| Kestrel Partners LLP |
35,857,245 |
£14,342,898 |
| Canaccord Genuity Group INC |
12,800,000 |
£5,120,000 |
| Richard Griffiths and controlled holdings |
9,466,611 |
£3,786,644 |
| Gresham House Asset Management Limited |
9,338,098 |
£3,735,239 |
| Herald Investment Management Limited |
9,220,740 |
£3,688,296 |
| Draper Esprit VCT plc |
7,124,999 |
£2,850,000 |
| Elderstreet VCT Plc |
7,124,999 |
£2,850,000 |
| Lombard Odier Investment Managers |
6,959,863 |
£2,783,945 |
| Chelverton Asset Management Limited |
6,779,017 |
£2,711,607 |
| Unicorn Asset Management |
6,521,405 |
£2,608,562 |
| Janus Henderson Investors |
4,625,325 |
£1,850,130 |
| Cello Health plc |
4,076,239 |
£1,630,496 |
| JO Hambro Capital Management |
3,960,000 |
£1,584,000 |
| Octopus Investments Nominees Limited |
3,222,380 |
£1,288,952 |
| Livingbridge VC LLP |
3,196,072 |
£1,278,429 |
| Tony Dillon |
3,157,894 |
£1,263,158 |
| D Alderson |
878,356 |
£351,342 |