Transaction in Own Shares

Scottish Mortgage Investment Trust PLC

Legal Entity Identifier: 213800G37DCS3Q9IJM38

Purchase of Own Securities

On 16 February 2018, the Company purchased 2,265,531 ordinary shares at a price of 456.88p.  The shares purchased will be held in Treasury.

Following the transaction the Company holds 23,367,671 shares in Treasury.

The shares in issue less the total number of shares in Treasury are 1,398,363,209.

The above figure (1,398,363,209) may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, Scottish Mortgage Investment Trust PLC under the FCA's Disclosure and Transparency Rules.

Baillie Gifford & Co Limited

Company Secretaries

16 February 2018

Regulated Information Classification: Acquisition or disposal of the

issuer's own shares