|American Stock Transfer & Trust Company|
|Attn: Reorganization Department|
|6201 15th Avenue|
|Brooklyn, New York 11219|
BioTime, Inc. (NYSE Amex:BTIM). BioTime announced today the change of its stock ticker symbol on the NYSE Amex. Additionally, BioTime announced today that it is extending the expiration date of its common share purchase warrants that expire on October 31, 2010. BioTime announced that commencing November 2, 2010, the trading symbol of its common shares on the NYSE Amex will change from BTIM to BTX. Because October 31 is a Sunday, BioTime is extending the warrant expiration date and time until 5:00 p.m. New York time on Monday, November 1, 2010. Trading of the warrants on the NYSE Amex will continue through October 29, 2010. BioTime will permit exercises of the warrants to be accepted by the warrant agent through a notice of guaranteed delivery from a bank, a trust company, or a New York Stock Exchange member guaranteeing delivery of a properly completed and executed warrant certificate. Warrant holders who choose to exercise their warrants through a notice of guaranteed delivery must pay the exercise price of their warrants and must deliver the notice of guaranteed delivery to the warrant agent by facsimile telecopy or otherwise not later than 5:00 p.m. New York time on Monday, November 1, 2010. The warrant agent will not honor a notice of guaranteed delivery unless the warrant agent receives payment of the exercise price of the warrants and the notice of guaranteed delivery by 5:00 p.m. New York time on the warrant expiration date, and the warrant agent receives a properly completed and executed warrant certificate by the close of business (5:00 p.m. New York time) on the third business day after the warrant expiration date. Warrant holders who desire to exercise their warrants should deliver their properly completed warrant certificates and notices of guaranteed delivery to the Warrant Agent, American Stock Transfer & Trust Company, by hand, mail, express mail, or overnight courier at the following address:
Notices of Guaranteed Deliver (but not warrant certificates) may also be delivered to the Warrant Agent by facsimile at (718) 234-5001. All facsimile transmissions should be confirmed by contacting the Warrant Agent by telephone at 1-877-248-6417.