Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2014

BioTime has issued warrants to purchase its common shares. Activity related to warrants in 2014 and 2013 is presented in the table below:

	Number of Warrants			Per share exercise price		Weighted Average Exercise Price
Outstanding, January 1, 2013		556,613		$	10.00	$	10.00
Issued in 2013		9,195,002			5.00		5.00
Outstanding, December 31, 2013		9,751,615		$	5.00 – 10.00	$	5.29
Exercised in 2014		(556,613	)		10.00		10.00
Retired in 2014		(313	)		5.00		5.00
Exercised in 2014		(10	)		5.00		5.00
Outstanding, December 31, 2014		9,194,679		$	5.00	$	5.00

Summary of stock option activity for subsidiaries

A summary of all option activity under the subsidiary option plans (See Note 10) for the years ended December 31, 2014 and 2013 is as follows:

	Options Available for Grant			Number of Options Outstanding			Weighted Average Exercise Price
January 1, 2013		6,041,556			7,816,413		$	0.93
Increase option pool		500,000			-			-
Granted in 2013		(4,434,995	)		4,434,995			2.11
Expired/Forfeited/Exercised in 2013		785,000			(785,000	)		1.95
December 31, 2013		2,891,561			11,466,408		$	1.32
Granted in 2014		(1,603,167	)		1,603,167			6.59
Expired/Forfeited/Exercised in 2014		1,368,904			(1,368,904	)		2.28
December 31, 2014		2,657,298			11,700,671		$	1.98

- Definition

Tabular disclosure of warrants or rights issued. Warrants and rights outstanding are derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential. The main difference between warrants and call options is that warrants are issued and guaranteed by the company, whereas options are exchange instruments and are not issued by the company. Also, the lifetime of a warrant is often measured in years, while the lifetime of a typical option is measured in months. Disclose the title of issue of securities called for by warrants and rights outstanding, the aggregate amount of securities called for by warrants and rights outstanding, the date from which the warrants or rights are exercisable, and the price at which the warrant or right is exercisable.

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