The company did not indicate the impetus for the decision in its US Securities and Exchange Commission filing on July 25.

Armstrong officials also did not release any additional public comment on the move.

Armstrong and its affiliate, Armstrong Resource Partners, first filed IPO plans in October 2011.

The twin public offerings were reportedly expected to total about $91 million.

According to the St Louis Business Journal, Armstrong Energy had planned a $69 million IPO, under which it would sell shares on the NASDAQ Global Market while ARP planned its IPO for $22 million, also on NASDAQ.

The companies were formed in 2006 and 2008, respectively.

In November, the company confirmed it planned to use the money from the debt offering to repay its outstanding credit facilities, with the remainder to be earmarked for capital expenditures and potential reserve acquisitions.

Between 2006 and 2011, the Journal reported, Armstrong – which has a payroll of about 800 individuals – made $260 million obtaining coal properties.

Had the IPO come to pass, Raymond James, FBR Capital Markets and Stifel were to be joint bookrunners on the deal.

Yorktown Partners of New York is Armstrong Energy’s majority owner.