Anti-Dilution Clauses Explained: Full-Ratchet vs Weighted Average (India)

An anti-dilution clause protects an investor if the company later raises money at a lower price than the investor paid, a "down round." It adjusts the investor's conversion ratio so each preference share converts into more equity shares, softening the hit to the investor's ownership and effective price. Two structures do this very differently: full ratchet resets the investor's price straight to the new, lower round price, no matter how small that round was; weighted average blends the old and new prices using the size of both rounds, and is the market standard. The one thing most people get wrong: they assume anti-dilution protects the company or founders from dilution generally. It does not. It protects one investor class from one event, a future down round, by giving that class more shares, which dilutes everyone else, founders and ESOP holders included, harder. This guide (published by Adira, which makes contract review and CLM software, so we have a commercial stake in you understanding this well, but the explainer stands on its own) walks through the mechanics, the formula, the Indian statutory wrapper, and what to check before you sign.

Plain meaning

Anti-dilution is written into the rights of an investor's Compulsorily Convertible Preference Shares (CCPS), the instrument almost all Indian VC and PE rounds use. Each CCPS has a conversion price (usually the price paid, the "Original Issue Price" or OIP) and a conversion ratio (how many equity shares one CCPS becomes, usually 1:1 at issue). If the company later issues shares below that OIP, the clause reduces the conversion price and raises the ratio for the existing investor's CCPS. Nothing happens immediately, no new cash, no new shares issued on the spot. Only when the CCPS actually converts, at a later round, an IPO, or an exit, does the investor get more equity shares than the original ratio promised.

This differs from a pre-emptive right, which lets an investor buy more shares to hold their percentage. Anti-dilution needs no fresh investment; it is a formula-driven adjustment to an instrument already held.

Who it protects and what triggers it

Anti-dilution protects the class it is written for, almost always the CCPS holders of a given round, and does nothing for equity shareholders, meaning founders and ESOP holders. The trigger is narrow: an issuance of new equity instruments at a price below the protected investor's own conversion price. A flat or up round does not trigger it at all.

Because the trigger is mechanical, price alone, it does not ask whether the down round was the company's fault, a market downturn, or a bridge round priced low to raise cash fast. Any of these fire the same formula, unless the clause carves specific issuances out.

What to look for

Four mechanics decide how harsh an anti-dilution clause is, and none show up in the clause's headline promise:

1. Full ratchet or weighted average. Full ratchet resets the conversion price straight to the new round's price, however small that round was. Weighted average blends old and new prices, scaled by how many shares were issued at each, so a small down round produces a small adjustment. Weighted average, specifically broad-based, is the Indian market standard; full ratchet is rare outside distressed or bridge financings.
2. Broad-based or narrow-based. The formula below uses a variable for shares outstanding before the down round. Broad-based counts every fully diluted share, including the ESOP pool and convertible notes as-converted. Narrow-based excludes the option pool. A smaller base produces a bigger adjustment for the same down round.
3. Carve-outs. A good clause excludes specific issuances from ever triggering it: ESOP shares (up to a stated pool size), shares from conversion of existing CCPS or exercise of warrants, bonus shares, and approved M&A issuances. Miss the ESOP carve-out and every option grant, usually priced near face value, technically becomes a dilutive issuance.
4. Pay-to-play. Some SHAs make protection conditional on the investor participating pro-rata in the down round; sitting it out forfeits the adjustment, sometimes forcing conversion of that investor's CCPS to equity.

A quick test: Ctrl+F the clause for "ratchet." If it appears with no reference to "weighted average," and the new price is simply "the price per share of the Subsequent Financing," that is full ratchet. Then check whether "ESOP" appears in the excluded-issuance list. If not, flag it.

The weighted-average formula, worked

The standard broad-based weighted-average formula in Indian SHAs, borrowed from NVCA-style US precedent, is:

NCP = CP1 x (A + B) / (A + C)

NCP is the new conversion price, CP1 the conversion price before the down round, A the fully diluted shares outstanding before the down round (including the full ESOP pool), B the shares the new round's consideration would have bought at CP1, and C the shares actually issued in the down round.

