.

Let me state clearly that we at ACME Ltd. will resist the hostile takeover with all our might.

Literal

We ACME Ltd. [as-としては], all-power [with-を持って] hostile acquisition [against-に] oppose thing [quotative-と], clearly-state-[preparatory-ておこう].

敵対的買収 'hostile takeover/acquisition.' 全力を持って 'with all one's might.' 明言しておこう 'let me state clearly (for the record)' — 明言 'clear statement' + ~ておく (preparatory) + volitional. A formal corporate defense statement.