Canada’s Premium Audience Exchange  (CPAX), is now four members larger, with the announcement that Postmedia, Yellow Pages, the Chronicle Herald and DHX Television are all adding inventory to the service.

The addition of inventory from those four partners brings the total number of sites on the exchange to over 100.

CPAX, which is powered by Index Exchange, also includes  English and French inventory from media companies such as CBC/Radio-Canada, Rogers Media and Shaw Media.

Late last year in an effort to increase transparency in its system, Index Exchange publicized the list of agencies and DSPs that CPAX works with.

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