Ecolab Announces Plan to Buy Back Stock At Henkel’s request, Ecolab has filed a registration statement with the Securities and Exchange Commission that would enable Henkel to sell all 72.7 million Ecolab shares it holds. Ecolab and Henkel have also agreed to amend the stockholder’s agreement between the parties to facilitate the offering.     Ecolab further announced that it has agreed to purchase $300 million of its shares directly from Henkel in conjunction with Henkel’s sale of Ecolab...