Anti-Dilution Provisions (Full Ratchet and Weighted Average)
ANTI-DILUTION PROVISIONS
Drafting Guide: Full Ratchet vs. Broad-Based / Narrow-Based Weighted Average
1. OVERVIEW
These provisions adjust the Conversion Price of Preferred Stock when the Company issues new securities at a price below the then-current Conversion Price (a "Dilutive Issuance"). The adjusted Conversion Price changes the number of Common shares issuable upon conversion according to the series' Original Issue Price and conversion formula. The selected provision must be included in the governing charter or other enforceable stock terms under applicable corporate law.
Two principal approaches:
| Approach | Description |
|---|---|
| Full Ratchet | Conversion price is reduced to the new (lower) issue price |
| Broad-Based Weighted Average | Conversion price is reduced using a formula that weights existing and new shares |
| Narrow-Based Weighted Average | Same formula with a narrower defined share base, causing more adjustment |
2. FULL RATCHET (CHARTER PROVISION)
(For inclusion in the Certificate of Incorporation as a Section of the Preferred Stock terms)
Section [___]: Adjustments to the Conversion Price — Full Ratchet
(a) Full Ratchet Adjustment. If the Company issues any Additional Shares of Common Stock (as defined below) for a consideration per share less than the Conversion Price of the [Series ___ Preferred Stock] in effect immediately prior to such issuance, then the Conversion Price of the Series [___] Preferred Stock shall be reduced to a price equal to the consideration per share received by the Company for the Additional Shares of Common Stock so issued.
(b) Formula. For each Dilutive Issuance:
NEW CONVERSION PRICE = New Issuance Price per share
(c) Illustrative Example. If the Series [___] Preferred Stock has an Original Issue Price and current Conversion Price of $10.00 and the Company issues additional shares at $4.00, then the Conversion Price is reduced to $4.00, causing each share of Preferred Stock to convert into 2.5 shares of Common Stock instead of 1.0 share under a conversion ratio of Original Issue Price divided by Conversion Price.
3. BROAD-BASED WEIGHTED AVERAGE (CHARTER PROVISION — DEFAULT)
(For inclusion in the Certificate of Incorporation; this is the market-standard formulation)
Section [___]: Adjustments to the Conversion Price — Broad-Based Weighted Average
(a) Broad-Based Weighted Average Adjustment. If the Company issues Additional Shares of Common Stock for consideration per share less than the Conversion Price of the Series [___] Preferred Stock in effect immediately prior to such issuance, then the Conversion Price of the Series [___] Preferred Stock shall be adjusted to equal the price determined by the following formula:
NCP = OCP × [(A + B) / (A + C)]
where:
| Variable | Meaning |
|---|---|
| NCP | New Conversion Price |
| OCP | Old Conversion Price immediately before the Dilutive Issuance |
| A | Common Stock Deemed Outstanding (broad base — see definition below) |
| B | The number of shares of Common Stock that would have been issued if the Additional Shares of Common Stock had been issued at the OCP (i.e., aggregate consideration received ÷ OCP) |
| C | The actual number of Additional Shares of Common Stock issued |
(b) Common Stock Deemed Outstanding — Broad Base. "Common Stock Deemed Outstanding" immediately before a Dilutive Issuance means the sum of the following, without double counting:
☐ All shares of Common Stock issued and outstanding;
☐ All shares of Common Stock issuable upon conversion of all outstanding Preferred Stock (on an as-converted basis);
☐ All shares of Common Stock issuable upon exercise of outstanding options, warrants, and convertible securities;
☐ All shares of Common Stock reserved and available for issuance under any equity incentive plan.
(c) Illustrative Example. Assume:
- OCP = $10.00
- A = 10,000,000 shares (broad base)
- New issuance = 1,000,000 shares at $4.00 per share, so aggregate consideration = $4,000,000
- B = $4,000,000 ÷ $10.00 = 400,000 shares
- C = 1,000,000 shares
- NCP = $10.00 × [(10,000,000 + 400,000) / (10,000,000 + 1,000,000)] = $10.00 × (10,400,000 / 11,000,000) = $10.00 × 0.9455 ≈ $9.45
(d) Exclusions. Notwithstanding the foregoing, no adjustment shall be made for:
☐ Shares of Common Stock issued upon conversion of Preferred Stock;
☐ Shares of Common Stock issued or issuable to employees, directors, consultants, or advisors under Board-approved equity plans (up to a specified cap);
☐ Shares of Common Stock issued as a stock dividend, stock split, subdivision, combination, or similar;
☐ Shares issued in connection with a bona fide acquisition, merger, joint venture, strategic transaction, or commercial arrangement approved by the Board (including consent of the Preferred Stock directors, if required);
☐ Shares issued in connection with equipment leases, commercial lending, or banking transactions, upon Board approval;
☐ Shares issued in an IPO.