Worked example. A Series A investor holds CCPS with a conversion price of Rs 100, converting 1:1. Before a Series B down round, the company has 1,00,00,000 fully diluted shares (A). Series B issues 20,00,000 new shares at Rs 60 each, for Rs 12,00,00,000 in total. B (consideration at the old price) is 12,00,000. C (shares actually issued) is 20,00,000.

NCP = 100 x (1,00,00,000 + 12,00,000) / (1,00,00,000 + 20,00,000) = 100 x 1,12,00,000 / 1,20,00,000 = Rs 93.33

The conversion price drops from Rs 100 to about Rs 93.33, so each CCPS now converts into about 1.0715 equity shares instead of 1, roughly a 7% bump. Under full ratchet on the same facts, the new conversion price becomes Rs 60 flat, the exact Series B price, and each CCPS converts into 100/60, about 1.667 shares, a 67% jump. The size of the down round barely matters under full ratchet; under weighted average, it is central.

The Indian position: CCPS mechanics and the FEMA conversion-price floor

India has no standalone statute called "anti-dilution." It is built from two layers: the Companies Act mechanics that let a CCPS carry a bespoke conversion formula (Section 43 of the Companies Act, 2013, read with the private-company exemption route covered in our liquidation preference guide), and, where the protected investor is a non-resident, the FEMA pricing guidelines that constrain how low that conversion price can go.

Rule 21 of the Foreign Exchange Management (Non-Debt Instruments) Rules, 2019, requires an unlisted Indian company issuing equity instruments to a person resident outside India to price them at:

"the valuation of equity instruments done as per any internationally accepted pricing methodology for valuation on an arm's length basis duly certified by a Chartered Accountant or a Merchant Banker registered with the Securities and Exchange Board of India or a practising Cost Accountant, in case of an unlisted Indian Company." Source: Rule 21, FEMA (Non-Debt Instruments) Rules, 2019

That governs the original issue price. The harder question for anti-dilution is what happens at conversion, later, once the ratio has been adjusted. RBI's Master Direction on Foreign Investment in India, which operationalises the NDI Rules, states the governing principle for convertible instruments held by non-residents: the price or conversion formula must be fixed upfront at issue, and the price actually applied at conversion cannot fall below the fair value certified at issuance, without any assured return built in. Source: RBI Master Direction on Foreign Investment in India, FED Master Direction No. 11/2017-18

So an anti-dilution clause for a foreign CCPS holder has to work as an adjustment to a formula agreed at issue, not as a fresh, renegotiated price floor that could read as an assured, guaranteed return disconnected from the company's actual value. A mechanical, broad-based weighted-average adjustment, calculated off the down round's actual terms, sits comfortably inside this framework because it was fixed upfront. A clause letting investor and company simply agree a new, lower conversion price after the fact, untethered to a formula, risks being read as the kind of assured return FEMA pricing guidelines exist to prevent.

Separately, the down round price itself has its own domestic pricing rule. Under Section 62(1)(c) of the Companies Act, 2013, a private placement or preferential issue needs a special resolution, and Rule 13(2)(g) of the Companies (Share Capital and Debentures) Rules, 2014 requires the price be "determined on the basis of valuation report of a registered valuer." So the very event that triggers anti-dilution is itself gated by a mandatory independent valuation.

A named case: NTT Docomo v Tata Sons

No reported Indian judgment litigates an anti-dilution ratchet directly, since these clauses are formula-driven and rarely reach court alone. But the underlying tension, a contractually pre-fixed price for a CCPS-linked instrument colliding with FEMA's pricing guidelines, was tested in NTT Docomo Inc v Tata Sons Ltd, Delhi High Court, O.M.P. (EFA) (COMM.) 7/2016, decided 28 April 2017.

