Struggling teen retailer Wet Seal Inc. faces an informal Securities and Exchange inquiry into its second-quarter results from 2004.

Regulators have requested documents related to the 2004 sale of Wet Seal stock by Canadian lingerie retailer La Senza Corp.

Montreal-based La Senza’s chairman and chief executive, Irv Teitelbaum, stepped down as Wet Seal’s longtime chairman in August to focus on expanding La Senza.

La Senza said in July it planned to sell its 3.1 million shares of Wet Seal.

The probe is focusing on the timing of the stock sale and news out of Foothill Ranch-based Wet Seal in early August. The retailer posted a $102.8 million quarterly loss on Aug. 19.

Word of the probe is latest bad news for Wet Seal, which is struggling to overcome slumping sales and big losses.

Earlier this month, Wet Seal was hit with a lawsuit that consolidates other class action complaints against the company.

Teitelbaum oversaw Wet Seal for years in close alliance with former chief executive Kathy Bronstein, who ran the company for 11 years until Teitelbaum fired her in 2003.