| 29 sept. 2011 | TENDER | BUREAU OF NATIONAL AFFAIRS INC | 31 144 | 39.50 USD | |
| 29 sept. 2011 | TENDER | BUREAU OF NATIONAL AFFAIRS INC | 33 259 | 39.50 USD | |
| 19 mars 2011 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 74 | 17.50 USD | |
| 20 mars 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 623 | 16.00 USD | |
| 30 sept. 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 415 | 16.50 USD | |
| 26 juil. 2010 | OTHER | BUREAU OF NATIONAL AFFAIRS INC | 87 | 16.00 USD | |
| 01 avr. 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 378 | 16.00 USD | |
| 18 sept. 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 732 | 16.50 USD | |
| 18 sept. 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 79 | 16.50 USD | |
| 20 mars 2010 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 81 | 16.00 USD | |
| 21 mars 2009 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 690 | 15.75 USD | |
| 01 oct. 2009 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 370 | 15.75 USD | |
| 19 sept. 2009 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 772 | 15.75 USD | |
| 02 avr. 2009 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 338 | 15.75 USD | |
| 19 sept. 2009 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 82 | 15.75 USD | |
| 21 mars 2009 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 83 | 15.75 USD | |
| 20 sept. 2008 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 559 | 15.75 USD | |
| 02 oct. 2008 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 325 | 15.75 USD | |
| 15 mars 2008 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 311 | 15.50 USD | |
| 18 juin 2008 | OTHER | BUREAU OF NATIONAL AFFAIRS INC | 51 | 15.50 USD | |
| 02 avr. 2008 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 319 | 15.50 USD | |
| 20 sept. 2008 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 82 | 15.75 USD | |
| 15 mars 2008 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 58 | 15.50 USD | |
| 15 sept. 2007 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 753 | 14.75 USD | |
| 17 mars 2007 | PURCHASE | BUREAU OF NATIONAL AFFAIRS INC | 228 | 14.00 USD | |