Stocks · Health care · Biological Products, (No Diagnostic Substances)

Alector, Inc.

ALEC Clue Score15
United States Fiscal year ends December CIK 0001653087
2.08
+2.97%
Close, 9 Oct 2026 · USD

Price, with every insider trade on it

Closing prices, 12 months · point at a dot for who traded, or at the line for the close
2.08 on 9 Oct 2026
3 2 1 Oct 2025 Apr 2026 Oct 2026 13 Oct 2025 $3.04 14 Oct 2025 $2.99 15 Oct 2025 $3.19 16 Oct 2025 $3.22 17 Oct 2025 $3.04 20 Oct 2025 $3.31 21 Oct 2025 $3.21 22 Oct 2025 $1.61 23 Oct 2025 $1.47 24 Oct 2025 $1.50 27 Oct 2025 $1.50 28 Oct 2025 $1.50 29 Oct 2025 $1.55 30 Oct 2025 $1.52 31 Oct 2025 $1.47 3 Nov 2025 $1.44 4 Nov 2025 $1.32 5 Nov 2025 $1.26 6 Nov 2025 $1.30 7 Nov 2025 $1.28 10 Nov 2025 $1.31 11 Nov 2025 $1.36 12 Nov 2025 $1.34 13 Nov 2025 $1.20 14 Nov 2025 $1.24 17 Nov 2025 $1.24 18 Nov 2025 $1.27 19 Nov 2025 $1.22 20 Nov 2025 $1.20 21 Nov 2025 $1.24 24 Nov 2025 $1.28 25 Nov 2025 $1.28 26 Nov 2025 $1.35 28 Nov 2025 $1.33 1 Dec 2025 $1.23 2 Dec 2025 $1.14 3 Dec 2025 $1.14 4 Dec 2025 $1.21 5 Dec 2025 $1.22 8 Dec 2025 $1.22 9 Dec 2025 $1.28 10 Dec 2025 $1.30 11 Dec 2025 $1.46 12 Dec 2025 $1.49 15 Dec 2025 $1.42 16 Dec 2025 $1.39 17 Dec 2025 $1.35 18 Dec 2025 $1.39 19 Dec 2025 $1.40 22 Dec 2025 $1.45 23 Dec 2025 $1.41 24 Dec 2025 $1.45 26 Dec 2025 $1.45 29 Dec 2025 $1.52 30 Dec 2025 $1.52 31 Dec 2025 $1.56 2 Jan 2026 $1.53 5 Jan 2026 $1.60 6 Jan 2026 $1.69 7 Jan 2026 $1.76 8 Jan 2026 $1.77 9 Jan 2026 $1.86 12 Jan 2026 $1.84 13 Jan 2026 $1.92 14 Jan 2026 $1.85 15 Jan 2026 $1.82 16 Jan 2026 $1.84 20 Jan 2026 $1.83 21 Jan 2026 $1.92 22 Jan 2026 $1.92 23 Jan 2026 $1.94 26 Jan 2026 $1.93 27 Jan 2026 $1.95 28 Jan 2026 $1.91 29 Jan 2026 $1.91 30 Jan 2026 $1.89 2 Feb 2026 $1.99 3 Feb 2026 $1.93 4 Feb 2026 $1.93 5 Feb 2026 $1.82 6 Feb 2026 $1.96 9 Feb 2026 $1.96 10 Feb 2026 $1.95 11 Feb 2026 $1.92 12 Feb 2026 $1.90 13 Feb 2026 $1.87 17 Feb 2026 $1.97 18 Feb 2026 $1.98 19 Feb 2026 $2.01 20 Feb 2026 $1.99 23 Feb 2026 $2.10 24 Feb 2026 $2.19 25 Feb 2026 $2.39 26 Feb 2026 $2.56 27 Feb 2026 $2.43 2 Mar 2026 $2.21 3 Mar 2026 $2.11 4 Mar 2026 $2.15 5 Mar 2026 $1.98 6 Mar 2026 $2.00 9 Mar 2026 $2.19 10 Mar 2026 $2.38 11 Mar 2026 $2.32 12 Mar 2026 $2.23 13 Mar 2026 $2.20 16 Mar 2026 $2.21 17 Mar 2026 $2.23 18 Mar 2026 $2.05 19 Mar 2026 $2.06 20 Mar 2026 $2.05 23 Mar 2026 $2.06 24 Mar 2026 $2.08 25 Mar 2026 $2.17 26 Mar 2026 $2.12 27 Mar 2026 $2.00 30 Mar 2026 $2.02 31 Mar 2026 $2.15 1 Apr 2026 $2.53 2 Apr 2026 $2.41 6 Apr 2026 $2.35 7 Apr 2026 $2.47 8 Apr 2026 $2.42 9 Apr 2026 $2.40 10 Apr 2026 $2.45 13 Apr 2026 $2.33 14 Apr 2026 $2.41 15 Apr 2026 $2.58 16 Apr 2026 $2.55 17 Apr 2026 $2.57 20 Apr 2026 $2.71 21 Apr 2026 $2.46 22 Apr 2026 $2.45 23 Apr 2026 $2.43 24 Apr 2026 $2.41 27 Apr 2026 $2.35 28 Apr 2026 $2.39 29 Apr 2026 $2.30 30 Apr 2026 $2.37 1 May 2026 $2.36 4 May 2026 $2.51 5 May 2026 $2.57 6 May 2026 $2.57 7 May 2026 $2.44 8 May 2026 $2.10 11 May 2026 $2.05 12 May 2026 $2.16 13 May 2026 $2.15 14 May 2026 $2.30 15 May 2026 $2.16 18 May 2026 $2.12 19 May 2026 $2.11 20 May 2026 $2.12 21 May 2026 $2.21 22 May 2026 $2.21 26 May 2026 $2.19 27 May 2026 $2.21 28 May 2026 $2.15 29 May 2026 $2.16 1 Jun 2026 $2.07 2 Jun 2026 $1.95 3 Jun 2026 $1.78 4 Jun 2026 $1.81 5 Jun 2026 $1.64 8 Jun 2026 $1.64 9 Jun 2026 $1.63 10 Jun 2026 $1.52 11 Jun 2026 $1.57 12 Jun 2026 $1.53 15 Jun 2026 $1.48 16 Jun 2026 $1.54 17 Jun 2026 $1.56 18 Jun 2026 $1.75 22 Jun 2026 $1.78 23 Jun 2026 $1.83 24 Jun 2026 $1.79 25 Jun 2026 $1.85 26 Jun 2026 $1.86 29 Jun 