On 16 June 2015, Peñaranda signed for Serie A side Udinese, owned by Italian businessman Giampaolo Pozzo. He was then immediately loaned to Granada who at the time were also under the ownership of Pozzo. He made his debut for the La Liga side on 22 November, starting in a 2–0 home win against Athletic Bilbao. Upon making his debut he became the youngest ever player to ever represent the club. On 12 December 2015, Peñaranda scored his first goals in the top flight of Spanish football, netting a brace in a 2–1 away win against Levante UD. In doing so he became the youngest ever non-Spanish player to score a brace in La Liga, breaking the record previously held by Barcelona'sArgentine forward, Lionel Messi. On 1 February of the following year he signed a four-and-a-half-year deal with Premier League side Watford, owned by Pozzo's son Gino, but remained on loan at Granada for the remainder of the season. At the end of the season Granada were sold to Chinese firm Link International Sports, putting pay to the possibility of Peñaranda returning to the club on loan for another season. Following his arrival at Watford in July, Peñaranda was shipped back to Udinese on a season long loan deal. Watford had agreed to loan Peñaranda while they waited for him to qualify for a work permit to play in England. He made his debut for the Udinese on 13 August 2016, coming on as a second-half substitute for Ryder Matos in a 3–2 Coppa Italia loss to Spezia. His Serie A debut came the following week in a 4–0 drubbing at the hands of Roma, with Peñaranda coming on as a second-half substitute for Rodrigo De Paul. Peñaranda made his Watford first team debut against Woking in the 3rd round of the FA Cup on 6 January 2019.
On 5 January 2017, it was announced that Peñaranda had been recalled from Udinese and would spend the remainder of the season on loan with La Liga side Málaga. The deal included an option for Málaga to extend the loan by a further season.
Return to Watford
Upon his return to Watford he scored his first goal for the club in an EFL Cup tie against Coventry City on 27 August 2019.
On 2 September 2019, Adalberto Peñaranda moved to Eupen on a one-year loan.
Career statistics
Club
International
Personal life
On 18 April 2015, Peñaranda and fellow Deportivo La Guaira teammate Charlis Ortiz were both shot in an attempted robbery after attending a party. Peñaranda was struck in the left thigh with the bullet passing clean through. Ortiz, however, was struck in the rib area and had to undergo surgery the following day.