1987The Parkhotel Zug opens with 84 rooms.
1990The hotel is extended to include 28 hotel rooms in the neighboring Résidence. Hotel guests are given access to the Résidence swimming pool. 
1994The hotel is taken over by the Parkhotel Zug AG – a corporation specially formed for the purpose and part of the Metall Zug Group. 
1996The conference and seminar offerings are expanded significantly with the opening of the Congress Center Metalli Zug (CCMZ). 
1998The restaurant is completely renovated. 
2003 & '04All rooms in the main hotel building are updated during general renovations. 
2005Web presence and logo are modernized. 
2007The hotel lobby and reception are renovated. At the same time, the kitchen is completely renovated. 
2010Parkhotel Zug AG is renamed Hotelbusiness Zug AG to reflect the addition of the Parkhotel’s sister hotel City Garden, the CU Restaurant, the opening of a total of 49 Serviced City Apartments on the nearby Haldenstrasse as well as the takeover of the gastronomical facilities of the Theater Casino Zug and the Restaurant Bären in Zug. 
2010The Congress Center Metalli Zug "CCMZ" will be closed due to the expansion of the sales area in the Metalli shopping mall.
2010 & '11The entire ground floor in the main building is renovated from top to bottom in order to give the hotel lobby, Living Room, reception, the banquet rooms as well as the Parkhotel Restaurant and the Smoker’s Lounge an attractive new unified appearance.
2015At the end of 2015, the TCZ lease contract will no longer be extended after 5 years of operation.
2015Remodeling and investment in the new bar, lounge & restaurant terrace wooden floor.
2017Renovating all hotel rooms and baths in the Parkhotel Zug.
2020Installation of fan coils in most rooms in the Parkhotel Zug - environmentally friendly cooling and heating with lake water using the “Circulago” connection of the city of Zug.

The Hotelbusiness Zug AG with the two 4 star superior hotels, the three apartment buildings and the restaurant Bären is the market leader in the Hotel & Restaurant Industry in the City of Zug.