BIIB Stock Balance Sheets

Biogen Quarterly Balance Sheets Chart

Quarterly

Annual

Goodwill

Account Receivables

Cash and Cash Eq

Account Payables

Inventory

Biogen Quarterly Balance Sheets Table

Quarterly

Annual

Unit: USD	2025-06-30	2025-03-31	2024-12-31	2024-09-30	2024-06-30	2024-03-31	2023-12-31	2023-09-30	2023-06-30	2023-03-31	2022-12-31	2022-09-30	2022-06-30	2022-03-31	2021-09-30	2021-06-30	2021-03-31	2020-09-30	2020-06-30	2020-03-31	2019-09-30	2019-06-30	2019-03-31	2018-09-30	2018-06-30	2018-03-31	2017-09-30	2017-06-30	2017-03-31	2016-12-31	2016-09-30	2016-06-30	2016-03-31	2015-12-31	2015-09-30	2015-06-30	2015-03-31	2014-12-31	2014-09-30	2014-06-30	2014-03-31	2013-12-31	2013-09-30	2013-06-30	2013-03-31	2013-02-05	2012-12-31	2012-09-30	2012-06-30	2012-03-31	2011-12-31	2011-09-30	2011-06-30	2011-03-31	2010-12-31	2010-09-30	2010-06-30	2010-03-31	2009-12-31	2009-09-30	2009-06-30	2009-03-31	2008-12-31	2008-09-30	2008-06-30	2008-03-31	2007-12-31	2007-09-30	2007-06-30	2007-03-31	2006-12-31	2006-09-30	2006-06-30	2006-03-31	2005-12-31	2005-09-30	2005-06-30	2005-03-31	2004-12-31

assets
current assets:
cash and cash equivalents	2,758,800,000	2,598,300,000	2,375,000,000	1,699,200,000	1,908,900,000	1,074,400,000	1,049,900,000	2,287,900,000	2,617,800,000	2,898,200,000	3,419,300,000	3,675,600,000	2,646,600,000	1,749,300,000	1,541,800,000	1,742,000,000	1,217,500,000	2,224,800,000	2,384,900,000	2,591,300,000	2,343,900,000	1,723,400,000	2,243,200,000	2,386,700,000	1,250,200,000	4,108,000,000	1,548,100,000	1,169,500,000	924,000,000	2,326,500,000	2,084,800,000	1,362,000,000	1,130,700,000	1,308,000,000	4,089,003,000	1,282,078,000	1,478,051,000	1,204,924,000	1,186,281,000	863,197,000	828,601,000	602,562,000	427,811,000	392,507,000	663,302,000		570,721,000	451,723,000	456,811,000	298,139,000	514,542,000	575,140,000	697,526,000	790,675,000	759,598,000	626,800,000	720,962,000	639,559,000	581,889,000	585,788	786,804,000	764,104,000	622,385,000	1,010,701,000	466,493,000	688,499,000	659,662,000	437,326,000	1,611,581,000	780,940,000	661,377,000	414,594,000	345,104,000	535,865,000	568,168,000	296,492,000	638,400,000	276,443,000	209,447,000
accounts receivable	1,624,200,000	1,602,900,000	1,404,800,000	1,536,200,000	1,627,100,000	1,604,500,000	1,664,100,000	1,781,400,000	1,685,900,000	1,634,400,000	1,705,000,000	1,568,800,000	1,567,600,000	1,632,000,000	1,723,000,000	1,688,000,000	1,854,300,000	2,024,900,000	2,133,600,000	2,092,600,000	1,933,500,000	1,959,600,000	2,088,900,000	2,017,300,000	1,951,000,000	1,939,200,000	1,567,500,000	1,630,200,000	1,501,500,000	1,441,600,000	1,467,800,000	1,293,000,000	1,395,100,000	1,227,000,000	1,327,780,000	1,310,821,000	1,389,995,000	1,292,445,000	1,091,232,000	1,002,328,000	1,018,487,000	824,406,000	891,396,000	861,457,000	753,611,000		686,848,000	661,519,000	683,841,000	684,242,000	584,603,000	581,052,000	666,960,000	687,609,000	605,329,000		548,893,000	560,777,000	551,208,000	550,995	511,286,000	481,214,000	446,665,000	484,636,000	482,797,000	451,480,000	392,646,000	378,807,000	359,518,000	324,569,000	317,353,000	282,519,000	284,912,000	276,441,000		261,535,000	254,014,000	275,014,000
due from anti-cd20 therapeutic programs	459,800,000	393,600,000	464,000,000	451,900,000	451,100,000	395,200,000	435,900,000	428,300,000	438,100,000	393,800,000	431,400,000	415,400,000	435,900,000	389,400,000	400,000,000	422,200,000	369,800,000	527,200,000	441,100,000	511,600,000	582,300,000	557,500,000	527,100,000	508,400,000	481,900,000	553,500,000	518,000,000	502,900,000	324,500,000	300,600,000	305,200,000	334,100,000	315,100,000
inventory	2,274,300,000	2,273,900,000	2,460,500,000	2,469,200,000	2,506,100,000	2,516,800,000	2,527,400,000	2,982,400,000	1,333,500,000	1,281,000,000	1,344,400,000	1,375,000,000	1,294,200,000	1,215,400,000	1,347,900,000	1,254,800,000	1,171,800,000	1,027,700,000	952,700,000	858,800,000	751,800,000	776,700,000	770,200,000	916,600,000	931,700,000	890,800,000	1,007,200,000	936,500,000	921,600,000	1,001,600,000	1,009,700,000	996,400,000	964,600,000	893,400,000	918,921,000	865,738,000	825,349,000	804,022,000	753,063,000	715,935,000	672,750,000	659,003,000	614,483,000	570,390,000	506,557,000		447,373,000	392,936,000	362,940,000	337,619,000	326,843,000	310,934,000	308,254,000	295,260,000	289,066,000		267,878,000	280,038,000	293,950,000	278,686	268,529,000	268,076,000	263,602,000	249,858,000	255,028,000	237,172,000	233,987,000	222,857,000	207,897,000	186,220,000	169,102,000	155,119,000	147,024,000	191,022,000	182,815,000	227,469,000	243,538,000	236,624,000	251,016,000
