Alector, Inc. (ALEC)

Latest Insider Confidence Score

2026Q1

47.2
Bearish

Company insider confidence (by quarter)

2019Q1 2026Q1

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Rosenthal Arnon CEO 6,454,762 Dec 3, 2025
Orbimed Advisors Llc 10% Owner 1,906,718 Apr 16, 2020
OrbiMed Capital GP IV LLC 10% Owner 1,906,718 Apr 16, 2020
Kenkare-Mitra Sara President 543,339 Dec 3, 2025
Berkley Neil Lindsay CFO 411,570 Dec 3, 2025

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Mar 3, 2026 Mar 3, 2026 Wong-Sarad Grace Principal Accounting Officer Sell 41.3 -3,367 -3.04% ✓ $7K
Mar 2, 2026 Mar 3, 2026 Wong-Sarad Grace Principal Accounting Officer Sell 26.3 -8,071 -6.79% ✗ $17.1K
Mar 2, 2026 Mar 3, 2026 Rosenthal Arnon CEO Sell 22.5 -81,864 -1.29% ✗ $173.8K
Mar 2, 2026 Mar 3, 2026 Berkley Neil Lindsay CFO Sell 22.5 -29,649 -7.92% ✗ $63K
Feb 26, 2026 Feb 26, 2026 Wong-Sarad Grace Principal Accounting Officer Sell 40.6 -4,079 -3.32% ✓ $10.2K
Dec 5, 2025 Dec 8, 2025 Wong-Sarad Grace Principal Accounting Officer Sell 42.5 -4,753 -3.72% ✓ $5.8K
Dec 3, 2025 Dec 3, 2025 Wong-Sarad Grace Principal Accounting Officer Sell 27.5 -8,056 -5.93% ✗ $9K
Dec 3, 2025 Dec 3, 2025 Rosenthal Arnon CEO Sell 22.5 -104,347 -1.62% ✗ $116.8K
Dec 3, 2025 Dec 3, 2025 Kenkare-Mitra Sara President Sell 26.3 -41,687 -7.67% ✗ $46.7K
Dec 3, 2025 Dec 3, 2025 Berkley Neil Lindsay CFO Sell 26.3 -37,261 -9.05% ✗ $41.7K
Nov 10, 2025 Nov 12, 2025 Wong-Sarad Grace Principal Accounting Officer Neutral 90.0 +32,343 31.26% ✗ -
Nov 10, 2025 Nov 12, 2025 Berkley Neil Lindsay CFO Neutral 90.0 +65,000 18.76% ✗ -
Nov 10, 2025 Nov 12, 2025 Rosenthal Arnon CEO Neutral 82.5 +174,167 2.77% ✗ -
Sep 2, 2025 Sep 4, 2025 Wong-Sarad Grace Principal Accounting Officer Sell 26.3 -5,910 -5.40% ✗ $14.8K
Sep 2, 2025 Sep 4, 2025 Berkley Neil Lindsay Principal Financial Officer Sell 26.3 -15,842 -4.37% ✗ $39.6K
Sep 2, 2025 Sep 4, 2025 Kenkare-Mitra Sara President Sell 22.5 -23,638 -4.17% ✗ $59K
Sep 2, 2025 Sep 4, 2025 Rosenthal Arnon CEO Sell 32.5 -51,562 -0.81% ✗ $128.7K
Aug 26, 2025 Aug 27, 2025 Hammond Paula Director Sell 23.8 -14,000 -15.75% ✓ $33K
Jul 1, 2025 Jul 1, 2025 Berkley Neil Lindsay Principal Financial Officer Neutral 52.5 - 0.00% ✗ -
