| 29 sept. 2011 | TENDER | BUREAU OF NATIONAL AFFAIRS INC | 2 155 | 39.50 USD | |
| 29 sept. 2011 | TENDER | BUREAU OF NATIONAL AFFAIRS INC | 11 386 | 39.50 USD | |
| 19 mars 2011 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 685 | 17.50 USD | |
| 30 sept. 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 24 | 16.50 USD | |
| 18 sept. 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 394 | 16.50 USD | |
| 01 avr. 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 17 | 16.00 USD | |
| 20 mars 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 409 | 16.00 USD | |
| 18 sept. 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 1 212 | 16.50 USD | |
| 18 sept. 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 1 212 | 16.50 USD | |
| 20 mars 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 2 188 | 16.00 USD | |
| 01 oct. 2009 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 12 | 15.75 USD | |
| 21 mars 2009 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 479 | 15.75 USD | |
| 02 avr. 2009 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 6 | 15.75 USD | |
| 19 sept. 2009 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 415 | 15.75 USD | |
| 19 sept. 2009 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 2 222 | 15.75 USD | |
| 21 mars 2009 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 3 175 | 15.75 USD | |
| 20 sept. 2008 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 1 904 | 15.75 USD | |