The last big name from the old days at Anheuser-Busch is leaving Pestalozzi Street.

Dave Peacock, who went from August Busch IV's right-hand man to Carlos Brito's U.S. point man, resigned from Anheuser-Busch InBev Monday, a move some see as one of the final steps of the brewery's transition to new ownership.

The 43-year-old – a second-generation A-B employee who met his wife on his first day of work there – says the parting was his idea, and amicable. He'll remain an adviser to the company, but he wants to do something else while he's still young enough to do so.

“I've been really blessed,” Peacock said. “When you grow up in St. Louis and your dad works for the brewery, you never even dream you're going to have a shot at the job I had. But it's time to try something different.”

In leaving, according to regulatory filings, Peacock appears to be walking away from stock options that would today be worth roughly $28 million. The arrangement required that he stay five years after the merger and that the company meet financial targets. It was unclear Monday if he received other compensation upon resigning.

Peacock's departure comes three years into a transition that has seen many of the brewer's top local executives leave, and as A-B InBev searches for ways to grow its iconic Budweiser and Bud Light brands despite a tough economy for big beer. The well-liked Peacock – whose title was president of Anheuser-Busch - was in charge of U.S. operations for A-B InBev. He played a key role in helping the Belgian-Brazilian conglomerate absorb its big acquisition, said Tom Pirko, managing director of Bevmark, a food industry consulting firm.

Now, with the takeover fading in the rearview mirror, the challenges are different.

“They're in to Phase Two now,” Pirko said. “Phase Two is an ability to stabilize and grow the business. That requires new thinking, new blood. The company's got to deliver in a way that it hasn't been delivering in the last few years.”

That job will fall to Luiz Edmond, a Brazilian who has been been A-B InBev's North America zone president, and Peacock's boss, since the takeover. He's been based in St. Louis and will remain here, and add Peacock's U.S. duties to his portfolio.

“Dave has been a great colleague, embracing and leading many changes that we agreed would be difficult, but that would ultimately benefit the U.S. business in the long term,” Edmond said in an e-mail to employees Monday. “He has helped Brito, me and the global and zone management teams in transitioning the company in many ways over the last three years.”

Peacock had worked at Anheuser-Busch since 1992 and rose through the ranks to become its vice president of marketing and a close confidant of August Busch IV. He bled Budweiser, colleagues said, and was widely seen as a rising star in the industry.

Peacock played a crucial role in the days after Anheuser-Busch agreed to InBev's terms in July 2008. He joined Busch – and did most of the St. Louis brewery's talking – on a Monday morning conference call with Brito announcing the deal. The next day, according to Dethroning the King, a book by writer Julie McIntosh that chronicles the takeover, it was Peacock who gave Brito a ride to the brewery for his first visit as the new boss.

Peacock's efforts were noticed, and he was alone among top A-B executives in having a major role at the new company. For the last three years, he helped to manage cuts, smooth relations with employees and distributors, and served as A-B InBev's face in the U.S., including St. Louis.

But some industry-watchers suspect Peacock had had his fill. The business keeps getting tougher for big brewers, said Harry Schumacher, publisher of trade publication Beer Business Daily. Craft beers and spirits are eating market share, and more fights likely loom with distributors.

“They're really getting sandwiched from both sides, and they're going to need some changes,” Schumacher said. “I don't think Dave wanted to go down that road and be the bad cop.”

In an interview Monday, Peacock said he'd been mulling the move for about a year, and that he's leaving Anheuser-Busch in good hands, both with Brito and Edmond and with a core of U.S.-based executives who worked under him. He's not sure what he plans to do next, but said he thinks he'll stay in St. Louis, where his family lives and his children are in school.

And as for leaving behind those stock options – which were likely to start paying out in less than two years – he said it's not really about the money.

“I didn't really mind leaving that money on the table,” Peacock said. “It was just the right time for me.”