Jul 1, 2025 Jul 1, 2025 Kenkare-Mitra Sara President Neutral 90.0 +54,725 10.68% ✗ -
Jul 1, 2025 Jul 1, 2025 Rosenthal Arnon CEO Neutral 77.5 +137,125 2.16% ✗ -
Jun 30, 2025 Berkley Neil Lindsay Principal Financial Officer Neutral 52.5 - 0.00% ✗ -
Jun 30, 2025 Wong-Sarad Grace Principal Accounting Officer Neutral 52.5 - 0.00% ✗ -
Jun 20, 2025 Jun 23, 2025 Yaffe Kristine Director Sell 27.5 -1,000 -1.04% ✗ $1.4K
Jun 11, 2025 Jun 12, 2025 Hammond Paula Director Neutral 90.0 +28,700 47.67% ✗ -
Jun 11, 2025 Jun 12, 2025 Yaffe Kristine Director Neutral 90.0 +28,700 42.39% ✗ -
Jun 11, 2025 Jun 12, 2025 GAROFALO ELIZABETH A. Director Neutral 90.0 +28,700 46.86% ✗ -
Jun 11, 2025 Jun 12, 2025 SCHELLER RICHARD H Director Neutral 90.0 +28,700 43.05% ✗ -
Jun 11, 2025 Jun 12, 2025 LAVIGNE LOUIS J JR Director Neutral 90.0 +28,700 35.32% ✗ -
Jun 11, 2025 Jun 12, 2025 DESOUZA ERROL B Director Neutral 90.0 +28,700 69.58% ✗ -
Jun 11, 2025 Jun 12, 2025 Altmeyer Mark Director Neutral 90.0 +28,700 69.58% ✗ -
Jun 2, 2025 Jun 4, 2025 GRASSO MARC CFO Sell 26.3 -16,488 -5.28% ✗ $22.1K
Jun 2, 2025 Jun 4, 2025 Kenkare-Mitra Sara President Sell 26.3 -23,890 -4.46% ✗ $32K
Jun 2, 2025 Jun 4, 2025 Rosenthal Arnon CEO Sell 32.5 -52,087 -0.81% ✗ $69.7K
May 2, 2025 May 2, 2025 SCHELLER RICHARD H Director Neutral 90.0 +15,833 31.15% ✗ -
Mar 3, 2025 Mar 5, 2025 Kenkare-Mitra Sara President Sell 26.3 -29,073 -5.14% ✗ $42.7K
Mar 3, 2025 Mar 5, 2025 Rosenthal Arnon CEO Sell 32.5 -40,330 -0.63% ✗ $59.2K
Mar 3, 2025 Mar 5, 2025 GRASSO MARC CFO Sell 26.3 -18,091 -5.47% ✗ $26.5K
Mar 3, 2025 Mar 5, 2025 Romano Gary Chief Medical Officer Sell 26.3 -16,306 -4.67% ✗ $23.9K
Dec 2, 2024 Dec 3, 2024 GRASSO MARC CFO Sell 26.3 -16,489 -4.75% ✗ $41.5K
Dec 2, 2024 Dec 3, 2024 Rosenthal Arnon CEO Sell 32.5 -52,172 -0.80% ✗ $131.4K
Dec 2, 2024 Dec 3, 2024 Romano Gary Chief Medical Officer Sell 26.3 -14,892 -4.09% ✗ $37.5K
Dec 2, 2024 Dec 3, 2024 Kenkare-Mitra Sara President Sell 22.5 -26,500 -4.48% ✗ $66.8K
Aug 2, 2024 Oct 10, 2024 SCHELLER RICHARD H Director Neutral 90.0 +15,833 45.24% ✗ -
Oct 1, 2024 Oct 2, 2024 GRASSO MARC CFO Neutral 90.0 +216,400 165.52% ✗ -
Oct 1, 2024 Oct 2, 2024 Kenkare-Mitra Sara President Neutral 90.0 +300,000 102.84% ✗ -
Oct 1, 2024 Oct 2, 2024 Rosenthal Arnon CEO Neutral 90.0 +610,500 10.38% ✗ -
