Contributions From Individual Donors The bigger the circle, the more that candidate raised.

Five Democratic presidential candidates raised a combined $96 million from individual donors in the last three months — about three-quarters of the total fund-raising by the entire Democratic field, according to reports filed with the Federal Election Commission on Monday.

[Here are five lessons from the Democratic fund-raising reports.]

We crunched the latest fund-raising numbers for the candidates, and the findings paint a picture of the diverging fortunes in the 2020 race. The numbers highlight the financial challenges that many of the lesser-known candidates are facing as they seek to keep their campaigns afloat.

Buttigieg raised more money from individual donors than any other Democrat.

Mayor Pete Buttigieg more than tripled his fund-raising from the first quarter, as did Senator Elizabeth Warren. Senators Bernie Sanders and Kamala Harris raised about the same as in the first quarter. Former Representative Beto O’Rourke took in a fraction of what he raised in the first 18 days of his campaign. And former Vice President Joseph R. Biden Jr. came in second to Mr. Buttigieg, who was virtually unknown only months ago.

Amount Raised From Individual Contributions (in millions) Note: Second-quarter numbers are from April 1 to June 30. Cycle totals include all activity in the 2020 election cycle.

Sanders has the most cash in the bank.

Candidates with little cash are highly limited in their ability to build up a large campaign operation and deploy staff in early-voting states.

Cash on Hand (in millions) Note: Figures are as of June 30.

Several lower-tier candidates raised most of their money from small donors.

Democrats are eager to attract online donations from ordinary people chipping in small amounts of money, and a flood of small donations offers evidence that a candidate is generating excitement among voters. Unlike other leading candidates, Mr. Sanders and Ms. Warren are not holding high-dollar fund-raisers, putting their financial fates in the hands of online donors.

Percentage of Money From Donors Giving $200 or Less Note: Numbers are for April 1 to June 30.

The five candidates who raised the most also spent the most.

The divide between the well-funded candidates and the rest of the field is particularly clear when it comes to spending money. Mr. Sanders and Mr. Biden led the way in the second quarter. Mr. Buttigieg increased his spending more than tenfold from the first quarter but still did not top $10 million.

Amount Spent (in millions)

Many Democrats spent more than they took in.

The Iowa caucuses, the first contest of the primary race, are still more than six months away, so the campaigns need cash to sustain themselves for the long haul. A campaign’s burn rate shows how much it spent relative to its fund-raising.

Former Representative John Delaney spent far more than he raised, but he is largely financing his campaign with his own money. Among the candidates who raised more than $10 million in the second quarter, Mr. Buttigieg had the lowest burn rate.

Burn Rate Note: The burn rate shown is a candidate’s spending in the second quarter relative to individual contributions he or she received. Contribution refunds are excluded from the spending figures. The burn rate is greater than 100 percent if a candidate spent more than he or she raised.

Trump has more than twice as much cash as the best-funded Democrats.

President Trump has a big head start on the Democratic field in raising money for the 2020 election. He ended the second quarter with far more cash on hand than even the best-funded Democratic candidate.

Cash on Hand for Trump and Top Three Democrats (in millions) Note: Figures are as of June 30.

Here’s a full look at how the Democratic candidates compare.

Individual Contributions, Total Spent and Cash on Hand (in millions) Note: Cash on hand is the total amount of money the campaign had available on June 30. Individual contribution and spending data are from April 1 to June 30.

[See who led the money race in the first quarter of the year.]