Founder dilution: 12 ways to limit it in a funding round

Objective: finance growth without losing control

Each funding round redistributes equity: the founders’ stake automatically falls when investors come in. However, a well-negotiated and properly structured round can limit dilution to a “market” level (often 20–25% per early-stage round) and preserve control. Here is a practical legal and financial method for doing so.

1) Understand dilution and market norms

How is dilution calculated?

If your company is valued at €8m pre-money and you raise €2m, the post-money valuation is €10m: the new investor holds 20% (2/10). Founders and existing shareholders share the remainder (80%), in proportion to their initial holdings, adjusted for any option pools and preference shares.

Typical ranges

In practice, 20–25% dilution per seed/Series A round is common, depending on the risk profile, traction and competition for the deal. French private-equity practitioners regularly cite this range (see, in particular, France Invest and analyses by specialist firms, e.g. Billand & Messié).

2) Negotiate valuation and the amount raised

The first lever, often the most powerful, is to calibrate the amount raised and the valuation. A smaller round with a solid runway (18–24 months) can reduce immediate dilution, provided clear growth milestones are secured to justify a higher valuation next round. Work bottom-up (budget, hiring plans, unit economics) and defend a valuation consistent with the risk.

Tip: set out these parameters in the term sheet (negotiation points) to avoid an unfavourable renegotiation at signing.

3) Use the right legal tools to limit dilution

3.1 Anti-dilution clauses: types, scope and limits

• Types: full ratchet (adjusts the conversion price to the lowest subsequent issue price) and weighted average (a more balanced weighted average). Prefer a weighted average, a time limit (e.g. 18–24 months) and a trigger limited to a down round issuance.
• Carve-outs: exclude “technical” issues (BSPCE/ESOP, BSA/convertible bonds for key partners, debt instruments) from the calculation to avoid disproportionate anti-dilution effects.
• Interaction: in a SAS, make these mechanisms enforceable against everyone by including them in the articles of association (not just the shareholders’ agreement). For the mechanics and alternatives, see our article on liquidation preferences and their waterfall effects.
• Good practice: regulate the volume of discounted issues triggering the clause, and exclude liability for founders who are not at fault for a down round caused by macroeconomic conditions.

For a clear overview of contractual issues, also consult our guide to shareholders’ agreements: essential clauses.

3.2 Preferential subscription rights (DPS): preserve your stake

The DPS allows existing shareholders to subscribe first during a cash capital increase to maintain their percentage. For SAs, it is provided for by Article L.225-132 of the Code de commerce and applies to SASs by reference unless adjusted or otherwise provided for in the articles. Organise the timetable (information, exercise period, waiver procedures) and avoid a blanket removal of DPS without fair compensation.

3.3 Preference shares and protective governance

• Preference shares (ADP): structure classes (dividends, financial rights, conversion thresholds, differentiated voting rights) to create value without excessive dilution. Negotiate “founder” preference shares (e.g. enhanced voting rights on reserved matters) rather than increasing the stake given up.
• Reserved matters and vetoes: to offset financial dilution, clearly defined reserved matters protect structural decisions (future issues, disposals of key assets, strategic pivots, appointment/removal of officers). Embedding them in the SAS articles is crucial.
• BSA/BSPCE: define the option pool (see below) and, if you use BSA for partners, specify the carve-out covered by anti-dilution.

For implementation in SAS articles, our detailed recommendations are in drafting SAS articles suited to a startup.

3.4 Option pool (BSPCE/ESOP): negotiate timing and the basis

• Calculation basis: favour a post-money pool (created after the investors come in) over a pre-money pool borne solely by founders.
• Size: base your case on actual planned hires over 18–24 months (grant schedule) to avoid an oversized pool.
• Transparency: standard vesting/cliff arrangements and clear ESOP governance are market expectations and make valuation negotiations easier.

4) Non-dilutive and hybrid financing

• Non-dilutive funding: grants, repayable advances, unsecured personal business loans, innovation loans and guarantees (BPIfrance) reduce the need for equity.
• Debt/venture debt: limits dilution but adds covenants and debt servicing; calibrate it carefully against projected cash flow.
• Convertibles (OC/OCA) and BSA-AIR: defer valuation until the next round (cap/floor, discount), useful in a volatile market; watch for waterfall effects with liquidation preferences and anti-dilution clauses.

