BIOGEN INC

Ticker: BIIB CUSIP: 09062X103 Class: COM

Greykasell Wealth Strategies, Inc.'s Holding History (CIK: 0002041220)

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

Q4 2025

Shares 385 Value ($000) $68 Avg Close $163.37 Range $138.00 - $185.17

Q3 2025

Shares 385 Value ($000) $54 Avg Close $135.17 Range $121.05 - $150.28

Q2 2025

Shares 505 Value ($000) $63 Avg Close $124.60 Range $110.04 - $137.32

Q1 2025

Shares 198 Value ($000) $27 Avg Close $142.96 Range $128.51 - $157.09

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	385	$68	$163.37	$138.00 - $185.17
Q3 2025	385	$54	$135.17	$121.05 - $150.28
Q2 2025	505	$63	$124.60	$110.04 - $137.32
Q1 2025	198	$27	$142.96	$128.51 - $157.09