1. Musk becomes first person ever to see wealth top $500bn  BBC
2. Tesla and SpaceX CEO Musk becomes world’s first half-trillionaire  Australian Broadcasting Corporation
3. Elon Musk makes history as first person ever to hit $500B net worth milestone: report  Fox Business
4. Musk becomes first person to hit $500 billion net worth, Forbes list shows  Reuters
5. Elon Musk Just Became The First Person Ever Worth $500 Billion  Forbes

Source: Google Finance – Market News