More than $5.3 million was spent by statewide candidates and their allied political action committees during Vermont’s primary season. It was the most expensive primary in Vermont’s history, fueled by outside groups, a lift in the cap on individual contributions from $2,000 to $4,000, and an unprecedented sum fueled by a wealthy self-funded candidate.

This year is the first since 2010 that the governor’s seat has been vacant. Five candidates in the Democratic primary that year spent $1.7 million.

The biggest spender this season was Republican Bruce Lisman, who sunk nearly $1.85 million of his more than $50 million fortune into a prickly gubernatorial bid against Lt. Gov. Phil Scott. In all, the former Wall Street businessman spent more than $2.1 million and $907,285 of that went toward television and radio ads.

The candidates submitted final campaign finance filings on Monday for the primary race.

Lisman won 18,055 votes and spent $118 for each ballot cast.

Scott spent nearly a third less than Lisman and won by more than 20 points. He has raised $988,299 so far in this campaign, with 72 percent of his donations in amounts less than $100, according to his campaign. He spent $805,515 in the primary battle with Lisman.

Scott received $4,000 donations — the maximum allowed — from a number of sources, including the Vermont Auto Dealers Association, real estate developer Patrick Malone, and RAI Services Co., a subsidiary of tobacco company Reynolds American.

He received thousands more from companies that, like his firm Dubois Construction, work in the contracting industry.

Scott goes into the general election against Democrat Sue Minter with $158,318 cash on hand.

On the Democratic Party side, the winning candidate, Minter brought in more than $1 million throughout primary season, and spent nearly all of it. More than $568,000 was spent on advertising by the former transportation secretary, who had never run a statewide race.

Minter heads into the general election with less money on hand than Scott, just over $70,000.

Her affluent donors include Philip Lintilhac, a leader of the Lintilhac Foundation, which supports environmental causes in Vermont. The governor’s brother, Jeffrey, donated $2,600 during the campaign, former Shumlin Chief of Staff Liz Miller donated $2,000, Rep. Paul Poirier donated $1,500, former Department of Financial Regulation Commissioner Susan Donegan donated $500, Peter Clavelle, the former mayor of Burlington, gave Minter $175, writer Chris Bohjalian gave her $330 and former House Speaker Gaye Symington donated $250.

Her out-of-state supporters include Russell De Berlo, who heads an investment firm in Boston and pitched in $1,000, as well as Geraldine Laybourne, a television executive who gave Minter $2,500. Mark O’Friel, an investment banker in New York, gave Minter $4,000.

Minter also benefitted from a PAC, Vermonters for Strong Leadership, which spent $120,000 on her behalf in the days leading up to Aug. 9.

Minter finished with 49 percent of the vote in a three-way race.

The two candidates who finished directly behind Minter — Matt Dunne and Peter Galbraith — each spent sizable sums.

Dunne, who finished with 37 percent, raised more than $1 million throughout his primary campaign and spent more than $998,000. He made 30 media buys totaling more than $616,000.

While Dunne had repeatedly called out other candidates for funding their own campaigns, he put up $99,000 of his money.

Galbraith entered the race six months after his two competitors and spent more than $371,000. About half of Galbraith’s fundraising total, which was $404,000, came from the candidate himself.