Dual-Class Share Structures Spread After SpaceX IPO, Voting Power Imbalance Affects Companies Worth Over $10 Trillion in Market Cap
Miles Bennett
SpaceX completed the largest IPO ever, raising over $85 billion, yet Musk keeps more than 80% of voting power with roughly 40% of shares; dual-class companies in the S&P 500 now top $10 trillion in market cap, eroding the one-share-one-vote principle at systemic scale.
How extreme is SpaceX's governance structure?
Musk holds roughly 40% of shares but controls over 80% of voting power — through Class B stock carrying 10× the votes of ordinary Class A shares.
This means → every other shareholder combined owns 60% of the company but commands less than 20% of the say on major decisions.
SpaceX's Texas incorporation adds another layer: its charter can require shareholders to hold at least 3% of equity to sue directors — at current valuation, that threshold runs into tens of billions of dollars.
In plain terms = ordinary shareholders can neither outvote him nor sue him. The New York State Common Retirement Fund wrote to Musk calling the structure "novel and extreme."
This isn't just one company — how big is the trend?
Dual-class companies in the S&P 500 now account for over $10 trillion in market cap — more than 15% of the index.
Add SpaceX, not yet in the index at roughly $2 trillion, and the real share is even larger.
Last year, 20% of IPOs used unequal voting structures, up from 9% two decades ago.
This reflects a structural shift: dual-class stock has moved from an exception to a pattern — more founders are locking in control at the moment they go public.
Which tech giants use the same playbook?
Meta: Zuckerberg holds about 13% of shares but commands roughly 60% of votes.
Alphabet: Page and Brin together hold about 10% of shares yet control over 50% of votes.
This means → these companies are too large for fund managers to drop from benchmark portfolios — skip them, and your performance trails the index.
In plain terms = institutional investors' ability to "vote with their feet" is effectively neutralized — it's not that they don't want to leave, it's that they can't afford to.
How did dual-class stock become so common?
In the 20th century, media companies pioneered dual-class structures — a setup letting founders retain majority voting power with a minority stake — to shield editorial independence from commercial pressure. The New York Times, Fox, and News Corp still use them.
Google adopted the model when it went public in 2004; tech founders have since expanded its use.
This reflects a fundamental mismatch: the structure was designed to protect newsroom independence, but it now lets founders of trillion-dollar companies operate largely beyond shareholder reach.
What is the real dispute?
Kyle Seeley — a member of the New York State retirement fund's board and a director of the Council of Institutional Investors — put it bluntly: "Shareholders are the owners of the company, not founders."
He argues that when a company taps public markets, the public becomes its owner — and SpaceX's structure "should be deeply concerning to any investor."
In plain terms = the unresolved question is this: when these companies are too big to exclude, do investors have any remaining lever to hold founders accountable?
Content is for reference only, not financial advice.