The protest, dubbed "Love is stronger than fear," was called by Navalny's allies for Valentine's Day in solidarity with people detained in recent opposition protests.
Russian power giant Nornickel had its compensation appeal rejected and will now pay for the 21,000 tonne spill.
Demonstrations took place across Russia in support of Kremlin critic Alexei Navalny despite a crackdown by authorities.
The opposition leader used his court appearance to tell the Russian government: “Yes, you have the power now to put me in handcuffs, but it's not going to last forever.”
The raids come after protests across Russia at the weekend demanding the release of Navalny.
Protests are planned across 60 Russian cities on Saturday in support of jailed opposition leader Alexei Navalny
The opposition figure returned to Russia on Sunday five months after he arrived for treatment and convalescence in Germany for nerve agent poisoning.
The Russian President takes part in a traditional Orthodox ritual to mark the feast of Epiphany every year.
"Alexei Navalny's ideas and hopes for his country come before his own personal ambitions and safety," Red Notice author Bill Browder told Euronews.
Police raided the home of activist Lyubov Sobol on Christmas day after she knocked at the door of an alleged FSB agent who Alexei Navalny says took part in the plot to poison him.