Pence had $5.5 million in the bank as of July 1 and Gregg had $3 million. The campaigns released their fundraising tallies for the three-month stretch from April through June on Monday.
Gregg began closing a massive fundraising gap by raising $1.8 million in the last quarter. Indiana Democrats say his choice of state Senate Minority Leader Vi Simpson as a running mate has helped with fundraising.
Pence reported raising $3 million in the same time span. One-third of that came in a single donation from the Republican Governor's Association.
Money will play a greater role in the months ahead as the campaigns begin spending more on campaign commercials.