| 2/26/2014 | BKIG | Moody's upgrades Biogen to Baa1
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| 4/17/2013 | BKIG | S&P lifts Biogen Idec
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| 3/28/2013 | BKIG | Moody's lifts Biogen Idec view to positive
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| 3/19/2012 | IG | Moody's ups Biogen to Baa2
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| 8/16/2011 | IG | Moody's ups Biogen to positive
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| 11/3/2010 | IG | Moody's: Biogen Idec unchanged
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| 12/4/2008 | IG | S&P lifts Biogen
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| 9/29/2008 | IG | S&P: Biogen on positive watch
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| 2/28/2008 | IG | New Issue: Biogen prices $1 billion of notes in five-, 10-year tranches
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| 2/28/2008 | IG | Market Commentary: Archer Daniels, Colonial BancGroup, Hartford, Biogen price; negative headlines end micro-rally
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| 2/27/2008 | IG | Market Commentary: Citi, Avon, Clorox, Computer Sciences, Allstate price; Colonial Bank plans issue; Biogen issue hits snag
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| 2/26/2008 | IG | Market Commentary: McDonald's, Honeywell, PG&E, ING, SunTrust, KfW, UST, Fifth Third price; jammed calendar ahead
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| 2/26/2008 | IG | Biogen Idec to offer five-, 10-year notes; pricing likely Wednesday
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| 2/26/2008 | IG | Biogen files automatic shelf
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| 2/26/2008 | IG | S&P rates Biogen Idec notes BBB
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| 2/26/2008 | IG | Moody's gives Biogen Idec note Baa3
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