DOW JONES NEWSWIRES 
 

CF Industries Holdings Inc. (CF) shareholders pulled back their tendered shares in droves the past month as Agrium Inc. (AGU) said it would continue a takeover effort of its fellow fertilizer maker.

Agrium had threatened to walk away from its $3.7 billion buyout effort if a sufficient number of CF holders didn't show support by a June deadline. As such, 62% of CF shares were tendered in support of the deal and Agrium said it would continue to pursue a takeover.

But Agrium said on Monday as it extended its tender offer another four weeks, just 10.4 million shares were tendered and not withdrawn as of 5 p.m. EDT Monday. That compares with last month's total of 30.1 million; there are about 49 million CF shares oustanding.

Agrium President and Chief Executive Mike Wilson didn't comment on the sharp drop in a statement disclosing the tender-offer extension. But he did say his company is "fully committed" to completing a deal.

CF has repeatedly rejected Agrium's approaches, instead pushing for a takeover of a third fertilizer company, Terra Industries Inc. (TRA). But Terra has repeatedly said no to CF.

Agrium shares closed Friday at $40.64 while CF finished at $72.98. The stocks were inactive premarket. Agrium's offer is one of its shares and $35 for each share of CF.

-By Kevin Kingsbury, Dow Jones Newswires; 212-416-2354; kevin.kingsbury@dowjones.com