What Does a Full-Ratchet Anti-Dilution Clause Mean for Existing Owners?
Short answer. A full-ratchet clause can adjust an existing investor's conversion or share price to match a later, lower-priced financing, increasing that investor's ownership and diluting other holders. The exact effect depends on the agreement's definitions and mechanics. Model the outcome across future rounds, then have your attorney review the terms before signing.
A full-ratchet anti-dilution clause can shift ownership toward an existing investor when a company raises capital at a lower price. The name alone does not tell you exactly how much ownership changes. The agreement's definitions, share classes, conversion mechanics, and capitalization assumptions determine the result.
Understand the Adjustment
In a typical full-ratchet structure, a later financing below the original issue price resets the protected investor's conversion price to that lower price. The investor may then receive additional shares upon conversion, even if the down round is small. That can reduce the percentage held by founders and other shareholders who do not receive the same protection.
Compare the clause with other anti-dilution approaches, which may weigh the size of the new issuance as well as its price. Do not assume the label captures the full effect. Check which securities are protected, what counts as a qualifying issuance, and whether exceptions apply. Also review how the clause interacts with pre-emptive or pro-rata rights, which may let an investor contribute additional capital to maintain a position.
Model the Effect Before Agreeing
Build a capitalization table showing ownership before and after a hypothetical lower-priced round. Include the proposed financing amount, share price, outstanding options or convertible securities, and each investor's rights. Ask counsel or a finance professional to check the assumptions. A capital raise investor pipeline calculator can help organize the raise process, while a direct deal IRR and MOIC calculator can help frame how deal outcomes may affect returns.
Consider more than the immediate dilution. A strict clause may make a future round harder to negotiate if new investors expect similar protection or if the adjustment changes founder and employee ownership significantly. On the other hand, an investor may view the provision as protection against a lower valuation. The parties need to understand the trade-off in the context of the company's need for fresh capital.
Review the Full Agreement
Read the anti-dilution language alongside board rights, veto rights, transfer terms, and future financing provisions. Clarify the calculation with worked examples in the documents or negotiation materials, and ensure the final agreement reflects the parties' understanding. Harris Fried's discussion in The Single Family Office notes that an anti-dilution provision can offer some protection, while fresh capital may still be needed and some dilution should be expected.
Do not treat a term sheet summary as a substitute for the binding documents. Ask your attorney to explain the adjustment, its exceptions, and its effect on every share class. Compare the result with the company's next milestones and likely capital needs. The capital call and liquidity planner can help you think through timing and cash needs, and Step 6: Single family office governance provides context on ownership protections and decision rights.
A certain amount of dilution should be expected.
Sources: The Single Family Office. Informational only, not financial, legal or tax advice.