Dual-Class Structures and Sunset Clauses

Most public shareholders assume one share means one vote. Dual-class companies break that link on purpose. A founder can own a fraction of the economic value of the company and still control every board seat, every merger vote, and every proxy fight, because their shares carry more votes than everyone else's.

Dual-class structures create at least two share classes with identical or near-identical cash-flow rights (same dividends, same claim in a liquidation) but unequal voting power. The common pattern is Class A shares sold to the public at one vote each, and Class B shares held by founders or insiders at ten votes each, or more. A founder who sold down to 15% of the economic ownership can still hold well over 50% of the votes.

Reading the wedge

The number to track is the voting wedge: economic ownership minus voting control. A founder with 20% of shares outstanding but 10-to-1 super-voting stock on a third of the company can hold a majority of votes while owning a minority of the cash flows.

Worked example

A company has 90 million Class A shares (1 vote each) and 10 million Class B shares (10 votes each), all held by the founder. Total votes: $90{,}000{,}000 \times 1 + 10{,}000{,}000 \times 10 = 190{,}000{,}000$. The founder's voting share is $100{,}000{,}000 / 190{,}000{,}000 \approx 52.6\%$, control, while owning only $10{,}000{,}000 / 100{,}000{,}000 = 10\%$ of the economic stake, i.e. 10% of any dividend or liquidation proceeds.

Sunset clauses

Because index providers and governance-focused investors dislike permanent control without matching ownership, many dual-class IPOs now include a sunset clause: a pre-set trigger after which super-voting shares automatically convert to ordinary one-vote shares. Common triggers are a fixed number of years after the IPO (a time-based sunset), the founder's death or departure (an event-based sunset), or the founder's economic stake falling below a threshold, such as 5% (an ownership-based sunset). A time-based sunset is the easiest for outside investors to underwrite, because the expiry date is known in advance and can be priced into governance risk; an ownership-based sunset can, in principle, never trigger if the founder never sells down.

What this means in practice

Index providers such as S&P and FTSE Russell now exclude or cap the weight of companies with extreme, sunset-free dual-class structures, which affects passive flows into the stock regardless of fundamentals. Risk arbitrageurs pricing a takeover also watch the vote count directly: a bidder needs to win over whoever holds voting control, not whoever holds the most economic value, so a hostile approach that would succeed under one-share-one-vote can be dead on arrival against a founder's super-voting block.