Luke Cooper, 27, was today awarded £60,000 in libel damages from the Daily Mail and London Evening Standard.
The High Court decided Cooper's reputation had been "badly tarnished" by the articles, which portrayed him as a ringleader in the attack on Conservative Pary headquarters at London's Millbank Tower in 2010.
The 12-strong jury said that the Evening Standard must pay Cooper £35,000 and the Daily Mail must pay him £25,000.
In a statement issued to The Guardian after the verdict, Cooper said: "My only wish throughout these proceedings was the repudiation of the allegations made against me after the Millbank occupation.
"Today's verdict is an important vindication for me personally and means I can draw a line under the affair.
"The jury verdict demonstrates that they saw through the falsehoods both papers peddled about me and the anti-cuts movement, which continued right up until yesterday."
Cooper's libel trial was viewed as significant as it was the first such action to be heard before a jury in three years, but also expected to be among the last.