other current assets	850,600,000	757,300,000	752,500,000	674,000,000	615,300,000	1,165,300,000	1,182,000,000	974,100,000	895,900,000	1,412,000,000	1,417,600,000	1,495,500,000	1,645,300,000	927,400,000	736,300,000	767,900,000	786,100,000	683,500,000	638,800,000	683,800,000	743,200,000	980,400,000	965,400,000	848,300,000	843,300,000	895,900,000	967,000,000	1,146,100,000	1,231,900,000	1,093,300,000	993,100,000	1,027,400,000	941,100,000	836,900,000	861,882,000	750,039,000	579,599,000	447,462,000	396,471,000	346,787,000	295,260,000	226,134,000	205,635,000	173,708,000	169,939,000		136,011,000	126,174,000	149,247,000	122,126,000	144,600,000	194,199,000	201,794,000	186,291,000	215,822,000		218,645,000	210,295,000	177,924,000	141,623	143,183,000	149,374,000	139,400,000	143,116,000	199,774,000	181,170,000	183,376,000	186,187,000	161,406,000	151,219,000	154,713,000	74,614,000	74,033,000	79,624,000	78,054,000	78,894,000	85,346,000	91,692,000	119,118,000
total current assets	7,967,700,000	7,626,000,000	7,456,800,000	6,830,500,000	7,108,500,000	6,756,200,000	6,859,300,000	8,454,100,000	10,431,700,000	9,762,500,000	9,791,200,000	9,765,800,000	9,740,900,000	7,915,900,000	7,162,300,000	7,183,700,000	6,719,500,000	7,843,100,000	8,493,800,000	8,007,200,000	8,448,200,000	7,909,800,000	8,942,600,000	8,719,000,000	7,432,100,000	10,195,400,000	7,568,000,000	7,108,700,000	6,859,700,000	8,732,200,000	8,091,800,000	7,447,700,000	7,201,300,000	6,700,300,000	9,270,873,000	5,618,985,000	5,258,896,000	4,672,673,000	4,372,111,000	3,925,013,000	3,525,024,000	3,184,934,000	2,643,672,000	2,523,221,000	5,328,838,000		3,244,337,000	3,055,388,000	2,868,919,000	2,677,950,000	2,975,427,000	2,837,288,000	2,688,623,000	2,628,315,000	2,540,420,000		2,255,231,000	2,409,012,000	2,480,595,000	2,572,259	2,744,278,000	2,480,653,000	2,458,000,000	2,639,080,000	2,161,028,000	2,140,475,000	2,368,407,000	1,620,470,000	2,694,006,000	1,941,341,000	1,712,567,000	1,385,157,000	1,449,740,000	1,595,681,000	1,618,081,000	1,535,212,000	1,796,302,000	1,983,727,000
property, plant and equipment	3,098,800,000	3,132,400,000	3,181,300,000	3,210,900,000	3,249,300,000	3,275,300,000	3,309,700,000	3,301,600,000	3,307,200,000	3,300,900,000	3,298,600,000	3,266,400,000	3,355,100,000	3,372,800,000	3,410,700,000	3,442,200,000	3,438,300,000	3,359,900,000	3,330,700,000	3,281,600,000	3,138,100,000	3,077,500,000	3,013,800,000	3,538,900,000	3,409,000,000	3,334,700,000	2,995,900,000	2,827,600,000	2,610,900,000	2,501,800,000	2,387,000,000	2,301,800,000	2,258,900,000	2,187,600,000	2,027,821,000	1,837,670,000	1,739,628,000	1,765,683,000	1,724,129,000	1,756,164,000	1,744,266,000	1,750,710,000	1,806,074,000	1,787,776,000	1,736,811,000		1,742,226,000	1,676,583,000	1,622,812,000	1,617,459,000	1,571,387,000	1,572,259,000	1,712,869,000	1,673,502,000	1,641,634,000		1,571,521,000	1,604,573,000	1,637,083,000	1,634,696	1,608,660,000	1,562,174,000	1,594,754,000	1,579,938,000	1,629,398,000	1,581,664,000	1,497,383,000	1,392,577,000	1,330,899,000	1,291,041,000
operating lease assets	334,500,000	346,400,000	356,400,000	380,400,000	389,400,000	428,100,000	420,000,000	460,900,000	366,500,000	399,100,000	403,900,000	424,500,000	321,100,000	359,000,000	389,100,000	402,500,000	414,500,000	434,200,000	436,200,000	422,000,000	422,000,000	434,400,000	447,800,000
intangible assets	9,467,500,000	9,584,600,000	9,691,200,000	9,805,500,000	8,232,900,000	8,284,700,000	8,363,000,000	7,344,600,000	1,776,400,000	1,813,300,000	1,850,100,000	2,008,900,000	2,075,300,000	2,150,800,000	2,286,800,000	2,385,000,000	2,988,100,000	3,323,600,000	3,383,800,000	3,446,900,000	3,392,400,000	3,681,300,000	3,056,200,000	3,379,000,000	3,661,300,000	3,794,500,000	4,019,400,000	4,051,300,000	4,103,900,000	3,808,300,000	3,869,900,000	3,967,600,000	4,012,200,000	4,085,100,000	4,181,245,000	4,294,791,000	4,353,123,000	4,028,507,000	4,129,754,000	4,249,378,000	4,364,384,000	4,474,653,000	4,580,199,000	4,678,884,000	1,581,511,000		1,631,547,000	1,681,232,000	1,732,972,000	1,783,981,000	1,608,191,000	1,659,114,000	1,678,867,000	1,731,844,000	1,772,826,000		1,768,929,000	1,822,133,000	1,871,078,000	1,927,115	1,978,519,000	2,071,809,000	2,161,058,000	2,250,766,000	2,347,561,000	2,421,255,000	2,492,354,000	2,562,566,000	2,626,838,000	2,688,090,000	2,747,241,000	2,795,620,000	2,856,292,000	2,904,838,000	2,975,601,000	3,057,209,000	3,139,315,000	3,216,772,000	3,292,827,000
