iBio is on the Cruelty Free Investing list for exploiting animals because the company does animal testing for some of their medical products, services, research and therapies.
This press release specifically mentions their use of animal testing:
iBio, Inc. develops and offers pharmaceutical product applications using its iBio Technology platform. The iBio Technology platform is a proprietary gene expression technology that causes non-transgenic plants to rapidly produce high levels of target proteins and has been validated across a wide range of applications in both vaccines and biotherapeutics.
Company website: http://www.ibioinc.com