Include the selected exclusions in whichever charter variant is adopted, including the full-ratchet variant if selected.
4. NARROW-BASED WEIGHTED AVERAGE (CHARTER PROVISION — INVESTOR-FAVORABLE)
(Formula identical to Broad-Based except the definition of "Common Stock Deemed Outstanding")
Section [___]: Adjustments to the Conversion Price — Narrow-Based Weighted Average
The formula is identical to Section 3(a) above (Broad-Based Weighted Average). However, the definition of "Common Stock Deemed Outstanding" is narrower:
"Common Stock Deemed Outstanding" means only:
☐ The shares of Common Stock issuable upon conversion of the specific series of Preferred Stock for which the adjustment is being made (on an as-converted basis); AND
☐ The shares of Common Stock issued and outstanding as of the date of determination.
(It excludes unissued/unvested options, convertible securities, and unissued shares under the equity plan.)
A narrower base yields a lower "A" in the formula, producing a greater downward adjustment to the Conversion Price (more dilution protection for the Preferred).
5. ADDITIONAL PROVISIONS (COMMON TO ALL VARIANTS)
5.1 Deemed Issuances of Options and Convertible Securities
"Additional Shares of Common Stock" means Common Stock issued after the Series [___] Original Issue Date, plus shares deemed issued under this Section 5.1, excluding the issuances expressly incorporated into the adopted provision from Section 3(d). If the Company issues Options or Convertible Securities after that date, and the total consideration payable for issue and exercise or conversion divided by the maximum number of underlying Common shares is less than the Conversion Price then in effect, the underlying shares shall be treated as issued at that effective per-share price. Record the consideration, maximum shares, and computation in the Certificate of Adjustment. Actual issuance of shares already counted under this paragraph shall not trigger a second adjustment for the same shares.
- If the underlying Option or Convertible Security is later canceled, forfeited, or expires unexercised, the Conversion Price shall be readjusted as if such issuance had not occurred (to the extent applicable).
5.2 Certain Issuances for Non-Cash Consideration
If Additional Shares of Common Stock are issued for consideration other than cash, the aggregate fair market value of that consideration as determined in good faith by the Board (with approval of at least [one] Preferred Director, if the governing charter requires it), divided by the number of shares issued, shall be the consideration per share.
5.3 Stock Splits, Combinations, Reorganizations
Upon any stock split, stock dividend, combination, reclassification, or recapitalization, the Conversion Price and number of shares issuable shall be proportionately adjusted to prevent dilution or enlargement of rights.
5.4 Notice of Adjustment
Upon any adjustment to the Conversion Price, the Company shall promptly deliver to each holder of Preferred Stock a Certificate of Adjustment signed by an officer of the Company, setting forth in reasonable detail:
☐ The event requiring adjustment;
☐ The amount of the adjustment;
☐ The Conversion Price before and after the adjustment;
☐ The relevant calculations.
5.5 No Impairment
The Company shall not, by amendment of its Certificate of Incorporation or any reorganization, transfer of assets, consolidation, merger, dissolution, issue, or sale of securities, avoid or seek to avoid the observance or performance of any term of the anti-dilution provisions, but shall at all times in good faith assist in carrying out the intent of such provisions.
5.6 Pay-to-Play Interaction (Only If Separately Adopted)
If the governing charter also contains a valid pay-to-play provision, a holder whose shares convert under that provision shall receive only the rights specified for the converted shares. Identify the applicable financing, participation threshold, and conversion effective time in that provision: [________________________________].
