At issue is when Romney left Bain, and whether he was at the helm when it sent jobs overseas.
The documents, filed with the U.S. Securities and Exchange Commission, place Romney in charge of Bain from 1999 to 2001, a period in which the company outsourced jobs and ran companies that fell into bankruptcy.
Romney has tried to distance himself from this period in Bain's history, saying on financial disclosure forms he had no active role in Bain as of February 1999. Obama has labeled Romney a job killer in hopes of undercutting the Republican's claim that his private business experience gives him the ability to turn around the struggling economy.
But at least three times since then, Bain listed Romney as the company's "controlling person," as well as its "sole shareholder, sole director, chief executive officer and president." And one of those documents — as late as February 2001 — lists Romney's "principal occupation" as Bain's managing director.
The Obama campaign called the SEC documents detailing Romney's role post-1999 a "big Bain lie." And Obama deputy campaign manager Stephanie Cutter said the presumptive GOP nominee may have even engaged in illegal activity.