William R Rohn
CIK 1193207 · View on SEC EDGAR ↗
Insider
First SEC filing: Sept. 1, 2005 · Latest: Sept. 1, 2005
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Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 29 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
29 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Nov. 17, 2004 | BIIB | S 10b5-1 | 1,000 | $58.30 | $58,300 | 65,462 Direct | -1.50% | Disposed | 269.9% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 1,700 | $58.29 | $99,093 | 66,462 Direct | -2.49% | Disposed | 270.0% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 200 | $58.21 | $11,642 | 68,162 Direct | -0.29% | Disposed | 270.5% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 4,800 | $58.20 | $279,360 | 68,362 Direct | -6.56% | Disposed | 270.5% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 2,000 | $58.19 | $116,380 | 73,162 Direct | -2.66% | Disposed | 270.6% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 1,800 | $58.18 | $104,724 | 75,162 Direct | -2.34% | Disposed | 270.7% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 5,400 | $58.17 | $314,118 | 76,962 Direct | -6.56% | Disposed | 270.7% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 14,300 | $58.16 | $831,688 | 82,362 Direct | -14.79% | Disposed | 270.8% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 300 | $58.15 | $17,445 | 96,662 Direct | -0.31% | Disposed | 270.9% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 100 | $58.13 | $5,813 | 96,962 Direct | -0.10% | Disposed | 271.0% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 1,500 | $58.12 | $87,180 | 96,762 Direct | -1.53% | Disposed | 271.0% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 1,400 | $58.11 | $81,354 | 98,262 Direct | -1.40% | Disposed | 271.1% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 6,300 | $58.10 | $366,030 | 99,662 Direct | -5.95% | Disposed | 271.2% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 5,100 | $58.09 | $296,259 | 105,962 Direct | -4.59% | Disposed | 271.2% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 2,000 | $58.08 | $116,160 | 111,062 Direct | -1.77% | Disposed | 271.3% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 2,700 | $58.07 | $156,789 | 113,062 Direct | -2.33% | Disposed | 271.4% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 2,100 | $58.06 | $121,926 | 115,762 Direct | -1.78% | Disposed | 271.4% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 6,700 | $58.05 | $388,935 | 117,862 Direct | -5.38% | Disposed | 271.5% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 100 | $58.04 | $5,804 | 124,562 Direct | -0.08% | Disposed | 271.6% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 3,000 | $58.03 | $174,090 | 124,662 Direct | -2.35% | Disposed | 271.6% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 1,900 | $58.02 | $110,238 | 127,662 Direct | -1.47% | Disposed | 271.7% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 2,600 | $58.01 | $150,826 | 129,562 Direct | -1.97% | Disposed | 271.7% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 2,000 | $58.00 | $116,000 | 132,162 Direct | -1.49% | Disposed | 271.8% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 2,100 | $57.97 | $121,737 | 134,162 Direct | -1.54% | Disposed | 272.0% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 1,200 | $57.94 | $69,528 | 136,262 Direct | -0.87% | Disposed | 272.2% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 1,900 | $57.93 | $110,067 | 137,462 Direct | -1.36% | Disposed | 272.3% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 500 | $57.92 | $28,960 | 139,362 Direct | -0.36% | Disposed | 272.3% (price as of 2026-08-21) |
| Nov. 17, 2004 | BIIB | S 10b5-1 | 300 | $57.91 | $17,373 | 139,862 Direct | -0.21% | Disposed | 272.4% (price as of 2026-08-21) |
| Aug. 31, 2004 | BIIB | S | 431 | $58.72 | $25,308 | 140,462 Direct | -0.31% | Disposed | 267.3% (price as of 2026-08-21) |
