Newly filed financial disclosures show former Tennessee Gov. Phil Bredesen would become one of the richest members of Congress if elected to the U.S. Senate.

Bredesen's disclosures include reporting between $88.9 million and $358 million in total investment assets between January 2017 and last month.

During that same time period, the Nashville Democrat also had between $3.3 million and $20.1 million in income.

The disclosure, which is required of all Senate candidates, is the first such reporting Bredesen has had to file since entering the race late last year and gives an inside view of his finances since his departure from the governor's office in 2011.

But the disclosure does not encompass the entirety of Bredesen's personal wealth. Federal disclosures do not require candidates to disclose the value of their personal residence or its contents, and vehicles, including cars and planes.

Bredesen, who earned millions as a health care executive before becoming Nashville mayor and later Tennessee governor, filed the disclosure with the U.S. Senate this week, telling reporters Friday that he did not plan on releasing his income tax returns during the campaign due to the rigorous federal reporting requirements.

Bredesen's decision to not release his tax returns is a break from when he was governor.

"I actually think this is much more comprehensive than the income tax returns," he said, referring to the U.S. Senate disclosure. "I'm doing what the law requires."

In the governor's race:

►Candidate tax returns: Diane Black, husband had $78.6M in taxable income from 2013-2016

►Randy Boyd, wife earned $30M in last two years, tax records show

►Karl Dean, wife earned $19M over 4-year stretch, tax report shows

Bredesen's assets appear to put him somewhere in the top 10 among the current richest members of Congress, according to a recent list reported by Roll Call. Retiring Sen. Bob Corker, R-Tennessee, whose seat Bredesen is seeking, is ranked 25th on that list. The only senators in the top 10 are Sen. Mark Warner, D-Virginia; Sen. Richard Blumenthal, D-Connecticut; and Sen. Dianne Feinstein, D-California.

Bredesen's financial disclosure includes a summary of all assets, which include stocks in his solar energy company, Silicon Ranch Corp., which he founded after leaving the governor's office in 2011; Johnson & Johnson; Procter & Gamble Co.; ONEOK Inc., a natural gas company; and Schlumberger Limited, the world's largest oilfield service company.

Earlier this year, Silicon Ranch Corp. entered into a deal that could total $217 million with global oil and gas corporation Shell.

► Related:Bredesen's Silicon Ranch solar company gains Shell investment of up to $217M

Bredesen’s disclosure also features investments in nearly 100 government securities, including several charter schools around the country, which were selected by his investment manager and unknown by the former governor until the disclosure.

Should he be elected to the U.S. Senate, Bredesen said he would resign from his position as chairman of Silicon Ranch.

Bredesen also serves on an advisory board of the Bill and Melinda Gates Foundation. He said he's been on leave without compensation since his December announcement and would resign from the foundation if elected.

The disclosure also includes details that Bredesen annually receives a nearly $111,000 pension from his eight years as governor, when he declined to take a salary.

When Bredesen entered the governor’s office in 2003, he estimated his net worth was between $100 million and $250 million. At the time, he put an investment portfolio of about 90 holdings into a blind trust.

Compared to Bredesen, U.S. Rep. Marsha Blackburn, who is seeking the Republican nomination for the U.S. Senate, ranked 473rd out of 530 members of Congress in net worth, according to annual review of wealth conduct by Roll Call.

Blackburn listed $200,000 in minimum assets and $400,000 in liabilities, leaving her with a negative net worth, according to Roll Call.

Unlike Bredesen, the Brentwood Republican is not required to file such disclosures with the U.S. Senate because she is a member of the U.S. House of Representatives. But Blackburn will have to file some financial disclosure later this year.

Wealth is not uncommon for Tennessee elected officials and politicians. U.S. Rep. Diane Black, R-Gallatin, who is running for governor, ranks 14th on the Roll Call list with a net worth estimated at $38 million, according to the publication.

Gov. Bill Haslam's net worth is $2.4 billion, according to a recent Forbes analysis, thanks to his family's Pilot Flying J truck stop chain. Haslam has previously disputed the accuracy of the annual Forbes review.

Despite his wealth, Bredesen pushed back against any suggestion that he would be trying to buy the U.S. Senate seat.

“I think the public is vastly smarter than that. Over my years in public life I have on occasion funded my own campaigns and on occasion raised money. The difference between the two is I have always lost the ones that I funded myself."

Bredesen said he currently does not plan on contributing to his campaign but did not discount the possibility in the future.

“For cash flow purposes I’m perfectly willing to lend money to the campaign,” he said.

As he said when he entered the race, Bredesen estimated it could cost as much as $50 million to win the election, including $17 million to $20 million in contributions and an additional $30 million for independent expenditures.

“It’s an absurd number,” he said. “But that’s the state of it today. And I’m in it to win.”

Dave Boucher contributed to this report.

Reach Joel Ebert at jebert@tennessean.com or 615-772-1681 and on Twitter @joelebert29.