Both Umer and his younger brother Usman Dar also actively participated in PTI's 126 days sit-in in Islamabad against the PML-N government.
Usman Dar contested the 2013 and 2018 general elections as PTI candidate for Sialkot city's National Assembly constituency, but both times, Kh Asif defeated him.
Later, Prime Minister Imran Khan appointed Usman Dar as the Chairman of Prime Minister's Youth Development Programme.
Ishaq Dar and his wife also have seven accounts in different Pakistani banks besides eight in the name of their companies according to the information acquired through the State Bank of Pakistan.
Dar has been in London for a medical check-up since October 2017.
The report which was issued by the London Neurosurgery Partnership and dated April 26, stated that Dar also had cardiac issues and had to undergo an emergency stent implant in the past.
NAB has listed the properties and assets of Dar as follows: A house in Gulberg, Lahore, a two-kanal plot in Parliamentarians Enclave, Islamabad, a two-kanal plot with Ayaz Builders (Pvt) Ltd, a plot in Senate Cooperative Housing Society, Islamabad, a two kanal and 19 marla plot in the name of Mrs Tabassum Dar, three plots in Alflah Housing Society, Lahore owned by Dar, his wife and son Ali Mustafa Dar and six acres in Mouza Milot owned by him and his wife.
In the list of foreign properties and assets, the NAB mentioned a flat in Emirates Hills Dubai, owned by Dar, an apartment in Palm Jumairah Dubai, a 2003 Bentley Arnage car, a 2006 Mercedez, two sets of shares/investment in Baraq Holdings (Pvt) Ltd and shares/investments in Al-Nahayan owned by Ishaq Dar.
The list of cars in Pakistan include a 2004 Land Cruiser owned by Mrs Dar, a 1999 Land Cruiser, a 2004 Toyota Corolla, a 1998 Mercedez Benz, a 2008 Mercedez and a 2014 Land Cruiser.
NAB filed an interim reference against Dar in September last year in light of the Supreme Court's July 28, 2017, verdict in the Panama Papers case.
The three accused in the supplementary reference are identified as directors of Dar's companies and accused of opening fictitious accounts in his name.
On May 8, however, the Supreme Court, while hearing a petition against the acceptance of Dar's nomination papers, temporarily suspended Dar's Senate membership and ordered him to appear in court.