BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

WINMILL & CO. INC's Holding History (CIK: 0000052234)

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

Q4 2020

Shares 6,900 Value ($000) $1,690 Avg Close $259.08 Range $223.25 - $363.92

Q3 2020

Shares 6,900 Value ($000) $1,957 Avg Close $278.91 Range $261.87 - $312.00

Q2 2020

Shares 6,900 Value ($000) $1,846 Avg Close $300.59 Range $257.60 - $350.24

Q1 2020

Shares 2,000 Value ($000) $633 Avg Close $303.47 Range $262.25 - $374.99

Q4 2019

Shares 2,000 Value ($000) $593 Avg Close $277.46 Range $219.70 - $318.00

Q3 2019

Shares 1,400 Value ($000) $326 Avg Close $232.85 Range $215.78 - $246.99

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2020	6,900	$1,690	$259.08	$223.25 - $363.92
Q3 2020	6,900	$1,957	$278.91	$261.87 - $312.00
Q2 2020	6,900	$1,846	$300.59	$257.60 - $350.24
Q1 2020	2,000	$633	$303.47	$262.25 - $374.99
Q4 2019	2,000	$593	$277.46	$219.70 - $318.00
Q3 2019	1,400	$326	$232.85	$215.78 - $246.99