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Alector, Inc. (ALEC)

Alector, Inc. at a glance — key fundamentals, SEC filings, insider buying and selling, and earnings dates.

Alector, Inc. (ALEC) is a Biotechnology company based in US with a market capitalization of $242.6M. Revenue declined 79.1% year-over-year and free cash flow was negative at -$184.1M. This page tracks ALEC's SEC filings, insider buying and selling, earnings dates, and key fundamentals in one place.

US · 175 employees · IPO Feb 7, 2019

Valuation

Valuation & price

$2.16 · as of May 17, 2026 · -34.9% vs 52w high

—

P/E ratio

Latest-FY diluted EPS

7.92

P/B ratio

Market cap ÷ book equity

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Dividend yield

Price — last 12 months

$3.22$2.18$1.14Jul 25Dec 25Jul 26Jul 7, 25$1.44Jul 9, 25$1.65Jul 11, 25$1.61Jul 15, 25$1.55Jul 17, 25$1.67Jul 21, 25$1.62Jul 23, 25$1.78Jul 25, 25$1.76Jul 29, 25$1.61Jul 31, 25$1.49Aug 4, 25$1.55Aug 6, 25$1.43Aug 11, 25$2.23Aug 13, 25$2.18Aug 15, 25$2.25Aug 19, 25$2.16Aug 21, 25$2.27Aug 25, 25$2.34Aug 27, 25$2.40Aug 29, 25$2.35Sep 3, 25$2.79Sep 5, 25$3.01Sep 9, 25$2.80Sep 11, 25$2.87Sep 16, 25$2.76Sep 18, 25$3.13Sep 22, 25$3.18Sep 24, 25$3.16Sep 26, 25$3.10Sep 30, 25$2.96Oct 2, 25$3.16Oct 6, 25$3.18Oct 8, 25$3.08Oct 10, 25$3.02Oct 14, 25$2.99Oct 16, 25$3.22Oct 21, 25$3.21Oct 23, 25$1.47Oct 27, 25$1.50Oct 29, 25$1.55Oct 31, 25$1.47Nov 4, 25$1.32Nov 6, 25$1.30Nov 10, 25$1.31Nov 12, 25$1.34Nov 14, 25$1.24Nov 18, 25$1.27Nov 20, 25$1.20Nov 25, 25$1.28Nov 28, 25$1.33Dec 2, 25$1.14Dec 4, 25$1.21Dec 8, 25$1.22Dec 10, 25$1.30Dec 12, 25$1.49Dec 16, 25$1.39Dec 18, 25$1.39Dec 22, 25$1.45Dec 24, 25$1.45Dec 29, 25$1.52Jan 2, 26$1.53Jan 6, 26$1.69Jan 8, 26$1.77Jan 12, 26$1.84Jan 14, 26$1.85Jan 16, 26$1.84Jan 21, 26$1.92Jan 23, 26$1.94Jan 27, 26$1.95Jan 29, 26$1.91Feb 2, 26$1.99Feb 4, 26$1.93Feb 9, 26$1.96Feb 11, 26$1.92Feb 13, 26$1.87Feb 18, 26$1.98Feb 20, 26$1.99Feb 24, 26$2.19Feb 26, 26$2.56Mar 2, 26$2.21Mar 4, 26$2.15Mar 6, 26$2.00Mar 10, 26$2.38Mar 12, 26$2.23Mar 17, 26$2.23Mar 19, 26$2.06Mar 23, 26$2.06Mar 25, 26$2.17Mar 27, 26$2.00Mar 31, 26$2.15Apr 2, 26$2.41Apr 7, 26$2.47Apr 9, 26$2.40Apr 13, 26$2.33Apr 15, 26$2.58Apr 17, 26$2.57Apr 22, 26$2.45Apr 24, 26$2.41Apr 28, 26$2.39Apr 30, 26$2.37May 4, 26$2.51May 6, 26$2.57May 8, 26$2.10May 12, 26$2.16May 14, 26$2.30May 18, 26$2.12May 20, 26$2.12May 22, 26$2.21May 28, 26$2.15Jun 1, 26$2.07Jun 3, 26$1.78Jun 5, 26$1.64Jun 9, 26$1.63Jun 11, 26$1.57Jun 15, 26$1.48Jun 17, 26$1.56Jun 22, 26$1.78Jun 24, 26$1.79Jun 26, 26$1.86Jul 2, 26$2.06
$1.1452-week range$3.32
Loading valuation history…

Fundamentals

Key fundamentals

$242.6M

Market cap

-79.1%

Revenue growth (YoY)

54.1%

Gross margin

-$184.1M

Free cash flow (USD)

-$219.8M

Net debt

Net cash position

6.6%

Share dilution

0/5

Graham criteria passed

Defensive-investor screen

Healthcare

Sector

Trajectory

Long-term trends

Revenue by year

2016 → 2025

FY 2016$416.0KFY 2017$3.7MFY 2018$27.7MFY 2019$21.2MFY 2020$21.1MFY 2021$207.1MFY 2022$133.6MFY 2023$97.1MFY 2024$100.6MFY 2025$21.0M
$416K$21M

Free cash flow by year

2016 → 2025

FY 2016$-15.2MFY 2017$-18.6MFY 2018$125.6MFY 2019$-114.6MFY 2020$-171.8MFY 2021$295.3MFY 2022$-24.4MFY 2023$-186.5MFY 2024$-231.2MFY 2025$-184.1M
-$15.2M-$184.1M

Gross margin by year

2021 → 2025

FY 20218.5%FY 2022100.0%FY 202390.9%FY 2024100.0%FY 202554.1%
8.5%54.1%

Value screen

Graham defensive-investor tests

Computing the scorecard — refreshing any stale inputs…

0

Insider buys · 90 days

4

Insider sells · 90 days

Earnings

Last report: 10-Q filed May 7, 2026

Next expected: not yet scheduled

On the tape

Recent SEC & insider activity

  • 8-K eventAnnual Meeting ResultsJun 17, 2026Filing
  • Insider sellInsider Sell $38KBerkley Neil Lindsay · CFO & Chief Business Officer · $38.2KJun 3, 2026Filing
  • Insider sellInsider Sell $18K · 10b5-1 PlanWong-Sarad Grace · Principal Accounting Officer · $17.8KJun 3, 2026Filing
  • Insider sellInsider Sell $172KRosenthal Arnon · Director, Chief Executive Officer · $172.2KJun 3, 2026Filing
  • 8-K eventEarnings ReleaseMay 7, 2026Filing
  • Quarterly report10-Q FiledMay 7, 2026Filing
  • 8-K eventCommon Stock Sales AgreementMay 7, 2026Filing
  • Insider sellInsider Sell $5K · 10b5-1 PlanWong-Sarad Grace · Principal Accounting Officer · $4.8KApr 17, 2026Filing

Questions

Frequently asked questions

What is Alector, Inc.'s market cap?

Alector, Inc. (ALEC) has a market capitalization of $242.6M.

What is ALEC's P/E ratio?

A meaningful P/E ratio is not available for ALEC — the company's latest fiscal-year earnings per share is zero, negative, or not yet cached.

What is ALEC's price-to-book (P/B) ratio?

ALEC trades at 7.92 times book value per share.

Are insiders buying ALEC stock?

SEC Form 4 filings show no open-market insider buys at Alector, Inc. in the last 90 days (4 sells).

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Timeline

Every filing, insider trade & earnings on a price-anchored timeline

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News

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Data: SEC EDGAR filings and cached fundamental data; prices and ratios use the most recent cached quote and statements (may lag by up to a day). Educational and research purposes only. Not investment advice.