6. COMPARISON TABLE
(For negotiation/diligence only; not for inclusion in the charter)
| Criterion | Full Ratchet | Broad-Based WA | Narrow-Based WA |
|---|---|---|---|
| Impact of Dilutive Issuance | Severe (new price = down-round price) | Modest (weighted formula) | Moderate |
| Founder-Friendly? | No | Yes | Intermediate |
| Investor-Friendly? | Extremely | Moderate | More so than broad-based |
| Risk of Over-Correction | High (punitive in small down rounds) | Low | Low-Medium |
| Possible Use Case | A financing where the parties agree to a full reset | A financing where the parties agree to a broad share base | A financing where the parties agree to a narrower share base |
| Complexity | Low (simple formula) | Medium (algebraic) | Medium |
7. ILLUSTRATIVE CALCULATIONS (SAMPLE DOWN-ROUND SCENARIO)
Assumptions:
- Pre-round Cap Table (fully diluted): 10,000,000 shares Common (incl. options, convertibles, unissued plan)
- Series A outstanding: 2,000,000 shares at OCP = $5.00 per share (Series A originally issued at $5.00)
- Series B Dilutive Issuance: 2,000,000 shares at $2.50 per share (i.e., a down round)
| Formulation | Adjusted Conversion Price |
|---|---|
| Full Ratchet | $2.50 (Series A now converts 1:2) |
| Broad-Based Weighted Average | A = 10,000,000; $5.00 × [(10,000,000 + (2,000,000 × $2.50 ÷ $5.00)) / (10,000,000 + 2,000,000)] = $5.00 × (11,000,000 / 12,000,000) = $4.58 |
| Narrow-Based Weighted Average | A = only Series A as-converted plus outstanding Common (e.g., 4,000,000); $5.00 × [(4,000,000 + 1,000,000) / (4,000,000 + 2,000,000)] = $5.00 × (5,000,000 / 6,000,000) = $4.17 |
8. DRAFTING PITFALLS / NEGOTIATION POINTS
9. SOURCES AND REFERENCES
- NVCA Model Certificate of Incorporation (anti-dilution sections): https://nvca.org/model-legal-documents/
- Delaware General Corporation Law § 151 (Classes of stock): https://delcode.delaware.gov/title8/c001/sc05/
- ABA Private Target M&A Deal Points Studies (anti-dilution trends)
- "Venture Deals" by Brad Feld & Jason Mendelson (industry reference)
- Cooley GO Docs — Model Anti-Dilution Provisions: https://www.cooleygo.com/documents/
Disclaimer: This template is provided for informational purposes only and does not constitute legal advice. Anti-dilution provisions are mathematically and legally complex; drafting errors can cause material economic dilution or enrichment. Always engage qualified securities counsel to draft, review, and interpret these provisions.
About this template
- Last updated
- September 27, 2026
- Citations checked
- September 27, 2026
- Jurisdiction
- All states
- Category
- Corporate & Business
Legal authority
- 15 U.S.C. § 77d(a)(2) (Section 4(a)(2) of the Securities Act)
- 17 C.F.R. § 230.506 (Regulation D)
- 8 Del. C. § 151(e) (Delaware charter terms for convertible stock, when Delaware law applies)
Corporate documents govern how a company makes decisions, records them, and handles disputes between owners, directors, and officers. Proper corporate paperwork is what lets a business take advantage of limited liability, pass clean audits, and survive an acquisition or investor review. Skipping formalities like written resolutions and signed consents is one of the fastest ways for a business owner to lose personal asset protection.
Not legal advice
This template is provided for informational purposes. We recommend having an attorney review any legal document before signing, especially for high-value or complex matters.
Checked against the law it cites
A reviewer verified this template's legal citations against the official source on September 27, 2026.
15 U.S.C. § 77d(a)(2) (checked September 27, 2026): "transactions by an issuer not involving any public offering."
17 C.F.R. § 230.506(a) (checked September 27, 2026): "Offers and sales of securities by an issuer that satisfy the conditions in paragraph (b) or (c) of this section shall be deemed to be transactions not involving any public offering within the meaning of section 4(a)(2) of the Act."
8 Del. C. § 151(e) (checked September 27, 2026): "Any stock of any class or of any series thereof may be made convertible into, or exchangeable for, at the option of either the holder or the corporation or upon the happening of a specified event, shares of any other class or classes or any other series of the same or any other class or classes of stock of the corporation, at such price or prices or at such rate or rates of exchange and with such adjustments as shall be stated in the certificate of incorporation or in the resolution or resolutions providing for the issue of such stock adopted by the board of directors as hereinabove provided."
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