For a seed round, combine a reasonable equity amount with public support; this is the core of our guide to the legal steps in a seed round.

5) Legally secure the transaction: avoid invalidity and disputes

• Respect shareholders’ rights: fair disclosure, proper meeting notices and a vote at a general meeting (or a sole shareholder decision). Otherwise the round may be challenged (invalidity of corporate decisions: art. L.235-1 C. com.).
• Formalities: amend the articles, file with the registry, publish legal notices and complete tax formalities as applicable; see the official step-by-step guide on Service-Public Pro (SAS “capital increase” sections).
• Prospectus: if a public offer exceeds €8m over 12 months, an AMF prospectus is required (see AMF and the Prospectus Regulation EU 2017/1129).
• AML/CFT/KYC: anti-money-laundering checks on investors and financial flows (AMF standards), and GDPR compliance for collected data (e.g. cap table, KYC), overseen by CNIL.
• Operational common sense: a checklist of obligations (articles, shareholders’ agreement, registers, accounts), usefully summarised by Les Echos Solutions and professional organisations (e.g. CPME Paris).

6) Preserve control without blocking the round

• Blocking minority: in an SAS, majorities are set by the articles. If your articles require 2/3 for extraordinary decisions, a target of ~33.4% of capital/votes blocks those decisions. Set your thresholds from incorporation.
• Reserved matters: precise lists, numerical thresholds and appropriate quorum/majority requirements. Founders retain oversight without paralysing operations.
• Pre-emption, lock-up and approval clauses: avoid dilution through “dispersed” share ownership. Include them in the shareholders’ agreement and articles for enforceability.

Unsure how to structure the contracts? Our article on shareholders’ agreements details pre-emption, approval, tag/drag, etc.

7) Three quick numerical scenarios

• Scenario A: €8m pre-money / €2m raised / no added option pool → investor 20%, existing holders 80% (if founders held 60% before, they move to 48%).
• Scenario B: same assumptions + 10% pre-money option pool → the pool mainly affects existing holders; the investor stays at ~20%, founders fall to ~43–44%.
• Scenario C: same assumptions + 10% post-money pool → investor and existing holders bear the pool together, limiting the erosion of founders’ holdings (~46–47%).

8) Negotiation checklist (ready to use)

• Set an 18–24-month cash requirement and a reasonable valuation (target maximum dilution of 20–25% per early-stage round).
• Prefer time-limited weighted-average anti-dilution with carve-outs (ESOP, debt, partner BSA).
• Negotiate a post-money option pool sized to the hiring plan.
• Retain DPS (or organise exercise/waiver) to maintain your percentage.
• Structure preference shares and reserved matters to offset dilution with targeted control rights.
• Use non-dilutive financing (BPI, grants) to reduce the equity to be issued.
• Secure the formalities (extraordinary general meeting, articles, registry, AMF if > €8m/12 months, AML/CFT/KYC, GDPR).

Quick FAQ

What dilution should you target per round?

Often 20–25% in seed/Series A, depending on traction and competition. In a tight market, lower limits may be negotiated if you offer rights (preferences, governance).

Do DPS apply to an SAS?

Yes, by reference to SA rules, subject to adjustments in the articles. Never remove DPS without balanced consideration and a clear timetable.

Anti-dilution: full ratchet or weighted average?

The weighted average is more in line with market practice and avoids punitive effects. Limit it in time and include exceptions (ESOP, debt).

Can you raise funds without an AMF prospectus?

Yes, below €8m in public offers over 12 months, or if an exemption applies. Above this, a prospectus is required (AMF rules and EU Regulation 2017/1129).

How can control be preserved despite dilution?

Majority thresholds in the articles, reserved matters/vetoes, pre-emption/approval and a suitable preference-share structure.

For more on the legal aspects of fundraising, also see the legal steps in a seed round (process), our explanation of the term sheet, as well as liquidation preferences and designing SAS articles.

Legal references and useful sources: Code de commerce (invalidity: L.235-1; SA preferential subscription rights: L.225-132), AMF (prospectus > €8m), Regulation (EU) 2017/1129, Service-Public Pro (SAS formalities), CNIL (data/KYC), BPIfrance (financing), market analyses (France Invest, Billand & Messié, Les Echos Solutions, CPME Paris).