KPN cut its dividends and wound up issuing 3 billion euros worth of new shares in April 2013. Shares eventually sank to a low of 1.37 euros each before recovering to around 2 euros before Slim announced plans for his bid.
Shares closed Wednesday at 2.35 euros per share.
KPN agreed the E-Plus sale in July and many saw it as a move intended as a poison pill measure to thwart a takeover by Movil. But Movil surprised many analysts by agreeing to support the E-Plus sale after Telefonica raised its initial offer price.
Then Movil's bid for KPN hit a major speed bump in late August when the "KPN Foundation" an independent group established to protect the company's interests branded Slim's takeover attempt as "hostile."
The Foundation exercised an option it has to issue itself preference shares with a 49.9 percent voting right in KPN as a measure to thwart the Movil takeover. It instructed the companies' boards to enter negotiations over a Movil bid that both boards could support.
Movil has said it does not intend to raise its offer for KPN, and has threatened to walk away if the KPN Foundation persists.
Since then, neither company has announced any progress over the deal.
Telefonica intends to merge E-Plus with its own operations in Germany, creating a new, strong player. It would have 43 million mobile customers, more than either Deutsche Telekom or Vodafone, though with less revenue and profit.
European regulators have yet to approve the E-Plus - Telefonica combination.