Docomo and Tata had agreed, in their 2009 shareholders' agreement, that if Tata Teleservices missed performance targets, Docomo could require Tata to find a buyer for Docomo's shares at 50% of Docomo's purchase price. The targets were missed, no buyer emerged, and an LCIA tribunal awarded Docomo roughly USD 1.17 billion in damages. Tata resisted enforcement in Delhi, arguing that paying out at that pre-agreed price would breach FEMA's pricing guidelines. The Delhi High Court enforced the award, holding the sum was payable as damages for breach of contract, not as share consideration governed by FEMA pricing rules, and that RBI had no standing to object to enforcement of a foreign arbitral award between private parties. See the judgment on Indian Kanoon.

The drafting lesson: a clause that reads as a pre-fixed, assured minimum price for a foreign CCPS holder, rather than a mechanical formula responding to an actual, independently valued down round, sits in the zone FEMA pricing guidelines police, and that Tata-Docomo shows RBI takes seriously. Weighted-average anti-dilution off a valuer-priced round is formula, not an assured return.

Red flags

Normal	Red flag	Why it matters
Broad-based weighted average, using the NCP formula above	Full-ratchet anti-dilution, conversion price resets to the new round's price	A tiny bridge round at a low price can reset the entire conversion price, causing dilution to founders and ESOP far beyond what the down round itself justifies
ESOP pool issuances (up to the stated pool size) explicitly carved out	No ESOP carve-out in the excluded-issuance list	Every option grant, priced near face value, can technically trigger the ratchet, for no real down round at all
Bonus shares, conversions of existing convertibles, and approved M&A issuances also carved out	Only ESOP is carved out, or no carve-outs at all	A narrow list still lets routine corporate actions accidentally trigger adjustments
Broad-based denominator (A), the full fully diluted cap table	Narrow-based denominator, excluding the ESOP pool or convertible notes	A smaller base produces a bigger adjustment for an identical down round, quietly making the clause harsher
Formula fixed upfront in the SHA, applied mechanically to the down round's valuer-certified price	Clause allows a negotiated, discretionary new conversion price, no fixed formula	Departs from the "fixed upfront" principle FEMA pricing guidance expects for non-resident holders, risking an assured-return characterisation
Pay-to-play condition requiring pro-rata participation to keep protection	No pay-to-play; investor gets full benefit while sitting out the round entirely	Removes any check on investors wanting the upside of protection without funding the company when it needs cash most
Each round's anti-dilution rights independently scoped and dated	Rights stack silently across rounds with no coordination clause	Series A, B and C investors can each claim adjustments off different triggers, compounding dilution to common shareholders

Bad clause -> better clause

Bad: "In the event the Company issues any Equity Shares at a price per share lower than the Series A Conversion Price then in effect, the Series A Conversion Price shall be immediately reduced to equal the price per share of such issuance, and the Series A CCPS shall be adjusted accordingly, provided that this Clause shall not apply to shares issued pursuant to the Company's Employee Stock Option Plan."

What is wrong: this is full ratchet, it has only one carve-out and misses bonus shares and conversions of existing instruments, and it fixes no formula upfront, leaving room for a discretionary adjustment.

Better: "In the event the Company issues New Securities at a price per share lower than the Series A Conversion Price then in effect ('Dilutive Issuance'), other than an Excluded Issuance, the Series A Conversion Price shall be adjusted using the formula NCP = CP1 x (A+B) / (A+C), where CP1 is the Series A Conversion Price immediately before the Dilutive Issuance, A is the fully diluted share capital of the Company immediately before the Dilutive Issuance (including the full approved ESOP pool), B is the number of shares the aggregate consideration for the Dilutive Issuance would have purchased at CP1, and C is the number of shares actually issued in the Dilutive Issuance. 'Excluded Issuance' means shares issued under an ESOP approved by the Board and shareholders (up to [X]% of fully diluted capital), bonus shares, shares issued on conversion or exercise of securities outstanding as of the date of this Agreement, and issuances approved in writing by a majority of the Series A CCPS holders."

What changed and why: full ratchet became broad-based weighted average with the actual formula stated, the carve-out list widened to cover issuances that are not real down rounds, and the adjustment is now mechanical and fixed upfront rather than discretionary.

