BOSTON — Josh Kraft, son of the billionaire New England Patriots owner Robert Kraft and longtime philanthropist, has put another $3.5 million toward his mayoral campaign, bringing his total contribution to $5.5 million thus far. Kraft’s latest filing on Wednesday with the state Office of Campaign and Political Finance shows an infusion of $3.53 million in cash for the month of August, with ...

Josh Kraft speaks during a campaign event at the Ironworkers Hall.

Nancy Lane/The Boston Herald/TNS

BOSTON — Josh Kraft, son of the billionaire New England Patriots owner Robert Kraft and longtime philanthropist, has put another $3.5 million toward his mayoral campaign, bringing his total contribution to $5.5 million thus far.

Kraft’s latest filing on Wednesday with the state Office of Campaign and Political Finance shows an infusion of $3.53 million in cash for the month of August, with only a small portion coming from campaign contributions.

His campaign confirmed Thursday that the bulk of that financial filing came from Kraft’s personal bank account, to the tune of a cool $3.5 million. He last dipped into his finances in late May, by putting $2 million toward his campaign.

“Josh is investing more in this campaign because he believes in the momentum we’ve built,” Kraft campaign spokesman Max Baker said in a statement. “The excitement from voters is clear: they want government that is more transparent, that listens to them, and not only works for them, but works with them.

“Josh is committed to carrying that energy into the preliminary on Tuesday and looks forward to delivering for the residents of Boston,” Baker added.

Prior to Wednesday’s filing, Kraft had just $147,740 cash on hand, after spending nearly $1.9 million on his campaign in July, per OCPF records.

His $3.5 million personal contribution, when coupled with roughly $30,000 in political donations and nearly $2.4 million in campaign spending last month, brings his cash on hand to just shy of $1.3 million, per OCPF records.

By comparison, Mayor Michelle Wu has $2.42 million cash on hand, after raising $247,321 and spending $303,945 last month, according to her latest OCPF filing, which was also made on Wednesday.

Kraft has previously spoken about the need to keep pace with the “power of incumbency,” in terms of why he’s put millions of dollars toward his campaign. He said he’s had just months to raise money, since launching his campaign in February, compared to Wu, who he said “has had four years to raise money.”

“While Mayor Wu appears to be running her campaign out of City Hall, I have a fully staffed campaign team, including a campaign headquarters in Nubian Square,” Kraft said in May, adding at the time that “a modern campaign that includes a strong and robust field organization requires more resources than I can raise in such a short time.”

Kraft has declined thus far to release his 2024 tax return, but financial information released by his campaign last month revealed that he reported $6.3 million in income last year.

His campaign has said that his income came from “salary, interest, dividends, and gains,” along with a blind trust that has no control over and is connected to the Kraft Group, the company owned by his billionaire father.

On a recent radio appearance, Kraft indicated that the majority of his $6.3 million in income last year came from the Kraft Group, despite publicly available 990 forms that show he was not paid a salary in recent years as head of his family’s charitable foundation.

Prior to heading the New England Patriots Foundation, Kraft drew a roughly $350,000 salary as head of the Boys and Girls Clubs of Boston in fiscal year 2020, according to publicly available 990 forms.

His father, Robert Kraft, has a net worth of $11.8 billion.

The Wu campaign accused the Kraft family of trying to buy Josh Kraft a job, in response to his latest personal campaign contribution.

“It’s more clear than ever: Josh Kraft is relying on his inherited wealth — and the support of Trump donors, millionaires, and billionaires — to prop up his floundering campaign,” the Wu campaign said Thursday in a statement. “But our city is not for sale, and Bostonians will not back down from making progress and continuing to move forward in this critical moment.”

----------