Much changed and much stayed the same Monday when all of K Street scrambled to file the first-ever quarterly accounting of lobbying firm revenues.

What does not appear to have changed, though, are the identities of the biggest dogs on K Street; Patton Boggs, Akin Gump, Van Scoyoc Associates, and Cassidy & Associates are among the largest firms in terms of revenue.

The filing deadline marked a milestone for lobbying firms, which will have to electronically report their lobbying revenues on a quarterly basis from now on, instead of semiannually. Starting this year, the firms also have to provide information about some smaller clients and about their lobbyists’ former jobs on Capitol Hill and within federal agencies.

BGR Holdings, which ranked fifth last year with $22.7 million, did not reply to a request for comment.

Congress enacted the new lobbying registration and reporting law in 2007 as a reaction to scandals involving lobbyists and lawmakers, such as disgraced lobbyist Jack Abramoff’s conviction for influence-peddling and that of Randy “Duke” Cunningham (R-Calif.), an ex-House member who was convicted and imprisoned for corruption.

Akin Gump partner Joel Jankowsky, who heads the firm’s lobbying practice, said he was pleased with the first quarter of this year compared to the first half of 2007. “Depending on what next quarter looks like, it looks like [we are] on track,” he said.

Cassidy & Associates Chief Operating Officer Gregg Hartley said, “We’ve got a very strong first quarter,” including the $1.2 million in lobbying revenue from their Rhoads Group subsidiary.

Likewise, Van Scoyoc affiliate Capital Decisions had $615,000 in lobbying revenue.

“Numbers are going to be static or down a little this year,” cautioned Mike House, the director of Hogan & Hartson’s legislative group. “There’s just not a lot of legislation moving” and the presidential campaign “kind of overrides everything,” he said.