Hamilton Insurance Group is a Bermuda-based specialty insurance and reinsurance company founded in 2013. Hamilton writes property, casualty, and specialty risks for commercial and institutional clients globally, operating through three platforms: Hamilton Global Specialty (Lloyd's Syndicate 4000, writing specialty and casualty insurance and reinsurance), Hamilton Select (a U.S. E&S casualty carrier for small to mid-sized accounts, launched in 2021), and Hamilton Re (a Bermuda-based reinsurer writing property, casualty, and specialty globally). The U.S. E&S market is a core distribution channel, allowing Hamilton to flex pricing and terms on hard-to-place risks that admitted carriers won't cover. Hamilton distributes through brokers, with Marsh McLennan, Aon, and Arthur J. Gallagher collectively accounting for over half of gross premiums written. Hamilton makes money two ways: underwriting profit (premiums minus losses and expenses) and investment income. On the investment side, Hamilton splits its float between a traditional investment-grade fixed income portfolio and the TS Hamilton Fund, a dedicated allocation to Two Sigma's quantitative hedge fund strategies targeting ~10% annual returns. This hedge fund allocation — uncommon among insurance peers — has averaged ~13% annually since 2014. Hamilton also manages third-party capital through Ada Re, earning management and performance fees without deploying its own balance sheet. Casualty reinsurance, written primarily on a quota share basis, has been the key growth driver in recent years.