| Aug. 31, 2004 | BIIB | S | 400 | $58.71 | $23,484 | 140,893 Direct | -0.28% | Disposed | 267.3% (price as of 2026-08-21) |
| Aug. 31, 2004 | BIIB | S | 1,248 | $58.70 | $73,258 | 141,293 Direct | -0.88% | Disposed | 267.4% (price as of 2026-08-21) |
| Aug. 31, 2004 | BIIB | S | 900 | $58.69 | $52,821 | 142,541 Direct | -0.63% | Disposed | 267.4% (price as of 2026-08-21) |
| Aug. 31, 2004 | BIIB | S | 780 | $58.68 | $45,770 | 143,441 Direct | -0.54% | Disposed | 267.5% (price as of 2026-08-21) |
| Aug. 31, 2004 | BIIB | S | 1,600 | $58.67 | $93,872 | 144,221 Direct | -1.10% | Disposed | 267.6% (price as of 2026-08-21) |
| Aug. 31, 2004 | BIIB | S | 200 | $58.52 | $11,704 | 145,821 Direct | -0.14% | Disposed | 268.5% (price as of 2026-08-21) |
| Aug. 31, 2004 | BIIB | S | 2,494 | $58.51 | $145,924 | 146,021 Direct | -1.68% | Disposed | 268.6% (price as of 2026-08-21) |
| Aug. 31, 2004 | BIIB | S | 16,947 | $58.50 | $991,400 | 148,515 Direct | -10.24% | Disposed | 268.6% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 600 | $58.55 | $35,130 | 0 Direct | -100.00% | Disposed | 268.3% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 900 | $58.71 | $52,839 | 165,462 Direct | -0.54% | Disposed | 267.3% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 3,100 | $58.70 | $181,970 | 166,362 Direct | -1.83% | Disposed | 267.4% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 1,800 | $58.67 | $105,606 | 169,462 Direct | -1.05% | Disposed | 267.6% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 2,500 | $58.66 | $146,650 | 171,262 Direct | -1.44% | Disposed | 267.6% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 200 | $58.63 | $11,726 | 173,762 Direct | -0.11% | Disposed | 267.8% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 2,000 | $58.62 | $117,240 | 173,962 Direct | -1.14% | Disposed | 267.9% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 8,600 | $58.60 | $503,960 | 175,962 Direct | -4.66% | Disposed | 268.0% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 2,200 | $58.58 | $128,876 | 184,562 Direct | -1.18% | Disposed | 268.1% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 3,900 | $58.57 | $228,423 | 186,762 Direct | -2.05% | Disposed | 268.2% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 2,900 | $58.56 | $169,824 | 190,662 Direct | -1.50% | Disposed | 268.3% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 13,025 | $58.55 | $762,614 | 193,562 Direct | -6.30% | Disposed | 268.3% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 1,475 | $58.55 | $86,361 | 0 Direct | -100.00% | Disposed | 268.3% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 3,800 | $58.54 | $222,452 | 1,475 Direct | -72.04% | Disposed | 268.4% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 2,100 | $58.53 | $122,913 | 5,275 Direct | -28.47% | Disposed | 268.4% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 900 | $58.52 | $52,668 | 7,375 Direct | -10.88% | Disposed | 268.5% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 600 | $58.55 | $35,130 | 0 Direct | -100.00% | Disposed | 268.3% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 900 | $58.71 | $52,839 | 165,462 Direct | -0.54% | Disposed | 267.3% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 3,100 | $58.70 | $181,970 | 166,362 Direct | -1.83% | Disposed | 267.4% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 1,800 | $58.67 | $105,606 | 169,462 Direct | -1.05% | Disposed | 267.6% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 2,500 | $58.66 | $146,650 | 171,262 Direct | -1.44% | Disposed | 267.6% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 200 | $58.63 | $11,726 | 173,762 Direct | -0.11% | Disposed | 267.8% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 2,000 | $58.62 | $117,240 | 173,962 Direct | -1.14% | Disposed | 267.9% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 8,600 | $58.60 | $503,960 | 175,962 Direct | -4.66% | Disposed | 268.0% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 