Oct 1, 2024 Oct 2, 2024 Romano Gary Chief Medical Officer Neutral 90.0 +184,380 102.55% ✗ -
Sep 3, 2024 Sep 4, 2024 GRASSO MARC CFO Sell 26.3 -7,297 -5.29% ✗ $35.6K
Sep 3, 2024 Sep 4, 2024 Rosenthal Arnon CEO Sell 40.0 -26,499 -0.45% ✗ $129.4K
Sep 3, 2024 Sep 4, 2024 Kenkare-Mitra Sara President Sell 22.5 -13,926 -4.56% ✗ $68K
Sep 3, 2024 Sep 4, 2024 Romano Gary Chief Medical Officer Sell 26.3 -8,478 -4.50% ✗ $41.4K
Aug 22, 2024 Aug 23, 2024 SCHELLER RICHARD H Director Sell 22.5 -44,250 -55.84% ✗ $228.4K
Aug 12, 2024 Aug 13, 2024 Hammond Paula Director Sell 25.0 -10,500 -14.85% ✓ $53.2K
Aug 12, 2024 Aug 13, 2024 Yaffe Kristine Director Sell 36.3 -5,000 -6.88% ✓ $25.3K
Jun 12, 2024 Jun 12, 2024 LAVIGNE LOUIS J JR Director Neutral 90.0 +35,000 75.66% ✗ -
Jun 12, 2024 Jun 12, 2024 Yaffe Kristine Director Neutral 90.0 +35,000 92.82% ✗ -
Jun 12, 2024 Jun 12, 2024 GAROFALO ELIZABETH A. Director Neutral 90.0 +35,000 133.33% ✗ -
Jun 12, 2024 Jun 12, 2024 SCHELLER RICHARD H Director Neutral 90.0 +35,000 79.10% ✗ -
Jun 12, 2024 Jun 12, 2024 Wehner David M. Director Neutral 90.0 +35,000 43.57% ✗ -
Jun 12, 2024 Jun 12, 2024 Hammond Paula Director Neutral 90.0 +35,000 98.01% ✗ -
Jun 3, 2024 Jun 4, 2024 Romano Gary Chief Medical Officer Sell 26.3 -8,040 -4.10% ✗ $38.6K
Jun 3, 2024 Jun 4, 2024 Kenkare-Mitra Sara President Sell 22.5 -13,206 -4.14% ✗ $63.4K
Jun 3, 2024 Jun 4, 2024 Rosenthal Arnon CEO Sell 40.0 -25,135 -0.42% ✗ $120.6K
Jun 3, 2024 Jun 4, 2024 GRASSO MARC CFO Sell 26.3 -6,920 -4.77% ✗ $33.2K
May 29, 2024 May 31, 2024 Polaris Venture Management Co. VI, L.L.C. 10% Owner Neutral 27.5 -500,000 -4.83% ✗ -
Apr 30, 2024 May 2, 2024 Polaris Venture Management Co. VI, L.L.C. 10% Owner Neutral 27.5 -500,000 -4.61% ✗ -
Mar 19, 2024 Mar 21, 2024 Altmeyer Mark Director Neutral 90.0 +41,250 100.00% ✗ -
Mar 19, 2024 Mar 21, 2024 DESOUZA ERROL B Director Neutral 90.0 +41,250 100.00% ✗ -
Mar 21, 2024 Altmeyer Mark Director Neutral 52.5 - 0.00% ✗ -
Mar 21, 2024 DESOUZA ERROL B Director Neutral 52.5 - 0.00% ✗ -
Mar 4, 2024 Mar 5, 2024 GRASSO MARC CFO Sell 26.3 -5,716 -3.79% ✗ $39.6K
Mar 4, 2024 Mar 5, 2024 Rosenthal Arnon CEO Sell 40.0 -18,837 -0.32% ✗ $130.4K
Mar 4, 2024 Mar 5, 2024 Romano Gary Chief Medical Officer Sell 26.3 -6,001 -2.97% ✗ $41.6K
