Republican Rep. Jim Gibbons has raised just under $4 million for his campaign for governor, including about $1.3 million in contributions since January, according to a preliminary report obtained Friday by The Associated Press.

Gibbons has spent almost half what he's taken in and has about $2 million in cash on hand as early voting begins, his campaign said.

Gibbons collected about 20 percent of his funds this period from the gambling industry. About 17 percent was donated by developers and construction companies, and 15 percent came from physicians and the pharmaceutical and health care industry, the campaign said.

Gibbons, R-Reno, had promised in February to release an early draft of his report, as part of a call for more transparent campaign finance reporting. Candidates are not required to file final reports with the secretary of state until Aug. 8, one week before the primary, but 10 days after early voting begins.

"It is Jim Gibbons' belief that voters should be able to see who is funding each candidate's campaign before voting," campaign manager Robert Uithoven said.

Gibbons entered the reporting period out front in the money race, having raised $2.3 million and rolled over $317,000 from his congressional campaign fund.

The preliminary report shows a $5,000 contribution from KVBC Valley Broadcasting, owned by University Chancellor Jim Rogers. Rogers, who initially questioned Gibbons' intelligence, has said he was persuaded to give to Gibbons after the congressman pledged to collaborate on education issues.

Lance Gilman, a Reno-based developer and brothel owner, also gave $5,000 to the Republican congressman.

State Senate Majority Leader Bill Raggio, R-Reno, gave $1,000 from his Senate campaign committee. Raggio has said he has not taken sides in Gibbons' race against state Sen. Bob Beers and Lt. Gov. Lorraine Hunt.

Gibbons also found support from Sen. Mark Amodei, R-Carson City, and Sen. Randolph Townsend, R-Reno.

Gibbons received the maximum contribution of $10,000 from several casino interests, including Treasure Island, Bellagio, New York-New York, The Mirage and MGM Grand casinos, as well as neighborhood casino giant Boyd Gaming. Affiliates of Golden Gaming pitched in $30,000. Wynn Resorts gave $5,000.

Mining interests Barrick Goldstrike and Placer Dome Inc. contributed a combined $12,000.

No other candidates released their financial report in advance of the deadline.