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Anti-Dilution

Anti-Dilution anti-dilution is a protective mechanism in investment agreements that safeguards investors from ownership dilution during subsequent financing rounds at lower valuations.

These provisions are typically embedded in preferred stock agreements to ensure investors maintain their economic interests when a company raises capital at a reduced valuation.

How Anti-Dilution Works

Anti-dilution provisions are critical contractual protections in venture capital and private equity investments. They activate during down rounds, where a company raises capital at a lower valuation than previous funding rounds, potentially reducing an investor's proportional ownership.

The two primary types of anti-dilution protection are full ratchet and weighted average. Full ratchet is more aggressive, adjusting the investor's conversion price to match the new lower price regardless of financing size. Weighted average is more nuanced, calculating adjustments based on the number of shares issued and existing share count.

These provisions fundamentally aim to compensate early investors for market volatility and reduced company valuations, ensuring their initial investment retains its relative economic value through complex financing scenarios.

Key Points

  • Protects investors from unexpected ownership dilution
  • Adjusts conversion prices during down rounds
  • Can significantly impact founders' and employees' equity stakes
  • Varies between full ratchet and weighted average approaches
  • Standard in venture capital and private equity investments

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Last Updated: May 21, 2026

Disclaimer: This content is for educational purposes. For guidance specific to your situation, consult with M&A professionals.