Mitt Romney’s diverse investments, board positions and lucrative speaking engagements have propelled the former Massachusetts governor’s worth to anywhere from $190 million to $250 million dollars.

Romney’s Friday night disclosure of his personal finances, which include value ranges for various sources of income, assets and investments, is required of all presidential candidates. The report filed with the Federal Election Commission shows that the Republican contender has amassed considerable wealth that could prove invaluable during the campaign.

Since the beginning of last year, for example, Romney has earned about $375,000 from speaking engagements at universities, conferences and private companies. At times, Romney’s appearance fee was as high as $68,000, a sum paid by both the hedge fund GoldenTree Asset Management and the International Franchise Association.

Other paid positions included a spot on the board of Marriott International, for which Romney was paid roughly $114,000 before he resigned at the start of the year.

Romney and his wife, Ann Romney, also hold investments of considerable value, including from $250,000 to $500,000 in gold and horses valued in the same range. Dozens of their financial holdings in stocks and investment funds are valued at more than $1 million.

“Governor and Mrs. Romney’s assets are managed on a blind basis. They do not control the investment of these assets. The assets are under the control and overall management of a trustee,” Romney’s campaign said in a released statement.

One endeavor from which Romney has not benefited is his book “No Apology: The Case for American Greatness.” Though the book generated from $100,000 to $1,000,000 during the reporting period, the proceeds were split between charities that included the Cystic Fibrosis Foundation, the National Multiple Sclerosis Society, Homes for Our Troops and the Boys and Girls Clubs of Boston.