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Alector, Inc. — Insider Transactions

Form 4 filings by directors, officers, and 10%+ shareholders

SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.

Overview All Filings Annual Quarterly Insiders
Insider Title Type Shares Price Value Owns After Date
Wong-Sarad Grace Principal Accounting Officer Sale 4,753 $1.21 $5,751 122,982 Dec 5, 2025
Wong-Sarad Grace Principal Accounting Officer Sale 8,056 $1.12 $9,023 127,735 Dec 3, 2025
Rosenthal Arnon Chief Executive Officer Sale 104,347 $1.12 $116,869 2,420,040 Dec 3, 2025
Kenkare-Mitra Sara President and Head of R&D Sale 41,687 $1.12 $46,689 501,652 Dec 3, 2025
Berkley Neil Lindsay Chief Bus Ofcr & Interim CFO Sale 37,261 $1.12 $41,732 374,309 Dec 3, 2025
Wong-Sarad Grace Principal Accounting Officer Award / Grant 32,343 135,791 Nov 10, 2025
Berkley Neil Lindsay Chief Bus Ofcr & Interim CFO Award / Grant 65,000 411,570 Nov 10, 2025
Rosenthal Arnon Chief Executive Officer Award / Grant 174,167 2,524,387 Nov 10, 2025
Wong-Sarad Grace Principal Accounting Officer Sale 5,910 $2.50 $14,775 103,448 Sep 2, 2025
Berkley Neil Lindsay Principal Financial Officer Sale 15,842 $2.50 $39,605 346,570 Sep 2, 2025
Kenkare-Mitra Sara President and Head of R&D Sale 23,638 $2.50 $59,095 543,339 Sep 2, 2025
Rosenthal Arnon Chief Executive Officer Sale 51,562 $2.50 $128,905 2,350,220 Sep 2, 2025
Hammond Paula Sale 14,000 $2.36 $33,040 74,909 Aug 26, 2025
Kenkare-Mitra Sara President and Head of R&D Award / Grant 54,725 566,977 Jul 1, 2025
Rosenthal Arnon Chief Executive Officer Award / Grant 137,125 2,551,782 Jul 1, 2025
Yaffe Kristine Sale 1,000 $1.44 $1,440 95,409 Jun 20, 2025
Hammond Paula Award / Grant 28,700 88,909 Jun 11, 2025
Yaffe Kristine Award / Grant 28,700 96,409 Jun 11, 2025
GAROFALO ELIZABETH A. Award / Grant 28,700 89,950 Jun 11, 2025
SCHELLER RICHARD H Award / Grant 28,700 95,366 Jun 11, 2025
LAVIGNE LOUIS J JR Award / Grant 28,700 99,409 Jun 11, 2025
DESOUZA ERROL B Award / Grant 28,700 69,950 Jun 11, 2025
Altmeyer Mark Award / Grant 28,700 69,950 Jun 11, 2025
GRASSO MARC Chief Financial Officer Sale 16,488 $1.34 $22,094 296,072 Jun 2, 2025
Kenkare-Mitra Sara President and Head of R&D Sale 23,890 $1.34 $32,013 512,252 Jun 2, 2025
Rosenthal Arnon Chief Executive Officer Sale 52,087 $1.34 $69,797 2,414,657 Jun 2, 2025
SCHELLER RICHARD H Award / Grant 15,833 66,666 May 2, 2025
GRASSO MARC Chief Financial Officer Sale 18,091 $1.47 $26,594 312,560 Mar 3, 2025
Kenkare-Mitra Sara President and Head of R&D Sale 29,073 $1.47 $42,737 536,142 Mar 3, 2025
Rosenthal Arnon Chief Executive Officer Sale 40,330 $1.47 $59,285 2,466,744 Mar 3, 2025
Romano Gary Chief Medical Officer Sale 16,306 $1.47 $23,970 332,977 Mar 3, 2025
GRASSO MARC Chief Financial Officer Sale 16,489 $2.52 $41,552 330,651 Dec 2, 2024
Rosenthal Arnon Chief Executive Officer Sale 52,172 $2.52 $131,473 2,507,074 Dec 2, 2024
Kenkare-Mitra Sara President and Head of R&D Sale 26,500 $2.52 $66,780 565,215 Dec 2, 2024
Romano Gary Chief Medical Officer Sale 14,892 $2.52 $37,528 349,283 Dec 2, 2024
GRASSO MARC Chief Financial Officer Award / Grant 216,400 347,140 Oct 1, 2024
Rosenthal Arnon Chief Executive Officer Award / Grant 610,500 2,559,246 Oct 1, 2024
Kenkare-Mitra Sara President and Head of R&D Award / Grant 300,000 591,715 Oct 1, 2024
Romano Gary Chief Medical Officer Award / Grant 184,380 364,175 Oct 1, 2024
GRASSO MARC Chief Financial Officer Sale 7,297 $4.88 $35,609 130,740 Sep 3, 2024
Rosenthal Arnon Chief Executive Officer Sale 26,499 $4.88 $129,315 1,948,746 Sep 3, 2024
Kenkare-Mitra Sara President and Head of R&D Sale 13,926 $4.88 $67,959 291,715 Sep 3, 2024
Romano Gary Chief Medical Officer Sale 8,478 $4.88 $41,373 179,795 Sep 3, 2024
SCHELLER RICHARD H Sale 44,250 $5.16 $228,330 35,000 Aug 22, 2024
Hammond Paula Sale 10,500 $5.06 $53,130 60,209 Aug 12, 2024
Yaffe Kristine Sale 5,000 $5.06 $25,300 67,709 Aug 12, 2024
SCHELLER RICHARD H Award / Grant 15,833 50,833 Aug 2, 2024
LAVIGNE LOUIS J JR Award / Grant 35,000 70,709 Jun 12, 2024
Yaffe Kristine Award / Grant 35,000 72,709 Jun 12, 2024
GAROFALO ELIZABETH A. Award / Grant 35,000 61,250 Jun 12, 2024