Spark is owed about $26 million by the troubled Mako Networks, according to one person familiar with the situation.
Mako Networks, a network security firm based on Auckland's North Shore, was put into voluntary liquidation on August 20 by its shareholders, according to the Companies Office.
The following day, a secured creditor appointed receivers to the firm.
Spark this morning has confirmed it appointed the receivers and said it had previously provided asset finance to Mako.
Spark did not say how much it was owed but a source told the Herald the amount was close to $26 million.