FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * TEW WILLIAM P PHD   2. Issuer Name and Ticker or Trading Symbol BIOTIME INC [BTX] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Commercial Officer (Last) (First) (Middle) 1301 HARBOR BAY PARKWAY 3. Date of Earliest Transaction (Month/Day/Year) 02/20/2013 (Street) ALAMEDA, CA 94502 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Shares, no par value               47,125 (1) D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Option to Purchase Common Shares

$ 4.22

02/20/2013

J

100,000

(2)

02/19/2020

Common Shares

100,000

$ 0

100,000

D

Option to Purchase Common Shares

$ 4.17

(3)

10/02/2018

Common Shares

3,850

3,850

D

Option to Purchase Common Shares

$ 7.47

(4)

03/20/2018

Common Shares

25,000

25,000

D

Warrant to Purchase Common Shares

$ 10

03/21/2011

05/02/2014

Common Shares

29,247

29,247

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
TEW WILLIAM P PHD 1301 HARBOR BAY PARKWAY ALAMEDA, CA 94502			Chief Commercial Officer

Signatures

/s/ William P. Tew		02/22/2013
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Does not include shares that may be acquired upon the exercise of certain stock options, and shares that may be acquired upon the exercise of certain warrants.
(2)	1/48th of the number of options will vest and become exercisable at the end of each full month of employment after January 1, 2013.
(3)	1/48th of the number of options will vest and become exercisable at the end of each full month of employment after October 4, 2011.
(4)	1/48th of the number of options will vest and become exercisable at the end of each full month of employment after March 21, 2011.

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