Discount retailer Target and grocery chain Kroger are in talks about a possible merger, tech-focused magazine Fast Company reported Friday, citing people with knowledge of the matter.

The companies first started talks last summer about a partnership that could improve Target’s grocery business and give Kroger customers more access to merchandise and e-commerce, the report said.

While the talks started once again in 2018, the two companies appear to be struggling to decide whether a merger is the best path forward, the report said.

Shares of Kroger rose 8 percent in premarket trading Friday while Target was trading up 2.8 percent.

Kroger has a market cap of $20.62 billion and Target $37.12 billion.