goodwill	6,493,100,000	6,477,100,000	6,478,900,000	6,485,800,000	6,227,400,000	6,227,400,000	6,219,200,000	6,807,500,000	5,753,700,000	5,751,800,000	5,749,000,000	5,741,200,000	5,749,600,000	5,758,000,000	5,760,500,000	5,763,900,000	5,763,100,000	5,755,700,000	5,751,000,000	5,752,000,000	5,746,100,000	5,749,200,000	5,639,700,000	5,440,100,000	5,170,300,000	4,907,800,000	4,127,500,000	3,870,400,000	3,611,700,000	3,669,300,000	3,419,700,000	3,167,100,000	2,917,900,000	2,663,800,000	2,408,854,000	2,154,341,000	1,849,852,000	1,760,249,000	1,541,204,000	1,364,815,000	1,232,916,000	1,232,916,000	1,210,718,000	1,210,718,000	1,210,718,000		1,201,296,000	1,204,740,000	1,197,904,000	1,193,279,000	1,146,314,000	1,146,314,000	1,146,314,000	1,146,314,000	1,146,314,000		1,138,621,000	1,138,621,000	1,138,621,000	1,138,621	1,138,621,000	1,138,621,000	1,138,621,000	1,137,547,000	1,139,597,000	1,140,190,000	1,137,372,000	1,136,858,000	1,135,939,000	1,135,745,000	1,154,757,000	1,153,980,000	1,156,348,000	1,130,430,000	1,130,430,000	1,151,105,000	1,151,105,000	1,151,105,000	1,151,105,000
deferred tax asset	330,900,000	307,500,000	324,200,000	968,700,000	915,100,000	898,300,000	928,600,000	1,069,800,000	1,208,400,000	1,211,800,000	1,226,400,000	1,174,500,000	1,235,700,000	1,288,800,000	1,810,400,000	1,849,900,000	1,286,300,000	1,372,900,000	1,710,200,000	3,109,400,000	3,284,500,000	2,820,100,000	2,074,400,000
investments and other assets	637,700,000	559,100,000	560,500,000	631,400,000	681,500,000	697,600,000	745,000,000	754,600,000	1,104,900,000	1,380,800,000	1,529,200,000	1,612,600,000	1,500,800,000	1,767,500,000	2,018,600,000	2,528,100,000	2,423,000,000	1,834,900,000	1,483,300,000	1,130,600,000	1,238,800,000	1,306,000,000	1,898,300,000	1,009,800,000	902,100,000	380,100,000	1,300,400,000	1,268,300,000	1,184,500,000	1,335,800,000	1,239,600,000	1,153,000,000	1,094,600,000	1,107,600,000	892,221,000	751,588,000	640,630,000	618,795,000	565,513,000	611,791,000	639,269,000	594,350,000	636,028,000	533,852,000	306,839,000		274,054,000	271,144,000	271,864,000	368,937,000	331,548,000	237,870,000	211,747,000	228,105,000	248,198,000		201,730,000	210,761,000	230,397,000	256,299	259,507,000	261,074,000	235,152,000	210,695,000	204,198,000	212,540,000	201,028,000	181,910,000	230,630,000	267,697,000	245,620,000	232,913,000	233,004,000	293,768,000	264,061,000	270,341,000	157,828,000	148,203,000	155,933,000
total assets	28,330,200,000	28,033,100,000	28,049,300,000	28,313,200,000	26,804,100,000	26,567,600,000	26,844,800,000	28,193,200,000	25,156,800,000	24,598,400,000	24,554,100,000	24,854,200,000	25,081,400,000	23,614,400,000	23,806,700,000	24,470,400,000	23,854,700,000	24,934,100,000	25,511,800,000	26,119,200,000	27,484,000,000	26,287,600,000	26,445,500,000	25,492,200,000	23,952,900,000	26,090,100,000	23,073,200,000	21,759,000,000	21,195,900,000	22,876,800,000	22,104,900,000	21,514,800,000	20,674,700,000	19,504,800,000	20,728,368,000	16,759,171,000	15,219,454,000	14,316,559,000	13,704,142,000	12,917,998,000	12,230,131,000	11,863,335,000	11,250,249,000	10,841,590,000	10,164,717,000		10,130,118,000	9,630,621,000	9,162,380,000	9,113,549,000	9,049,604,000	8,802,204,000	8,621,979,000	8,293,524,000	8,092,493,000		7,502,150,000	8,217,323,000	8,551,854,000	9,026,437	8,777,196,000	8,575,206,000	8,478,991,000	8,535,208,000	8,172,826,000	8,170,653,000	8,628,815,000	7,816,375,000	8,935,715,000	8,709,580,000	8,552,808,000
liabilities and equity
current liabilities:
current portion of notes payable		1,749,100,000											999,800,000	999,500,000	998,800,000					1,501,800,000	1,495,300,000					3,300,000										3,262,000	3,254,000	3,136,000	3,220,000																									10,215,000	11,544,000	12,841,000	1,511,135,000	1,510,113,000	11,897,000	9,148,000
taxes payable	114,800,000	626,100,000	548,300,000	499,100,000	281,600,000	231,200,000	257,400,000	243,800,000	260,000,000	235,500,000	259,900,000	237,300,000	284,900,000	317,300,000	234,200,000	230,900,000	143,100,000	119,400,000	576,700,000	310,000,000	125,600,000	427,200,000	238,500,000	254,100,000	223,000,000	231,900,000	121,300,000	52,600,000	70,000,000	231,900,000	208,800,000	212,800,000	496,500,000	208,700,000	458,672,000	457,769,000	322,075,000	168,058,000	159,638,000	192,758,000	161,045,000	179,685,000	144,180,000	81,563,000	28,045,000		20,066,000	44,252,000	58,315,000	50,066,000	45,939,000	47,984,000	10,330,000	93,483,000	84,517,000		113,283,000	108,972,000	75,891,000	59,961	81,594,000	247,319,000	223,260,000	176,753,000	138,871,000	54,267,000	11,274,000		17,106,000	76,922,000	145,529,000	139,728,000	165,594,000	208,215,000		250,351,000	222,803,000	161,913,000
