Event summary:

• Berkshire's mystery stock is Chubb.
• It now owns 6.4% of it (25.9 million shares out of 406.06 million shares).
• The stake is worth ~$6.6 bln.
  • = 25.9 million shares * $252.97 per share
    • where $252.97 is the closing price of CB on 2024-05-15

Notes from https://www.barrons.com/amp/articles/berkshire-hathaway-mystery-stock-warren-buffett-fe2ac440

• Berkshire
  • Bought 25.9 million shares of Chubb
  • Held about 8 million shares of Chubb at the end of Q3 2023
  • Held about 20 million shares of Chubb at the end of year 2023
  • operates the world’s largest P&C insurance business including auto insurer Geico
• Buffett
  • admires Chubb
  • generally likes to pay no more than 15 times forward earnings for a stock
• Chubb (ticker: CB)
  • is trading at about 12 times projected 2024 earnings
  • is an industry leader
  • headed by CEO Evan Greenberg
    • son of Maurice “Hank” Greenberg
  • is viewed as one of the best run big P&C insurers
  • has ample underwriting margins
  • is best known for its high-end Masterpiece homeowners insurance popular with wealthy Americans
• Maurice “Hank” Greenberg
  • is an insurance legend
  • is the former boss of AIG

From https://ycharts.com/companies/CB/shares_outstanding

• CB shares outstanding as of 2024-04-19 = 406.06 M