| Kestrel Partners LLP |
35,857,245 |
£13,805,039 |
| Canaccord Genuity Group INC |
12,800,000 |
£4,928,000 |
| Gresham House Asset Management Limited |
9,338,098 |
£3,595,168 |
| Herald Investment Management Limited |
9,220,740 |
£3,549,985 |
| Richard Griffiths and controlled holdings |
8,911,955 |
£3,431,103 |
| Chelverton Asset Management Limited |
8,396,425 |
£3,232,624 |
| Draper Esprit VCT plc |
7,124,999 |
£2,743,125 |
| Elderstreet VCT Plc |
7,124,999 |
£2,743,125 |
| Unicorn Asset Management |
6,521,405 |
£2,510,741 |
| Lombard Odier Investment Managers |
5,132,232 |
£1,975,909 |
| Janus Henderson Investors |
4,625,325 |
£1,780,750 |
| Cello Health plc |
4,076,239 |
£1,569,352 |
| JO Hambro Capital Management |
3,960,000 |
£1,524,600 |
| Octopus Investments Nominees Limited |
3,222,380 |
£1,240,616 |
| Livingbridge VC LLP |
3,196,072 |
£1,230,488 |
| Tony Dillon |
3,157,894 |
£1,215,789 |
| D Alderson |
878,356 |
£338,167 |