accounts payable	408,400,000	391,500,000	424,200,000	422,700,000	354,500,000	387,000,000	403,300,000	440,100,000	445,400,000	491,200,000	491,500,000	383,200,000	434,800,000	398,700,000	427,900,000	375,300,000	430,400,000	398,400,000	383,900,000	389,000,000	382,200,000	377,100,000	378,000,000	342,300,000	295,700,000	345,800,000	298,700,000	330,300,000	316,400,000	279,800,000	274,000,000	225,900,000	271,300,000	267,400,000	251,228,000	282,702,000	236,128,000	229,178,000	233,629,000	224,931,000	212,809,000	219,913,000	166,709,000	163,094,000	165,207,000		203,999,000	157,424,000	159,152,000	173,330,000	186,448,000	159,197,000	170,746,000	159,136,000	162,529,000		144,476,000	121,356,000	118,534,000	108,547	210,941,000	104,271,000	107,417,000	123,512,000	116,755,000	114,842,000	90,672,000	92,336,000	99,440,000	102,183,000	100,457,000	62,822,000	62,280,000	58,119,000	99,780,000	48,210,000	66,004,000	75,015,000	121,471,000
accrued expense and other	2,660,500,000	2,530,700,000	2,807,700,000	2,755,100,000	2,472,100,000	2,354,600,000	2,623,600,000	3,838,400,000	2,481,100,000	2,288,200,000	2,521,400,000	3,305,900,000	3,298,500,000	2,231,100,000	2,550,700,000	2,741,000,000	2,592,300,000
total current liabilities	3,183,700,000	5,297,400,000	5,528,800,000	5,425,000,000	3,108,200,000	3,222,800,000	3,434,300,000	5,022,300,000	3,186,500,000	3,014,900,000	3,272,800,000	3,926,400,000	5,018,000,000	3,946,600,000	4,211,600,000	3,347,200,000	3,165,800,000	3,804,000,000	3,447,100,000	4,638,600,000	4,432,200,000	3,210,900,000	3,148,700,000	3,174,900,000	3,152,400,000	3,152,100,000	3,448,400,000	3,379,700,000	2,992,500,000	3,419,900,000	2,499,700,000	2,516,200,000	2,776,600,000	2,577,700,000	2,633,968,000	2,555,832,000	1,946,231,000	2,219,706,000	1,940,647,000	1,916,624,000	1,594,247,000	1,758,279,000	1,518,711,000	1,304,074,000	1,281,662,000		1,657,389,000	1,521,093,000	1,432,865,000	1,337,319,000	912,889,000	885,346,000	954,330,000	978,846,000	1,050,122,000		755,658,000	682,330,000	714,942,000	721,368	803,926,000	807,767,000	923,222,000	985,872,000	885,441,000	707,172,000	2,189,175,000	1,988,744,000	3,464,929,000	500,448,000	582,855,000	495,010,000	499,982,000	520,797,000	583,036,000	558,945,000	540,653,000	1,228,529,000
notes payable	6,283,700,000	4,548,700,000							6,284,600,000	6,282,700,000	6,281,000,000	6,279,200,000	6,277,400,000	6,275,700,000	6,272,300,000	7,269,200,000	7,267,200,000	7,425,000,000	7,423,800,000	4,459,900,000	4,458,200,000	5,948,500,000	5,943,200,000	5,931,100,000	5,928,400,000	5,929,400,000										576,207,000	580,672,000	582,061,000	583,977,000	586,091,000	591,012,000																					1,082,909,000	1,085,431,000	1,042,427,000	1,038,086,000	1,060,448,000	51,843,000	50,113,000	51,348,000	52,043,000	96,694,000	45,074,000	44,526,000	43,978,000				751,681,000	748,430,000
deferred tax liability	118,300,000	133,200,000	190,500,000	882,400,000	590,600,000	658,100,000	641,800,000	728,100,000	143,900,000	251,300,000	334,700,000	328,900,000	480,600,000	571,200,000	774,700,000	918,900,000	966,700,000	1,123,400,000	1,461,500,000	2,722,800,000	2,820,400,000	2,400,600,000	1,741,700,000				120,700,000	100,800,000	94,500,000	93,100,000
long-term operating lease liabilities	310,900,000	323,400,000	334,500,000	357,000,000	367,500,000	406,500,000	400,000,000	428,800,000	304,400,000	327,000,000	333,000,000	354,800,000	274,200,000	312,300,000	348,200,000	363,900,000	380,000,000	409,100,000	414,800,000	403,700,000	410,500,000	423,000,000	436,100,000
other long-term liabilities	799,600,000	751,700,000	732,300,000	744,100,000	556,700,000	777,100,000	781,100,000	747,900,000	776,900,000	935,500,000	944,200,000	1,198,100,000	1,167,800,000	1,287,900,000	1,318,200,000	1,356,400,000	1,411,800,000	1,428,100,000	1,475,400,000	1,357,300,000	1,370,900,000	1,355,800,000	1,353,800,000	1,511,800,000	1,457,600,000	1,640,000,000	716,900,000	750,900,000	688,800,000	722,500,000	862,100,000	951,000,000	916,600,000	905,800,000	861,421,000	915,731,000	892,529,000	650,096,000	658,276,000	710,965,000	702,908,000	659,231,000	608,473,000	595,642,000	674,951,000		604,266,000	539,569,000	534,358,000	517,406,000	400,276,000	384,450,000	351,685,000	356,261,000	325,599,000		257,985,000	259,300,000	254,205,000	331,761	330,996,000	318,492,000	308,238,000	298,267,000	224,916,000	346,933,000	331,977,000	226,076,000	193,955,000	195,337,000	79,836,000	98,167,000	95,668,000	80,354,000	72,309,000	58,615,000	57,259,000	62,598,000	54,959,000
