Expedition 40 began in May 2014. The second half of the crew launched later that month.

Soyuz TMA-12M
Crew: Alexander Skvortsov, Oleg Artemyev, Steve Swanson

Launch: March 25, 2014, 5:17 p.m. EDT
Docking: March 27, 2014, 7:53 p.m. EDT
Landing: September 2014

Soyuz 39
Crew: Reid Wiseman, Maxim Suraev, Alexander Gerst

Launch: May 28, 2014, 3:57 p.m. EDT
Docking: May 28, 2014, 9:44 p.m. EDT
Landing: November 2014