Alfred Sandrock

BIIB

Alfred Sandrock serves as director, officer: President and CEO at Biogen Inc. (BIIB). This page tracks their complete SEC Form 4 insider trading history including stock purchases and sales.

Total Buys

0 trades

$0.00

Total Sells

10 trades

$3.95M

Net Position

Net Seller

$3.95M

Companies Traded

VYGR, BIIB

Active Period

Jun 2021 – Feb 2026

10 total trades

Most Recent

Sell VYGR

Feb 26, 2026 · $53.8K

Alfred Sandrock's Insider Trading at Biogen Inc. (BIIB)

Buys

0 · $0.00

Sells

1 · $3.38M

Total Shares Bought

Total Shares Sold

7,672

BIIB Price Chart

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Date	Type	Shares	Avg Price	Value	Shares After
Jun 7, 2021	Sell	7,672	$440.00	$3.38M	0

Alfred Sandrock's Insider Trading at Voyager Therapeutics, Inc. (VYGR)

Buys

0 · $0.00

Sells

9 · $575.8K

Total Shares Bought

Total Shares Sold

109,937

VYGR Price Chart

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Date	Type	Shares	Avg Price	Value	Shares After
Feb 26, 2026	Sell	14,197	$3.79	$53.8K	484,060
Feb 18, 2026	Sell	11,732	$3.41	$40.0K	0
Feb 11, 2026	Sell	12,192	$3.78	$46.1K	509,989
Apr 4, 2025	Sell	10,885	$3.43	$37.3K	430,931
Feb 24, 2025	Sell	11,702	$4.24	$49.6K	296,816
Feb 12, 2025	Sell	16,644	$4.45	$74.1K	308,518
Apr 3, 2024	Sell	12,115	$9.86	$119.5K	322,839
Feb 22, 2024	Sell	13,033	$7.46	$97.2K	334,954
Apr 5, 2023	Sell	7,437	$7.83	$58.2K	214,618