Charles Schwab Expands Stake in AMERISAFE Charles Schwab Investment Management has increased its stake in AMERISAFE by 3.4%, purchasing 21,799 additional shares in the fourth quarter. The firm now holds 661,795 shares, representing 3.47% of the company’s stock, valued at $34.1 million. AMERISAFE operates as a workers' compensation insurer specializing in hazardous industries.1