On the defendants' bench sat - in addition to Ikea itself as its own party - two former CEOs of the company, nine other people from its top management and four police officers.
They were accused of, among other things, helping to illegally collect information about both employees, dissatisfied customers and people applying for jobs at Ikea in France.
According to the prosecutor, one of the top managers must, among other things, have repeatedly sent lists of employees 'names to private detectives to check the employees' activities, including their political views and trade union activities.
The company also hired actors who infiltrated the department stores to spy on staff.
Hundreds were monitored
According to the indictment, around 400 employees in France have been monitored, reports the news agency AFP.
The accused police officers must have been paid by the company to disclose sensitive information about private individuals - information that only the judiciary has the right to receive.
The scandal was revealed about nine years ago.
The court proceedings have focused on surveillance that should have taken place between 2009 and 2012 - but according to the prosecutor, it all should have started already a decade earlier than that.
After the revelation, Ikea fired four top managers, but Ikea France still risked a fine of around SEK 20 million.
When the verdict came on Tuesday, the amount of the fine was set at one million euros, corresponding to around ten million Swedish kronor.
Several of the accused persons also risk multi-year prison sentences.
"Set an example"
Ahead of the court proceedings, which began at the end of March, Ikea France's lawyer said that since the revelation, the company has taken strong action and has completely different employment routines today.
- Regardless of what the court decides, the company has already been punished very severely in terms of its reputation, said lawyer Emmanuel Daoud then.
Prosecutor Paméla Tabardel demanded a hefty fine from Ikea to set an example and send a "strong message to all companies", reports AFP.
More than 10,000 people are employed by Ikea in France. The company has 34 department stores in the country.