They have an interesting range of investments (top ten below).What's caused this do you think? That's an impressive rise!
If you look at the Composition tab here There is:
Dexcom - they make blood glucose monitoring equipment
Tesla - 'nuff said
ASML Holdings - they make lithography equipment for semiconductors
Illumina Inc - they make equipment for genetic variance analysis
M3 Inc - they have a very large medical database and provide access for researchers
Taiwan Semiconductor - obvious and very successful
Kingspan Inc - an Irish building materials company with a global presence
Umicore - they focus on recycling materials from technology items including mobile phones
CHR Hansen - they make natural solutions for the food, drink, pharmaceutical and agricultural industries.
Basically, Baillie Gifford looked away from the usual objectives and it is working very well.