Summers and Weikel formed The Helio Sequence in 1999, and played their first show in
Portland at the
Mount Tabor Theater. Their fifth album, entitled
Negotiations, was released on September 11, 2012, on Sub Pop. The Helio Sequence toured the United States with the British band
Keane in 2009, and in June 2010, they were Keane's support act in several gigs through Great Britain during the band's Night Train Tour. In September 2013, The Helio Sequence again toured the United States, this time co-headlining with
Menomena. For their 2015 self-titled album
The Helio Sequence, the band revamped the process in which they created their music. They wrote 26 songs which they sent to friends, asking them to list their favorite ten songs. Using the responses, by the end of June 2014 the band had compiled a list of ten songs for the album. The album received generally favorable reviews, with Eric Swedlund of
Paste Magazine calling it a "career-defining album". Others, such as Adam Kivel of
Consequence of Sound claimed that "it’s [the album] a reset of the odometer rather than a definitive statement of destination." They announced a tour in support of the album, beginning on April 14, 2015, in Portland and winding up on June 27, 2015, in
St. Paul, Minnesota. In September and October 2017, The Helio Sequence toured the U.S., performing 29 dates as the opening band for Australian rock band
The Church. == Band members ==