The evaluation shows that in the last 10 years only between 20% and 40% of the Oscar-nominated titles did not celebrate their premiere at a festival. This suggests “that a festival launch is increasingly useful to an Oscar campaign“. By far the greatest Oscar relevance is demonstrated by the Venice Film Festival with 39 premieres of the current 106 Oscar nominations, followed by Cannes with 13 premieres with Oscar nominations. The fact that not only the so-called A-film festivals set the tone with regard to Oscar nominations is proven by Toronto with 9 nominated premieres, Sundance and Telluride with 4 each, followed by SXSW and the Berlinale with 2 premieres each and the internationally renowned documentary film festival IDFA with one premiere
You can find the complete evaluation: here