Bottas, 28, replaced the retired Nico Rosberg at Mercedes, signing a one-year deal, and currently sits third in the driver standings with two wins from 13 races, with teammate Lewis Hamilton leading the way.
Bottas said: “As a driver, I’ve been able to learn and grow massively, and we have already enjoyed some really good moments this season that I will never forget. I’ve been very impressed by the mentality, commitment and the team spirit this team holds. Partnering Lewis has also been really good, and I’m enjoying the respect we have and the will to push this team forward together.
“I’m happy to have celebrated my first race wins in a Silver Arrow. However, there’s always room for improvement and I still have not shown my full potential. I will continue to work hard on and off the track, to further improve my driving, get even better results and show that putting their trust in me was the right decision.”