People · Operator

Brian Callahan

Named in public records as an officer, director or promoter · active 2024–2025 · Other Technology, Restaurants

2
Companies
2
Filings
$26.3M
Combined raised · real
Serial
Operator type
Companies
CompanyRoleSectorStageRaised · realValue · estTied
Nammu21, Inc.Other TechnologySeries B$25.8M$59.2M2025
Colossal Shrimp LLCRestaurantsPre-Seed$450K$969K2024
Operator network

Brian Callahan at the center, the companies they're named on, and every other operator named alongside them — an interlock map of shared founding teams, boards and funds. Name-matched, so treat as a research lead.

Lawrence Leibowitz · 3 companies · 1 sharedLawrence LeibowitzGregory Carson · 2 companies · 1 sharedGregory CarsonBrian Fazal Callahan · 1 companies · 1 sharedBrian Fazal Calla…Greg Fazal Carson · 1 companies · 1 sharedGreg Fazal CarsonLawrence Fazal Leibowitz · 1 companies · 1 sharedLawrence Fazal Le…Someera Fazal Khokhar · 1 companies · 1 sharedSomeera Fazal Kho…Someera Khokhar · 1 companies · 1 sharedSomeera KhokharZimu Chen · 1 companies · 1 sharedZimu ChenNammu21, Inc. · $25.8M raisedNammu21, Inc.Colossal Shrimp LLC · $0.5M raisedColossal Shrimp LLCBrian CallahanBC
Brian Callahan Company Co-operator (ring = serial)Hover to isolate ties · click to open
Co-operators (shared boards)

People named alongside Brian Callahan on the same companies — an interlock signal (shared founding team, board, or fund). Name-matched, so verify before acting.

OperatorSharedTheir companies
Lawrence Leibowitz13
Gregory Carson12
Someera Khokhar11
Someera Fazal Khokhar11
Lawrence Fazal Leibowitz11
Brian Fazal Callahan11
Greg Fazal Carson11
Zimu Chen11

People are matched by normalized name across records; a common name may merge distinct individuals. Treat as a research lead, the same way modeled valuations are directional, not quoted.