Originally Published: 21 JUN 21 12:01 ET

Updated: 21 JUN 21 13:34 ET

By Hanna Ziady, CNN Business

(CNN) -- Britain's fourth biggest supermarket chain Morrisons has become the takeover target of an American private equity firm in the latest sign of a strong appetite among investors for UK assets.

Morrisons confirmed over the weekend that New York-headquartered Clayton, Dubilier & Rice last week made an unsolicited offer of £2.30 ($3.19) per share in cash for the grocery retailer. That's a 29% premium to Morrisons' closing price on Friday, giving it a market value of around £5.5 billion ($7.6 billion).

Shares in the company surged more than 30% in London on Monday, taking the share price above the takeover offer and lifting other stocks in the sector. Sainsbury's and Ocado climbed over 4%, with Marks & Spencer rising nearly 3% and Tesco up more than 1%.

Morrisons rejected the proposal in its statement on Saturday, saying that it "significantly undervalued" the company and its future prospects. Clayton, Dubilier & Rice now has until July 17 to make a firm offer.

The move comes amid heightened investor activity in UK retail and a spate of takeover bids for British companies, undervalued for years because of poor returns linked to drab growth and a weak pound following the Brexit referendum of 2016.

In October, Walmart sold supermarket chain Asda to European private equity group TDR Capital and the founders of a global convenience store business. Separately, Czech billionaire Daniel Kretinsky recently increased his stake in Sainsbury's to 10%, adding to speculation that it could be the next takeover target.

Analysts are speculating that Tesco, Britain's biggest supermarket chain, might also attract a buyer.

"The volume of liquidity, reflecting monetary policy, and the uptake of capital by family offices, high net worth investors and private equity, means that even Tesco, with its £18 billion ($25 billion) market capitalization, is not too big to be subject to an offer," Clive Black, head of research at Shore Capital said in a note on Monday.

Sainsbury's and Tesco, which benefited from a surge in demand during lockdowns, are now poised to benefit from a strong economic recovery in Britain following the pandemic. Analysts say shoppers are likely to continue eating more meals at home even with restaurants reopening, particularly as many offices remain closed.

Tesco CEO Ken Murphy told analysts on a call on Friday that online demand has been "incredibly resilient even with the easing of restrictions."

"We expect sales to remain well above pre Covid-19 level through the remainder of the year," he added.

Both leading retailers have also managed to keep costs under control, are generating large amounts of cash and have narrowed price gaps with German discounters Aldi and Lidl, according to Shore Capital's Black.

This could make them prime targets for the likes of Amazon, he added. "The Asda bid and the Kretinsky investment means that the topic of Amazon's plans will also be one of ongoing discussion around Sainsbury and Tesco," Black said.

The online retailer, which has been expanding its grocery offering since buying Whole Foods in 2017, already has a close relationship with Morrisons, which supplies its Prime and Pantry customers in the United Kingdom with dry, fresh and frozen products.

But the market is not betting on a rival bid from Amazon. "There is no indication in the [Morrisons] share price today that Amazon will come in and outbid Clayton, Dubilier & Rice," said Russ Mould, investment director at stockbroker AJ Bell.

With a languishing share price and over £7 billion ($9.7 billion) in assets, including a real estate portfolio worth more than the company's market value, Morrisons "ticks a lot of private equity boxes," he told CNN Business.

Returning to favor?

Investor interest in UK assets extends beyond grocers. There have been over 50 bids for UK-listed companies in the last eight months, only six of which have since been abandoned, according to Mould.

The average premium offered has been 34%, indicating that many of these companies may be undervalued by the market following years of weak shareholder returns. Over the last 12 months, there have been 95 announced offers for UK-listed companies with a combined value of $107 billion, according to Dealogic data.

"The UK has consistently underperformed on the global stage since June 2016's Brexit vote and sterling has failed to regain the levels at which it traded before Britain decide to leave the EU," Mould said in a recent note. "That rotten effort may mean that UK stocks are unloved and therefore potentially undervalued," he added.

UK and European stock market indexes stand to benefit from the post-pandemic recovery, given the high representation of companies such as automakers and banks that perform well when the economy is on the upswing.

They may also offer better value for investors following much more robust gains in US indexes over the past decade, when European markets have been held back by a dearth of tech companies and lackluster economic growth in the region.

The FTSE 100 has climbed just 26% over the past decade, while Europe's STOXX 600 is up 85%. That compares with a gain of more than 230% for the S&P 500.

— Julia Horowitz contributed reporting.

Correction: An earlier version of this article misstated the number of bids for UK-listed companies recorded over the past year.