If you wish to express regret for your actions, that would be most appropriate.

He also expressed regret for his actions.

I just wanted to express my own thanks for your actions at Boxtop.

They expressed no remorse for their actions, and performed a reenactment of the attack before security officials.

In a final statement, Grossman expressed deep remorse for his actions and accepted responsibility.

He expressed no regret for his actions.

She gave a banquet to express her gratitude for Zhang's actions.

However, he expressed no regret for his actions before and during the strike.

He expressed remorse for his actions during the war and pleaded guilty to persecutions.

Indeed, she expresses remorse for her actions and has served many years in prison.