More and more large public U.S. companies are reporting on their sustainability efforts. According to a recent report from the Sustainable Investment Research Analyst Network (SIRAN), 86% of the Standard & Poor's 100 companies had sustainability information on their websites by the end of 2007, up from 58% in the middle of 2005. Almost half the S&P 100 companies produced a sustainability report last year, an increase of 26% from 2005. Curious about a particular company? The SIRAN website includes the results for each company on the S&P 100.