2026 $2.08 30 Jun 2026 $2.01 1 Jul 2026 $2.01 2 Jul 2026 $2.06 6 Jul 2026 $1.94 7 Jul 2026 $1.93 8 Jul 2026 $1.83 9 Jul 2026 $1.64 10 Jul 2026 $1.61 13 Jul 2026 $1.51 14 Jul 2026 $1.39 15 Jul 2026 $1.50 16 Jul 2026 $1.47 17 Jul 2026 $1.50 20 Jul 2026 $1.43 21 Jul 2026 $1.54 22 Jul 2026 $1.53 23 Jul 2026 $1.49 24 Jul 2026 $1.48 27 Jul 2026 $1.51 28 Jul 2026 $1.52 29 Jul 2026 $1.52 30 Jul 2026 $1.62 31 Jul 2026 $1.51 3 Aug 2026 $1.51 4 Aug 2026 $1.54 5 Aug 2026 $1.49 6 Aug 2026 $1.83 7 Aug 2026 $1.78 10 Aug 2026 $1.69 11 Aug 2026 $2.09 12 Aug 2026 $2.15 13 Aug 2026 $2.04 14 Aug 2026 $1.96 17 Aug 2026 $2.05 18 Aug 2026 $2.21 19 Aug 2026 $2.43 20 Aug 2026 $2.26 21 Aug 2026 $2.36 24 Aug 2026 $2.30 25 Aug 2026 $2.36 26 Aug 2026 $2.46 27 Aug 2026 $2.39 28 Aug 2026 $2.34 31 Aug 2026 $2.26 1 Sep 2026 $2.40 2 Sep 2026 $2.72 3 Sep 2026 $2.51 4 Sep 2026 $2.46 8 Sep 2026 $2.47 9 Sep 2026 $2.27 10 Sep 2026 $2.14 11 Sep 2026 $2.14 14 Sep 2026 $2.21 15 Sep 2026 $2.04 16 Sep 2026 $1.93 17 Sep 2026 $1.85 18 Sep 2026 $1.91 21 Sep 2026 $1.93 22 Sep 2026 $2.01 23 Sep 2026 $2.02 24 Sep 2026 $1.92 25 Sep 2026 $1.95 28 Sep 2026 $1.92 29 Sep 2026 $1.87 30 Sep 2026 $1.85 1 Oct 2026 $1.86 2 Oct 2026 $1.81 5 Oct 2026 $1.99 6 Oct 2026 $1.81 7 Oct 2026 $1.92 8 Oct 2026 $2.02 9 Oct 2026 $2.08 Wong-Sarad Grace Principal Accounting Officer Sold at will $9.02K 3 Dec 2025 · at $1.12 · 5.9% of stake Berkley Neil Lindsay Chief Bus Ofcr & Interim CFO Sold at will $41.72K 3 Dec 2025 · at $1.12 · 9.1% of stake Kenkare-Mitra Sara President and Head of R&D Sold at will $46.67K 3 Dec 2025 · at $1.12 · 7.7% of stake Rosenthal Arnon Chief Executive Officer Sold at will $116.83K 3 Dec 2025 · at $1.12 · 4.1% of stake Wong-Sarad Grace Principal Accounting Officer Sold at will $5.75K 5 Dec 2025 · at $1.21 · 3.7% of stake Wong-Sarad Grace Principal Accounting Officer Sold on a plan $10.20K 26 Feb 2026 · at $2.50 · 3.3% of stake Wong-Sarad Grace Principal Accounting Officer Sold at will $17.14K 2 Mar 2026 · at $2.12 · 6.8% of stake Berkley Neil Lindsay CFO & Chief Business Officer Sold at will $62.95K 2 Mar 2026 · at $2.12 · 7.9% of stake Rosenthal Arnon Chief Executive Officer Sold at will $173.82K 2 Mar 2026 · at $2.12 · 3.4% of stake Wong-Sarad Grace Principal Accounting Officer Sold on a plan $7.01K 3 Mar 2026 · at $2.08 · 3.0% of stake Wong-Sarad Grace Principal Accounting Officer Sold on a plan $2.65K 10 Mar 2026 · at $2.65 · 0.9% of stake Wong-Sarad Grace Principal Accounting Officer Sold on a plan $4.82K 16 Apr 2026 · at $2.65 · 1.7% of stake Wong-Sarad Grace Principal Accounting Officer Sold at will $11.27K 2 Jun 2026 · at $1.97 · 5.5% of stake Berkley Neil Lindsay CFO & Chief Business Officer Sold at will $38.22K 2 Jun 2026 · at $1.97 · 4.8% of stake Rosenthal Arnon Chief Executive Officer Sold at will $172.19K 2 Jun 2026 · at $1.97 · 3.6% of stake Wong-Sarad Grace Principal Accounting Officer Sold at will $6.54K 3 Jun 2026 · at $1.88 · 3.5% of stake Wong-Sarad Grace Principal Accounting Officer Sold at will $1.80K 2 Sep 2026 · at $2.75 · 0.6% of stake Wong-Sarad Grace Principal Accounting Officer Sold at will $13.77K 3 Sep 2026 · at $2.67 · 4.5% of stake Berkley Neil Lindsay CFO & Chief Business Officer Sold at will $77.95K 3 Sep 2026 · at $2.66 · 7.7% of stake Rosenthal Arnon Chief Executive Officer Sold at will $193.47K 3 Sep 2026 · at $2.66 · 3.1% of stake Wong-Sarad Grace Principal Accounting Officer Sold at will $9.09K 4 Sep 2026 · at $2.51 · 3.3% of stake
0 buys17 sales at will4 planned sales

