Graham Holdings Co is required to file a 13D/G report to the SEC when the ownership of a company's total stock issue exceeds 5%.
| Filed | Shares | Percentage | |
|---|---|---|---|
| COLUMBUS MCKINNON CORP | February 01, 2016 | 1,776,185 | 8.8% |
| SmartPros Ltd. | November 02, 2015 | 1,428,094 | 29.9% |
| CORINTHIAN COLLEGES INC | March 19, 2014 | 4,123,513 | 4.7% |
| CORINTHIAN COLLEGES INC | February 15, 2008 | 6,885,000 | 8.1% |