Ownership History
| PREHN, WALTER LAWRENCE, III | $350,000 | 2016 | 0/0 | 12/20/2016 | 160009899 |
| KOPP, GEORGE P., JR., TRUSTEE | $0 | 2009 | 0/0 | 08/27/2009 | 090009183 |
| KOPP, JANET THOMPSON | $0 | 0 | 0/0 | 01/01/1961 | 000000000 |
| KOPP, JANET THOMPSON | $10,000 | 0 | 383/262 | 01/01/1951 | 000000000 |
| SHULTZ, JANET THOMPSON | $0 | 0 | 383/262 | 01/01/1951 | 000000000 |