Congresswoman Jacky Rosen raised $1.56 million between October and December for her U.S. Senate bid, ending the year with $1.8 million in the bank, according to early fundraising totals released by her campaign.

Although that’s more than the $1.19 million haul she reported raising in the third quarter, she’s only increased her cash on hand by about $570,000 since the end of September, meaning she has spent about a million dollars over the last three months. Republican Sen. Dean Heller’s campaign has not yet released their fourth quarter totals; however, he had $4.19 million on hand at the end of the last reporting period.

Nevertheless, Rosen’s campaign manager Danny Kazin said in a statement that Rosen’s fundraising efforts would allow her to make “critical early investments” to win the race in November.

“We continue to be amazed by the outpouring of grassroots support for our campaign, and our strong fundraising is a testament to the fact that Nevadans are ready to send Jacky Rosen to the Senate,” Kazin said.

Rosen received more than 43,000 contributions over the course of the year; 95 percent of those were $100 or less, and the average contribution was $63, according to her campaign. Rosen raised $240,000 in the first quarter and $310,000 in the second, which stretched through the end of June, before announcing her Senate campaign at the beginning of July.

Heller brought in $1.17 million in the third quarter, $1.41 million in the second quarter and $1.41 million in the first quarter. Heller’s Republican primary challenger, Danny Tarkanian, reported raising $310,000 in the third quarter of the year, after announcing his U.S. Senate bid in early August. (Tarkanian also yet to announce his fourth quarter totals.)

By comparison, Democratic Sen. Catherine Cortez Masto’s campaign raised about $1.31 million in the last quarter of 2015 ahead of her 2016 campaign, with $1.99 million in the bank at the end of the year. However, Cortez Masto had previously raised $1.38 million in the third quarter of 2015 and $1.1 million in the second quarter of 2015, after announcing a bid to replace retiring U.S. Sen. Harry Reid in early April that year.