More details about former Sequoia venture partner Yinglan Tan’s new fund have emerged after an SEC filing confirmed that it has raised $25 million for its maiden fund, and it made its first investment.

Tan, who was with Sequoia’s Singapore office for five years in a role supporting operations before leaving this summer, is thought to be starting Insignia Venture Partners to focus on Southeast Asia’s fast-emerging startup scene.

The fund has already been uncorked and made its first deal, leading a $4 million investment in Indonesia-based co-working startup Ev Hive, a source close to negotiations told TechCrunch.

Tan did not respond to requests for comment.

There isn’t a tonne of detail in the filing — which was first spotted by Deal Street Asia — but it looks like Tan has teamed up with fellow Singaporean Lin-Hong Wong to start the new venture. Wong, who has spent time at Singaporean sovereign fund Temasek and the Singapore Economic Development Board, is listed as a director of Insignia Venture Partners within the filing. Wong currently operates a VC fund management agency called Wingz Capital,…