Weighted Average Anti-Dilution: The Balanced Shield

TL;DR: When a company raises money at a lower valuation (a "Down Round"), early investors are hurt. To protect them, contracts include Anti-Dilution protection. While the "Full Ratchet" version is a "Founder Killer," the Weighted Average version is the "Fair" alternative. It uses a mathematical formula to adjust the investor's stock price based on how much new money was raised. It protects the investor's value without "wiping out" the Founder, ensuring that the pain of a bad year is shared proportionally across the entire company.

Introduction: The "Down Round" Dilemma

In a startup, every new investment creates new shares. This is called Dilution. If the company is growing (a "Up Round"), dilution is fine because your 10% stake is now 10% of a much larger pie.

But in a Down Round (where the price per share drops), the pie is getting smaller. The early investors are losing both ownership and value.

To solve this, they demand Weighted Average Anti-Dilution.

How the "Weighted Average" Works

Unlike the "Full Ratchet" (which resets the price to the lowest possible number regardless of size), the Weighted Average uses a Proportional Formula.

The Formula Logic:

The formula looks at:

1. How much money was previously invested and at what price.
2. How much new money is being raised and at what lower price.

The Result: If the company raises $10 Million at a low price, the investor's old price gets a massive adjustment. But if the company only raises $1,000 at a low price, the adjustment is microscopic.

The investor is "compensated" by receiving a few extra shares for free, but the Founder's ownership isn't instantly vaporized.

"Broad-Based" vs. "Narrow-Based"

There are two ways to calculate the weighted average, and the difference can cost a Founder millions of dollars.

• Broad-Based (The Founder's Friend): This formula includes all shares (including stock options and warrants) in the math. Because the "pool" of shares is larger, the dilution adjustment for the investor is smaller. This is the industry standard for "fair" deals.
• Narrow-Based (The Investor's Friend): This only includes the actual common and preferred stock. Because the pool is smaller, the investor gets more "free" shares, causing more pain for the Founder.

Why it Matters: The "Alignment" Principle

Venture Capitalists prefer Weighted Average over Full Ratchet for one simple reason: Motivation.

If a VC uses a Full Ratchet and wipes out the Founder (leaving them with 1% of the company), the Founder will simply quit. Why work 80 hours a week for a company you no longer own?

By using the Weighted Average, the VC protects their investment while ensuring the Founder still has enough "Skin in the Game" (e.g., 20% or 30%) to stay motivated and try to fix the company. It turns a "Down Round" from a death sentence into a "recalibration."

Conclusion

Weighted Average Anti-Dilution is the "Diplomacy" of the term sheet. It proves that in the high-stakes world of venture capital, the most successful deals are those that balance the investor's need for protection with the Founder's need for incentive. By using a proportional mathematical formula instead of a "Ratchet" sledgehammer, the Weighted Average ensures that the company can survive a bad valuation year and still have a unified team focused on reaching the next multi-billion dollar milestone. 引导语：加权平均反稀释（Weighted Average Anti-Dilution）是条款清单中的“外交政策”。它证明了，在风险投资的高端世界中，最成功的交易是那些平衡了投资者保护需求与创始人激励需求的交易。通过使用比例数学公式而非“棘轮”大锤，加权平均确保了公司能够度过估值糟糕的一年，并且仍然拥有一支专注于实现下一个数十亿美元里程碑的统一团队。