If you'd invested in: WANDisco and Strat Aero

WANdisco (Aim: WAND) makes cloud-based data management software. It's had an eventful year. A boardroom battle saw the loss-making company's co-founder and chief executive, Dave Richards, "forced to resign". Within weeks, Richards had returned, and the chairman and CFO left. The share price soared after listing in 2012, only to then lose 94% of its value, but investors who put money in in the last year have seen a return of 130%. It has been something of a wild ride, however.

Be glad you didn't

Strat Aero (Aim: AERO) develops training programmes and software for collecting data via unmanned aerial vehicles, with operations in Houston, New York, London and Singapore. The company made a pre-tax loss of $2.1m in the six months to 30 June, up from $1.3m in the same period the previous year. The chairman expects the company to "require additional funding during the fourth quarter", but believes it has "all the key ingredients in place to succeed". The share price has fallen by over 90% in the last year.

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