State Attorney General Martha Coakley and Rep. Mike Capuano led the Democratic field in fundraising in the most recent reporting period for the Senate special election, followed by Alan Khazei and Stephen Pagliuca, who is heavily augmenting his fundraising with personal contributions.

Coakley, the frontrunner in the Dec. 8 primary, raised about $2 million more for her bid over the past month and a half, nearly doubling her total receipts to $4.1 million, the campaign announced Thursday. That edges Capuano, who announced Wednesday evening that he raised $1.8 million in the period and will report $1.1 million in cash on hand in his pre-primary financial disclosure, covering the period between Oct. 1 and Wednesday.

Coakley had more than $1.9 million in cash on hand as of Wednesday.

Khazei, co-founder of national community service program City Year, continues to post strong fundraising numbers despite lagging well behind the other candidates in the polls. He pulled in more than $1.2 million in the period for a total of more than $2.3 million in receipts for his dark-horse campaign.

New York Mayor Michael Bloomberg (I) hosted a fundraiser for Khazei at his home on Thursday night, which the campaign estimated brought in another $250,000 in contributions.

Pagliuca, a partner at Bain Capital who is relying largely on his personal fortune to help fund his bid, raised $350,000 in individual donations, according his campaign. He raised just more than $200,000 in the third quarter and gave his campaign $1.8 million. The campaign has spent nearly $6 million on television advertising.

Scott Brown, the lone Republican contender in the race, raised $290,000 in the pre-primary period and spent $176,000, leaving him with $221,000 as he gears up for what is expected to be an uphill climb in the general election against the favored Democratic nominee.