total liabilities	10,696,200,000	11,054,400,000	11,333,300,000	11,954,300,000	10,915,000,000	11,354,600,000	12,045,400,000	13,713,500,000	10,696,300,000	10,811,400,000	11,165,700,000	12,087,400,000	13,218,000,000	12,393,700,000	12,925,000,000	13,255,600,000	13,191,500,000	14,189,600,000	14,222,600,000	13,582,300,000	13,492,200,000	13,338,800,000	12,623,500,000	11,732,400,000	11,699,200,000	12,052,600,000	10,224,300,000	10,185,400,000	9,728,500,000	10,748,200,000	9,990,100,000	10,111,100,000	10,346,600,000	10,129,900,000	10,161,425,000	4,186,173,000	3,549,996,000	3,502,519,000	3,273,257,000	3,352,772,000	3,089,068,000	3,242,497,000	3,124,561,000	2,939,445,000	2,825,111,000		3,166,323,000	2,968,681,000	2,891,695,000	2,805,001,000	2,622,617,000	2,568,610,000	2,565,785,000	2,619,224,000	2,643,050,000		2,290,860,000	2,266,729,000	2,289,972,000	2,428,627	2,531,491,000	2,554,952,000	2,672,908,000	2,766,730,000	2,649,895,000	2,637,945,000	3,094,520,000	2,823,676,000	4,299,016,000	1,362,414,000	1,403,030,000
commitments, contingencies and guarantees
equity:
biogen inc. shareholders’ equity:
preferred stock, par value 0.001 per share
common stock	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	100,000	124,000	129,000	129,000	129,000	129,000	128,000	128,000	128,000	128,000	128,000	128,000		127,000	127,000	127,000	129,000	128,000	128,000	127,000	125,000	124,000		129,000	139,000	144,000	149	149,000	149,000	149,000	149,000	149,000	149,000	147,000	146,000	172,000	173,000	173,000	173,000	173,000	173,000	173,000	175,000	175,000	173,000	173,000
additional paid-in capital	714,000,000	629,900,000	569,400,000	488,500,000	407,500,000	329,500,000	302,500,000	242,200,000	170,700,000	91,200,000	73,300,000			119,000,000						100,000				47,800,000			59,200,000	19,300,000				69,100,000	18,400,000		1,342,373,000	4,251,443,000	4,242,426,000	4,196,156,000	4,150,007,000	4,106,084,000	4,054,774,000	4,023,651,000	3,987,377,000	3,917,985,000	3,858,955,000		3,854,525,000	3,819,063,000	3,825,647,000	4,217,248,000	4,185,048,000	4,143,429,000	4,224,865,000	3,975,428,000	3,895,103,000		4,282,739,000	5,268,465,000	5,781,920,000	6,184,315	6,142,936,000	6,109,917,000	6,073,957,000	6,029,111,000	5,979,200,000	5,848,543,000	5,807,071,000	5,497,506,000	8,286,958,000	8,286,744,000	8,308,232,000	8,260,886,000	8,248,773,000	8,203,521,000	8,206,911,000	8,246,743,000	8,260,548,000	8,207,433,000	8,184,979,000
accumulated other comprehensive income	-238,100,000	-174,500,000	-136,200,000	-145,700,000	-146,000,000	-160,500,000	-153,700,000	-159,300,000	-172,800,000	-172,000,000		-163,600,000	-110,400,000	-115,200,000																																	-55,305,000	-51,115,000	-50,557,000	-17,710,000	-26,535,000	7,571,000	25,713,000	-992,000	-21,610,000		-28,422,000	22,872,000	50,496,000	37,114	11,293,000	-32,346,000	-11,106,000	33,431,000	121,115,000	123,439,000	79,246,000	48,127,000	32,167,000	31,658,000	21,855,000		-22,532,000	4,594,000					-6,767,000
retained earnings	20,135,100,000	19,500,300,000	19,259,800,000	18,993,100,000	18,604,600,000	18,021,000,000	17,627,600,000	17,377,900,000	17,446,000,000	16,854,400,000	16,466,500,000	15,916,100,000	14,959,900,000	14,215,500,000	13,543,500,000	13,900,700,000	13,833,500,000	13,961,000,000	14,466,700,000	15,673,100,000	17,065,200,000	16,182,800,000	17,026,700,000	16,944,100,000	15,499,500,000	17,334,600,000	16,107,700,000	14,881,700,000	14,781,200,000	15,071,600,000	15,030,000,000	14,229,100,000	13,179,300,000	12,208,400,000	11,999,358,000	11,033,736,000	10,106,460,000	9,283,919,000	8,400,455,000	7,543,597,000	6,829,091,000	6,349,135,000	5,891,829,000	5,404,213,000	4,913,543,000		4,486,794,000	4,194,551,000	3,796,154,000	3,409,308,000	3,106,761,000	2,806,523,000	2,454,848,000	2,166,813,000	1,872,481,000		1,405,340,000	1,131,523,000	1,068,890,000	781,321	516,632,000	388,019,000	270,180,000	75,361,000
