Our 6 ‘Best Buys Now’ Shares Enter Your Email Address Image source: Getty Images. G4S shares leap again as a higher bid arrives. What would I do now? “This Stock Could Be Like Buying Amazon in 1997” It’s been a grim year for UK shareholders, with stock prices tumbling due to Covid-19. So far, the FTSE 100 has lost 1,135 points in 2020, down almost a sixth (15%). However, it’s been a bumper year for shareholders of unloved and undervalued FTSE 250 firm G4S (LSE: G4S). G4S shares have skyrocketed since September, after it received a hostile takeover bid.G4S shares ride 2020’s roller-coasterFor the first eight months of this year, G4S shares moved in line with the wider market. At the end of 2019, the G4S share price closed at 218p and then gently declined until mid-February. Then, as Covid-19 spread, the G4S share price joined the spring market meltdown. By 3 April, G4S stock had collapsed to close at 69.92p — a sickening fall of more than two-thirds (67.9%) in just three months.5G is here – and shares of this ‘sleeping giant’ could be a great way for you to potentially profit!According to one leading industry firm, the 5G boom could create a global industry worth US$12.3 TRILLION out of thin air…And if you click here we’ll show you something that could be key to unlocking 5G’s full potential…Then, as market fears over the global economy eased, G4S shares bounced back. The share price zigzagged upwards over the next five months, closing at 145.9p on 11 September. At this point, the stock was down a third (33.1%) since 2019.14 September: a great day for G4S shareholdersOn Monday, 14 September, came delightful news for G4S’s long-suffering shareholders. GardaWorld – a Montreal-based security-services company backed by private-equity group BC Partners – made a hostile takeover approach for G4S. GardaWorld offered 190p a share in cash to buy G4S from its shareholders. G4S shares surged to close at 182.45p, up 36.55p — a leap of a quarter (25%) in a single day.The next day, I urged G4S shareholders not to rush into any decision. I argued, “this takeover bid is just the first play for G4S” and added, “I’d await a higher price before selling any shares”. This guidance proved sound when, on 3 November, another bidder joined the party. US rival Allied Universal Security Services made a higher bid of £3.3bn for G4S, or at least 210p a share. Again, I suggested that “I’d still sit tight and do nothing”. I added, “I expect a final bid for the shares to be at least 225p–230p, so I would hang on to them today”.What would I do now?Today came news of a higher, supposedly ‘final’, offer from GardaWorld valuing G4S at £3.7bn. That comes to 235p a share, 17p ahead of the 218p at which G4S stock ended 2019. This makes G4S one of an elite group of large companies whose share prices have actually gained during this terrible year.G4S shares now trade at 247p, 12p higher than GardaWorld’s offer. G4S shareholders have two weeks to accept this deal before it closes on Wednesday, 16 December. If Allied Universal wants to counter-bid, it must do so by 9 December. This suggests that time is getting tight for G4S shareholders to bag a better deal.In summary, if I were a G4S shareholder (I’m not), I’d likely sell at today’s price — at 12p above the deal on the table — and walk away. However, shareholders who can stomach the risk might hold tight to see if a higher bid emerges within a week. If it does, then they might pocket another, say, 10p to 20p. If no other offers emerge, then the most on offer is 235p from GardaWorld. At this late stage, it’s mostly a toss-up, so the choice is tricky. Either way, G4S shareholders have had a rewarding 2020, so they should rejoice and be happy! 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