Whole Foods has invested a reported $36m in strategic partner Instacart at a $2bn valuation, taking its overall venture funding to more than $310m.

Upscale grocery chain Whole Foods made a strategic investment in US-based shopping service provider Instacart earlier this year, Bloomberg has reported, citing people familiar with the transaction.

Private stock market operator Equidate placed the size of the total equity authorisation at about $36m based on a regulatory filing. The capital will be added to the $220m in series C funding Instacart closed in January 2015, and was invested at the same $2bn valuation.

Instacart operates a service enabling users…