| 29 sept. 2011 | TENDER | BUREAU OF NATIONAL AFFAIRS INC | 11 683 | 39.50 USD | |
| 29 sept. 2011 | TENDER | BUREAU OF NATIONAL AFFAIRS INC | 15 496 | 39.50 USD | |
| 19 mars 2011 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 820 | 17.50 USD | |
| 20 mars 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 518 | 16.00 USD | |
| 01 avr. 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 184 | 16.00 USD | |
| 26 juil. 2010 | OTHER | BUREAU OF NATIONAL AFFAIRS INC | 87 | 16.00 USD | |
| 30 sept. 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 204 | 16.50 USD | |
| 18 sept. 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 500 | 16.50 USD | |
| 18 sept. 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 788 | 16.50 USD | |
| 20 mars 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 793 | 16.00 USD | |
| 02 avr. 2009 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 161 | 15.75 USD | |
| 01 oct. 2009 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 178 | 15.75 USD | |
| 21 mars 2009 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 463 | 15.75 USD | |
| 19 sept. 2009 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 470 | 15.75 USD | |
| 19 sept. 2009 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 578 | 15.75 USD | |
| 21 mars 2009 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 1 213 | 15.75 USD | |
| 02 avr. 2008 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 151 | 15.50 USD | |
| 15 mars 2008 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 337 | 15.50 USD | |
| 02 oct. 2008 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 153 | 15.75 USD | |
| 18 juin 2008 | OTHER | BUREAU OF NATIONAL AFFAIRS INC | 51 | 15.50 USD | |
| 20 sept. 2008 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 333 | 15.75 USD | |
| 20 sept. 2008 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 1 203 | 15.75 USD | |
| 15 mars 2008 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 1 034 | 15.50 USD | |
| 15 sept. 2007 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 362 | 14.75 USD | |
| 17 mars 2007 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 164 | 14.00 USD | |