Republican Tim Donner, the wealthy executive director of Great Falls-based Horizons Television Inc., has donated $100,000 to his campaign for U.S. Senate next year.

With his own contribution, Donner finished ahead of Jamie Radtke in the most recent fundraising period for the Republican primary.

Donner raised $133,241 for the three-month period that ended Sept. 30, while Radtke, former chairwoman of the Virginia Tea Party Patriots Federation, collected more than $116,000 in donations during the same period.

But both their totals were dwarfed by former senator and governor George Allen, the heavy favorite to win the Republican nomination in the contest to succeed retiring Sen. James Webb (D. As we reported last week, Allen raised more than $900,000 and had $1.8 million in the bank.

The two other Republicans in the race — Hampton Roads lawyer David McCormick and Bishop Earl Jackson — have not released their fundraising numbers. They did not immediately return messages.

Donner has raised more than $339,000 since getting into the race in the spring. Radtke has raised more than $370,000 since late last year.

Donner is the great-grandson of William H. Donner, a wealthy steel tycoon, and is the secretary of the William H. Donner Foundation, a philanthropic organization with more than $100 million in assets. The candidate’s father, Joseph W. Donner, is a former stockbroker who helped found the conservative magazine National Review.

He has not said how much he would spend on this campaign but has said previously said the final amount “will be substantial enough to make a difference.”