Siena Capital

The General Partners — Rain Tamm, Rando Rannus, and Lauri Isotamm — share investment responsibilities. The three have worked together for over 25 years across corporate finance, tech-enabled investments, and startup exits. The firm does not publicly designate a single Chief Investment Officer.

Siena sources transactions directly from founders and early employees of late-stage European startups. The firm relies on its team's personal networks built over decades in the regional tech ecosystem and its public positioning as the first Baltic-dedicated VC secondary fund to generate inbound liquidity requests.

Siena targets growth-stage and pre-IPO technology companies primarily across Northern and Eastern Europe. Confirmed portfolio companies include Bolt, Veriff, Starship Technologies, and Oura — all businesses that raised significant primary venture funding before Siena purchased secondary shares.

Siena's stated strategy is focused on direct secondary transactions — purchasing existing shares from individual stakeholders in venture-backed companies. The firm does not list primary venture round investments or commitments to third-party venture capital funds as part of its disclosed activities.

Siena has not publicly described a formal co-investment program alongside external general partners. Its model as a direct secondary buyer dealing with individual shareholders naturally positions most transactions as bilateral, though the firm may occasionally transact where other secondary buyers are present.