Tech powerhouses Facebook and Amazon spent the most in their histories on lobbying in this year’s second quarter, propelling them into the top tier of K Street spenders, while other big players reported a decline in their lobbying investment.

The U.S. Chamber of Commerce, long the dominant big spender, continued its reign, despite recent turmoil in staffing and a leadership change that has raised questions about the organization’s future. The chamber, drug industry group Pharmaceutical Research and Manufacturers of America, the American Medical Association, the American Hospital Association and Northrop Grumman reported a dip in spending in the second quarter when compared with the first three months of the year, according to just filed lobbying reports.

Those decreases didn’t hurt the city’s biggest K Street practices, however.

Both Akin Gump Strauss Hauer and Feld and Brownstein Hyatt Farber Schreck posted an uptick in disclosed lobbying fees, with about $10.1 million each for the quarter, those reports show. Akin Gump has a slight edge for the first half of the year, with $19.7 million in fees disclosed under the Lobbying Disclosure Act, while Brownstein’s half-year figure is at $19.2 million.

“We had a very, very strong quarter with spectacular results,” said Marc Lampkin, who chairs Brownstein’s government relations department.