MRSH ▼ -1.3% - Marsh & McLennan Companies, Inc. $MRSH - Marsh's Oliver Wyman joins Anthropic's Claude Partner Network Marsh & McLennan Companies fell 1.3% today following an announcement that its Oliver Wyman subsidiary has joined Anthropic's Claude Partner Network. The partnership positions Oliver Wyman to integrate Claude's AI capabilities into its consulting services, though the headline does not specify a direct financial reason for the stock's decline. 27-AUG-2026 11:05 AM ET