PALO ALTO, CA - APRIL 21: San Francisco Mayor Gavin Newsom (L) and his wife Jennifer Siebel speak to reporters following a visit to the Facebook headquarters April 21, 2009 in Palo Alto, California. San Francisco Mayor Gavin Newsom, a Democrat, announced today in a Twitter message that he is officially running for governor of California. (Photo by Justin Sullivan/Getty Images)
The investment was made, according to a recently filed economic disclosure statement obtained by the paper, by Siebel-Newsom's trust. The filing shows the Transocean transaction was made just a couple months after Siebel turned 35 and took control of trust.
It wasn't clear the exact amount of money invested in Transocean, but it was somewhere between $10,000 and $100,000.