2,200 | $58.58 | $128,876 | 184,562 Direct | -1.18% | Disposed | 268.1% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 3,900 | $58.57 | $228,423 | 186,762 Direct | -2.05% | Disposed | 268.2% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 2,900 | $58.56 | $169,824 | 190,662 Direct | -1.50% | Disposed | 268.3% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 13,025 | $58.55 | $762,614 | 193,562 Direct | -6.30% | Disposed | 268.3% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 1,475 | $58.55 | $86,361 | 0 Direct | -100.00% | Disposed | 268.3% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 3,800 | $58.54 | $222,452 | 1,475 Direct | -72.04% | Disposed | 268.4% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 2,100 | $58.53 | $122,913 | 5,275 Direct | -28.47% | Disposed | 268.4% (price as of 2026-08-21) |
| Aug. 30, 2004 | BIIB | S | 900 | $58.52 | $52,668 | 7,375 Direct | -10.88% | Disposed | 268.5% (price as of 2026-08-21) |
| June 2, 2004 | BIIB | S 10b5-1 | 4,200 | $63.40 | $266,280 | 130,775 Direct | -3.11% | Disposed | 240.1% (price as of 2026-08-21) |
| June 2, 2004 | BIIB | S 10b5-1 | 5,300 | $63.39 | $335,967 | 134,975 Direct | -3.78% | Disposed | 240.2% (price as of 2026-08-21) |
Showing latest 100 of 371 transactions
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Jan. 3, 2011 | CERS | Option (Right to Buy) | Common Stock (15,000) | $2.48 | Jan. 2, 2021 | 15,000 | Acquired |
| Jan. 4, 2010 | CERS | Option (Right to Buy) | Common Stock (15,000) | $1.80 | Jan. 3, 2020 | 15,000 | Acquired |
| Jan. 12, 2009 | CERS | Option (Right to Buy) | Common Stock (37,500) | $0.79 | Jan. 11, 2019 | 37,500 | Acquired |
| Jan. 2, 2009 | CERS | Option (Right to Buy) | Common Stock (15,000) | $0.82 | Jan. 1, 2019 | 15,000 | Acquired |
| Jan. 2, 2008 | CERS | Option (Right to Buy) | Common Stock (15,000) | $6.51 | Jan. 1, 2018 | 15,000 | Acquired |
| Jan. 2, 2007 | CERS | Option (Right to Buy) | Common Stock (15,000) | $5.86 | Jan. 1, 2017 | 15,000 | Acquired |
| Jan. 3, 2006 | CERS | Option (Right to Buy) | Common Stock (15,000) | $10.15 | Jan. 2, 2016 | 15,000 | Acquired |
| Sept. 1, 2005 | CERS | Option (Right to Buy) | Common Stock (3,333) | $6.76 | Aug. 31, 2015 | 3,333 | Acquired |
| May 1, 2005 | CERS | Option (Right to Buy) | Common Stock (3,333) | $3.66 | April 29, 2015 | 3,333 | Acquired |
| Jan. 1, 2005 | CERS | Option (Right to Buy) | Common Stock (3,334) | $2.95 | Dec. 31, 2014 | 3,334 | Acquired |
| Nov. 17, 2004 | BIIB | Stock Option (right-to-buy) [F2] | Common Stock (75,000) | $6.92 | Feb. 5, 2008 | 75,000 | Disposed |
| Nov. 17, 2004 | BIIB | Stock Option (right-to-buy) [F2] | Common Stock (75,000) | $6.92 | Feb. 5, 2008 | 75,000 | Disposed |
| Sept. 1, 2004 | CERS | Option (Right to Buy) | Common Stock (3,333) | $2.14 | Aug. 31, 2014 | 3,333 | Acquired |
| Aug. 31, 2004 | BIIB | Stock Option (right-to-buy) [F1] | Common Stock (25,000) | $6.92 | Feb. 5, 2008 | 25,000 | Disposed |
| Aug. 30, 2004 | BIIB | Stock Option (right-to-buy) [F2] | Common Stock (600) | $6.31 | Nov. 19, 2007 | 600 | Disposed |
| Aug. 30, 2004 | BIIB | Stock Option (right-to-buy) [F2] | Common Stock (41,125) | $6.92 | Feb. 5, 2009 | 41,125 | Disposed |
| Aug. 30, 2004 | BIIB | Stock Option (right-to-buy) [F2] | Common Stock (8,275) | $6.19 | April 15, 2008 | 8,275 | Disposed |
| Aug. 30, 2004 | BIIB | Stock Option (right-to-buy) [F1] | Common Stock (600) | $6.31 | Nov. 19, 2007 | 600 | Disposed |
| Aug. 30, 2004 | BIIB | Stock Option (right-to-buy) [F1] | Common Stock (41,125) | $6.92 | Feb. 5, 2009 | 41,125 | Disposed |
| Aug. 30, 2004 | BIIB | Stock Option (right-to-buy) [F1] | Common Stock (8,275) | $6.19 | April 15, 2008 | 8,275 | Disposed |
| June 2, 2004 | BIIB | Stock Option (right-to-buy) [F2] | Common Stock (50,000) | $7.72 | Jan. 13, 2009 | 50,000 | Disposed |
| June 2, 2004 | BIIB | Stock Option (right-to-buy) [F2] | Common Stock (50,000) | $7.72 | Jan. 13, 2009 | 50,000 | Disposed |
