Holding steady at the same spot in the rankings, AIG swung to a profit in 2019 as revenues grew 5%. A comparatively mild hurricane season helped the company, which pays out insurance claims when natural disasters hit. While profits last year were also buoyed by big investment gains, this year’s market dive has already dragged earnings down significantly. And AIG is also bracing for a major hit in 2020 as insurance policyholders file claims for lost business as a result of the coronavirus pandemic.