A third figure in the Magna Technologies...

A third figure in the Magna Technologies Inc. stock manipulation case has been sentenced. Robert Gutstein, an Agoura Hills plastic surgeon who was chairman of the now-defunct Thousand Oaks company, was ordered Monday by a federal court judge in Los Angeles to spend six months in a community treatment center, do 1,500 hours of community service and pay $5,000 in fines.

Gutstein, 55, was found guilty by a federal jury in June of one count of conspiracy and four counts of securities and wire fraud. According to federal prosecutors, Gutstein was one of four former principals of Magna Technologies who used a variety of illegal means to drive up the price of the company’s stock in 1985 while reaping a total of more than $1 million in profits by selling their shares before the stock became essentially worthless. Magna Technologies never produced any products.

Earlier this month, Robert Victor, a Magna Technologies shareholder and a principal promoter of the company’s stock who pleaded guilty to four counts of securities and tax fraud in connection with the stock scheme, received a 2 1/2-year prison sentence and fines of $20,000. Herbert Stone, a New York stockbroker who pleaded guilty to 12 counts of conspiracy and securities and wire fraud for his role in Magna Technologies, has also received a 2 1/2-year sentence.

The alleged ringleader of the Magna Technologies fraud, Jacob Rubenstein, a former stockholder, remains at large.