Arriva - Arriva Denmark/Arriva Hungary - C

• In September 1997, Arriva purchased Unibus. During March 1999, Arriva Denmark expanded with the acquisition of Bus Danmark. In April 2001, Arriva acquired Denmark's largest bus operator, Combus, along with its 1,200 vehicles. In August 2004, Arriva purchased Wulff, which operated buses in Jutland and Copenhagen.
• In 2007, Arriva acquired Veolia Denmark, then Denmark's second largest bus operator with 640 buses. Arriva operates 50% of bus services in Copenhagen and 40% throughout Denmark.

• In mid-2002, Arriva began to operate services on the Varde to Nørre Nebel line. In March 2012, Arriva was awarded an extension to this franchise through to June 2018.
• During 2003, Arriva began operating an eight-year contract to operate services in mid Jutland. In March 2009, Arriva was awarded an extension through to December 2018. At one point, Arriva operated 17% of all services on the Danish rail network.

• In 2000, Arriva began operating waterbuses in Copenhagen's harbour.

• In April 2008, Arriva purchased an 80% shareholding in Eurobus Invest, Hungary's largest private bus operator, which operates services in Hungary and Slovakia. In 2009, Arriva purchased the remaining 20%. Arriva is in a joint venture with Videoton Holding operating as VT Transman.
• During May 2013, VT Transman began operating two bus contracts in Budapest for eight years, this arrangement saw 150 Mercedes-Benz Citaros added to the company's 225-strong bus fleet. The joint venture now operates under the VT-Arriva brand.

• In July 2002, Arriva purchased SAB Autoservizi and SAF – Società Autoservizi Friuli-Venezia Giulia operating in Lombardy, Liguria and Friuli-Venezia Giulia regions of northern Italy.
• During May 2004, Arriva expanded into the Udine area of the Friuli-Venezia Giulia region via the purchase of 49% of 500 bus SAF, it exercised an option in December 2005 to increase its stake to 60%. In October 2005, Arriva began operating in the Piemonte and Valle d'Aosta regions of northern Italy with an 80% shareholding in SADEM, increased to 100% in 2008. During 2006, Arriva purchased a 35% share in Trieste Trasporti, which increased to 40% in 2007.
• In June 2007, Arriva entered a joint venture with Ferrovie Nord Milano to purchase 49% of 317 bus SPT Linea, which was then renamed ASF Autolinee.
• During 2008, it took control of Brescia-based SAIA Transporti.

• In January 1998, Arriva purchased Vancom Nederland, it was followed by Veonn & Hanze in December 1998.
• During June 1999, it formed a joint venture with Nederlandse Spoorwegen to operate bus services in Friesland, four years later, Arriva took full ownership, after which it was renamed Arriva Openbaar Vervoer.
• In 2003, Arriva won further work in Drenthe and Province of Groningen. It was awarded further contracts in 2005 in Drenthe and Waterland and later in the Drechtsteden, Alblasserwaard, Rivierenland, Meierij, Oost-Brabant, and Vijfheerenlanden areas. During 2009, Arriva lost the contracts in Drenthe and Groningen upon retendering yet, in 2010, won a contract in Achterhoek and retained the Rivierenland contract. From December 2012, Arriva won the contract for South Holland North, around Leiden, Alphen aan den Rijn and Gouda and in Friesland around Leeuwarden.
• During December 2016, it acquired most of Limburg's bus and train systems.