incandescent
Country: United States
Sector: US Technology
Industry: US Information Technology Services

34. M.P. Evans Group plc

Company Profile: M.P. Evans Group plc
Market Cap (USD): $832.1 M
Stock: MPE wb_incandescent
Country: United Kingdom
Sector: UK Consumer Staples
Industry: UK Farm Products

35. ITM Power plc

Company Profile: ITM Power plc
Market Cap (USD): $796.9 M
Stock: ITM wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Electronic Components

36. Judges Scientific plc

Company Profile: Judges Scientific plc
Market Cap (USD): $791.5 M
Stock: JDG wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Scientific & Technical Instruments

37. Draper Esprit plc

Company Profile: Draper Esprit plc
Market Cap (USD): $785.7 M
Stock: GROW wb_incandescent
Country: United Kingdom
Sector: UK Financials
Industry: UK Asset Management

38. GB Group plc

Company Profile: GB Group plc
Market Cap (USD): $777.5 M
Stock: GBG wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Software—Application

39. FD Technologies plc

Company Profile: FD Technologies plc
Market Cap (USD): $744.1 M
Stock: FDP wb_incandescent
Country: United Kingdom
Sector: UK Technology
Industry: UK Information Technology Services

40. Nichols plc

Company Profile: Nichols plc
Market Cap (USD): $736.4 M
Stock: NICL wb_incandescent
Country: United Kingdom
Sector: UK Consumer Staples
Industry: UK Beverages—Non-Alcoholic

41. Alpha Financial Markets Consulting plc

Company Profile: Alpha Financial Markets Consulting plc
Market Cap (USD): $718.3 M (July 1, 2024)
Stock: AFM wb_incandescent
Country: United Kingdom
Sector: UK Industrials
Industry: UK Consulting Services

42. Mortgage Advice Bureau (Holdings) plc

Company Profile: Mortgage Advice Bureau (Holdings) plc
Market Cap (USD): $704.0 M
Stock: MAB1 wb_incandescent
Country: United Kingdom
Sector: UK Financials
Industry: UK Mortgage Finance

43. Young & Co.'s Brewery, plc

Company Profile: Young & Co.'s Brewery, plc
Market Cap (USD): $694.0 M
Stock: YNGA wb_incandescent
Country: United Kingdom
Sector: UK Consumer Discretionary
Industry: UK Restaurants

44. Young & Co.'s Brewery, plc

Company Profile: Young & Co.'s Brewery, plc
Market Cap (USD): $694.0 M
Stock: YNGN wb_incandescent
Country: United Kingdom
Sector: UK Consumer Discretionary
Industry: UK Restaurants

45. Hotel Chocolat Group plc

Company Profile: Hotel Chocolat Group plc
Market Cap (USD): $651.7 M (Jan. 1, 2024)
Stock: HOTC wb_incandescent
Country: United Kingdom
Sector: UK Consumer Staples
Industry: UK Confectioners

46. Warehouse REIT plc

Company Profile: Warehouse REIT plc
Market Cap (USD): $649.5 M
Stock: WHR wb_incandescent
Country: United Kingdom
Sector: UK Real Estate
Industry: UK REIT—Industrial

47. Atalaya Mining plc

Company Profile: Atalaya Mining plc
Market Cap (USD): $630.8 M (March 1, 2023)
Stock: ATYM wb_incandescent
Country: Cyprus
Sector: Cyprus Basic Materials
Industry: Cyprus Copper

48. Polar Capital Holdings plc

Company Profile: Polar Capital Holdings plc
Market Cap (USD): $627.1 M
Stock: POLR wb_incandescent
Country: United Kingdom
Sector: UK Financials
Industry: UK Asset Management

49. YouGov plc

Company Profile: YouGov plc
Market Cap (USD): $614.7 M
Stock: YOU wb_incandescent
Country: United Kingdom
Sector: UK Communication Services
Industry: UK Advertising Agencies

50. Advanced Medical Solutions Group plc

Company Profile: Advanced Medical Solutions Group plc
Market Cap (USD): $613.3 M
Stock: AMS wb_incandescent
Country: United Kingdom
Sector: UK Healthcare
Industry: UK Medical Instruments & Supplies

51. Urban Logistics REIT plc

Company Profile: Urban Logistics REIT plc
Market Cap (USD): $598.8 M (Jan. 1, 2025)
Stock: SHED wb_incandescent
Country: United Kingdom
Sector: UK Real Estate
Industry: UK REIT—Industrial

52. Silence Therapeutics plc

Company Profile: Silence Therapeutics plc
Market Cap (USD): $588.4 M (Nov. 1, 2021)
Stock: SLN wb_incandescent
Country: United Kingdom
Sector: UK Healthcare
Industry: UK Biotechnology

53. AB Dynamics plc

Company Profile: AB Dynamics plc
Market Cap (USD): $530.0 M
Stock: ABDP wb_incandescent
Country: United Kingdom
Sector: UK Consumer Discretionary
Industry: UK Auto Parts

54. FW Thorpe plc

Company Profile: FW Thorpe plc
Market Cap (USD): $529.0 M
Stock: TFW wb_incandescent
Country: United Kingdom
Sector: UK Industrials
Industry: UK Electrical Equipment & Parts

55. Mattioli Woods plc

Company Profile: Mattioli Woods plc
Market Cap (USD): $523.3 M (July 1, 2024)
Stock: MTW wb_incandescent
Country: United Kingdom
Sector: UK Financials
Industry: UK Asset Management

56. Team17 Group plc

Company Profile: Team17 Group plc
Market Cap (USD): $522.6 M
Stock: TM17 wb_incandescent
Country: United Kingdom
Sector: UK Communication Services
Industry: UK Electronic Gaming & Multimedia

57. boohoo group plc

Company Profile: boohoo group plc
Market Cap (USD): $505.9 M
Stock: BOO wb_incandescent
Country: United Kingdom
Sector: UK Consumer Discretionary
Industry: UK Internet Retail

58. ASOS plc

Company Profile: ASOS plc
Market Cap (USD): $500.4 M
Stock: ASC wb_incandescent
Country: United Kingdom
Sector: UK Consumer Discretionary
Industry: UK Internet Retail

59. Restore plc

Company Profile: Restore plc
Market Cap (USD): $491.4 M
Stock: RST wb_incandescent
Country: United Kingdom
Sector: UK Industrials
Industry: UK Specialty Business Services

60. Marlowe plc

Company Profile: Marlowe plc
Market Cap (USD): $473.9 M
Stock: MRL wb_incandescent
Country: United Kingdom
Sector: UK Industrials
Industry: UK Security & Protection Services

Stay in touch