Wells Fargo

Buffett's firm says 4Q profit up 15 percent on investments

Warren Buffett's company says fourth-quarter profit improved 15 percent, but most of the gains came from the paper value of Berkshire Hathaway Inc.'s investments and derivatives contracts.

The Omaha, Nebraska-based conglomerate released its latest results Saturday along with Buffett's annual letter to shareholders.

Berkshire said it earned $6.29 billion, or $2.55 per Class B share. That's up from $5.48 billion, or $3.65 per Class B share.

The analysts surveyed by FactSet expected earnings per Class B share of $1.82, although they generally exclude investments and derivatives from their estimates. Berkshire said those operating earnings totaled $1.78 per Class B...