1. Bet365: This gambling company is known for its extensive sponsorship of various sports events, including football leagues such as the English Premier League and the Spanish La Liga.
2. 888 Holdings: 888 Holdings sponsors the World Snooker Championship and has a strong presence in the world of cricket through their partnership with Surrey County Cricket Club.
3. William Hill: William Hill has sponsored several sports events, including the World Darts Championship, Scottish Cup Football, and the PDC World Matchplay.
4. Ladbrokes Coral Group: This company has supported numerous horse racing events in the UK, including the Ladbrokes Trophy and the Ladbrokes St Leger Stakes.
5. Paddy Power: Paddy Power has been involved in sponsoring various sports events, such as the Ryder Cup, and has also supported cultural events like the Dublin International Film Festival.
6. Betfair: Betfair has sponsored several horse racing events, including the Betfair Chase and the Betfair Hurdle.
7. Unibet: Unibet is known for its involvement in supporting different sports events, such as snooker tournaments and cycling teams.
8. Betfred: Betfred sponsors various sporting events, such as rugby league competitions, horse racing festivals, and the World Matchplay Darts.
9. GVC Holdings: GVC Holdings sponsors multiple sports events, including the World Grand Prix Darts and the Yorkshire Cup horse race.
10. 32Red: This gambling company has collaborated with football clubs, including sponsoring the shirts of Derby County Football Club and becoming the main sponsor of Rangers Football Club.