1. Title of Derivative Security (Instr. 4) |
2. Date Exercisable and Expiration Date (Month/Day/Year) |
3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) |
4. Conversion or Exercise Price of Derivative Security |
5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5) |
6. Nature of Indirect Beneficial Ownership (Instr. 5) |
Date Exercisable |
Expiration Date |
Title |
Amount or Number of Shares |
Employee Stock Option (right to buy)
|
Â
(1)
|
12/18/2010 |
Common Stock
|
6,667
|
$
5.33
|
D
|
Â
|
Employee Stock Option (right to buy)
|
Â
(2)
|
02/28/2011 |
Common Stock
|
6,667
|
$
5.33
|
D
|
Â
|
Employee Stock Option (right to buy)
|
Â
(3)
|
05/16/2016 |
Common Stock
|
13,334
|
$
8.18
|
D
|
Â
|
Employee Stock Option (right to buy)
|
Â
(4)
|
04/25/2017 |
Common Stock
|
13,334
|
$
13.43
|
D
|
Â
|
* |
If the form is filed by more than one reporting person, see Instruction 5(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) |
These options vest and become exercisable in a series of twenty-three successive equl monthly installments of 278 shares, beginning on December 1, 2005, with a final installment of 273 shares becoming exercisable on November 1, 2007. |
(2) |
These options vest and become exercisable in a series of twenty-three successive equal monthly installments of 278 shares, beginning on March 1, 2006, with a final installment of 273 shares becoming exercisable on February 1, 2008. |
(3) |
These options vest and become exercisable in a series of installments. The first installment, which consisted of 25% of the total aggregate number of options granted, vested on May 16, 2007. The remaining options vest and become exercisable in a series of thirty-five successive equal monthly installments of 277 shares, beginning on June 1, 2007, with a final installment of 305 shares becoming exercisable on May 1, 2010. |
(4) |
These options vest and become exercisable in a series of installments. The first installment, which consists of 25% of the total aggregate number of options granted, will vest on April 25, 2008. The remaining options vest and become exercisable in a series of thirty-five successive equal monthly installments of 278 shares, beginning on May 1, 2008, with a final installment of 270 shares becoming exercisable on April 1, 2011. |