The Commerce Department says wholesale business stockpiles rose 0.6 percent in November compared with October, when inventories had risen just 0.3 percent.
Sales in November surged 2.3 percent, rebounding from a 0.9 percent decline in October. It was the biggest one-month sales gain since March 2011.
More restocking leads to more factory production, which boosts economic growth. Faster restocking helped the economy grow at a 3.1 percent rate in the summer.
With the November increase, wholesale inventories grew to $498.9 billion. That's 29.6 percent above the post-recession low hit in September 2009.