# Bloomberg Billionaires Index

Type: Company

Source: GetYourBrief — https://getyourbrief.com/entity/bloomberg-billionaires-index-company
Canonical HTML page: https://getyourbrief.com/entity/bloomberg-billionaires-index-company

## Timeline

- **2026-11**: California ballot showdown — Voters decide Proposition 40 wealth tax and countermeasures Proposition 41 and Proposition 42.
- **2026-08**: Brin's 2026 contributions reach $102 million — California Secretary of State data show $102 million in 2026 contributions to Building a Better California, including a $20 million latest donation.
- **2026-06-24**: Trillionaire Status Lost — The Bloomberg Billionaires Index valued Musk's net worth at $946 billion, marking the end of his brief tenure as a trillionaire.
- **2026-06-23**: Tesla Decline — Tesla shares dropped nearly 6%, further reducing Musk's net worth as investor sentiment soured on tech.
- **2026-06-22**: SpaceX Plunge — SpaceX stock fell 16% in a single session amid a broader tech sell-off, erasing around $240 billion from Musk's fortune.
- **2026-06-16**: Peak Stock Price — SpaceX shares surged to an all-time high of $225.64, briefly pushing Musk's net worth to approximately $1.32 trillion.
- **2026-06-12**: SpaceX IPO — SpaceX priced its IPO at $135 per share, opened at $150, and reached a market valuation of $1.77 trillion. Musk's 42% stake lifted his net worth above $1 trillion for the first time.

## Recent coverage (4 stories, network-wide)

### Brin's $102M Anti-Wealth-Tax Push Puts CA Startup Wealth at Risk
2026-08-13 04:06:15 · Sector: startups · Sentiment: Neutral · Impact: 5/10 · Sources: 2

California's Proposition 40 would tax billionaire net worth, potentially hitting startup founders and early employees sitting on unrealized gains. Sergey Brin's $102 million counter-campaign shows how the state's wealthiest tech leaders are mobilizing to protect founder economics.
Full story: https://getstartupbrief.com/story/brin-102m-california-startup-wealth-tax

### Brin Spends $102M to Block California Wealth Tax via Two Ballot Measures
2026-08-13 04:06:05 · Sector: legal · Sentiment: Neutral · Impact: 5/10 · Sources: 2

Sergey Brin has put $102 million behind Proposition 41 and 42, companion ballot measures that could nullify California's proposed wealth tax, Proposition 40. The November 2026 vote sets up a significant direct-democracy and constitutional test over how states may tax billionaire net worth.
Full story: https://getlegalbrief.com/story/brin-102m-california-wealth-tax-legal-battle

### $284B Brin Fortune at Center of $102M California Tax Fight
2026-08-13 04:05:54 · Sector: finance · Sentiment: Neutral · Impact: 5/10 · Sources: 2

Sergey Brin's $284 billion fortune makes him a prime target for California's proposed wealth tax, and he has spent $102 million trying to block it via two companion ballot measures. The November 2026 vote could reshape where ultra-high-net-worth capital resides and how states tax wealth.
Full story: https://getfinancebrief.com/story/brin-284b-fortune-california-wealth-tax-finance

### SpaceX 30% crash wipes $240B from Musk’s wealth signals space sector jitters
2026-07-27 16:30:44 · Sector: space · Sentiment: Strongly negative · Impact: 6/10 · Sources: 3

SpaceX’s sharp stock reversal erased $240 billion from Elon Musk’s fortune in one day, highlighting the volatility of commercial space valuations. The sell-off raises critical questions about investor confidence in space ventures and the stability of funding for ambitious defense and exploration programs.
Full story: https://getspacebrief.com/story/spacex-30-percent-crash-musk-wealth-space-jitters

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