According to The Guardian, Iron Maiden LLP, the holding company of British heavy metal legends IRON MAIDEN, has been cited as one of the U.K.'s fastest-growing music firms. The company, which is estimated to be earning beween £10 million and £20 milllion a year, has made London Stock Exchange's "1,000 Companies to Inspire Britain" list.Greg Mead, CEO and co-founder of Musicmetric, said: "IRON MAIDEN's BitTorrent data suggests Brazil is a huge driver of fans — and given Brazil is one of the biggest file-sharing nations on the planet, this is a strong indicator of popularity. "With their constant touring, [the] report suggests MAIDEN have been rather successful in turning free file-sharing into fee-paying fans. This is clear proof that taking a global approach to live touring can pay off, and that having the data to track where your fan bases lie will become ever more vital." IRON MAIDEN in August landed at position No. 1 on Billboard.com's "Hot Tours" list of top-grossing tours with $8.5 million in ticket sales from six performances on their summer tour of Europe. The shows were attended by a total of 121,280 fans, including a two-night, sold-out stand on August 3-4 at the O2 Arena in London, England, where the band played to 27,000 fans. With totals added from this past summer's Europe dates, overall ticket sales from the tour topped $42 million from 45 reported concerts. MAIDEN's 15th studio CD, "The Final Frontier", sold 63,000 copies in the United States in its first week of release to enter The Billboard 200 chart at position No. 4. IRON MAIDEN's previous album, 2006's "A Matter Of Life And Death", opened with 56,000 units to land at No. 9. This was a notable increase from the 40,000 first-week tally registered by its predecessor, 2003's "Dance of Death" (which debuted at No. 18 on The Billboard 200 chart), and that of "Brave New World", which moved 38,000 copies in June 2000 to land at No. 39 on The Billboard 200 chart. "The Final Frontier" was IRON MAIDEN's fourth U.K. No. 1 album. The band previously topped the chart in 1982 with "The Number of the Beast", in 1988 with "Seventh Son of a Seventh Son" and in 1992 with "Fear of the Dark".