Steinberg boosted his stake in Tiger International.

A firm controlled by New York investor Saul P. Steinberg paid $3.3 million for an additional 350,000 shares in the Los Angeles-based parent of the Flying Tiger air cargo line. Steinberg’s Reliance Financial Corp. paid between $9.27 and $9.73 each for the shares, which were purchased between Dec. 29 and Dec. 30, according to a Securities and Exchange Commission filing. The purchase means that Steinberg and related interests now control 17.7% of Tiger’s shares.