LONDON — It’s no fun being in the middle.

Heineken, Molson Coors and Carlsberg are storied brewers that trace their roots back hundreds of years and have loyal drinkers around the world. But the merger of their two biggest competitors leaves such mid-size brewers without a clear way forward.

FILE - In this Tuesday, Oct. 13, 2015, file photo, drinks sit on the bar in a pub in London. The world's two biggest beer makers will join forces to create a company that produces almost a third of the world's beer, as Budweiser maker AB InBev announced Wednesday, Nov. 11, 2015, a final agreement to buy SABMiller for 71 billion pounds ($107 billion). But in the U.S., the deal will not bring arch rivals Budweiser and Miller under the same roof. AB InBev's brands include Budweiser, Stella Artois and Corona, while SABMiller produces Peroni and Grolsch. (AP Photo/Kirsty Wigglesworth, File)

They find themselves squeezed between a Goliath that will produce almost a third of the world’s beer and a growing army of craft brewers.

Some experts say the mid-sized brewers should respond by pursuing takeovers of their own. Others argue that would do little good because the underlying problem is that consumers are increasingly drinking craft beers, not mass market brands.

“There are so many craft beers out there,” said Jonny Forsyth, a global drinks analyst at Mintel. “They can’t buy them all up.”

Discussions about world domination heightened Wednesday when Budweiser maker Anheuser-Busch InBev agreed to buy SABMiller for 71 billion pounds ($107 billion). That combination would account for 29 percent of the world beer market, making it three times bigger than its nearest rival Heineken, with a mere 9 percent, according to the market data firm Euromonitor.

Beer makers looking to bulk up in response will have few options because some of the likely targets are privately held and not interested in selling, said Jeremy Cunnington, the senior alcoholic drinks analyst for Euromonitor.

“There isn’t that much else to buy or acquire,” Cunnington said.

Heineken N.V. has public shareholders, but the family owns 50.5 percent of the shares, “retaining family involvement and vision.” Carlsberg is also controlled by a foundation, which has 75 percent of the votes.

To ease regulatory concerns in the United States, SABMiller will sell its 58 percent stake in a venture with fellow brewer Molson Coors for $12 billion.

But AB InBev would still be the No. 1 player in North America – as well as Australasia, Latin America, the Middle East and Africa. In Europe, it would lag behind only Carlsberg in the east and Heineken in the west, according to Euromonitor.

AB InBev was attracted to the deal because it wants to grow sales through SABMiller’s brands in Africa and Asia, where drinkers are expected to increasingly buy brand beers as their wealth increases.

In developed markets, by contrast, the big companies are seeing sales decline and trying to fight craft brewers. Consumers, bored with the previous offers, began fleeing the big brands in the 1980s in favor of more complicated craft brews.

“Beer drinkers … these days are far less brand loyal,” said Duane Stanford editor of Beverage Digest. “There’s a lot of room to play.”

Beer companies have tried to counter the trend by buying craft brewers. They have also tried to replicate what the craft brewers have done or at least evoke their ethos. Carlsberg, for example, calls their founder “probably the first hipster,” and said he opened his first micro-brewery in 1847.

AB Inbev’s deal is far from completion, facing regulatory hurdles.

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