**RWWM Inc. Purchases $3.98 Million Stake in Costco Wholesale Corporation**
RWWM Inc. reported a new investment in Costco Wholesale Corporation during the third quarter, as detailed in its latest 13F filing with the Securities and Exchange Commission (SEC). The firm acquired 4,302 shares of Costco stock, with a total value near $3.98 million. This purchase represents approximately 0.3% of RWWM …