treasury stock	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,977,100,000	-2,611,700,000	-2,611,700,000	-2,611,700,000	-2,611,700,000	-2,611,700,000	-2,611,713,000	-2,611,706,000	-2,611,706,000	-2,611,706,000	-2,084,908,000	-2,061,832,000	-1,724,927,000	-1,724,927,000	-1,724,927,000	-1,365,641,000	-1,365,641,000		-1,324,618,000	-1,303,074,000	-1,303,074,000	-1,303,074,000	-839,903,000	-728,503,000	-728,503,000	-537,215,000	-349,592,000		-488,980,000	-513,627,000	-679,920,000	-438,710	-458,472,000	-478,045,000	-527,097,000	-369,574,000	-474,396,000	-240,219,000			-25,346,000	-150,194,000	-319,655,000
total equity	17,634,000,000	16,978,700,000	16,716,000,000	16,358,900,000	15,889,100,000	15,213,000,000	14,799,400,000	14,479,700,000	14,460,500,000	13,787,000,000	13,388,400,000	12,766,800,000	11,863,400,000	11,220,700,000	10,881,700,000	11,214,800,000	10,663,200,000	10,744,500,000	11,289,200,000	12,536,900,000	13,991,800,000	12,948,800,000	13,822,000,000	13,759,800,000	12,253,700,000	14,037,500,000	12,848,900,000	11,573,600,000	11,467,400,000	12,128,600,000	12,114,800,000	11,403,700,000	10,328,100,000	9,374,900,000	10,566,943,000	12,572,998,000	11,669,458,000	10,814,040,000	10,430,885,000	9,565,226,000	9,141,063,000	8,620,838,000	8,125,688,000	7,902,145,000	7,339,606,000		6,963,795,000	6,661,940,000	6,270,685,000	6,308,548,000	6,426,987,000	6,233,594,000	6,056,194,000	5,674,300,000	5,449,443,000					6,597,810	6,245,705,000
total liabilities and equity	28,330,200,000	28,033,100,000	28,049,300,000	28,313,200,000	26,804,100,000	26,567,600,000	26,844,800,000	28,193,200,000	25,156,800,000	24,598,400,000	24,554,100,000	24,854,200,000	25,081,400,000	23,614,400,000	23,806,700,000	24,470,400,000	23,854,700,000	24,934,100,000	25,511,800,000	26,119,200,000	27,484,000,000	26,287,600,000	26,445,500,000	25,492,200,000	23,952,900,000	26,090,100,000	23,073,200,000	21,759,000,000	21,195,900,000	22,876,800,000	22,104,900,000	21,514,800,000	20,674,700,000	19,504,800,000	20,728,368,000	16,759,171,000	15,219,454,000	14,316,559,000	13,704,142,000	12,917,998,000	12,230,131,000	11,863,335,000	11,250,249,000	10,841,590,000	10,164,717,000		10,130,118,000	9,630,621,000	9,162,380,000	9,113,549,000	9,049,604,000	8,802,204,000	8,621,979,000	8,293,524,000	8,092,493,000					9,026,437	8,777,196,000
current portion of notes payable and term loan			1,748,600,000
notes payable and term loan			4,547,200,000	4,545,800,000	6,292,000,000	6,290,100,000	6,788,200,000	6,786,400,000
biogen inc. shareholders’ equity
current portion notes payable and term loan				1,748,100,000
current portion of term loan						250,000,000	150,000,000	500,000,000
marketable securities									3,460,500,000	2,143,100,000	1,473,500,000	1,235,500,000	2,151,300,000	2,002,400,000	1,413,300,000	1,308,800,000	1,320,000,000	1,355,000,000	1,942,700,000	1,269,100,000	2,093,500,000	1,228,800,000	1,665,800,000	2,041,700,000	1,974,000,000	1,808,000,000	1,960,200,000	1,723,500,000	1,956,200,000	2,568,600,000	2,231,200,000	2,434,800,000	2,454,700,000	2,120,500,000	1,753,499,000	1,086,595,000	673,946,000	640,460,000	675,065,000	709,869,000	431,610,000	620,167,000	240,882,000	275,163,000			1,134,989,000	1,154,071,000	949,239,000	978,473,000	1,176,115,000	944,381,000	629,218,000	437,870,000	448,146,000		248,710,000	513,115,000	681,835,000	821,888	836,270,000	637,219,000	719,586,000	217,127,000	234,515,000	156,920,000	319,408,000	234,021,000	191,136,000	346,639,000	241,314,000	246,425,000	368,670,000
total biogen inc. shareholders’ equity							14,799,400,000	14,483,800,000	14,466,900,000	13,796,600,000	13,397,900,000	12,775,500,000	11,872,500,000	11,242,300,000	10,429,900,000	10,751,900,000	10,682,200,000	10,758,500,000	11,308,700,000	12,546,900,000	13,995,900,000	12,952,900,000	13,829,900,000	13,766,600,000	12,260,900,000	14,053,700,000	12,860,500,000	11,585,200,000	11,479,000,000	12,140,100,000	12,117,500,000	11,403,800,000	10,326,800,000	9,372,800,000	10,572,726,000	12,572,577,000	11,666,771,000
noncontrolling interests								-4,100,000	-6,400,000	-9,600,000	-9,500,000	-8,700,000	-9,100,000	-21,600,000	451,800,000	462,900,000	-19,000,000	-14,000,000	-19,500,000	-10,000,000	-4,100,000	-4,100,000	-7,900,000	-6,800,000	-7,200,000	-16,200,000	-11,600,000	-11,600,000	-11,600,000	-11,500,000	-2,700,000	-100,000	1,300,000	2,100,000	-5,783,000	421,000	2,687,000	5,030,000	3,189,000	3,927,000	4,352,000	596,000	596,000	596,000	596,000		2,272,000	2,388,000	2,388,000	2,647,000	1,488,000	4,446,000	79,144,000	70,141,000	52,937,000
