One of the documents contained the names, Social Security numbers, dates of birth and home addresses of 93 top officers at a financial corporation being acquired by another large financial institution.

The other document contained similar information on 14 top executives at a Fortune 100 company, including those of its chairman and CEO, the chief financial officer, vice president and controller and general counsel. One of the men in the list has been listed in the past by Forbes magazine as among the richest in America.

Both of the documents viewed by Computerworld were filed in the early to mid-90s. Searches for similar documents using commonly known company names turned up numerous results. Some of the documents on the site dated back to the mid-80s while a few appear to have been filed in the early to mid-2000s. Computerworld , however, wasn't able to independently uncover any documents containing Social Security numbers on its own.

According to Ostergren, not all of the corporate filings contain Social Security numbers, although she said she has downloaded numerous documents containing the numbers so far. She estimated there are thousands more on the site.

"These are corporate filings. The people who filed them have no clue that their SSN is sitting on a Web site open to the entire world," Ostergren said. Many of the records containing SSNs appear to be those filed by companies that are incorporated outside of Colorado, she said.