BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

American Beacon Advisors, Inc.'s Holding History (CIK: 0000908758)

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

Q3 2018

Shares 459 Value ($000) $162 Avg Close $344.30 Range $288.13 - $388.67

Q2 2018

Shares 399 Value ($000) $116 Avg Close $281.15 Range $249.17 - $310.91

Q1 2018

Shares 399 Value ($000) $109 Avg Close $310.41 Range $259.76 - $370.57

Q4 2017

Shares 361 Value ($000) $115 Avg Close $320.80 Range $301.81 - $348.84

Q3 2017

Shares 320 Value ($000) $100 Avg Close $296.11 Range $269.50 - $330.00

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2018	459	$162	$344.30	$288.13 - $388.67
Q2 2018	399	$116	$281.15	$249.17 - $310.91
Q1 2018	399	$109	$310.41	$259.76 - $370.57
Q4 2017	361	$115	$320.80	$301.81 - $348.84
Q3 2017	320	$100	$296.11	$269.50 - $330.00