The Silicon Valley branch of Wolfram & Hart played a key role in The Reckoning. They plotted an attack on Willow Rosenberg's empowerment center, receiving intel from Harth Fray, a time travelling vampire from the 23rd century. According to Angel, its layout was similar to the Los Angeles branch.
The Scooby Gang, alongside Angel and Illyria, went to attack them beforehand, only to discover that Harth, due to his access to Slayer memories, had foreseen they would be there and used it to his advantage to lure them into a trap. The Scoobies were outgunned and forced to retreat through the records storeroom.