| May 1, 2004 | CERS | Option (Right to Buy) | Common Stock (3,333) | $3.25 | April 30, 2014 | 3,333 | Acquired |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (1,000) | $6.19 | April 14, 2008 | 1,000 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (200) | $6.19 | April 14, 2008 | 200 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (17,900) | $6.19 | April 14, 2008 | 17,900 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (1,800) | $6.19 | April 14, 2008 | 1,800 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (1,700) | $6.19 | April 14, 2008 | 1,700 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (200) | $6.19 | April 14, 2008 | 200 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (5,200) | $6.19 | April 14, 2008 | 5,200 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (8,000) | $6.19 | April 14, 2008 | 8,000 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (4,300) | $6.19 | April 14, 2008 | 4,300 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (200) | $6.19 | April 14, 2008 | 200 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (500) | $6.19 | April 14, 2008 | 500 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (200) | $6.19 | April 14, 2008 | 200 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (200) | $6.19 | April 14, 2008 | 200 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (500) | $6.19 | April 14, 2008 | 500 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (9,800) | $6.19 | April 14, 2008 | 9,800 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (300) | $6.19 | April 14, 2008 | 300 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (600) | $6.19 | April 14, 2008 | 600 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (200) | $6.19 | April 14, 2008 | 200 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (500) | $6.19 | April 14, 2008 | 500 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (2,400) | $6.19 | April 14, 2008 | 2,400 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (300) | $6.19 | April 14, 2008 | 300 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (200) | $6.19 | April 14, 2008 | 200 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (400) | $6.19 | April 14, 2008 | 400 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (1,500) | $6.19 | April 14, 2008 | 1,500 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (200) | $6.19 | April 14, 2008 | 200 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (1,100) | $6.19 | April 14, 2008 | 1,100 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (4,600) | $6.19 | April 14, 2008 | 4,600 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (800) | $6.19 | April 14, 2008 | 800 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (200) | $6.19 | April 14, 2008 | 200 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (2,200) | $7.72 | Jan. 12, 2009 | 2,200 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (500) | $7.72 | Jan. 12, 2009 | 500 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (400) | $7.72 | Jan. 12, 2009 | 400 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (200) | $7.72 | Jan. 12, 2009 | 200 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (200) | $7.72 | Jan. 12, 2009 | 200 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (11,500) | $7.72 | Jan. 12, 2009 | 11,500 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (6,700) | $7.72 | Jan. 12, 2009 | 6,700 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (200) | $7.72 | Jan. 12, 2009 | 200 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (500) | $7.72 | Jan. 12, 2009 | 500 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (700) | $7.72 | Jan. 12, 2009 | 700 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (1,600) | $7.72 | Jan. 12, 2009 | 1,600 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (200) | $7.72 | Jan. 12, 2009 | 200 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (400) | $7.72 | Jan. 12, 2009 | 400 