Keio’s synthetic silk producer increased its valuation to over $1.2bn in a round led by Carlyle Japan Partners.

Spiber, a Japan-based synthetic biomaterial developer spun out of Keio University, raked in ¥34.4bn ($312m) in funding led by private equity firm Carlyle’s fund Carlyle Japan Partners yesterday. Fidelity, Cool Japan Fund and Baillie Gifford also participated. The round valued the spinout at more than $1.2bn post-money. Founded in 2007, Spiber produces synthetic silk and…

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