JPMorgan's board has been pressuring Dimon to improve the bank's relationship with regulators, after a U.S. Senate subcommittee report in March detailed how the executive demanded the bank withhold trading data from one of its regulators, and later yelled at a subordinate who provided the data.
The onslaught on the bank is a distraction for JPMorgan executives but is unlikely to let up until regulatory focus turned to another bank, the source said. Dimon, the source said, was "stoic" as he navigates the situation.
Another person who knows Dimon said the CEO dislikes having to spend so much time at management and board meetings discussing probes and settlements instead of regular business.
Dieter Waizenegger, executive director of the CtW Investment Group, which had campaigned this year against the re-election of Cote and Futter, said he hopes that new board members have experience in bank regulation so that they can help repair the company's standing with the government and better guard against trading losses.
The so-called London Whale trades cost the bank more than $6 billion and have led to criminal charges against two of its former traders. Cote and Futter, who came under investor fire for failing to prevent the losses, resigned in July.
"The company got off on the wrong foot with regulators earlier this year, so someone who understands this would be helpful," said Waizenegger, whose group is a JPMorgan shareholder.
All told, JPMorgan is subject to more than a dozen probes in multiple countries.
In addition to the Justice Department probe, investors recently learned that the U.S. Securities and Exchange Commission is investigating whether the bank ran afoul of laws that forbid bribery overseas. The bank has also said that a federal investigation in California had preliminarily concluded that the bank violated securities law when it sold mortgage bonds from 2005 through 2007.
The heightened scrutiny could weigh on profits at the bank, which said in its most recent quarterly filing with regulators that additional losses from litigation, beyond what it has already set aside, could be up to $6.8 billion.
Charles Peabody, a banking analyst at Portales Partners, said litigation costs for JPMorgan and other firms could rise in coming quarters.