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (100) | $7.72 | Jan. 12, 2009 | 100 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (3,700) | $7.72 | Jan. 12, 2009 | 3,700 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (2,300) | $7.72 | Jan. 12, 2009 | 2,300 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (5,000) | $7.72 | Jan. 12, 2009 | 5,000 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (5,200) | $7.72 | Jan. 12, 2009 | 5,200 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (700) | $7.72 | Jan. 12, 2009 | 700 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (1,300) | $7.72 | Jan. 12, 2009 | 1,300 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (4,900) | $7.72 | Jan. 12, 2009 | 4,900 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (6,600) | $7.72 | Jan. 12, 2009 | 6,600 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (200) | $7.72 | Jan. 12, 2009 | 200 | Disposed |
| March 2, 2004 | BIIB | Incentive Stock Option (right to buy) [F1] | Common Stock (4,700) | $7.72 | Jan. 12, 2009 | 4,700 | Disposed |
| Feb. 18, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (500) | $6.19 | April 14, 2008 | 500 | Disposed |
| Feb. 18, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (1,500) | $6.19 | April 14, 2008 | 1,500 | Disposed |
| Feb. 18, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (500) | $6.19 | April 14, 2008 | 500 | Disposed |
| Feb. 18, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (4,400) | $6.19 | April 14, 2008 | 4,400 | Disposed |
| Feb. 18, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (18,100) | $6.19 | April 14, 2008 | 18,100 | Disposed |
| Feb. 6, 2004 | BIIB | NQ Stock Option (right to buy) | Common Stock (58,875) | $43.50 | Feb. 6, 2014 | 58,875 | Acquired |
| Jan. 21, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (400) | $6.19 | April 14, 2008 | 400 | Disposed |
| Jan. 21, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (200) | $6.19 | April 14, 2008 | 200 | Disposed |
| Jan. 21, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (1,700) | $6.19 | April 14, 2008 | 1,700 | Disposed |
| Jan. 21, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (470) | $6.19 | April 14, 2008 | 470 | Disposed |
| Jan. 21, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (2,170) | $6.19 | April 14, 2008 | 2,170 | Disposed |
| Jan. 21, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (7,360) | $6.19 | April 14, 2008 | 7,360 | Disposed |
| Jan. 21, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (500) | $6.19 | April 14, 2008 | 500 | Disposed |
| Jan. 21, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (12,200) | $6.19 | April 14, 2008 | 12,200 | Disposed |
| Jan. 7, 2004 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (25,000) | $6.19 | April 14, 2008 | 25,000 | Disposed |
| Jan. 1, 2004 | CERS | Common Stock | Common Stock (3,334) | $4.54 | Dec. 31, 2013 | 3,334 | Acquired |
| Dec. 2, 2003 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (50,000) | $6.19 | April 14, 2008 | 50,000 | Disposed |
| Oct. 3, 2003 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (10,000) | $6.19 | April 14, 2008 | 10,000 | Disposed |
| Sept. 17, 2003 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (10,000) | $6.19 | April 14, 2008 | 10,000 | Disposed |
| Sept. 8, 2003 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (10,000) | $6.19 | April 14, 2008 | 10,000 | Disposed |
| Sept. 2, 2003 | BIIB | Incentive Stock Option (right to buy) [F2] | Common Stock (20,000) | $6.19 | April 14, 2008 | 20,000 | Disposed |
| Sept. 1, 2003 | CERS | Option (Right to buy) | Common Stock (2,602) | $7.62 | Aug. 31, 2013 | 2,602 | Acquired |
| Aug. 28, 2003 | BIIB | Incentive Stock Option (right to buy) [F3] | Common Stock (5,438) | $6.19 | April 14, 2008 | 5,438 | Disposed |
| Aug. 28, 2003 | BIIB | Incentive Stock Option (right to buy) [F3] | Common Stock (4,725) | $7.72 | Jan. 12, 2009 | 4,725 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).