The Cairo court said Greste, along with Canadian Mohamed Fahmy and Egyptian producer Baher Mohamed, had broadcast "false" news that had harmed Egypt and sentenced them to three years in jail.
The case has become an embarrassment for Egyptian President Abdel Fattah al-Sisi, who has said he wished the reporters had been deported rather than put on trial.
He may pardon them if he chooses.
"In the absence of any evidence of wrongdoing, the only conclusion that we can come to is that this verdict was politically motivated," Greste, who was tried in absentia after being deported early this year, told reporters in Sydney.
"It is now up to President Sisi to do what he said he would do from the outset and that is pardon us if we were ever convicted."
The three journalists were sentenced to between seven and 10 years in jail last year, but an appeals court in January granted them a retrial, saying the verdict had not been backed by evidence.
They were arrested in December 2013, months after the military overthrew Islamist president Mohamed Morsi and launched a deadly crackdown on his supporters.
"It's a dangerous precedent in Egypt that journalists can be locked up simply for reporting the news and courts can be used as political tools," she said.
Canada called for the "immediate return" of Fahmy, while Qatar-based Al-Jazeera denounced the verdict as an "attack on press freedom".
"It's a dark day for the Egyptian judiciary," Giles Trendle, the English channel's acting managing director, told reporters in Doha.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
