Nat. Biotechnol. 26, 1326 (2008); published online 6 December 2008; corrected after print 8 May 2009

In the version of this article initially published, the Table listing the top 20 organizations with the most US biotech patents issued in 2007 is incorrect. Pioneer Hi-Bred should be listed in 3rd place, with 123 patents. The error has been corrected in the HTML and PDF versions of the article.