a16z elevates Matt Bornstein and Alex Immerman to General Partner

Andreessen Horowitz (a16z) has promoted two senior investors — Matt Bornstein and Alex Immerman — to General Partner roles, a move that cements the firm’s push into AI/data infrastructure and growth-stage technology. The appointments come as the firm continues to deploy capital from its sizable Growth vehicle and expand its infrastructure investing bench.

Matt Bornstein joins the GP ranks after more than six years at the firm, where he helped shape the infrastructure team’s focus on AI/ML and data systems. A former founder and CTO by background, Bornstein led or played a central role in investments such as Tabular (an exit to Databricks), Cursor, Mistral, Hex, Tecton (acquired by Databricks), Coactive, Replicate (acquired by Cloudflare) and others. He has also authored widely read essays on modern data architectures that helped shape the firm’s thesis.

Alex Immerman is elevated on the Growth investing team after seven years with the group. Immerman has led investments across consumer internet, B2B software, fintech and crypto, and recently spearheaded new rounds in companies such as Kalshi, EliseAI and Revolut. Colleagues describe him as a high-energy operator who combines tactical deal instincts with long-term strategic thinking on product-market fit and retention.

The promotions are notable in context: a16z recently closed a $6.75B Growth fund and now manages over $22B across five Growth vehicles. That firepower lets the firm support companies from late product-market-fit stages through IPO, and the internal promotions signal a commitment to deepen expertise in AI infrastructure and growth-stage support.

From a market perspective, the appointments reflect broader investor competition for AI-native teams and infrastructure plays. VCs are increasingly authorising larger, specialist teams to underwrite capital-intensive roadmaps for model development, data platforms and production-grade tooling. By promoting investors with proven track records in both early diligence and scaling, Andreessen Horowitz (a16z) is positioning itself to cover more rounds and provide sustained operational support.

Beyond portfolio moves, the changes matter for founders and LPs. Internal promotions typically increase continuity for portfolio companies — the same investor relationships and institutional knowledge stay in place as check sizes grow. For LPs, promoting in-house deal leaders signals a stable leadership pipeline and a governance approach that rewards execution.

Both promoted partners bring technical and operator fluency: Bornstein’s prior CTO experience and academic background complement Immerman’s cross-sector growth playbook. The firm says they will continue leading investments in their respective domains while taking on broader GP responsibilities. For a16z the message is clear: double down on AI/data infrastructure and growth-stage backing, with experienced investors now at the GP level to steer those efforts.