This company successfully cloned calves and an endangered ox, the guar. They are the only company in the United States to openly pursue the highly controversial therapeutic human embryo cloning. They also are focusing a lot of their research on human embryonic stem cells and towards that end moved their headquarters to California, where voters passed Proposition 71, a “Stem Cell Initiative” that provides $3.0 billion of funding over the next ten years for stem cell research in the state of California. Press releases are on the Web page. In 2007 they acquired their former competitor company, Infigen, which cloned pigs and cattle and received a critical patent for the nuclear transfer process.

In September, 2000, this company cloned a famous Holstein bull in collaboration with the University of Montreal Veterinary Faculty. This was the first cloning of an animal from an adult somatic cell in Canada.

A premier livestock cloning company that has produced hundreds of cloned calves. PerPETuate, a pet cell banking company, is in partnership with Cyagra, using the cell banking technology to store cells from pets in hopes that one day pet cloning will be technically possible.

This company had a development agreement with Texas A&M University and invested money particularly in research for cloning dogs and cats in order to have a business cloning people's pets. They worked on the "CopyCat project" which funded the successful creation of a cat clone in February 2002. The fact that the cloned cat was not identical to the donor cat was a public relations problem for the company. The dog cloning technology was not successful, and the company is now closed. Other companies such as Viagen and PerPETuate (see above) are gene banking pets in hopes that cloning will be possible some day

Geron acquired Roslin Bio-Med (a company formed by the Roslin Institute) in 1999 and now owns their patents on the nuclear transfer process. A list of their patents is available under their Product Development link. One of their focuses now is human embryonic stem cell research.

Formerly in the United States, but currently established as a South African Biotechnology Company, Lazaron now focuses on regenerative cell technologies. Their Animal Bio-cell Division does store genetic material from wildlife, livestock and pets for future cloning procedures, however, this is only one of their many projects. Much of their work is with stem cells.

This is the research institute at which Ian Wilmut and his research group originally cloned Dolly in collaboration with PPL Therapeutics, see above. Geron (see above) has now acquired their patents. The Roslin Institute Web site includes a public interest section on cloning.