FC Thun

Until 1995

FC Thun was founded on 1 May 1898. The club played in the second Swiss division, the Nationalliga B (now known as Swiss Challenge League) from 1946 to 1950 and in the 1953–54 season. At the end of the 1953–54 season, the team finished in second place only behind FC Lugano and was promoted to the first division, the Nationalliga A (now known as the Swiss Super League), for the first time in the club's history. However, the club finished the 1954–55 season in second to last place and was relegated back to the second division after playing just one season in the top flight. In 1955, Thun reached the final of the Swiss Cup, which was lost 1–3 to La Chaux-de-Fonds.

From 1955 to 1970, Thun continuously played in the Nationalliga B, before being relegated to the Swiss 1. Liga, back then the third tier of the Swiss football league system, at the end of the 1969–70 season.

From third division to Champions League

In 1995, Andy Egli became the manager of Thun. Two years later, at the end of the 1996–97 season, Thun regained promotion to the Nationalliga B for the first time since 1970. Under manager Georges Bregy, the club took part in the 1999–2000 Nationalliga A/B playoff games, but could not secure promotion to the first league and remained in the Nationalliga B. From July 2001 to December 2004 the team was coached by Hanspeter Latour. Under his management, Thun was promoted to the Nationalliga A after 47 years of absence from the Swiss top flight at the end of the 2001–02 season. After Latour left Thun to coach Grasshopper Club Zürich, Urs Schönenberger was appointed as the new head coach.

Thun finished the 2004–05 season in second place only behind FC Basel and thus became runners-up of the Swiss championship, which was rebranded from Nationalliga A to Swiss Super League by then. This constituted the best league result in the history of the club and also secured the club a place in the qualifying rounds for the Champions League. By beating Dynamo Kyiv (3–2 on aggregate) and Malmö FF (4–0 on aggregate) in the qualifying rounds, FC Thun reached the group stages of the 2005–06 Champions League. They were drawn in Group B alongside Arsenal, Ajax and Sparta Prague. They started their campaign on 14 September 2005 away at Arsenal, where after equalising through Nelson Ferreira, they narrowly lost 2–1 after Dennis Bergkamp scored in the match's final seconds. On 27 September they hosted the Czech champions Sparta Prague at home, the Stadion Wankdorf in Bern, where all the club's European home matches were held, as the Stadion Lachen, the club's previous ground, did not meet Uefa's prerequisites for Champions League venues. Thun's 1–0 victory thanks to Selver Hodžić's 80th-minute winner propelled them into second place in the group. Following a loss to Ajax on 2 November, they lost 1–0 at home to Arsenal and with Ajax beating Sparta Prague, FC Thun exited the Champions League. However, Thun drew 0–0 with Sparta Prague in their last group match, securing third place in the group and thus qualifying for the UEFA Cup Round of 32.

Despite his success, coach Urs Schönenberger was regarded as a controversial figure by the club management because of his uncompromising nature and communication style. Just three days prior to their Uefa Cup tie against Hamburger SV, on 13 February 2006, Thun sacked Schönenberger, who had guided them to the Champions' League group stages and replaced him with Heinz Peischl. In the first leg, Thun managed a surprise 1–0 over Hamburg at the Stade de Suisse. However, Hamburg was too strong at their home, the Volksparkstadion, and managed to overturn the deficit, winning the second leg 2–0 (2–1 on aggregate).

Between first and second division

FC Thun finished the 2007–08 season in last place and was subsequently relegated to the second division. Two years later, the club won the 2009–10 Swiss Challenge League and was promoted back to the Super League under head coach Murat Yakin. Yakin led the team to a fifth-place finish in the following season but left Thun to assume the role as head coach of FC Luzern before the start of the 2011–12 season. Under the new coach Bernard Challandes, the team played in the qualifying rounds of the 2011–12 Europa League. After winning against Albanian side KF Vllaznia Shkodër (2–1 on aggregate) and advancing against Italian club US Palermo because of the away goals rule (3–3 on aggregate), Thun lost 1–5 on aggregate to Stoke City in the final play-off round and thus missed qualification for the group stages.

Urs Fischer took over management of the team in January 2013 and lead FC Thun to a fifth-place finish in the 2012–13 season. In the qualifying rounds of the 2013–14 Europa League, Thun won against Georgian team Chikhura Sachkhere (5–1 on aggregate), Swedish side BK Häcken (3–1 on aggregate) as well as FK Partizan from Serbia (3–1 on aggregate) and thus qualified for the group stages of the competition. They were drawn in Group G against Rapid Wien, KRC Genk and Dynamo Kyiv. In their group, the team won only one out of the six fixtures (1–0 against Rapid Wien) and lost the other five games, finishing last in the group and dropping out of the competition.

After finishing 4th in the 2018–19 Swiss Super League, FC Thun were eligible for the 3rd round UEFA Europa League qualifiers. Drawn against Spartak Moscow, FC Thun lost both legs and 3–5 on aggregate to the Russian team.

In 2019, FC Thun reached the final of the Swiss Cup for the second time in the club's history. They lost the game 1–2 against FC Basel. In November of the same year, Pacific Media Group (PMG), Chien Lee and The Seelig Group invested in the club and became the co-owners of FC Thun football club.

Thun finished the 2019–20 season in second to last place and had to face the runners-up team of the 2019–20 Challenge League, FC Vaduz, in the relegation play-offs. After losing 0–2 in the first leg played away in Rheinpark Stadion, the 4–3 victory in the second leg was not enough to win on aggregate, which meant that FC Thun was relegated to the Swiss Challenge League. In the following season, the club reached second place in the Challenge League and qualified for the promotion play-offs, but lost 4–6 on aggregate against FC Sion and remained in the second division. Carlos Bernegger remained as manager for the 2021–22 season which saw Thun finish in 5th place. The team were awarded was awarded the Fair Play Trophy for the dieci Challenge League.