Activity — Alector, Inc.

15 moves.

Top impact Insider · CEO moves Insider · biggest buys Insider · biggest sells Institution · biggest moves Institution · new positions

Date	Actor	Action	Security	Value	Shares Δ	Position after	Impact
Jun 17, 2026	Scheller Richard H Director	Grant	Common Stock	$0	+29K +27.02%	134,899 0.12% of shares	low
Jun 1, 2026	Scheller Richard H Director	Grant	Common Stock	$0	+11K +11.36%	106,199 0.10% of shares	low
Jun 17, 2026	Lavigne Louis J Jr Director	Grant	Common Stock	$0	+29K +28.87%	128,109 0.11% of shares	low
Jun 17, 2026	Desouza Errol B Director	Grant	Common Stock	$0	+29K +41.03%	98,650 0.09% of shares	low
Mar 13, 2026	Arnon Rosenthal CEO	Grant	Common Stock	$0	+116K +4.97%	2,454,422 2.20% of shares	low
Mar 15, 2026	Berkley Neil Lindsay Executive	Grant	Common Stock	$0	+55K +15.84%	399,260 0.36% of shares	low
Mar 10, 2026	Wong-Sarad Grace Executive	Sell	Common Stock	$2.6K	-1K -0.93%	106,465 0.10% of shares	low
Mar 3, 2026	Wong-Sarad Grace Executive	Sell	Common Stock	$7.0K	-3K -3.04%	107,465 0.10% of shares	low
Feb 26, 2026	Wong-Sarad Grace Executive	Sell	Common Stock	$10.2K	-4K -3.32%	118,903 0.11% of shares	low
Mar 2, 2026	Wong-Sarad Grace Executive	Sell	Common Stock	$17.1K	-8K -6.79%	110,832 0.10% of shares	low
Mar 2, 2026	Berkley Neil Lindsay Executive	Sell	Common Stock	$63.0K	-30K -7.92%	344,660 0.31% of shares	low
Mar 2, 2026	Arnon Rosenthal CEO	Sell	Common Stock	$173.8K	-82K -3.38%	2,338,176 2.09% of shares	medium
Jun 17, 2026	Scheller Richard H Director	Grant	Stock Option (right to buy)	—	+9K	9,450 <0.01% of shares	low
Jun 17, 2026	Lavigne Louis J Jr Director	Grant	Stock Option (right to buy)	—	+9K	9,450 <0.01% of shares	low
Jun 17, 2026	Desouza Errol B Director	Grant	Stock Option (right to buy)	—	+9K	9,450 <0.01% of shares	low