accumulated other comprehensive loss											-164,900,000				-136,600,000	-171,800,000	-174,300,000	-225,500,000	-181,000,000	-149,300,000	-92,300,000	-252,900,000	-219,800,000	-248,300,000	-261,600,000	-303,900,000	-329,400,000	-338,800,000	-325,200,000	-319,900,000	-300,900,000	-282,800,000	-259,300,000	-224,000,000	-157,416,000	-101,025,000	-70,538,000	-59,488,000	-37,987,000	-26,678,000	-22,355,000	-27,745,000	-29,315,000	-55,136,000	-67,975,000																											-17,876,000			-13,910,000	-6,189,000	-8,382,000	-9,377,000
commitments and contingencies
accrued expenses and other																		3,286,200,000	2,486,500,000	2,437,800,000	2,429,100,000	2,318,000,000	2,435,000,000	2,578,500,000	2,633,700,000	2,571,100,000	2,455,200,000	2,436,900,000	2,044,600,000	2,903,500,000	2,012,000,000	2,072,700,000	2,003,900,000	2,096,800,000	1,918,897,000	1,812,099,000	1,384,774,000	1,819,334,000	1,544,160,000	1,495,549,000	1,216,843,000	1,355,187,000	1,204,437,000	1,056,229,000	885,093,000		979,945,000	866,208,000	762,353,000	660,562,000	677,210,000	674,743,000	641,273,000	591,448,000	665,923,000		487,803,000	432,887,000	500,755,000	537,408	496,694,000	429,689,000	534,887,000	497,263,000	471,315,000	400,529,000	367,885,000	386,295,000	346,456,000	312,195,000	336,869,000	285,730,000	252,693,000	235,237,000	266,135,000	241,781,000	235,457,000	219,142,000	247,802,000
assets held for sale																						683,400,000	682,000,000																																																	9,601,000	9,403,000	24,534,000	58,416,000	65,186,000
liabilities held for sale																						88,600,000	97,200,000
deferred tax assets																								2,160,900,000	2,217,900,000	2,277,400,000																																														44,966,000	55,732,000	33,730,000	41,242,000	149,187,000	145,006,000	90,568,000	86,880,000
deferred tax liabilities																								1,114,600,000	1,160,800,000	1,331,100,000
current portion of notes payable and other financing arrangements																											573,200,000	559,900,000	561,500,000	4,700,000	4,900,000	4,800,000	4,900,000	4,800,000	5,171,000
notes payable and other financing arrangements																											5,938,300,000	5,954,000,000	5,952,700,000	6,512,700,000	6,529,600,000	6,538,300,000	6,535,600,000	6,521,500,000	6,529,275,000							592,433,000	694,894,000	726,388,000	711,831,000
long-term deferred tax liability																															98,700,000	105,600,000	117,800,000	124,900,000	136,761,000	138,403,000	130,564,000	50,656,000	90,357,000	139,092,000	200,901,000	232,554,000	302,483,000	313,341,000	156,667,000		217,272,000	249,577,000	282,904,000	324,264,000	248,644,000	238,175,000	196,784,000	218,504,000	200,950,000		207,492,000	248,898,000	240,618,000	289,654	310,962,000	345,784,000	356,017,000	440,164,000	501,452,000	523,392,000	521,525,000	558,743,000	588,784,000	614,586,000	643,645,000	653,433,000	691,395,000	736,255,000	762,282,000	856,297,000	882,021,000	895,851,000	921,771,000
due from unconsolidated joint business																																		314,500,000	319,788,000	323,714,000	311,956,000	283,360,000	269,999,000	286,897,000	278,316,000	252,662,000	263,465,000	249,996,000	267,429,000		268,395,000	268,965,000	266,841,000	257,351,000	228,724,000	231,582,000	184,871,000	230,610,000	222,459,000		250,143,000	205,228,000	193,789,000	193,279	198,206,000	180,666,000	206,925,000	196,542,000	184,221,000	159,560,000	166,686,000	161,272,000	162,468,000	151,754,000	168,708,000	157,319,000	164,862,000	140,975,000	141,059,000	141,543,000	140,945,000	137,948,000	137,451,000
biogen idec inc. shareholders’ equity
total biogen idec inc. shareholders’ equity																																						10,809,010,000	10,427,696,000	9,561,299,000	9,136,711,000	8,620,242,000	8,125,092,000	7,901,549,000	7,339,010,000		6,961,523,000	6,659,552,000	6,268,297,000	6,305,901,000	6,425,499,000	6,229,148,000	5,977,050,000	5,604,159,000	5,396,506,000		5,170,806,000	5,909,372,000	6,221,530,000	6,564,189	6,212,538,000
current portion of notes payable and line of credit																																								3,386,000	3,550,000	3,494,000	3,385,000	3,188,000	203,317,000		453,379,000	453,209,000	453,045,000	453,361,000						11,300,000	10,096,000	19,115,000	19,762,000	15,452	14,697,000	26,488,000	27,667,000
reverse repurchase agreements																																													2,968,000,000
2.2
3.1
3.2
3.3
3.4
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8+
4.9
10.1
10.2
10.3†
10.4†
10.5
10.6*
10.7*
10.8*
10.9*
10.10*
exhibit no.
