| BIIB | | BIOGEN IDEC INC. | Paul J. Clancy | Executive VP and CFO | Feb 23, 2011 | Tax Payment (Shares) | $66.76 | 1,119 | 74,704 | 46,711 | Feb 25, 2011, 03:55 PM |
| BIIB | | BIOGEN IDEC INC. | Paul J. Clancy | Executive VP and CFO | Feb 23, 2011 | Option/RSU Exercise | - | 3,521 | - | 47,618 | Feb 25, 2011, 03:55 PM |
| BIIB | | BIOGEN IDEC INC. | Robert E. Gagnon | Chief Acct Officer VP & Contr | Feb 24, 2011 | Option/RSU Exercise | $49.65 | 1,054 | 52,331 | 12,277 | Feb 25, 2011, 03:54 PM |
| BIIB | | BIOGEN IDEC INC. | Robert E. Gagnon | Chief Acct Officer VP & Contr | Feb 24, 2011 | Sale | $66.99 | 1,054 | 70,606 | 11,223 | Feb 25, 2011, 03:54 PM |
| BIIB | | BIOGEN IDEC INC. | Robert E. Gagnon | Chief Acct Officer VP & Contr | Feb 23, 2011 | Tax Payment (Shares) | $66.76 | 320 | 21,363 | 11,284 | Feb 25, 2011, 03:54 PM |
| BIIB | | BIOGEN IDEC INC. | Robert E. Gagnon | Chief Acct Officer VP & Contr | Feb 23, 2011 | Option/RSU Exercise | - | 1,006 | - | 11,543 | Feb 25, 2011, 03:54 PM |
| BIIB | | BIOGEN IDEC INC. | Craig Eric Schneier | EVP, HR, Public Affairs & Comm | Feb 25, 2011 | Sale | $68.20 | 9,725 | 663,245 | 19,868 | Feb 25, 2011, 03:53 PM |
| BIIB | | BIOGEN IDEC INC. | Craig Eric Schneier | EVP, HR, Public Affairs & Comm | Feb 23, 2011 | Tax Payment (Shares) | $66.76 | 1,598 | 106,682 | 20,171 | Feb 25, 2011, 03:53 PM |
| BIIB | | BIOGEN IDEC INC. | Craig Eric Schneier | EVP, HR, Public Affairs & Comm | Feb 23, 2011 | Option/RSU Exercise | - | 5,030 | - | 21,466 | Feb 25, 2011, 03:53 PM |
| BIIB | | BIOGEN IDEC INC. | Craig Eric Schneier | EVP, HR, Public Affairs & Comm | Feb 25, 2011 | Option/RSU Exercise | $49.31 | 9,725 | 479,540 | 29,593 | Feb 25, 2011, 03:53 PM |
| BIIB | | BIOGEN IDEC INC. | Susan H. Alexander | EVP, General Counsel | Feb 23, 2011 | Tax Payment (Shares) | $66.76 | 999 | 66,693 | 42,128 | Feb 25, 2011, 03:51 PM |
| BIIB | | BIOGEN IDEC INC. | Susan H. Alexander | EVP, General Counsel | Feb 23, 2011 | Option/RSU Exercise | - | 3,144 | - | 42,937 | Feb 25, 2011, 03:51 PM |
| BIIB | | BIOGEN IDEC INC. | Robert E. Gagnon | Chief Acct Officer VP & Contr | Feb 17, 2011 | Sale | $67.10 | 732 | 49,115 | 10,537 | Feb 18, 2011, 03:09 PM |
| BIIB | | BIOGEN IDEC INC. | Craig Eric Schneier | EVP, HR, Public Affairs & Comm | Feb 17, 2011 | Sale | $67.08 | 3,194 | 214,242 | 16,436 | Feb 18, 2011, 03:07 PM |
| BIIB | | BIOGEN IDEC INC. | John Cox | EVP Pharmaceutical Oper & Tech | Feb 17, 2011 | Sale | $67.08 | 1,843 | 123,620 | 13,603 | Feb 18, 2011, 03:06 PM |
| BIIB | | BIOGEN IDEC INC. | Craig Eric Schneier | EVP, HR, Public Affairs & Comm | Feb 12, 2011 | Tax Payment (Shares) | $65.83 | 1,486 | 97,823 | 19,630 | Feb 15, 2011, 02:31 PM |
| BIIB | | BIOGEN IDEC INC. | Robert E. Gagnon | Chief Acct Officer VP & Contr | Feb 12, 2011 | Tax Payment (Shares) | $65.83 | 341 | 22,448 | 11,269 | Feb 15, 2011, 02:29 PM |
| BIIB | | BIOGEN IDEC INC. | John Cox | EVP Pharmaceutical Oper & Tech | Feb 12, 2011 | Tax Payment (Shares) | $65.83 | 910 | 59,905 | 15,446 | Feb 15, 2011, 02:27 PM |
| BIIB | | BIOGEN IDEC INC. | Paul J. Clancy | Executive VP and CFO | Feb 12, 2011 | Tax Payment (Shares) | $65.83 | 1,686 | 110,989 | 44,097 | Feb 15, 2011, 02:26 PM |
