What is Series D?
Series D
Series D funding is a late-stage venture capital round raised by mature startups to fund major expansions, support acquisitions, or resolve recapitalization needs.
Why It Matters for Startups
Directly dictates the cap table and dilution structure during fundraising; understanding Series D helps founders model equity distributions when structuring rounds for late-stage corporate expansion and pre-exit capitalization.
Detailed Deep Dive
Series D funding represents a late-stage financing round for highly mature companies. It is often used to fund strategic acquisitions, expand globally, or strengthen the balance sheet ahead of an IPO. In some cases, it can be a down round to recapitalize a distressed startup.
Frequently Asked Questions
Q:What triggers a Series D round?
Startups raise Series D to capitalize on new growth opportunities, fund an acquisition, or handle a down round to extend runway.
Q:Who participates in a Series D round?
Large late-stage venture capital funds, private equity firms, investment banks, and institutional asset managers.
Quick Facts
- CategoryFunding
- Key ApplicationLate-stage corporate expansion and pre-exit capitalization
Coverage Trend12 Weeks
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Series D Media Coverage & Intelligence
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Mistral raises €3B as sovereign AI becomes big business
The French AI lab has raised €3 billion at a €21 billion valuation in a Series D round led by Samsung, Scaleup Europe, and PSG Equity.
Horizon3.ai raises $250M at $2B-plus valuation for autonomous pentesting
Autonomous security solutions startup Horizon3.ai Inc. today announced it has raised $250 million in a Series E round on a valuation of more than $2 billion to build out its sales operation and expand into Australia and Singapore. Horizon3.ai closed its Series D in June 2025 at a valuation of...
AI Infrastructure Startup Fireworks Closes $1.5B Round at $17.5B Valuation
Fireworks AI Inc., a startup that helps developers train and run artificial intelligence models, has raised $1.5 billion in funding. Atreides Management, Index Ventures and TCV jointly led the Series D round.
AI-powered Travel Agency Fora Hits Unicorn Status, Raises $60M
Travel agency Fora announced a $60 million Series D round led by Forerunner and Tactile Ventures, valuing the company at $1 billion.
Nearfield Instruments raises $380M to accelerate AI chipmaking
Nearfield Instruments B.V., which specializes in producing advanced chip manufacturing equipment, revealed today it has gotten a massive $380 million capital injection. The Dutch company's Series D round was led by Fidelity Management & Research Company and saw participation from a host of...