Square has raised $100 million in funding at a valuation of about $6 billion, according to Fortune, which attributed the news to market data source VCExperts.com

The San Francisco-based Square also issued 6.4 million in new Series E share at around $15.46 per share, compared to the $11.01 per share paid for Series D share in late 2012, Fortune reported today.

The buyers of the latest round were not identified, but Square has reportedly been seeking up to $200 million in new investment from sources such as the Government of Singapore Investment Corporation (GIC).

Fortune reported this new $100 million is mostly from GIC, adding Square has verbal commitments for the other $100 million.

As mobile card acceptance starts to become commoditized, Square has been expanding its product line to include more revenue-generating merchant services amid fresh competition from the large companies such as Amazon and Apple.

Square did not immediately respond to a request for comment.

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