Schwab Institutional, the biggest custodian of client assets from independent advisors, posted several milestones in the third week in April. On April 21, the unit of Charles Schwab & Co. announced that it had passed the $300 billion mark in assets custodied by its 5,000 affiliated advisors. The exact figure was $303.5 billion as of the end of 2004′s first quarter, held through 1.2 million client accounts, the company said. The 325 advisors who are members of the Schwab Advisor Network, the company’s select referral program, accounted for $9.48 billion of those assets as of March 31, 2004, representing a 20% increase from the end of 2003 alone. The $300 billion represents 30% of total assets at Charles Schwab & Co.