BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Municipal Employees' Retirement System of Michigan's Holding History (CIK: 0001588873)

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

Q2 2020

Shares 1,450 Value ($000) $388 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 3,220 Value ($000) $1,019 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 3,220 Value ($000) $955 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 3,550 Value ($000) $827 Avg Close $232.85 Range $215.78 - $246.99

Q2 2019

Shares 3,550 Value ($000) $830 Avg Close $230.90 Range $219.20 - $245.35

Q1 2019

Shares 3,550 Value ($000) $839 Avg Close $314.89 Range $216.12 - $344.00

Q4 2018

Shares 6,230 Value ($000) $1,875 Avg Close $319.14 Range $278.46 - $358.41

Q2 2018

Shares 5,590 Value ($000) $1,622 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 5,540 Value ($000) $1,517 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 5,460 Value ($000) $1,739 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 5,460 Value ($000) $1,710 Avg Close $296.11 Range $269.50 - $330.00

Q2 2017

Shares 7,010 Value ($000) $1,902 Avg Close $264.42 Range $244.28 - $291.90

Q1 2017

Shares 7,010 Value ($000) $1,917 Avg Close $282.75 Range $260.50 - $301.42

Q4 2016

Shares 7,010 Value ($000) $1,988 Avg Close $296.43 Range $268.00 - $329.83

Q3 2016

Shares 6,930 Value ($000) $2,169 Avg Close $296.18 Range $240.07 - $333.65

Q2 2016

Shares 6,910 Value ($000) $1,671 Avg Close $263.54 Range $223.02 - $292.69

Q1 2016

Shares 6,880 Value ($000) $1,791 Avg Close $264.15 Range $242.07 - $301.02

Q4 2015

Shares 6,870 Value ($000) $2,105 Avg Close $287.35 Range $254.00 - $311.65

Q3 2015

Shares 7,200 Value ($000) $2,101 Avg Close $330.23 Range $265.00 - $412.24

Q2 2015

Shares 9,330 Value ($000) $3,769 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 7,000 Value ($000) $2,956 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 8,200 Value ($000) $2,783 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 8,200 Value ($000) $2,713 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 8,100 Value ($000) $2,554 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 8,100 Value ($000) $2,478 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 7,900 Value ($000) $2,210 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 7,900 Value ($000) $1,902 Avg Close $223.81 Range $203.55 - $248.95

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2020	1,450	$388	$300.59	$257.60 - $350.24
Q1 2020	3,220	$1,019	$303.47	$262.25 - $374.99
Q4 2019	3,220	$955	$277.46	$219.70 - $318.00
Q3 2019	3,550	$827	$232.85	$215.78 - $246.99
Q2 2019	3,550	$830	$230.90	$219.20 - $245.35
Q1 2019	3,550	$839	$314.89	$216.12 - $344.00
Q4 2018	6,230	$1,875	$319.14	$278.46 - $358.41
Q2 2018	5,590	$1,622	$281.15	$249.17 - $310.91
Q1 2018	5,540	$1,517	$310.41	$259.76 - $370.57
Q4 2017	5,460	$1,739	$320.80	$301.81 - $348.84
Q3 2017	5,460	$1,710	$296.11	$269.50 - $330.00
Q2 2017	7,010	$1,902	$264.42	$244.28 - $291.90
Q1 2017	7,010	$1,917	$282.75	$260.50 - $301.42
Q4 2016	7,010	$1,988	$296.43	$268.00 - $329.83
Q3 2016	6,930	$2,169	$296.18	$240.07 - $333.65
Q2 2016	6,910	$1,671	$263.54	$223.02 - $292.69
Q1 2016	6,880	$1,791	$264.15	$242.07 - $301.02
Q4 2015	6,870	$2,105	$287.35	$254.00 - $311.65
Q3 2015	7,200	$2,101	$330.23	$265.00 - $412.24
Q2 2015	9,330	$3,769	$401.33	$368.88 - $432.88
Q1 2015	7,000	$2,956	$394.14	$334.40 - $480.18
Q4 2014	8,200	$2,783	$323.51	$290.85 - $361.93
Q3 2014	8,200	$2,713	$329.72	$298.31 - $349.00
Q2 2014	8,100	$2,554	$300.97	$272.02 - $322.25
Q1 2014	8,100	$2,478	$317.43	$270.62 - $358.89
Q4 2013	7,900	$2,210	$258.65	$221.07 - $298.82
Q3 2013	7,900	$1,902	$223.81	$203.55 - $248.95