A wealthy Republican donor gave another $25,000 to GOP lieutenant gubernatorial nominee E.W. Jackson in June, according to the candidate’s amended campaign finance disclosure report.

The contribution brings the total donations from Peter L. Via of Roanoke to Jackson’s campaign to $75,000 — about 20 percent of Jackson’s fundraising total of about $364,000, and more than half of his June fundraising total of about $142,000.

Jackson, a minister from Chesapeake, was outraised in June by his Democratic opponent, state Sen. Ralph S. Northam of Norfolk, who reported more than $226,000 in donations for the month. The candidates are battling for control of the Senate and would serve as tie-breaker in the evenly-divided chamber that often votes along partisan lines.

Via, a Roanoke financier, is Jackson’s single-largest individual contributor, and has donated $225,000, mostly to Republicans, since 2001.

Via’s wife, retired realtor Lynn W. Via, has donated $126,000 to Attorney General Ken Cuccinelli, the Republican nominee for governor, and has donated more than $430,000 to Republican candidates in the past decade.

Lynn Via also supported Cuccinelli when he ran for attorney general, and was a supporter of Gov. Robert F. McDonnell in 2009. In 2011, she supported state Sen. Mark D. Obenshain (R-Harrisonburg), who is running for attorney general this year.

Jackson updated his report, originally submitted on July 15, on Friday. The Virginia Public Access Project made the amended report available on Monday.

The amended report also shows Republican Party of Virginia’s 7th Congressional District, represented by U.S. House Majority Leader Eric Cantor, donated $10,000. The Senate Republican Caucus also donated $5,000.

The July 15 filing marked the second time Jackson failed to itemize all of his donors. In June, he failed to disclose a $25,000 loan in a timely fashion and was fined $100. He also reported raising more than $120,000 — $95,000 of which listed only “Jackson for Lt. Gov.” as the donor.

Jackson originally reported raising $118,000 in June. That filing failed to itemize $48,000 in entries.

State law requires contributions of more than $100 must be itemized. Failure to amend the report in a timely manner — within 10 days of notification by the State Board of Elections — can result in penalties of up to $1,000 for a single report.