Jane Street made more operating profit last year than Walmart. Walmart has 2.1 million employees. Jane Street has 3,500. That puts a market-making firm most people have never heard of at #13 on the list of America's most profitable companies. Ahead of Walmart. Ahead of Verizon. Ahead of Broadcom. Ahead of Visa. The trading numbers are more absurd. Jane Street pulled $39.6 billion in trading revenue in 2025. JPMorgan, the largest bank in America, did $35.8 billion in trading that same year.…