Alector (ALEC) Stock Analysis & Price (Updated Oct 16, 2026, 4:00 PM ET)
Updated Oct 16, 2026, 4:00 PM ET
ALEC slides 3.7% to $1.84. Closed at $1.84, -3.66% vs the prior close of $1.91. Day range $1.79–$2.18, opened at $2.18.
ALEC daily analysis — what happened
A plain-English, data-only note written after every US trading day. Newest first; older days stay archived below.
Oct 16, 2026 — ALEC slides 3.7% to $1.84
- Closed at $1.84, -3.66% vs the prior close of $1.91. Day range $1.79–$2.18, opened at $2.18.
- Volume was 5.15M shares, 1.4x its 50-day average of 3.72M.
- Price is -12.1% vs its 50-day average ($2.09) and -8.8% vs its 200-day average ($2.02).
- 52-week range $1.09–$3.40; today's close sits at 32% of that range, 45.9% below the 52-week high.
Oct 15, 2026 — ALEC rises 1.6% to $1.91
- Closed at $1.91, +1.60% vs the prior close of $1.88. Day range $1.85–$1.95, opened at $1.92.
- Volume was 1.63M shares, 0.4x its 50-day average of 3.70M — lighter than usual.
- Price is -8.8% vs its 50-day average ($2.09) and -5.3% vs its 200-day average ($2.02).
- 52-week range $1.09–$3.40; today's close sits at 35% of that range, 43.8% below the 52-week high.
Oct 14, 2026 — ALEC rises 0.5% to $1.88
- Closed at $1.88, +0.53% vs the prior close of $1.87. Day range $1.82–$1.92, opened at $1.84.
- Volume was 2.91M shares, 0.8x its 50-day average of 3.65M.
- Price is -9.9% vs its 50-day average ($2.09) and -6.7% vs its 200-day average ($2.01).
- 52-week range $1.09–$3.40; today's close sits at 34% of that range, 44.7% below the 52-week high.
- SEC filings that day: 8-K.
Oct 13, 2026 — ALEC slides 10.1% to $1.87
- Closed at $1.87, -10.10% vs the prior close of $2.08. Day range $1.77–$2.08, opened at $2.07.
- Volume was 2.84M shares, 0.8x its 50-day average of 3.60M.
- Price is -10.0% vs its 50-day average ($2.08) and -7.1% vs its 200-day average ($2.01).
- 52-week range $1.09–$3.40; today's close sits at 34% of that range, 45.0% below the 52-week high.
Oct 12, 2026 — ALEC ends flat (+0.0%) to $2.08
- Closed at $2.08, +0.00% vs the prior close of $2.08. Day range $2.02–$2.14, opened at $2.08.
- Volume was 1.63M shares, 0.5x its 50-day average of 3.58M — lighter than usual.
- Price is +0.4% vs its 50-day average ($2.07) and +3.5% vs its 200-day average ($2.01).
- 52-week range $1.09–$3.40; today's close sits at 43% of that range, 38.8% below the 52-week high.
Oct 9, 2026 — ALEC rises 3.0% to $2.08, 3 up days in a row
- Closed at $2.08, +2.97% vs the prior close of $2.02. Day range $2.00–$2.14, opened at $2.01.
- Volume was 3.12M shares, 0.9x its 50-day average of 3.52M.
- Price is +1.0% vs its 50-day average ($2.06) and +3.7% vs its 200-day average ($2.01).
- 52-week range $1.09–$3.40; today's close sits at 43% of that range, 38.8% below the 52-week high.
- That makes 3 straight gains.
Oct 8, 2026 — ALEC jumps 5.2% to $2.02 on 1.9x normal volume
- Closed at $2.02, +5.21% vs the prior close of $1.92. Day range $1.88–$2.06, opened at $1.90.
- Volume was 6.45M shares, 1.9x its 50-day average of 3.40M — unusually heavy trading.
- Price is -1.5% vs its 50-day average ($2.05) and +0.8% vs its 200-day average ($2.00).
- 52-week range $1.09–$3.40; today's close sits at 40% of that range, 40.6% below the 52-week high.
Oct 7, 2026 — ALEC jumps 6.1% to $1.92
- Closed at $1.92, +6.08% vs the prior close of $1.81. Day range $1.73–$1.92, opened at $1.78.
- Volume was 3.96M shares, 1.2x its 50-day average of 3.33M.
- Price is -5.9% vs its 50-day average ($2.04) and -4.0% vs its 200-day average ($2.00).
- 52-week range $1.09–$3.40; today's close sits at 36% of that range, 43.5% below the 52-week high.
Oct 6, 2026 — ALEC slides 9.0% to $1.81 on 3.3x normal volume
- Closed at $1.81, -9.05% vs the prior close of $1.99. Day range $1.75–$2.23, opened at $2.08.
- Volume was 10.18M shares, 3.3x its 50-day average of 3.13M — unusually heavy trading.
