Selling a startup: complete 2026 M&A legal guide

Selling a startup is a demanding M&A process where every detail matters: structure (share deal vs asset deal), timetable, due diligence, warranties, employment obligations and legal publications. Here is an actionable guide to securing your exit in France in 2026, from the first discussion to post-closing.

1) Choose the right structure: shares, assets or merger

Three structures predominate:

• Share deal (transfer of securities): the buyer acquires the shares/interests (SAS/SARL). Advantages: operational simplicity and contractual continuity. Points to watch: approval/pre-emption/shareholders’ agreement clauses, employee information/consultation (transfer of control), and extensive representations and warranties.
• Asset deal (transfer of assets or a business): selective transfer (customer base, trademark, code and selected contracts). In return, enhanced formalities: mandatory particulars in the agreement (price, origin, turnover for the last 3 financial years and statement of pledges), publications within 15 days (JAL + BODACC), creditors’ right to object within 10 days, price often held in escrow for approximately 90 days in practice, and registration duties payable within one month (Service‑Public; Parthemis Avocats; Code de commerce).
• Merger / partial asset contribution: useful for group integration (contributions under a favourable regime, universal transfer). Check competition approvals and, where applicable, the approval procedure (DJS Avocats).

Employee information/consultation on a sale

SMEs must inform employees in advance of a transfer of control or business sale, and companies with a CSE must consult it according to the statutory timetable. Non-compliance exposes the company to a civil fine of up to 2% of the price (invalidity is no longer the default sanction since the loi Macron) (Marvell Avocats; Osborne Clarke; La Retraite en Clair).

2) A 12-step M&A roadmap

1. Preparation: buyer strategy, M&A bank/lawyer, prepare your data room (contracts, IP, cap table, employment, tax and GDPR).
2. NDA — robust and mutual (definition of information, duration and non-solicitation).
3. Teaser & CIM (information memorandum) with KPIs and consistent metrics.
4. Letter of intent (LOI): price (valuation basis), structure (shares/assets), scope, exclusivity, prior matters, earn-out, locked-box vs closing accounts, conditions precedent (financing, approvals and competition) (Igniters Tech Law).
5. Buyer due diligence: legal, IP, cyber, GDPR, employment, tax and technology. On the seller side, anticipate with a legal audit checklist and, if necessary, accelerate audits using AI.
6. Tax and legal structuring: share vs asset choice, merger/contribution, IP scope and carve-outs.
7. Transaction agreements: SPA/APA, asset and liability warranties (GAP), disclosure letters, non-compete/non-solicitation and escrow/holdback.
8. Governance and approvals: board/general meeting decisions, approval/pre-emption clauses and investor rights (drag/tag, liquidation preference).
9. Regulatory obligations: employee information/consultation, competition/sector reviews (DJS Avocats), and, for an asset deal, JAL/BODACC, objections and registration duties (Service‑Public).
10. Signing: signatures (qualified electronic signatures where possible), conditions precedent and covenants.
11. Closing: satisfaction of conditions, payments (escrow), handovers (securities, powers, source code and API keys), change of company officer if necessary.
12. Post‑closing: customer/supplier notifications, trademark/domain transfers, GDPR updates and HR/IT/finance integration.

3) Due diligence: what often blocks a deal

• Intellectual property: no written assignments from freelancers/subcontractors, open-source components with viral licences (AGPL). Remedies: retrospective assignments, OSS remediation and price/escrow adjustments.
• Customer contracts: change-of-control clauses giving termination rights; anticipate key consents.
• GDPR/data: missing DPAs, transfers outside the EU without safeguards, incomplete consent bases; remediation plan and audit timetables (essential GDPR documents).
• Employment: hybrid statuses (freelancer vs employee), reclassification risks.
• Tax: insufficient provisions (VAT, CIR), latent disputes.

Case study — In a recent matter, we advised a Series A SaaS startup: the audit revealed that 3 freelance developers had never assigned their rights in core modules. The result: assignment agreements signed, an holdback of 8% for 12 months, and a specific IP GAP clause. The price was secured without delaying closing.

4) Key documentation: securing the transfer and price

• SPA/APA (Share/Asset Purchase Agreement): definitions, scope, price and mechanisms, representations & warranties, indemnification.
• GAP (asset and liability warranties): liability limits (cap), thresholds (basket/de minimis), duration, exclusions and claims procedure; possible R&W insurance and escrow.
• Price : locked‑box (reference date and leakage) vs closing accounts, earn-out (KPIs, governance and neutralisation of integration effects).
• Post-deal clauses: proportionate non-compete (activity, duration and territory), non-solicitation and transition assistance.

For asset deals/business transfers, the agreement must contain precise particulars and triggers publications within 15 days and a 10-day objection period following BODACC publication; the price is frequently held in escrow for approximately 3 months to clear objections and claims (Parthemis Avocats; Service‑Public).

5) Internal governance and investor rights

Check your articles/shareholders’ agreement clauses in advance (approval, pre-emption, drag/tag and liquidation preference). Do not sign an LOI incompatible with these commitments. If a liquidation preference applies, anticipate how it allocates proceeds between share classes (understanding liquidation preference).

6) Regulatory compliance and legal obligations

• Competition/antitrust: some transactions must be notified and authorised before closing; failure to obtain approval may result in penalties and the transaction being challenged (DJS Avocats).
• Employee information/consultation: comply with the timetable (prior information in SMEs, CSE consultation in relevant companies), or risk a fine (up to 2%) (Marvell Avocats; Osborne Clarke).
• Asset deal/business transfer: mandatory agreement particulars, registration, JAL & BODACC within 15 days, 10-day objection period, customary price escrow and payment of registration duties (Code de commerce; Service‑Public).

7) 30-60-90-day checklist for founders

D−90 to D−60 (pre-LOI)

• Align founders and investors on the target price and structure.
• Map IP and key contracts; address gaps (freelancer assignments, DPA).
• Build and clean up the data room (step-by-step method).

D−60 to D−30 (LOI & audits)

• Negotiate exclusivity, locked-box/closing accounts and earn-out.
• Organise due diligence and Q&A; track critical remediation.
• Launch employee information/consultation where applicable.

D−30 to Closing

• Finalise SPA/APA, GAP, disclosure letters and escrow/holdback.
• Prepare corporate decisions, powers and operational handovers (cloud access, stores, DNS and INPI filings).
• For an asset deal: arrange JAL/BODACC, escrow and registration (Service‑Public).

8) Negotiation pitfalls to avoid

• Earn‑out not under control: define KPIs, governance and neutralisations precisely (changes in commercial policy, cost allocation).
• Non-compete that is disproportionate: limit activity/territory/duration to what is necessary.
• Change of control: map sensitive contracts well before the LOI to avoid an implicit veto by a key customer.
• Locked‑box: strictly regulate leakage and exceptions.
• GDPR: align documentation (DPA, records and transfers) with post-acquisition use; see our DPA guide for SaaS startups.

Quick FAQ

Share deal or asset deal? In SaaS, the share deal predominates (continuity of contracts and approvals). An asset deal is needed to isolate liabilities or target specific assets, at the cost of additional formalities (JAL, BODACC, objections and escrow).

How long does a sale take? 3 to 6 months in small/mid‑cap, depending on audit complexity, approvals (antitrust/CSE) and GAP negotiations (DJS Avocats).

What are the penalties if I forget to inform employees? A civil fine of up to 2% of the price; plan the information/consultation timetable ahead (Osborne Clarke).

Want to explore legal preparation further? Also see our article on seller-side legal due diligence.