CLEVELAND, Ohio -- Earlier this week, U.S. Rep. Jim Renacci's U.S. Senate campaign announced he and his allies had raised slightly more than $4.5 million, an eye-popping amount, since he jumped in the race in January.

As it turns out, $4 million of that was Renacci's own money, according to a newly available federal campaign finance filing.

A document summarizing Renacci's fundraising for the first three months of 2018 also shows he brought in $257,000 in contributions, of which about $101,400 came from political action committees. An affiliated committee raised another $253,000, and Renacci also seeded his Senate campaign with about $223,400 from his now-dormant congressional campaign.

A Federal Election Commission deadline passed Sunday for federal candidates to report their first-quarter campaign finance activity. In part because candidates are only required to postmark their disclosures that day, there is typically a lag between when the filings are submitted and when the FEC makes them publicly available online.

The Renacci campaign on Monday announced to the media that it and an affiliated committee would report having $4.2 million in cash on hand, and -- including "contributions from donors, including the candidate" -- that it had raised $4.5 million. The newly available document shows that of that, about 88 percent came from Renacci himself.

(Scroll down to read the Monday news release from the Renacci campaign -- the highlighted text is added for emphasis)

In a statement that accompanied the announcement, Renacci referenced the "wave of support from voters and conservative leaders across Ohio who have rapidly mobilized behind our campaign" and said that with so much at stake, he was "committed to helping ensure our campaign has the resources it needs to defeat Sherrod Brown in November."

Brown, a Democrat, has announced raising $3.3 million during the same time period, with $11.8 million in cash on hand.

Renacci, worth at least $34.4 million, is Ohio's wealthiest congressional representative and the 16th wealthiest member of Congress overall, according to Roll Call, a Capitol Hill publication. He is an accountant by trade, but made his fortune running a number of businesses, including a chain of nursing homes, a chain of Harley Davidson dealerships and a financial consultancy for troubled businesses.

Renacci jumped in the Republican Senate primary in January, abandoning a run for governor, after Ohio Treasurer Josh Mandel unexpectedly dropped out.

Numbers for other Republican Senate candidates -- Mike Gibbons, Melissa Ackison, Don Elijah Eckhart and Dan Kiley -- remained unavailable as of Friday.