Star Wars creator George Lucas has been named as Hollywood’s richest mogul in a survey published by Wealth-X, a Singapore-based organisation which describes itself as “the world’s leading ultra-high net worth (UHNW) intelligence and prospecting firm”.

Wealth-X say Lucas has a personal net worth of $5.4bn (£3.5bn), the majority of which would appear to derive from the $4bn sale of his production company, Lucasfilm, to Disney in 2012. Lucas has also benefited from producing six (and directing four) Star Wars films, and controlling the ancillary merchandising and spin-off materials.

Just behind Lucas is the veteran Israeli producer Arnon Milchan, responsible for Once Upon a Time in America and Pretty Woman, and whose New Regency Productions is a profilic independent outfit within Hollywood, counting LA Confidential, Mr and Mrs Smith and Fantastic Mr Fox among its credits. Next is Steven Spielberg, who aside from his celebrated directorial career has credits on a string of films through his Dreamworks studio, including the blockbuster Transformers films.

No woman features on the list, and the majority of the names are over age 50. The youngest person on the list is 40-year-old Ryan Kavanaugh, whose production company, Relativity Media, has been involved in such films as American Gangster, A Serious Man and The Social Network. James Cameron, director of the two biggest-grossing films of all time, Avatar and Titanic, manages 10th place on the list.

Full list of richest moguls

1. George Lucas – $5.4bn

2. Arnon Milchan – $5.2bn

3. Steven Spielberg – $3.3bn

4. Austin Hearst – $1.9bn

5. Ryan Kavanaugh – $1bn

6. Jeffrey Katzenberg – $910m

7. Thomas Tull – $870m

8. Jerry Bruckheimer – $850m

9. Steve Tisch – $720m

10. James Cameron – $670m