About This Fund
Lightspeed Venture Partners Fund XV-B is a $1.2 billion early-to-mid-stage venture capital fund closed in December 2025 as the companion vehicle to Fund XV-A, together forming the core early-stage component of Lightspeed's record $9 billion multi-fund close. While XV-A targets seed and early Series A investments, Fund XV-B is designed for larger Series A rounds and selective Series B opportunities — enabling Lightspeed to maintain ownership concentration and support portfolio companies through their critical scaling phases. Both XV funds share the same investment philosophy and LP base, reflecting the firm's commitment to multi-stage continuity from company formation through growth equity.
Fund XV-B leverages Lightspeed's unmatched AI expertise and global platform capabilities. With over $5.5 billion deployed into 165 AI-native companies and founding investments in category leaders such as Anthropic, xAI, Databricks, Mistral, Glean, and Abridge, the fund is positioned to support the next generation of AI companies as they scale through their Series A and Series B milestones. The fund operates across Lightspeed's 14 global offices, providing localized investment expertise, board-level support, and access to a curated network of more than 1,000 portfolio companies for customer introductions, talent recruitment, and strategic partnerships across sectors.
Lightspeed's portfolio construction is informed by a 25-year track record: 39 IPOs and 262 acquisitions, including Rubrik (2024 IPO), Affirm ($30B+ IPO valuation), and Navan and Netskope achieving multi-billion-dollar outcomes. The firm has returned more than $8 billion to limited partners in recent years, reflecting strong DPI alongside still-unrealized gains in growth-stage holdings. Fund XV-B, as the larger of the two XV vehicles, will deploy capital into companies in enterprise software, artificial intelligence, fintech, consumer, and healthcare that are demonstrating product-market fit and early revenue traction at Series A and B scale.