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The 91-year-old entrepreneur and freedom fighter built one of the largest industrial conglomerates of the country.
He was born on August 12 in 1930 in Assam in undivided India and migrated to present-day Bangladesh with his family during the partition.
Sikder set up a large number of business ventures in education, health, housing, tourism and employed about 20,000 people in the last seven decades.
Also, he was the chairman and founder of National Bank. Sikder extended support to many leading entrepreneurs of the country during their initial days of establishing businesses.
He built schools, colleges and hospitals, too.
Sikder had been with Father of the Nation Bangabandhu Sheikh Mujibur Rahman as one of his close and trustworthy associates since 1945.
He arranged a Qulkhawani for Bangabandhu and his family members on August 19 in 1975 – four days after their brutal murder – at Dhaka's Rayerbazar.
For that, he had to face harassment and intimidation of the military intelligence and land in jail.
Sikder left the comfort of sleeping on the cot and started sleeping on the floor out of the love for his "Mujib Bhai" – following the death of Bangabandhu and continued the practice until the trial of the brutal murder began.