- Price is -11.0% vs its 50-day average ($2.03) and -9.4% vs its 200-day average ($2.00).
- 52-week range $1.09–$3.40; today's close sits at 31% of that range, 46.8% below the 52-week high.
Oct 5, 2026 — ALEC jumps 9.9% to $1.99 on 67.4x normal volume
- Closed at $1.99, +9.94% vs the prior close of $1.81. Day range $1.96–$2.73, opened at $2.72.
- Volume was 89.98M shares, 67.4x its 50-day average of 1.34M — unusually heavy trading.
- Price is -1.8% vs its 50-day average ($2.03) and -0.3% vs its 200-day average ($2.00).
- 52-week range $1.09–$3.40; today's close sits at 39% of that range, 41.5% below the 52-week high.
- SEC filings that day: 8-K.
- This was a results day: the company filed an earnings release (8-K Item 2.02).
Oct 2, 2026 — ALEC dips 2.7% to $1.81, a 1-month low
- Closed at $1.81, -2.69% vs the prior close of $1.86. Day range $1.80–$1.97, opened at $1.89.
- Volume was 1.17M shares, 0.9x its 50-day average of 1.32M.
- Price is -10.3% vs its 50-day average ($2.02) and -9.1% vs its 200-day average ($1.99).
- 52-week range $1.09–$3.40; today's close sits at 31% of that range, 46.8% below the 52-week high.
ALEC latest news & SEC filings
Every SEC filing by or about ALEC in the last 120 days, explained in plain English. Updated daily, with a same-day refresh for new filings.
Oct 16, 2026 · Form 424B5 — Prospectus supplement
Prospectus supplement — the company is selling securities off a shelf registration
An offering document: new shares or debt may be sold, which can increase the share count (dilution) or debt load. Size and terms are in the prospectus.
Oct 16, 2026 · Form 8-K — Major event / current report
Current report — a filing companies must make within 4 business days of a major event
- Item 1.01 — Signed a material agreement.
- Item 8.01 — Reported other events the company considers important.
Oct 16, 2026 · Form FWP — Free writing prospectus (offering marketing material)
Free writing prospectus (offering marketing material)
An offering document: new shares or debt may be sold, which can increase the share count (dilution) or debt load. Size and terms are in the prospectus.
Oct 15, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Rosenthal Arnon received an award of 217,500 shares on Oct 14, 2026; now holds 2,512,100
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Oct 15, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Wong-Sarad Grace received an award of 55,555 shares on Oct 14, 2026; now holds 161,570
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Oct 15, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Berkley Neil Lindsay received an award of 44,567 shares on Oct 14, 2026; now holds 395,216
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Oct 14, 2026 · Form 8-K — Major event / current report
Current report — a filing companies must make within 4 business days of a major event
- Item 5.02 — Change in directors or officers (appointment, departure or pay).
Oct 5, 2026 · Form 8-K — Major event / current report
Current report — a filing companies must make within 4 business days of a major event
- Item 1.01 — Signed a material agreement.
- Item 2.02 — Reported results of operations (earnings release).
- Item 7.01 — Released information under Regulation FD (e.g. a presentation or press release).
- Item 8.01 — Reported other events the company considers important.
This is a results-day filing: the earnings press release is attached as an exhibit.
Sep 18, 2026 · Form SCHEDULE 13G — Passive stake (13G)
Passive stake (13G) — an investor reported owning more than 5%
Filed by an outside investor (not the company). It reports a holding of more than 5% of a share class; percentage and holder name are in the filing.
Sep 4, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Wong-Sarad Grace sold 3,625 shares at $2.51 (≈$9.10K) on Sep 4, 2026
- Wong-Sarad Grace sold 3,625 shares at $2.51 (≈$9.10K) on Sep 4, 2026
- Wong-Sarad Grace sold 3,625 shares at $2.51 (≈$9.10K) on Sep 4, 2026
- Wong-Sarad Grace sold 3,625 shares at $2.51 (≈$9.10K) on Sep 4, 2026
- Wong-Sarad Grace sold 5,165 shares at $2.67 (≈$13.79K) on Sep 3, 2026
- Wong-Sarad Grace sold 5,165 shares at $2.67 (≈$13.79K) on Sep 3, 2026
- …plus 6 more transaction lines in the filing.
