| | Broadcast Media | London | England | > $1B |
| | Broadcast Media | London | ENG | > $1B |
| | Newspapers | London | ENG | $500M - 1B |
| | Newspapers | London | ENG | $250 - 500M |
| | Music | London | England | $500M - 1B |
| | Newspapers | London | England | $500M - 1B |
| ASOS.comASOS | Shop the Latest Clothes and Fashion Online | Internet | London | England | > $1B |
| | Sports | London | England | $500M - 1B |
| | Newspapers | London | ENG | |
| BadooMeet People on Badoo, Make New Friends, Chat, Flirt | Internet | London | | $100 - 250M |
| Daily MirrorMirror Online: The intelligent tabloid. #madeuthink | Newspapers | London | ENG | $50 - 100M |
| | Law Practice | London | | $0 - 1M |
| | Information Technology and Services | London | | $1 - 10M |
| | Government Administration | London | ENG | > $1B |
| | Sports | London | England | $10 - 50M |
| | Entertainment | London | ENG | |
| Rightmove PLCUK's number one property website for properties for sale and to rent | Real Estate | London | England | $500M - 1B |
| Match.com, L.L.C.
Match.com® | The Leading Online Dating Site for Singles & Personals : Match.com
| Internet | London | England | $500M - 1B |
| | Newspapers | London | | $10 - 50M |
| PiriformPiriform - Download CCleaner - Millions of users worldwide! | Information Technology and Services | London | | $1 - 10M |
| TeamViewer>TeamViewer – Remote Support, Remote Access, Service Desk, Online Collaboration and Meetings | Computer Software | London | England | $50 - 100M |
| | Publishing | London | Greater London | $250 - 500M |
| | Newspapers | London | | $10 - 50M |
| BT Group plcBT | Using the power of communication to make a better world | Information Technology and Services | London | England | > $1B |
| HSBCHSBC Personal Banking and Online Banking | HSBC UK | Insurance | London | England | > $1B |
| | Internet | London | England | $100 - 250M |
| | Computer Software | London | England | $100 - 250M |
| | Newspapers | London | England | $500M - 1B |
| | Banking | London | | $500M - 1B |
| | Internet | London | | $1 - 10M |
| Santander UKBank Accounts, Savings, Loans and Mortgages Santander - Santander UK | Financial Services | London | | > $1B |
| | Information Technology and Services | London | England | $1 - 10M |
| XeroAccounting Software & Online Bookkeeping | Xero | Computer Software | London | England | > $1B |
| Metro.co.ukMetro.co.uk: News, Sport, Showbiz, Celebrities from Metro | Online Media | London | | $0 - 1M |
| ZooplaZoopla > Search Property to Buy, Rent, House Prices, Estate Agents | Internet | London | | $1 - 10M |
| | Banking | London | | > $1B |
| | Computer Games | London | | $0 - 1M |
| FarfetchFarfetch - Designer Luxury Fashion for Men & Women | Internet | London | England | $100 - 250M |
| SkrillOnline payments & Money transfers | Skrill | Financial Services | London | England | $250 - 500M |
| BetfairBetfair Online Betting | Bet £/€10 Get £/€30 Bet Online & Use Cash Out Now! |
| Internet | London | England | > $1B |
| John LewisJohn Lewis | iPads, TVs, Furniture, Fashion & More | Consumer Goods | London | | $500M - 1B |
| NatWestNatWest Online – Bank Accounts, Mortgages, Loans and Savings | Banking | London | | > $1B |
| | Internet | London | ENG | $1 - 10M |
| British CouncilBritish Council | The UK’s international culture and education organisation | Nonprofit Organization Management | London | England | > $1B |
| | Marketing and Advertising | London | | $1 - 10M |
| | Online Media | London | England | $0 - 1M |
| Macworld UKApple, Mac, iPhone, iPad reviews, how tos, videos, news and forums. - Macworld UK | Newspapers | London | | $1 - 10M |
| | Broadcast Media | London | London | $500M - 1B |
| | Transportation/Trucking/Railroad | London | England | $500M - 1B |
| ITVThe ITV Hub - The home of ITV | Newspapers | London | | $100 - 250M |
| | Retail | London | England | > $1B |