Mar 4, 2024 Mar 5, 2024 Kenkare-Mitra Sara President Sell 22.5 -10,169 -3.09% ✗ $70.4K
Jul 15, 2023 Feb 14, 2024 SCHELLER RICHARD H Director Neutral 90.0 +8,541 23.92% ✗ -
Dec 4, 2023 Dec 6, 2023 GRASSO MARC CFO Sell 26.3 -4,574 -2.95% ✗ $25.4K
Dec 4, 2023 Dec 6, 2023 Romano Gary Chief Medical Officer Sell 26.3 -5,035 -2.43% ✗ $28K
Dec 5, 2023 Dec 6, 2023 GAROFALO ELIZABETH A. Director Neutral 27.5 -9,459 -26.49% ✗ -
Dec 4, 2023 Dec 6, 2023 Rosenthal Arnon CEO Sell 40.0 -23,831 -0.40% ✗ $132.5K
Dec 4, 2023 Dec 6, 2023 Kenkare-Mitra Sara President Sell 22.5 -12,519 -3.67% ✗ $69.6K
Oct 1, 2023 Oct 3, 2023 Romano Gary Chief Medical Officer Neutral 90.0 +108,000 108.71% ✗ -
Oct 1, 2023 Oct 3, 2023 GRASSO MARC CFO Neutral 90.0 +123,000 381.43% ✗ -
Oct 1, 2023 Oct 3, 2023 Kenkare-Mitra Sara President Neutral 90.0 +163,600 91.94% ✗ -
Oct 1, 2023 Oct 3, 2023 Rosenthal Arnon CEO Neutral 85.0 +397,600 7.13% ✗ -
Sep 11, 2023 Sep 13, 2023 Polaris Venture Management Co. VI, L.L.C. 10% Owner Sell 17.5 -500,000 -4.40% ✗ $3M
Sep 11, 2023 Sep 13, 2023 MCGUIRE TERRANCE Director Sell 17.5 -500,000 -4.38% ✗ $3M
Sep 5, 2023 Sep 6, 2023 Rosenthal Arnon CEO Sell 51.3 -5,647 -0.10% ✗ $29.3K
Sep 5, 2023 Sep 6, 2023 Kenkare-Mitra Sara President Sell 26.3 -6,214 -3.37% ✗ $32.3K
Sep 5, 2023 Sep 6, 2023 Romano Gary Chief Medical Officer Sell 26.3 -2,771 -2.71% ✗ $14.4K
Sep 5, 2023 Sep 6, 2023 GRASSO MARC CFO Sell 27.5 -1,114 -3.34% ✗ $5.8K
Aug 22, 2023 Aug 24, 2023 MCGUIRE TERRANCE Director Neutral 27.5 -480,438 -3.99% ✗ -
Aug 22, 2023 Aug 24, 2023 Polaris Venture Management Co. VI, L.L.C. 10% Owner Neutral 27.5 -500,000 -4.22% ✗ -
Jun 14, 2023 Jun 15, 2023 Gerngross Tillman U. Director Neutral 77.5 +26,250 1.00% ✗ -
Jun 14, 2023 Jun 15, 2023 MCGUIRE TERRANCE Director Neutral 60.0 +26,250 0.22% ✗ -
Jun 14, 2023 Jun 15, 2023 Wehner David M. Director Neutral 90.0 +26,250 48.54% ✗ -
Jun 14, 2023 Jun 15, 2023 Yaffe Kristine Director Neutral 90.0 +26,250 277.51% ✗ -
Jun 14, 2023 Jun 15, 2023 LAVIGNE LOUIS J JR Director Neutral 90.0 +26,250 131.18% ✗ -
Jun 14, 2023 Jun 15, 2023 SCHELLER RICHARD H Director Neutral 90.0 +26,250 277.51% ✗ -
Jun 14, 2023 Jun 15, 2023 Hammond Paula Director Neutral 90.0 +26,250 277.51% ✗ -