Rebekah Brooks said her thoughts were with her former colleagues who face future trials as she spoke on the steps of her North London home.
She said: "I have to be careful for my former colleagues sake what I say" she said.
She added that her thoughts were with them as they face trials in the future.
Her husband Charlie Brooks, who was cleared alongside his wife, said he concerned about former News of the World editor Andy Coulson who was found guilty of phone hacking.
He said: "Obviously I am really concerned for Andy and (his wife) Eloise and their family."
Rebekah Brooks has been acquitted on all charges related to phone hacking. Brooks, from Chipping Norton, was overcome with emotion and led away by the court matron.
Former News of the World editor Rebekah Brooks has been found not guilty on all charges related to phone hacking. Andy Coulson was found guilty of phone hacking.
NI Group Ltd's accounts show that £10.8m was paid to Rebekah Brooks, as compensation after she resigned as chief executive of News International. The former newspaper editor, a resident of Chipping Norton, will also have legal and other professional costs paid.
Mrs Brooks told the Leveson Inquiry earlier this year that Mr Cameron signed some of his missives to her 'LOL' - mistakenly thinking it meant 'Lots of Love' rather than 'Laugh Out Loud'.
Both of the messages disclosed by the MoS were sent in October 2009, shortly after Mrs Brooks left her job as editor of The Sun and became chief executive of News International, which owns the paper.
In one message obtained by the Mail on Sunday, the Prime Minister thanked Mrs Brooks for letting him ride one of her horses, joking it was "fast, unpredictable and hard to control but fun".
In another the journalist, who faces trial in connection with the phone hacking scandal, praised Mr Cameron's speech to Tory conference, saying: "I cried twice."
The playful texts are apparently part of a cache of texts and emails handed to Lord Justice Leveson's media standards inquiry.
Former News International chief executive Rebekah Brooks, from Oxfordshire, is to face charges over phone hacking, it was announced today.Read the full story ›
Mrs Brooks, 44, & Mr Brooks, 49, who live in Sarsden, near Chipping Norton, in Oxfordshire were bailed pending a preliminary hearing at Southwark Crown Court on Friday next week
Rebekah Brooks is due in court today, charged with three charges of conspiring to pervert the course of justice.Read the full story ›