BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

HBK INVESTMENTS L P's Holding History (CIK: 0001011443)

Note: Option positions (PUT/CALL) are excluded.

Q4 2019

Shares 29,311 Value ($000) $8,697 Avg Close $277.46 Range $219.70 - $318.00

Q2 2019

Shares 3,697 Value ($000) $865 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 42,192 Value ($000) $9,973 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 24,368 Value ($000) $7,333 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 46,243 Value ($000) $16,338 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 138,173 Value ($000) $40,103 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 180,530 Value ($000) $49,433 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 28,700 Value ($000) $9,143 Avg Close $320.80 Range $301.81 - $348.84

Q2 2017

Shares 66,700 Value ($000) $18,100 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 30,290 Value ($000) $8,282 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 142,100 Value ($000) $40,297 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 134,816 Value ($000) $42,201 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 32,455 Value ($000) $7,848 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 25,968 Value ($000) $6,760 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 102,841 Value ($000) $31,505 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 52,532 Value ($000) $15,329 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 55,921 Value ($000) $22,589 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 37,900 Value ($000) $16,003 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 100,700 Value ($000) $34,183 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 56,193 Value ($000) $18,589 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 62,511 Value ($000) $19,710 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 98,600 Value ($000) $30,159 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 90,400 Value ($000) $25,289 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 38,290 Value ($000) $9,219 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 62,264 Value ($000) $13,399 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2019	29,311	$8,697	$277.46	$219.70 - $318.00
Q2 2019	3,697	$865	$230.90	$219.20 - $245.35
Q1 2019	42,192	$9,973	$314.89	$216.12 - $344.00
Q4 2018	24,368	$7,333	$319.14	$278.46 - $358.41
Q3 2018	46,243	$16,338	$344.30	$288.13 - $388.67
Q2 2018	138,173	$40,103	$281.15	$249.17 - $310.91
Q1 2018	180,530	$49,433	$310.41	$259.76 - $370.57
Q4 2017	28,700	$9,143	$320.80	$301.81 - $348.84
Q2 2017	66,700	$18,100	$264.42	$244.28 - $291.90
Q1 2017	30,290	$8,282	$282.75	$260.50 - $301.42
Q4 2016	142,100	$40,297	$296.43	$268.00 - $329.83
Q3 2016	134,816	$42,201	$296.18	$240.07 - $333.65
Q2 2016	32,455	$7,848	$263.54	$223.02 - $292.69
Q1 2016	25,968	$6,760	$264.15	$242.07 - $301.02
Q4 2015	102,841	$31,505	$287.35	$254.00 - $311.65
Q3 2015	52,532	$15,329	$330.23	$265.00 - $412.24
Q2 2015	55,921	$22,589	$401.33	$368.88 - $432.88
Q1 2015	37,900	$16,003	$394.14	$334.40 - $480.18
Q4 2014	100,700	$34,183	$323.51	$290.85 - $361.93
Q3 2014	56,193	$18,589	$329.72	$298.31 - $349.00
Q2 2014	62,511	$19,710	$300.97	$272.02 - $322.25
Q1 2014	98,600	$30,159	$317.43	$270.62 - $358.89
Q4 2013	90,400	$25,289	$258.65	$221.07 - $298.82
Q3 2013	38,290	$9,219	$223.81	$203.55 - $248.95
Q2 2013	62,264	$13,399	$213.68	$191.80 - $242.64