How it interacts with related clauses

• Liquidation preference. Anti-dilution changes the conversion ratio used in the "greater of preference or as-converted" comparison that decides an exit payout. See our guide on liquidation preference in India.
• Vesting. A down round often coincides with founder or key-employee departures. Reverse vesting decides how much of the diluted common pool a departing co-founder keeps once anti-dilution has already reduced that pool's share. See our guide on founder and employee vesting in India.
• Pre-emptive rights and ROFR. Pay-to-play provisions inside anti-dilution clauses usually cross-reference the same pre-emptive rights clause that governs who gets first offer on new shares in the down round itself.

You can mark up how your anti-dilution, liquidation preference, and vesting clauses interact directly on a term sheet or SHA, for free, using Weave, before you send it back with comments.

US and global contrast

The vocabulary, full ratchet versus weighted average, broad-based versus narrow-based, is identical in the US, where Indian term sheets borrowed the structure directly. Full ratchet shows up more often in the US than in India, mainly in seed or bridge rounds and genuinely distressed financings, where investors have the most leverage to demand it. The structural difference is regulatory, not contractual. A US adjustment on Delaware preferred stock answers only to the certificate of incorporation and Delaware corporate law; there is no cross-border pricing floor equivalent to FEMA. An Indian clause protecting a foreign investor has to clear that extra layer, the formula has to be fixed upfront and the eventual conversion price cannot fall below the fair value certified at issuance, which is why formula-based, broad-based weighted average sits on firmer ground in India than a discretionary, renegotiated ratchet does.

FAQ

What is the difference between full ratchet and weighted average anti-dilution? Full ratchet resets the investor's conversion price straight to the new, lower round price, regardless of how many shares that round issued. Weighted average blends the old and new prices using a formula that accounts for the size of the down round relative to the company's existing capital, producing a smaller adjustment. Weighted average, specifically broad-based, is the market standard in India; full ratchet is a red flag outside distressed financings.

Does anti-dilution mean the investor gets new shares issued to them right away? No. It adjusts the conversion price and ratio of CCPS already held. The investor receives more equity shares than originally promised only when the CCPS actually converts, at a later round, an IPO, or an exit.

Why does the ESOP pool matter to anti-dilution? Options are usually granted near face value, far below the CCPS conversion price. If ESOP issuances are not carved out, ordinary option grants can technically count as a dilutive issuance and trigger an adjustment that was never meant to apply to routine employee equity.

Can a foreign investor's anti-dilution clause conflict with FEMA? It can, if drafted as a discretionary, renegotiated price rather than a formula fixed upfront at issuance. RBI's Master Direction expects the conversion formula for non-resident holders to be fixed at issue, with the conversion price never falling below the fair value certified then. A mechanical, broad-based weighted-average formula applied to an actual, valuer-priced down round fits this. A negotiated floor price detached from a formula risks being read as an assured return, the issue at the heart of the Tata-Docomo dispute.

What is pay-to-play and why does it matter? A pay-to-play condition says an investor keeps their anti-dilution protection for a round only if they participate pro-rata in that round. Without it, an investor can sit out a down round entirely and still claim the full benefit of the adjusted conversion ratio, which many founders and other investors consider unfair when the company needed fresh capital most.

Can anti-dilution rights from multiple rounds stack? Yes, unless the SHA coordinates them. Series A, B, and C investors can each hold independent anti-dilution rights triggering off different events, and a single down round can trigger adjustments for several classes at once, compounding dilution to founders and ESOP holders beyond what any single class's clause looks like in isolation.

This guide gets you to understanding what an anti-dilution clause does, the difference between full ratchet and weighted average, and where FEMA pricing guidelines constrain how it can be drafted for a foreign investor. It does not tell you whether a specific formula, carve-out list, or pay-to-play condition in your own term sheet or SHA is a fair deal for your round, that depends on your negotiating leverage, comparable deals, and facts a lawyer needs to see. Talk to a lawyer before you sign a term sheet or SHA containing an anti-dilution clause.