Roxbury Partners Raises Stake in ATI Medical

Roxbury Partners, a Washington investment group, said it raised its stake in ATI Medical Inc. to 10.6% from 9.3%.

Roxbury, whose general partners are Christopher Middendorf and Jonathan Bowers, said it paid from $9.125 to $10.375 for its additional shares in the Glendale-based, medical equipment rental company.