Business-to-business company

Ventro

(VNTR) - Get Report

was down 3.5% in midmorning.

The company said Wednesday night that

Nasdaq

has begun examining whether to delist its stock because it no longer meets the minimum requirement of $4 million in net tangible assets. The struggling company's stock has plunged below $1 from a 52-week high of $136.

Business-to-business stocks were broadly lower.

Ariba

( ARBA) was down 8.3% after hitting a 52-week low of $9.13.

Commerce One

( CMRC) also hit a 52-week low at $8.85 and was down 5.6%.

PurchasePro

(PPRO)

, socked by a downgrade Wednesday, also touched a year's low today at $5.81, before bouncing slightly. It was down 1.6%.