Alternative Networks expects adjusted EBITDA for the year ending 30 September to be somewhat below management's previous expectations.
The group said that trading has been affected by two unforeseen events: the mobile roaming tariff reset and the uncertainty caused by the EU referendum.
It says: "As the referendum is still relatively recent, the potential longer term impact on the group's future trading performance is unclear. However, the group remains in a strong financial position with recurring revenues comprising over 75% of sales, and continued robust cash generation which supports the progressive dividend policy."
Chief executive Mark Quartermaine said: "We are disappointed to have seen business uncertainty over the summer in the wake of the EU referendum impact our Advanced Solutions business, but the pick-up in new business after the summer reassures us that our business remains well positioned to benefit from long term trends. We will update the market in more detail at the time of our full year results."
At 8:02am: (LON:AN.) Alternative Networks PLC share price was -23p at 301p