Morgan Stanley’s dominant 82.5% implied probability stems from its role leading Anthropic’s recent $15 billion syndicated credit facility and positioning as the frontrunner for the “lead left” slot in the underwriting syndicate ahead of a potential $2 trillion Nasdaq listing. Goldman Sachs holds the secondary 16.1% share, reflecting expectations it will serve as stabilization agent, mirroring its SpaceX assignment and supported by its prominent commitment in the same debt round alongside JPMorgan and Citigroup. Lower probabilities for Citigroup, Barclays, and others align with their smaller tiered commitments in the pre-IPO financing that effectively determined syndicate hierarchy. With investor meetings scheduled for October 14 and marketing eyed for early November, the market-implied odds price in these established relationships and execution momentum while acknowledging final allocations remain subject to company discretion.