The Google-backed ride sharing service raised the money at a $18.2bn valuation, and will seek to secure an extra $200m from strategics at the round's second close.

Uber, the US-based operator of a ride sharing service, secured $1.2bn in series D financing round on Friday, raised at a $17bn pre-money valuation.

Reports in May stated that Uber was raising a new funding round that valued it at $10bn, less than a year after it raised $258m from Google Ventures, TPG and Benchmark at a $3.5bn valuation. However, the end result has exceeded expectations considerably.

The news was broken in a blog post by CEO and co-founder…