BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

MARSICO CAPITAL MANAGEMENT LLC's Holding History (CIK: 0001055966)

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

Q4 2018

Shares 97,272 Value ($000) $29,271 Avg Close $319.14 Range $278.46 - $358.41

Q3 2018

Shares 105,825 Value ($000) $37,389 Avg Close $344.30 Range $288.13 - $388.67

Q2 2015

Shares 1,282,348 Value ($000) $517,991 Avg Close $401.33 Range $368.88 - $432.88

Q1 2015

Shares 1,818,871 Value ($000) $768,001 Avg Close $394.14 Range $334.40 - $480.18

Q4 2014

Shares 1,607,156 Value ($000) $545,549 Avg Close $323.51 Range $290.85 - $361.93

Q3 2014

Shares 1,734,366 Value ($000) $573,745 Avg Close $329.72 Range $298.31 - $349.00

Q2 2014

Shares 1,927,066 Value ($000) $607,624 Avg Close $300.97 Range $272.02 - $322.25

Q1 2014

Shares 2,485,659 Value ($000) $760,289 Avg Close $317.43 Range $270.62 - $358.89

Q4 2013

Shares 2,521,231 Value ($000) $705,314 Avg Close $258.65 Range $221.07 - $298.82

Q3 2013

Shares 2,877,019 Value ($000) $692,671 Avg Close $223.81 Range $203.55 - $248.95

Q2 2013

Shares 3,997,754 Value ($000) $860,316 Avg Close $213.68 Range $191.80 - $242.64

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2018	97,272	$29,271	$319.14	$278.46 - $358.41
Q3 2018	105,825	$37,389	$344.30	$288.13 - $388.67
Q2 2015	1,282,348	$517,991	$401.33	$368.88 - $432.88
Q1 2015	1,818,871	$768,001	$394.14	$334.40 - $480.18
Q4 2014	1,607,156	$545,549	$323.51	$290.85 - $361.93
Q3 2014	1,734,366	$573,745	$329.72	$298.31 - $349.00
Q2 2014	1,927,066	$607,624	$300.97	$272.02 - $322.25
Q1 2014	2,485,659	$760,289	$317.43	$270.62 - $358.89
Q4 2013	2,521,231	$705,314	$258.65	$221.07 - $298.82
Q3 2013	2,877,019	$692,671	$223.81	$203.55 - $248.95
Q2 2013	3,997,754	$860,316	$213.68	$191.80 - $242.64