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 |
Warrants
|
11/19/2010 |
02/24/2010 |
Common Stock
|
2,279,412
(2)
|
$
0
|
I
(2)
|
By Limited Partnerships
(2)
|
Warrants
|
11/19/2010 |
07/23/2014 |
Common Stock
|
670,623
(2)
|
$
0
|
I
(2)
|
By Limited Partnerships
(2)
|
* |
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) |
This is a joint filing by Austin W. Marxe (Marxe) and David M. Greenhouse (Greenhouse). They share voting and investment control over all securities owned by Special Situations Fund III QP, L.P. (QP), Special Situations Private Equity Fund, L.P. (PE) and Special Situations Life Sciences Fund, L.P. (LS), respectively. 2,352,942 shares of Common Stock are held by QP, 588,235 shares of Common Stock are held by PE and 705,881 shares of Common Stock are held by LS. The interest of Marxe and Greenhouse in the shares of Common Stock owned by QP, PE and LS is limited to the extent of his pecuniary interest. |
(2) |
This is a joint filing by Austin W. Marxe (Marxe) and David M. Greenhouse (Greenhouse). They share voting and investment control over all securities owned by Special Situations Fund III QP, L.P. (QP), Special Situations Private Equity Fund, L.P. (PE) and Special Situations Life Sciences Fund, L.P. (LS), respectively. 1,903,249 warrants are held by QP, 475,812 warrants are held by PE and 570,974 warrants are held by LS. The interest of Marxe and Greenhouse in the shares of warrants owned by QP, PE and LS is limited to the extent of his pecuniary interest. |