Source: Sharecast
Johnson purchased the shares on Friday at an average price of 0.38p each, for a total value of £38,250.48.
Following the transaction, Johnson now holds a beneficial interest in 14.94m ordinary Surface Transforms shares, representing 1.15% of the company's total voting rights.
As of 1620 BST, Surface Transforms shares surged 39.24% to 0.55p.
Reporting by Iain Gilbert at Sharecast.com
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