| SC 13G/A | 2013-02-14 | Delaware Management Holdings, Inc. | K12 INC | 5,368,580 | 14.5% | EDGAR |
| SC 13G/A | 2013-02-14 | DELAWARE MANAGEMENT BUSINESS TRUST | K12 INC | 5,368,580 | 14.5% | EDGAR |
| SC 13G | 2013-02-14 | FMR LLC | K12 INC | 2,070,312 | 5.6% | EDGAR |
| SC 13G | 2013-02-14 | FRONTIER CAPITAL MANAGEMENT CO LLC | K12 INC | 2,730,396 | 7.4% | EDGAR |
| SC 13G/A | 2013-02-08 | PRICE T ROWE ASSOCIATES INC /MD/ | K12 INC | - | 0.0% | EDGAR |
| SC 13G/A | 2013-02-04 | BLAIR WILLIAM & CO/IL | K12 INC | 4,676,172 | 12.7% | EDGAR |
| SC 13G/A | 2012-03-09 | BLAIR WILLIAM & CO/IL | K12 INC | 3,773,927 | 10.4% | EDGAR |
| SC 13G/A | 2012-02-10 | PRICE T ROWE ASSOCIATES INC /MD/ | K12 INC | 2,541,712 | 7.0% | EDGAR |
| SC 13G/A | 2012-02-10 | MACQUARIE GROUP LTD | K12 INC | 4,818,803 | 13.3% | EDGAR |
| SC 13G/A | 2012-02-10 | DELAWARE MANAGEMENT BUSINESS TRUST | K12 INC | 4,818,803 | 13.3% | EDGAR |
| SC 13G/A | 2012-02-10 | Delaware Management Holdings, Inc. | K12 INC | 4,818,803 | 13.3% | EDGAR |
| SC 13G/A | 2012-02-10 | MACQUARIE BANK LTD | K12 INC | 4,818,803 | 13.3% | EDGAR |
| SC 13G/A | 2012-01-30 | BLAIR WILLIAM & CO/IL | K12 INC | 2,477,488 | 6.8% | EDGAR |
| SC 13G | 2012-01-10 | MACQUARIE GROUP LTD | K12 INC | 4,818,803 | 13.2% | EDGAR |
| SC 13G | 2012-01-10 | MACQUARIE BANK LTD | K12 INC | 4,818,803 | 13.2% | EDGAR |
| SC 13G | 2012-01-10 | Delaware Management Holdings, Inc. | K12 INC | 4,818,803 | 13.2% | EDGAR |
| SC 13G | 2012-01-10 | DELAWARE MANAGEMENT BUSINESS TRUST | K12 INC | 4,818,803 | 13.2% | EDGAR |
| SC 13D | 2011-05-02 | TCV VII LP | K12 INC | 2,617,727 | 7.4% | EDGAR |
| SC 13D/A | 2011-03-01 | LEARNING GROUP LLC | K12 INC | 4,665,083 | 14.9% | EDGAR |
| SC 13G/A | 2011-02-10 | PRICE T ROWE ASSOCIATES INC /MD/ | K12 INC | 2,041,186 | 6.5% | EDGAR |