AstraZeneca Plc CEO David Brennan

AstraZeneca Plc CEO David Brennan

Andrey Rudakov/Bloomberg

AstraZeneca Plc Chief Executive Officer David Brennan hasn’t announced an acquisition of more than $1 billion since buying MedImmune Inc. in 2007 for about $15.2 billion, and the company says it’s not looking for another deal of that size.