|Date of birth||20 June 1980|
|Place of birth||Cirié, Italy|
|Height||1.77 m (5 ft 9 1⁄2 in)|
|Playing position||Right winger|
|1999–2000||→ Salernitana (loan)||24||(0)|
|2000–2002||→ Torino (loan)||19||(1)|
|2002||→ Ternana (loan)||13||(0)|
|2002–2003||→ Vicenza (loan)||31||(3)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 16 May 2010
‡ National team caps and goals correct as of 17 October 2007
Early years with Torino and Inter and loan spells
Semioli, a Piedmontese, made his professional debut playing for local club Torino Calcio during the 1998–99 season. Semioli and his teammate Riccardo Fissore were then signed by Internazionale in June 2000, in a co-ownership deal for a total of 6 billion lire; as part of the deal, Fabio Galante moved to Turin for 5.1 billion lire. Semioli spent seasons back on loan with Torino, and on loan at Ternana and Vicenza, while Torino bought back Fissore for 2 billion lire in June 2001; in total, Inter received 1.1 billion lire in net cash from Torino for Galante.
In June 2003 Internazionale bought the remain half from Torino, and then joint-owned with Chievo in July for €1.05 million, as part of the loan fee of Luciano. Chievo got full ownership in June 2005 for €500,000 as part of Júlio César's deal.
He became one of the most representative players for Chievo, and was one of the main protagonists of the very impressive 2005–06 season contributing 2 goals and 12 assists. One of the top assisters that season.
He scored Fiorentina's first UEFA Cup goal against FC Groningen and scored crucial goals against Atalanta and Parma which allowed Fiorentina to surpass AC Milan for the final Champions League spot. In the 2008–09 season Semioli was widely believed to be on his way out because of the tactic change and the arrival of players such as Stevan Jovetic. However, after season ending injuries to Adrian Mutu and Mario Santana, Semioli found his way back onto the first team, and was a valuable asset to Gilardino, providing him with many crosses and being a terror on the wings.
Following the arrival of Marco Marchionni to Fiorentina, in July 2009, for €4.5 million, it was confirmed that Semioli was transferred to Sampdoria as a four-year deal, for €4 million fee in August, rejoining his former coach at Chievo, Luigi Delneri. Franco scored his first goal 13 February with a header against his former team Fiorentina which gave Bluecerchiati the lead.
After three years at Sampdoria, Semioli was transferred to former club Vicenza in a deal that included Sampdoria team-mates Marco Padalino and Zsolt Laczkó moving in the same direction, all for free.
In the 2006 FIFA World Cup he was one of the four backup players for the 23-men main squad chosen by manager Marcello Lippi to step in for any possible injuries. However, he was not called up to the final 23-man squad and thus never received a winners medal. On 16 August 2006, Semioli made his Italy national team senior debut in a 2–0 friendly defeat against Croatia, in Livorno, under Roberto Donadoni.
- F.C. Internazionale Milano S.p.A. bilancio (financial report and accounts) on 30 June 2001, PDF purchased from C.C.I.A.A. (in Italian)
- F.C. Internazionale Milano S.p.A. bilancio (financial report and accounts) on 30 June 2000, PDF purchased from C.C.I.A.A. (in Italian)
- "Galante Ceduto al Toro di Simoni" (in Italian). inter.it. 20 June 2000. Retrieved 2010-01-03.
- "Transfer Market: Co-ownership Issues Resolved". inter.it. 25 June 2003. Retrieved 2010-01-03.
- FC Internazionale Milano SpA Report and Accounts on 30 June 2004, PDF purchased from CCIAA (in Italian)
- "Luciano Signs for Inter". inter.it. 8 July 2003. Retrieved 2010-01-03.
- FC Internazionale Milano SpA Report and Accounts on 30 June 2005, PDF purchased from CCIAA (in Italian)
- "Co-ownership Deals Resolved 1". inter.it. 27 June 2005. Retrieved 2010-01-03.
- ACF Fiorentina SpA Report and Accounts on 31 December 2007, PDF purchased from CCIAA (in Italian)
- "Acquisito Semioli" (in Italian). ACF Fiorentina. 19 July 2007. Archived from the original on 23 August 2007. Retrieved 20 July 2007.
- "Fiorentina: acquistato Semioli" (in Italian). Rai sport. 19 July 2007. Archived from the original on 19 June 2007. Retrieved 2007-08-02.
- "Agreements with ACF Fiorentina S.p.A." (PDF). Juventus FC. 15 July 2009. Retrieved 3 November 2012.[permanent dead link]
- ACF Fiorentina SpA Report and Accounts on 31 December 2009 PDF purchased from CCIAA (in Italian)
- UC Sampdoria SpA Report and Accounts on 31 December 2009 PDF purchased from CCIAA (in Italian)
- "Nuova linfa sulla destra: ecco "Franchino" Semioli" (in Italian). U.C. Sampdoria. 19 August 2009. Archived from the original on 28 July 2012. Retrieved 3 November 2012.
- "Laczko, Padalino e Semioli passano al Vicenza" (in Italian). UC Sampdoria. 7 September 2012. Archived from the original on 14 March 2014. Retrieved 30 September 2013.
- UC Sampdoria "bilancio" (Financial Report and Accounts) on 31 December 2012 PDF purchased from CCIAA (in Italian)
- Manlio Gasparotto (26 July 1999). "L' Italia a un passo dall' Europa" (in Italian). La Gazzetta dello Sport. Retrieved 20 January 2017.
- Erik Garin (3 February 2004). "European U-18 Championship 1999". RSSSF. Retrieved 20 January 2017.
- "Comunicato Stampa" [Press Release] (PDF). FIGC (in Italian). 15 May 2006. Retrieved 28 August 2011.
- "Lippi ha fiducia, nonostante tutto Convocato Buffon: "E' sereno"" (in Italian). La Repubblica. 15 May 2006. Retrieved 20 January 2017.
- "FRANCO SEMIOLI LE PARTITE DISPUTATE CON LA MAGLIA DELL'ITALIA" (in Italian). Italia1910.com. Retrieved 20 January 2017.
- "Non va la nuova Italia di Donadoni La Croazia è più avanti: 0-2 a Livorno" (in Italian). La Repubblica. 16 August 2006. Retrieved 20 January 2017.
- Menicucci, Paolo (18 March 2007). "Uncapped duo handed Italy chance". UEFA.com. Retrieved 13 May 2010.
- "Semioli, Franco" (in Italian). FIGC. Retrieved 20 January 2017.