What are tag-along rights and when would a founder use them?

Full Explanation

Tag-along rights allow minority shareholders (founders) to participate in a transaction on the same terms as majority shareholders, preventing founders from being left behind in a sale. Tag-along is the inverse of drag-along: if the majority (investors) sells shares to a third party, minority shareholders (founders) can require the buyer to acquire their shares at the same price and valuation. Example: investors own 60% and negotiate an acquisition at £10M (£16.67 per share). Founders with 40% can tag along and force the buyer to purchase their 40% at the same £16.67/share price, netting £6.67M to founders. Without tag-along, a buyer could pay investors a premium for control (£20/share) whilst giving founders only £10/share. Tag-along prevents this discrimination. Tag-along is standard market protection for all shareholders, not just founders. The threshold is typically modest (20-25% ownership) because any minority wants this protection. For investors, tag-along is universally accepted because it encourages the full shareholder base to cooperate in exit negotiations — no one gets left behind, so everyone is incentivised to accept the best offer. Understanding the legal and economic terms in venture capital agreements is essential for founders because these terms directly affect how value is distributed at exit. The headline valuation — pre-money or post-money — is only one dimension. Liquidation preferences, participation rights, anti-dilution provisions, and protective covenants can collectively shift millions of pounds between shareholders in exit scenarios. Founders who understand these mechanics negotiate better outcomes and avoid surprises when a transaction closes.

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