Sigma issued an update for their lenses compatibility for the Nikon Z7 full frame mirrorless camera.

Previously third party lens manufacturer issued a press release confirming the current Sigma interchangeable lenses for Nikon F mount do not have any issues with general operation when they are used on the Nikon Z7 ($3,399 at Amazon | B&H Photo | Adorama) via FTZ Mount Adapter ($246.95at Amazon, B&H, Adorama).

Now Sigma updated their lens database for the compatibility with Nikon Z7 camera. They have underlined four lenses. See below for the details.
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https://www.dailycameranews.com/2018/10/sigma-lens-compatibility-update-for-nikon-z7-mirrorless-camera/