Pete Buttigieg, the mayor of South Bend, Indiana, hasn’t officially announced that he’s running for the 2020 Democratic presidential nomination, but he said Monday that he raised more than $7 million in the first quarter.

He thanked his supporters in a Twitter message for the impressive haul.

“We (you) are out-performing expectations at every turn. I’ll have a more complete analysis later, but until then: a big thank you to all our supporters,” Buttigieg wrote in the posting.

Former Congressman Beto O’Rourke raised $6.1 million in the first 24 hours after he announced he was entering the race last month.

O’Rourke’s take narrowly beat the $5.9 million Sen. Bernie Sanders raised in the first 24 hours of his campaign announcement in February and he took in $10 million by the end of his first week.

Those amounts dwarf the funds raised by other Democratic candidates in their first day, including $1.5 million for Sen. Kamala Harris and $300,000 for Sen. Elizabeth Warren.

It took Sen. Amy Klobuchar 48 hours to raise $1 million.

Buttigieg has been gaining ground among the crowded field of Democratic candidates despite having little or no national name recognition as the 37-year-old mayor of a small town in Indiana.

A poll released Sunday shows Buttigieg, who first announced he was exploring a presidential run in January, trailing former Vice President Joe Biden and Sanders in third place in Iowa.

Biden led the field with 25 percent, Sanders followed with 24 percent and Buttigieg had 11 percent, the Emerson survey of registered voters in Iowa found.

In Emerson’s first Iowa poll in January, Buttigieg got 0 percent.

Campaigns must file their fundraising reports by April 15 but some may release their totals before the deadline to show the strength of their early support.