By Catalina Camia, Jackie Kucinich and Paul Singer

USA TODAY

Mitt Romney's net worth has not significantly changed and remains between $190 million and $250 million, according to the Republican's presidential campaign.

Romney today submitted his personal financial disclosure report for last year, detailing in broad ranges the value of his assets and liabilities.

His report indicates assets with a value ranging between $83 million and $255 million, according to USA TODAY's estimate. The Romney campaign says the true range of Romney's assets is between $190 million and $250 million -- same as last year.

The report lists no liabilities, such as mortgages or loans, but he has several investment funds that could require additional investment of up to about $3 million.

"Governor and Mrs. Romney's assets are managed on a blind basis. They do not control the investment of these assets, which are under the control and overall management of a trustee. The trustee is Brad Malt, a partner at Ropes & Gray law firm," Andrea Saul, a campaign spokeswoman, said by e-mail.

Romney's wealth has been an issue in the campaign, as some critics have sought to show that the former Massachusetts governor is unable to connect with middle-class voters.

President Obama's net worth is between $2.6 million and $8.3 million.

Romney's report shows the presumptive GOP presidential nominee has sold many stocks in a wide range of companies -- including Procter & Gamble, Aflac, American Express, Apple, ExxonMobil, Google and JPMorgan Chase -- that were part of accounts managed by Goldman Sachs and Thornburg Investment Management.

The capital gains earned from the two account sales were reported as being between $100,000 and $1 million each, according to the report. Overall, he reported capital gains worth at least $4.5 million.

The new report also shows Romney received $189,975 from speeches, including two made in 2010 in which payment was received last year. According to his report, Romney most recently earned $68,000 for a speech to the International Franchise Association in Las Vegas in February.

Romney's writings have also provided some income. The report shows he received between $201 and $1,000 from a reprint of an op-ed column he wrote for The New York Times.

For his book, No Apology, Romney earned between $50,000 to $100,000 in royalties last year -- all of which were donated to charity.

Romney's holdings aren't all in securities. Like his rival Ron Paul, Romney also owns gold, worth between $250,000 to $500,000.