10.11*
10.12*
10.13*
10.14*
10.15*
10.16*
10.17*
10.18*
10.19*
10.20*
10.21*
10.22*
10.23*
10.24*
10.25*
10.26*
10.27*
10.28*
10.29*
10.30*
10.31*
10.32*
10.33*
10.34*
notes payable, line of credit and other financing arrangements																																															687,396,000	658,442,000	641,568,000	626,012,000	1,060,808,000
current portion of notes payable, line of credit and other financing arrangements																																																			3,292,000	3,422,000	131,981,000	134,779,000	137,153,000
notes payable and line of credit																																																				1,060,639,000	1,062,986,000	1,065,613,000	1,066,379,000	1,068,800,000	1,069,725,000	1,076,201,000	1,080,207,000	1,085,844	1,085,607,000
biogen idec inc. shareholders’ equity:
financial assets:
marketable securities — current																																																								197,800,000
marketable securities — non-current																																																								560,000,000
total financial assets																																																								1,384,600,000
borrowings:
total borrowings																																																								1,080,100,000
working capital:
current assets																																																								2,131,100,000
current liabilities																																																								-824,500,000
total working capital																																																								1,306,700,000
•																																																								2,077,600,000
liabilities and shareholders’ equity
shareholders’ equity:
noncontrolling interest																																																									40,484,000	41,222,000	40,352,000	33,621	33,167,000	32,560,000
total shareholders’ equity																																																									5,211,290,000	5,950,594,000	6,261,882,000			6,020,254,000	5,806,083,000	5,768,478,000	5,522,931,000	5,532,708,000	5,534,295,000	4,992,699,000	4,636,699,000	7,347,166,000	7,149,778,000	6,894,874,000	7,008,591,000	7,142,842,000	6,905,876,000	6,797,827,000	6,745,814,000	6,780,959,000
total liabilities and shareholders’ equity																																																									7,502,150,000	8,217,323,000	8,551,854,000			8,575,206,000	8,478,991,000	8,535,208,000	8,172,826,000	8,170,653,000	8,628,815,000	7,816,375,000	8,935,715,000	8,709,580,000	8,552,808,000
collateral received for loaned securities																																																															29,991,000
loaned securities																																																															29,446,000	158,971,000	191,244,000	140,981,000	204,433,000
collateral payable on loaned securities																																																															29,991,000	178,129,000	146,956,000	124,693,000	208,209,000
cash collateral received for loaned securities																																																																178,129,000	146,956,000	124,693,000	208,209,000
accumulated deficit																																																																	-103,137,000	-199,204,000	-352,169,000	-553,080,000	-666,955,000	-821,215,000	-860,827,000	-954,991,000	-1,104,681,000	-928,178,000	-1,021,644,000	-802,311,000	-793,384,000	-808,423,000	-801,094,000
tender obligation																																																																					2,990,030,000
tender offer obligation																																																																					-2,990,297,000
property and equipment																																																																							1,280,385,000	1,246,116,000	1,227,296,000	1,191,968,000	1,174,396,000	1,093,680,000	1,150,420,000	1,561,918,000	1,525,225,000
deferred stock-based compensation																																																																											-42,894,000	-53,836,000	-66,466,000	-82,105,000	-36,280,000
deferred revenue																																																																								6,730,000	19,415,000	19,226,000	16,928,000	18,603,000	16,389,000	20,778,000	13,695,000
convertible preferred stock, par value 0.001 per share
less treasury stock, at cost																																																																								393,318,000	113,142,000	137,268,000		586,755,000	646,677,000	526,742,000
marketable securities available-for-sale																																																																										313,490,000	282,585,000	314,906,000	289,053,000	875,438,000	1,109,624,000
shareholders’ equity
accounts receivable, less allowances																																																																											265,742,000
current taxes payable																																																																											200,193,000				129,350,000
less treasury stock, at cost; 5,751 and 8,766 shares at december 31, 2005 and 2004, respectively																																																																											222,760,000

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