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Here’s what you need to know today in startup and venture news, updated by the Crunchbase News staff throughout the day to keep you in the know.

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Database company Couchbase said to file confidentially for IPO

Santa Clara, California-based , developer of a distributed NoSQL cloud database, has filed confidentially for an initial public offering, according to a Reuters citing unnamed sources.

The offering reportedly could set a value of up to $3 billion for the 12-year-old company. Previously, Couchbase raised $251 million in known funding, per Crunchbase data, from and other well-known venture and strategic backers.

The company is reportedly generating revenue in excess of $100 million annually, a common threshold for companies eyeing public markets.

— Joanna Glasner

Funding rounds

Skeleton Technologies raises $61M: Estonian energy storage startup has ($61 million) to boost the production of its ultracapacitors. Funding came from Germany鈥檚 Federal Ministry for Economic Affairs and Energy, and the Free State of Saxony, where Skeleton operates a factory.

— Joanna Glasner

Assembled lands $16.6M for work management platform: , a San Francisco-based startup developing a work management platform for customer support teams, in a Series A round led by 1.

—听听Joanna Glasner

M&A

CELLINK buys MatTek: Less than a month after acquiring Finland-based robotics and diagnostic automation company, Swedish biotech, a developer of 鈥渂ioinks鈥� targeted for use in printing tissues, is buying another company, this time Ashland, Massachusetts-based , a provider of advanced in vitro technology for clinical and tissue model innovation, cell isolation and cell culture, for $68 million in cash and stock.

— Joanna Glasner and Christine Hall

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