As at 23rd July 2010
Number of AIM securities in issue: 102,040,551
Substantial Shareholdings
| | Number of Ordinary Shares | % of Share Capital |
| Generation Investment Management LLP | 21,080,000 | 20.7% |
Cleantech GP Limited / Zouk Ventures Limited | 10,315,681 | 10.1% |
| AXA S.A. | 6,643,682 | 6.5% |
| Oceanic Small Cap Fund | 4,847,600 | 4.76% |