Alector, Inc. ALEC NASDAQ

NASDAQ Global Select • Healthcare • Biotechnology • US • USD

SharesGrow Score

42/100

3/7 Pass

SharesGrow Intrinsic Value

There have been 50 recent insider transactions recorded for Alector, Inc. (ALEC), including 20 buys and 28 sells. Total insider buying was valued at $1.23M and total insider selling at $1.32M.

Notable insiders with recent activity include Berkley Neil Lindsay, Rosenthal Arnon, Wong-sarad Grace. Insider transactions can provide insights into how company leadership views the stock's valuation and future prospects.

Insider Transactions — ALEC

Date	Name	Role	Transaction	Shares	Avg. Price	Value	Shares Owned
2026-03-15	Berkley Neil Lindsay	CFO & Chief Business Officer	RSU Award	54,600	-	-	399,260
2026-03-13	Rosenthal Arnon	Chief Executive Officer	RSU Award	116,246	-	-	2,454,422
2026-03-10	Wong-sarad Grace	Principal Accounting Officer	Informative Sell	1,000	$2.65	$2.65K	106,465
2026-03-03	Wong-sarad Grace	Principal Accounting Officer	Informative Sell	3,367	$2.08	$7.01K	107,465
2026-03-02	Rosenthal Arnon	Chief Executive Officer	Informative Sell	81,864	$2.12	$173.82K	2,338,176
2026-03-02	Wong-sarad Grace	Principal Accounting Officer	Informative Sell	8,071	$2.12	$17.14K	110,832
2026-03-02	Berkley Neil Lindsay	CFO & Chief Business Officer	Informative Sell	29,649	$2.12	$62.95K	344,660
2026-02-26	Wong-sarad Grace	Principal Accounting Officer	Informative Sell	4,079	$2.50	$10.2K	118,903
2025-12-05	Wong-sarad Grace	Principal Accounting Officer	Informative Sell	4,753	$1.21	$5.75K	122,982
2025-12-03	Rosenthal Arnon	Chief Executive Officer	Informative Sell	104,347	$1.12	$116.83K	2,420,040
2025-12-03	Kenkare-mitra Sara	President and Head of R&d	Informative Sell	41,687	$1.12	$46.67K	501,652
2025-12-03	Wong-sarad Grace	Principal Accounting Officer	Informative Sell	8,056	$1.12	$9.02K	127,735
2025-12-03	Berkley Neil Lindsay	Chief Bus Ofcr & Interim CFO	Informative Sell	37,261	$1.12	$41.72K	374,309
2025-11-10	Rosenthal Arnon	Chief Executive Officer	RSU Award	522,500	$1.31	$684.48K	522,500
2025-11-10	Wong-sarad Grace	Principal Accounting Officer	RSU Award	48,535	$1.31	$63.58K	48,535
2025-11-10	Berkley Neil Lindsay	Chief Bus Ofcr & Interim CFO	RSU Award	195,000	$1.31	$255.45K	195,000
2025-09-02	Rosenthal Arnon	Chief Executive Officer	Informative Sell	51,562	$2.50	$128.74K	2,350,220
2025-09-02	Kenkare-mitra Sara	President and Head of R&d	Informative Sell	23,638	$2.50	$59.02K	543,339
2025-09-02	Wong-sarad Grace	Principal Accounting Officer	Informative Sell	5,910	$2.50	$14.76K	103,448
2025-09-02	Berkley Neil Lindsay	Principal Financial Officer	Informative Sell	15,842	$2.50	$39.55K	346,570
2025-08-26	Hammond Paula	Director	Informative Sell	14,000	$2.36	$33K	74,909
2025-07-01	Rosenthal Arnon	Chief Executive Officer	RSU Award	45,700	$1.42	$64.89K	45,700
2025-07-01	Kenkare-mitra Sara	President and Head of R&d	RSU Award	18,250	$1.42	$25.92K	18,250
2025-07-01	Berkley Neil Lindsay	Principal Financial Officer	RSU Award	18,000	$1.42	$25.56K	18,000
2025-06-20	Yaffe Kristine	Director	Informative Sell	1,000	$1.44	$1.44K	95,409
2025-06-20	Wong-sarad Grace	Principal Accounting Officer	Unknown	11,552	$23.70	$273.78K	-
2025-06-20	Berkley Neil Lindsay	Principal Financial Officer	Unknown	12,975	$1.11	$14.34K	-
2025-06-11	Desouza Errol B	Director	RSU Award	9,450	$1.63	$15.4K	9,450
2025-06-11	Lavigne Louis J Jr	Director	RSU Award	9,450	$1.63	$15.4K	9,450
2025-06-11	Scheller Richard H	Director	RSU Award	9,450	$1.63	$15.4K	9,450
2025-06-11	Altmeyer Mark	Director	RSU Award	9,450	$1.63	$15.4K	9,450
2025-06-11	Yaffe Kristine	Director	RSU Award	9,450	$1.63	$15.4K	9,450
2025-06-11	Hammond Paula	Director	RSU Award	9,450	$1.63	$15.4K	9,450
2025-06-11	Garofalo Elizabeth A.	Director	RSU Award	9,450	$1.63	$15.4K	9,450
2025-06-02	Grasso Marc	Chief Financial Officer	Informative Sell	16,488	$1.34	$22.07K	296,072
2025-06-02	Rosenthal Arnon	Chief Executive Officer	Informative Sell	52,087	$1.34	$69.71K	2,414,657
2025-06-02	Kenkare-mitra Sara	President and Head of R&d	Informative Sell	23,890	$1.34	$31.97K	512,252
2025-05-02	Scheller Richard H	Director	RSU Award	15,833	-	-	66,666
2025-03-03	Grasso Marc	Chief Financial Officer	Informative Sell	18,091	$1.47	$26.55K	312,560
2025-03-03	Rosenthal Arnon	Chief Executive Officer	Informative Sell	40,330	$1.47	$59.18K	2,466,744
2025-03-03	Romano Gary	Chief Medical Officer	Informative Sell	16,306	$1.47	$23.93K	332,977
2025-03-03	Kenkare-mitra Sara	President and Head of R&d	Informative Sell	29,073	$1.47	$42.66K	536,142
2024-12-02	Grasso Marc	Chief Financial Officer	Informative Sell	16,489	$2.52	$41.54K	330,651
2024-12-02	Rosenthal Arnon	Chief Executive Officer	Informative Sell	52,172	$2.52	$131.44K	2,507,074
2024-12-02	Romano Gary	Chief Medical Officer	Informative Sell	14,892	$2.52	$37.52K	349,283
2024-12-02	Kenkare-mitra Sara	President and Head of R&d	Informative Sell	26,500	$2.52	$66.76K	565,215
2024-10-01	Grasso Marc	Chief Financial Officer	RSU Award	216,400	-	-	347,140
2024-10-01	Rosenthal Arnon	Chief Executive Officer	RSU Award	610,500	-	-	2,559,246
2024-10-01	Romano Gary	Chief Medical Officer	RSU Award	184,380	-	-	364,175
2024-10-01	Kenkare-mitra Sara	President and Head of R&d	RSU Award	300,000	-	-	591,715

■ Informative Buy/Sell — open market transaction (most significant) ■ Uninformative Buy — award, option exercise, conversion ■ Uninformative Sell — tax withholding, award vest sale ■ Neutral — gift, trust, expiry