The 50-year-old Western-backed president's business empire ranges from chocolates to media holdings that still remain under his control.
Today's independent Novoye Vremya weekly showed the Ukrainian leader -- often criticised for failing to curb the political powers of fellow tycoons -- ranked as the country's sixth-richest man.
His assets reportedly rose by 20 per cent to USD 979 million -- barely supporting his claim of no longer being a billionaire.
Poroshenko retains control of a top TV channel and has failed to follow through on his promise to sell off his Roshen chocolate empire due to a lack of foreign interest and a dearth of rich-enough investors in Ukraine itself.
"Poroshenko's (wealth) rose thanks to the rise in value of his candy business that -- even in the midst of the deepest of crises -- is developing quickly, building new capacities and conquering new markets," the weekly said.
The wealth list is topped by the nationally renowned metals magnate Rinat Akhmetov
The 49-year-old is a controversial figure accused by some Ukrainian media of impeding Poroshenko's efforts to halt the 18-month war in the pro-Russian east.
Novoye Vremya said Akhmetov's fortunes had plunged by 56 per cent to USD 4.5 billion due in a part to the sharp recent fall in global commodity prices.
The 52-year-old grey-bearded and fiercely outspoken figure finds himself in the peculiar position of being at odds with both Kiev and Moscow.
Russia's state media accuse him of funding Ukrainian neo-Nazi combat units that commit grave crimes in the separatist east.