| BIIB | | BIOGEN IDEC INC. | Susan H. Alexander | EVP, General Counsel | Feb 12, 2011 | Tax Payment (Shares) | $65.83 | 1,515 | 99,732 | 39,793 | Feb 15, 2011, 02:24 PM |
| BIIB | | BIOGEN IDEC INC. | Granata Frances co | EVP Global Commercial Operatio | Feb 01, 2011 | Tax Payment (Shares) | $65.49 | 1,385 | 90,704 | 3,162 | Feb 03, 2011, 05:14 PM |
| BIIB | | BIOGEN IDEC INC. | Granata Frances co | EVP Global Commercial Operatio | Feb 01, 2011 | Option/RSU Exercise | - | 4,286 | - | 4,286 | Feb 03, 2011, 05:14 PM |
| BIIB | | BIOGEN IDEC INC. | Craig Eric Schneier | EVP, HR, Public Affairs & Comm | Jan 20, 2011 | Option/RSU Exercise | $49.65 | 6,250 | 310,313 | 27,366 | Jan 24, 2011, 02:59 PM |
| BIIB | | BIOGEN IDEC INC. | Craig Eric Schneier | EVP, HR, Public Affairs & Comm | Jan 20, 2011 | Sale | $68.62 | 6,250 | 428,875 | 21,116 | Jan 24, 2011, 02:59 PM |
| BIIB | | BIOGEN IDEC INC. | Robert E. Gagnon | Chief Acct Officer VP & Contr | Jan 04, 2011 | Option/RSU Exercise | $46.07 | 4,307 | 198,415 | 12,514 | Jan 05, 2011, 02:45 PM |
| BIIB | | BIOGEN IDEC INC. | Robert E. Gagnon | Chief Acct Officer VP & Contr | Jan 04, 2011 | Sale | $66.57 | 5,103 | 339,690 | 10,814 | Jan 05, 2011, 02:45 PM |
| BIIB | | BIOGEN IDEC INC. | William Young | Director | Dec 31, 2010 | Option/RSU Exercise | $59.25 | 15,000 | 888,750 | 34,315 | Jan 04, 2011, 03:58 PM |
| BIIB | | BIOGEN IDEC INC. | William Young | Director | Dec 31, 2010 | Tax Payment (Shares) | $67.05 | 13,256 | 888,815 | 21,059 | Jan 04, 2011, 03:58 PM |
| BIIB | | BIOGEN IDEC INC. | Lynn Schenk | Director | Dec 30, 2010 | Option/RSU Exercise | $59.25 | 15,000 | 888,750 | 22,980 | Jan 03, 2011, 09:57 AM |
| BIIB | | BIOGEN IDEC INC. | Lynn Schenk | Director | Dec 30, 2010 | Sale | $66.80 | 15,000 | 1,001,988 | 7,980 | Jan 03, 2011, 09:57 AM |
| BIIB | | BIOGEN IDEC INC. | Craig Eric Schneier | EVP, HR, Public Affairs & Comm | Dec 17, 2010 | Option/RSU Exercise | $49.31 | 19,450 | 959,080 | 40,566 | Dec 21, 2010, 03:32 PM |
| BIIB | | BIOGEN IDEC INC. | Craig Eric Schneier | EVP, HR, Public Affairs & Comm | Dec 17, 2010 | Sale | $68.20 | 19,450 | 1,326,490 | 21,116 | Dec 21, 2010, 03:32 PM |
| BIIB | | BIOGEN IDEC INC. | Robert E. Gagnon | Chief Acct Officer VP & Contr | Dec 06, 2010 | Sale | $66.53 | 796 | 52,957 | 11,610 | Dec 07, 2010, 05:14 PM |
| BIIB | | BIOGEN IDEC INC. | Craig Eric Schneier | EVP, HR, Public Affairs & Comm | Dec 03, 2010 | Option/RSU Exercise | $44.24 | 1,907 | 84,366 | 23,023 | Dec 07, 2010, 05:13 PM |
| BIIB | | BIOGEN IDEC INC. | Craig Eric Schneier | EVP, HR, Public Affairs & Comm | Dec 03, 2010 | Sale | $67.20 | 1,907 | 128,150 | 21,116 | Dec 07, 2010, 05:13 PM |
| BIIB | | BIOGEN IDEC INC. | Craig Eric Schneier | EVP, HR, Public Affairs & Comm | Dec 07, 2010 | Option/RSU Exercise | $44.24 | 28,093 | 1,242,834 | 49,209 | Dec 07, 2010, 05:13 PM |
| BIIB | | BIOGEN IDEC INC. | Craig Eric Schneier | EVP, HR, Public Affairs & Comm | Dec 07, 2010 | Sale | $67.20 | 28,093 | 1,887,850 | 21,116 | Dec 07, 2010, 05:13 PM |
| BIIB | | BIOGEN IDEC INC. | Robert E. Gagnon | Chief Acct Officer VP & Contr | Dec 01, 2010 | Tax Payment (Shares) | $65.37 | 371 | 24,252 | 12,406 | Dec 03, 2010, 01:46 PM |
