Doomberg is the pseudonymous green-chicken persona behind the most-read finance newsletter on Substack, with 373,000+ subscribers. Run by a tight-knit team of former heavy-industry executives and private-equity professionals, Doomberg delivers lateral-thinking analysis on energy, finance, and geopolitics - unapologetically pro-nuclear, data-driven, and fiercely independent. Launched in May 2021, the publication grew from zero to the #1 finance newsletter on Substack without spending a dollar on marketing, making it one of the most remarkable organic media success stories of the independent publishing era.
Sahil Bloom is a New York Times bestselling author, investor, and creator who left a Vice President seat at a $3.5B private equity firm to build one of the internet's most-followed newsletters. His Curiosity Chronicle reaches over 800,000 subscribers weekly with ideas on wealth, time, and purpose. His 2025 book 'The 5 Types of Wealth' became an instant bestseller, and in late 2025 he co-founded Wild Roman, a 100% natural men's skincare brand named after his son. A former Division I pitcher at Stanford, he runs sub-3-hour marathons and deadlifts 525 pounds in his spare time.
Zarna is building the first cohort of AI associates for private capital - autonomous agents that plug directly into a firm's data and work like a deal team that never sleeps. Founded by four UC Berkeley alumni who were previously forward-deployed engineers at AEA Investors, Zarna automates the grunt work of private equity: tearing down CIMs, building LBO models, drafting IC memos, updating CRMs, and surfacing warm introductions. Backed by Y Combinator (F25), the platform recovers ~80 hours per week for 15-person deal teams and promises full ROI in under 90 days.