In a FBI/DoJ call, the FBI DC assistant director in charge said they have received more than 200,000 tips from the public trying to identify participants in the attack on the Capitol.
They have identified 400 individuals and have arrested135

FBI Washington Field Office Assistant Director In Charge Steven D'Antuono: "What happened at the Capitol on January 6 has not occurred in over 200 years. We are committed to finding out how and why it occurred."

Acting U.S. Attorney Michael Sherwin on Capitol riot charges: "regardless of the level of criminal conduct -- we're not selectively only charging the most serious crime. If a crime was committed, we are charging you, regardless of whether you were outside or inside the Capitol"

Acting U.S. Attorney Michael Sherwin on pursing charges in the attack on the Capitol on January 6: "If a crime was committed we are going to track that person down and they will be charged."

The FBI assistant director in charge said they have over 150 federal cases charged and over 50 superior court cases. Almost all of the 150 cases involve felonies and can carry up to 20years in prison
They have issued more than 500 combined search warrants and grand jury subpoenas

Acting U.S. Attorney Michael Sherwin said they are also looking into individuals who were targeting members of the media to commit assault and violence
"It's the height of hypocrisy: some of these first amendment protesters targeted and directly attacked members of the media"

30-40 cases are related to assaults on officers and they have created a special team devoted to investigating the death of Officer Sicknick

They are looking into individuals involved with the Proud Boys, the Three Percenters, the Oath Keepers, but added "there were plenty of people who were not affiliated with these groups" who took part in the Capitol attack.

Investigators are still seeking information on suspects who beat Capitol Police officers during the riot, as well as the person or group behind the placement of pipe bombs near the RNC and DNC https://www.bloomberg.com/news/articles/2021-01-26/justice-department-officials-vow-more-charges-over-capitol-riots?sref=kiFHtrGv