| | Media Production | London | | $1 - 10M |
| | Banking | London | England | $1 - 10M |
| Trainline
Cheap Train Tickets, UK Rail Times & Fares - Trainline
| Internet | London | | $100 - 250M |
| | Newspapers | London | | $500M - 1B |
| | Information Technology and Services | London | | |
| | Education Management | London | England | |
| | Education Management | London | England | > $1B |
| | Entertainment | London | England | > $1B |
| MemriseLearning, made joyful - Memrise | E-Learning | London | England | $1 - 10M |
| reed.co.ukJobs and Recruitment on reed.co.uk, the UK's #1 job site | Staffing and Recruiting | London | London | $50 - 100M |
| | Internet | London | UK | $1 - 10M |
| | Publishing | London | England | $250 - 500M |
| TotaljobsJobs | UK Job Search | Find your perfect job - totaljobs | Online Media | London | | $100 - 250M |
| | Internet | London | England | $1 - 10M |
| GrouponGroupon: Deals and Coupons for Restaurants, Fitness, Travel, Shopping, Beauty & more | Internet | London | | $1 - 10M |
| Webgains UKWebgains | Performance marketing specialists | Online Media | London | ENG | $10 - 50M |
| VivastreetPetites Annonces Gratuites . Annonce : Emploi , Rencontre, Immobilier Vivastreet | Retail | London | England | $1 - 10M |
| | Retail | London | ENG | |
| | Retail | London | England | > $1B |
| | Internet | London | | $1 - 10M |
| | Publishing | London | England | $250 - 500M |
| | Education Management | London | England | $1 - 10M |
| TOPSHOP TOPMANTopshop USA - Women's Clothing | Women's Fashion & Trends | Apparel & Fashion | London | England | > $1B |
| IGIG – world leader in Online Trading. Access 10,000+ markets including Shares, Indices and FX. | Financial Services | London | England | > $1B |
| | Internet | London | | $1 - 10M |
| | Retail | London | England | > $1B |
| HSBCHSBC Group corporate website | HSBC Holdings plc | Investment Management | London | England | > $1B |
| | Newspapers | London | | $500M - 1B |
| ADVFN Com PLCFree stock prices, quotes, stock charts, market news and streaming real-time stock quotes. | Investment Management | London | England | $10 - 50M |
| | Entertainment | London | England | $100 - 250M |
| | Online Media | London | England | $1 - 10M |
| AOL EuropeAOL.co.uk | Breaking News, Sport, Features and Video | Publishing | London | | $10 - 50M |
| Unibet GroupUnibet Sportsbook, Casino, Poker & Bingo Games Online! | Gambling & Casinos | London | N/A | $100 - 250M |
| TransferWise
Transfer Money Online | Send Money Abroad with TransferWise
| Financial Services | London | England | $250 - 500M |
| | Human Resources | London | ENG | > $1B |
| LystLyst - Your World of Fashion | Apparel & Fashion | London | England | $10 - 50M |
| | Research | London | | > $1B |
| FilmOnFILMON TV FREE LIVE TV MOVIES AND SOCIAL TELEVISION | Internet | London | | $10 - 50M |
| Debenhams
Debenhams UK - Fashion, Beauty, Gifts, Furniture & Electricals
| Retail | London | England | > $1B |
| | Publishing | London | | |
| NMENME Music News, Reviews, Videos, Galleries, Tickets and Blogs | NME.COM | Music | London | ENG | $1 - 10M |
| Which?Reviews and expert advice from Which? | Publishing | London | England | $250 - 500M |
| | Publishing | London WC1H 9JR | | $250 - 500M |
| | Information Technology and Services | London | | $1 - 10M |
| MimecastEmail Cloud Services in Security & Archiving | Mimecast | Information Technology and Services | London | England | $250 - 500M |
| Sage PaySimple, Flexible & Secure Payment Services with Sage Pay | Financial Services | London | | $50 - 100M |
| MR PORTERMR PORTER - The online retail destination for men's style | Retail | London | England | > $1B |
| New ScientistNew Scientist | Science news and science articles from New Scientist | Publishing | London | | $10 - 50M |
| PayzaPayza | Send Money, Receive Payment, Money Transfer, Shop & Sell Online | Financial Services | London | | $10 - 50M |