Key numbers

Fiscal year 2025, ended 31 Dec 2025, as filed
Revenue
$21.05M
Net income
$142.93M
Free cash flow
$184.07M
Operating margin
-741.3%
Net margin
-679.2%
Return on equity
-466.3%
Return on capital
-305.5%
Debt to equity
0.32
Revenue growth, 1 yr
-79.1%
Revenue growth, 5 yr
-0.1% a year

Revenue and net income

Fiscal years, as filed with the SEC · point at a year for the detail
21M -190M FY20 Fiscal year 2020 Revenue $21.10M Net income $190.23M Margin -901.6% 207M -36M FY21 Fiscal year 2021 Revenue $207.09M Net income $36.33M Margin -17.5% · growth +881.5% 134M -133M FY22 Fiscal year 2022 Revenue $133.62M Net income $133.31M Margin -99.8% · growth -35.5% 97M -130M FY23 Fiscal year 2023 Revenue $97.06M Net income $130.39M Margin -134.3% · growth -27.4% 101M -119M FY24 Fiscal year 2024 Revenue $100.56M Net income $119.05M Margin -118.4% · growth +3.6% 21M -143M FY25 Fiscal year 2025 Revenue $21.05M Net income $142.93M Margin -679.2% · growth -79.1%
RevenueNet incomeLoss

Latest insider transactions

From Form 4, most recent first
All of them →
DateInsiderTypeValueOf own stake
4 Sep 2026 Wong-Sarad Grace
Principal Accounting Officer
Sold at will $9.09K 3.3%
3 Sep 2026 Rosenthal Arnon
Chief Executive Officer
Sold at will $193.47K 3.1%
3 Sep 2026 Berkley Neil Lindsay
CFO & Chief Business Officer
Sold at will $77.95K 7.7%
3 Sep 2026 Wong-Sarad Grace
Principal Accounting Officer
Sold at will $13.77K 4.5%
2 Sep 2026 Wong-Sarad Grace
Principal Accounting Officer
Sold at will $1.80K 0.6%
3 Jun 2026 Wong-Sarad Grace
Principal Accounting Officer
Sold at will $6.54K 3.5%