They are seeking 1.8 billion euros ($2.4 billion) in compensation.
Porsche has been accused of misleading markets in the run-up to its takeover bid for VW in 2008.
Porsche initially dismissed speculation it was seeking to takeover VW, but later revealed that it owned or had positions on almost 74% of VW shares.
Some investors had bet against Volkswagen shares, expecting them to fall in the absence of any firm takeover bid from Porsche.
However, Porsche’s disclosure of an increased holding triggered an unprecedented stock market squeeze on VW shares as investors rushed to buy them to cover their short positions.
Porsche, which has earlier faced similar cases, has denied any wrongdoing.
“Porsche SE and its supervisory board members will defend themselves with all available legal means,” the carmaker said.
Porsche’s attempt to take over Volkswagen eventually failed as it fell short of acquiring the required 75% stake.
The global financial crisis and the slump in the automotive sector made it difficult for the carmaker to raise enough money to buy the remaining stake.
Nevertheless, it accumulated large amounts of debt in the process and was sued by investors who accused it of misleading them.
In a dramatic turnaround of events, the firms agreed a deal in 2009 under which Volkswagen agreed to take over Porsche.
Volkswagen acquired a 49.9% stake in Porsche in 2009.
In 2012, the firms agreed another deal, under which Volkswagen bought the remaining 50.1% stake in Porsche for 4.46 billion euros plus one VW common share.
The US House Ethics Committee has voted to release its report on former Republican Representative…
ABC News has agreed to pay $15 million to President-elect Donald Trump to settle a…
South Korea’s parliament has voted to impeach President Yoon Suk Yeol over his failed attempt…
Israeli war planes have carried out more than 100 air strikes in Syria on December…
President-elect Donald Trump has threatened to impose 100% tariffs on the BRICS countries if they…
Syrian troops have withdrawn from the city of Aleppo following an offensive by rebels opposed…