About 403

403 connects capital, companies, and private and public institutions with opportunities we believe in. We focus on complex AI development, infrastructure, and defense. Progress in these fields depends on the right relationships and a clear entry angle. Our work spans limited partner and growth investor relationships, strategic partnerships, and government and political relations. We believe access matters when it moves the world forward and helps build a future we are excited about.

Meaning 403

403 is the web’s code for “Forbidden.” We take it as a challenge: understand what stands in the way, build trust, and open the right doors.

Leadership

403 is led by Anna Daftari and Paul Tosetti.