| BIIB | | BIOGEN IDEC INC. | John Cox | EVP Pharmaceutical Oper & Tech | Nov 09, 2010 | Sale | $62.87 | 773 | 48,597 | 16,356 | Nov 10, 2010, 02:21 PM |
| BIIB | | BIOGEN IDEC INC. | John Cox | EVP Pharmaceutical Oper & Tech | Nov 09, 2010 | Sale | $62.87 | 773 | 48,597 | 16,356 | Nov 10, 2010, 02:21 PM |
| BIIB | | BIOGEN IDEC INC. | John Cox | EVP Pharmaceutical Oper & Tech | Nov 01, 2010 | Tax Payment (Shares) | $62.55 | 360 | 22,518 | 17,894 | Nov 03, 2010, 01:50 PM |
| BIIB | | BIOGEN IDEC INC. | John Cox | EVP Pharmaceutical Oper & Tech | Nov 02, 2010 | Sale | $63.04 | 765 | 48,228 | 17,129 | Nov 03, 2010, 01:50 PM |
| BIIB | | BIOGEN IDEC INC. | John Cox | EVP Pharmaceutical Oper & Tech | Nov 02, 2010 | Sale | $63.04 | 765 | 48,228 | 17,129 | Nov 03, 2010, 01:50 PM |
| BIIB | | BIOGEN IDEC INC. | John Cox | EVP Pharmaceutical Oper & Tech | Nov 01, 2010 | Tax Payment (Shares) | $62.55 | 360 | 22,518 | 17,894 | Nov 03, 2010, 01:50 PM |
| BIIB | | BIOGEN IDEC INC. | Robert W. Pangia | Director | Oct 28, 2010 | Option/RSU Exercise | $59.25 | 15,000 | 888,750 | 29,080 | Oct 29, 2010, 02:27 PM |
| BIIB | | BIOGEN IDEC INC. | Robert W. Pangia | Director | Oct 28, 2010 | Sale | $64.00 | 15,000 | 960,000 | 14,080 | Oct 29, 2010, 02:27 PM |
| BIIB | | BIOGEN IDEC INC. | John Cox | EVP Pharmaceutical Oper & Tech | Oct 28, 2010 | Option/RSU Exercise | $33.97 | 6,900 | 234,393 | 25,154 | Oct 29, 2010, 02:25 PM |
| BIIB | | BIOGEN IDEC INC. | John Cox | EVP Pharmaceutical Oper & Tech | Oct 28, 2010 | Sale | $63.00 | 6,900 | 434,700 | 18,254 | Oct 29, 2010, 02:25 PM |
| BIIB | | BIOGEN IDEC INC. | John Cox | EVP Pharmaceutical Oper & Tech | Oct 28, 2010 | Option/RSU Exercise | $33.97 | 6,900 | 234,393 | 25,154 | Oct 29, 2010, 02:25 PM |
| BIIB | | BIOGEN IDEC INC. | John Cox | EVP Pharmaceutical Oper & Tech | Oct 28, 2010 | Sale | $63.00 | 6,900 | 434,700 | 18,254 | Oct 29, 2010, 02:25 PM |
| BIIB | | BIOGEN IDEC INC. | Michael F. Maclean | SVP, Chief Accounting Officer | Oct 01, 2010 | Tax Payment (Shares) | $56.53 | 953 | 53,873 | 10,681 | Oct 04, 2010, 04:14 PM |
| BIIB | | BIOGEN IDEC INC. | Paul J. Clancy | Executive VP and CFO | Sep 04, 2010 | Tax Payment (Shares) | $56.24 | 1,114 | 62,651 | 45,783 | Sep 07, 2010, 04:05 PM |
| BIIB | | BIOGEN IDEC INC. | Caroline Dorsa | Director | Aug 13, 2010 | Buy | $56.41 | 177 | 9,985 | 8,243 | Aug 17, 2010, 04:35 PM |
| BIIB | | BIOGEN IDEC INC. | Michael F. Maclean | SVP, Chief Accounting Officer | Aug 02, 2010 | Sale | $56.85 | 9,542 | 542,457 | 20,494 | Aug 03, 2010, 04:03 PM |
| BIIB | | BIOGEN IDEC INC. | Michael F. Maclean | SVP, Chief Accounting Officer | Aug 02, 2010 | Sale | $56.85 | 9,542 | 542,457 | 20,494 | Aug 03, 2010, 04:03 PM |
| BIIB | | BIOGEN IDEC INC. | Paul J. Clancy | Executive VP and CFO | Aug 01, 2010 | Tax Payment (Shares) | $55.88 | 835 | 46,660 | 46,897 | Aug 03, 2010, 04:01 PM |
| BIIB | | BIOGEN IDEC INC. | Susan H. Alexander | EVP, General Counsel | Aug 01, 2010 | Tax Payment (Shares) | $55.88 | 835 | 46,660 | 41,308 | Aug 03, 2010, 04:00 PM |
| BIIB | | BIOGEN IDEC INC. | Caroline Dorsa | Director | Jul 30, 2010 | Buy | $54.57 | 183 | 9,986 | 8,066 | Aug 03, 2010, 03:58 PM |