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Subscriber Only Raises $186 Million in Funding Led by TPG Capital Inc. raised $186 million in a round led by TPG Capital, in the largest single investment in an education-technology company since at least 2010.

With the financing,'s valuation is approaching $1 billion, said people with knowledge of the matter, who asked not to be identified because the number is private. Existing investors including Spectrum Equity, Accel Partners and Meritech Capital Partners also participated in the funding, said the company, which has raised more than $289 million since its inception.