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Sep 4, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Berkley Neil Lindsay sold 29,251 shares at $2.66 (≈$77.81K) on Sep 3, 2026
- Berkley Neil Lindsay sold 29,251 shares at $2.66 (≈$77.81K) on Sep 3, 2026
- Berkley Neil Lindsay sold 29,251 shares at $2.66 (≈$77.81K) on Sep 3, 2026
- Berkley Neil Lindsay sold 29,251 shares at $2.66 (≈$77.81K) on Sep 3, 2026
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Sep 4, 2026 · Form 4 — Insider trade
Insider trade report (Form 4) — a director, officer or 10%+ owner changed their holdings
- Rosenthal Arnon sold 72,606 shares at $2.66 (≈$193.13K) on Sep 3, 2026
- Rosenthal Arnon sold 72,606 shares at $2.66 (≈$193.13K) on Sep 3, 2026
- Rosenthal Arnon sold 72,606 shares at $2.66 (≈$193.13K) on Sep 3, 2026
- Rosenthal Arnon sold 72,606 shares at $2.66 (≈$193.13K) on Sep 3, 2026
Open-market purchases (P) and sales (S) are shown in colour; awards, exercises and tax withholding are routine pay-related moves. Many sales are pre-planned under 10b5-1 plans.
Aug 6, 2026 · Form 10-Q — Quarterly report
Quarterly report (unaudited financial statements for the quarter)
Quarter ended Jun 30, 2026:
- Revenue: $3.32M (prior year $7.87M) (-57.8% vs Jun 30, 2025)
- Net income: -$22.99M (prior year -$30.52M) (loss narrowed vs Jun 30, 2025)
- Diluted EPS: -$0.21 (prior year -$0.30) (loss narrowed vs Jun 30, 2025)
Aug 6, 2026 · Form 8-K — Major event / current report
Current report — a filing companies must make within 4 business days of a major event
- Item 2.02 — Reported results of operations (earnings release).
This is a results-day filing: the earnings press release is attached as an exhibit.
Jul 8, 2026 · Form 8-K — Major event / current report
Current report — a filing companies must make within 4 business days of a major event
- Item 1.02 — Ended a material agreement.
Things to know before you trade ALEC
- Last results release: Oct 5, 2026 (8-K Item 2.02). Previous ones: Aug 6, 2026, May 7, 2026, Feb 25, 2026. Based on that rhythm, the next report is likely around Jan 4, 2027 — an estimate, not a confirmed date.
- How much it moves: over the last 20 sessions the average daily move was 3.49% (largest 10.1%). That is a volatile stock.
- Liquidity: about 6.90M shares (≈$12.70M) trade per day on average.
- 52-week position: $1.84 vs a range of $1.09–$3.40 (32% of the range).
- Dividends: no cash dividends in the last 2 years.
- Splits: none in the last 2 years.
- Insider trades (Form 4, last 12 months, recent 25 shown): 0 open-market buys, 25 sales; latest: Grace Wong-Sarad sold 3,625 shares on Sep 4, 2026.
- Latest filings: 8-K Oct 16, 2026; 8-K Oct 14, 2026; 8-K Oct 5, 2026.
- Share count: 111.66M shares outstanding (Jul 31, 2026), +10.3% vs a year earlier — notable dilution.
- Listing: Nasdaq · industry: Biological Products, (No Diagnostic Substances).
ALEC market data (last 20 sessions)
| Date | Open | High | Low | Close | Volume |
|---|---|---|---|---|---|
| Oct 16, 2026 | 2.18 | 2.18 | 1.79 | 1.84 | 5.15M |
| Oct 15, 2026 | 1.92 | 1.95 | 1.85 | 1.91 | 1.63M |
| Oct 14, 2026 | 1.84 | 1.92 | 1.82 | 1.88 | 2.91M |
| Oct 13, 2026 | 2.07 | 2.08 | 1.77 | 1.87 | 2.84M |
| Oct 12, 2026 | 2.08 | 2.14 | 2.02 | 2.08 | 1.63M |
| Oct 9, 2026 | 2.01 | 2.14 | 2.00 | 2.08 | 3.12M |
| Oct 8, 2026 | 1.90 | 2.06 | 1.88 | 2.02 | 6.45M |
| Oct 7, 2026 | 1.78 | 1.92 | 1.73 | 1.92 | 3.96M |
| Oct 6, 2026 | 2.08 | 2.23 | 1.75 | 1.81 | 10.18M |
| Oct 5, 2026 | 2.72 | 2.73 | 1.96 | 1.99 | 89.98M |
| Oct 2, 2026 | 1.89 | 1.97 | 1.80 | 1.81 | 1.17M |
| Oct 1, 2026 | 1.82 | 1.91 | 1.80 | 1.86 | 774.60K |
| Sep 30, 2026 | 1.88 | 1.95 | 1.83 | 1.85 | 792.70K |
| Sep 29, 2026 | 1.95 | 1.95 | 1.86 | 1.87 | 960.70K |
| Sep 28, 2026 | 1.92 | 1.96 | 1.86 | 1.92 | 713.30K |
| Sep 25, 2026 | 1.92 | 2.05 | 1.90 | 1.95 | 1.02M |
| Sep 24, 2026 | 2.02 | 2.05 | 1.90 | 1.92 | 849.30K |
| Sep 23, 2026 | 2.00 | 2.02 | 1.95 | 2.02 | 1.18M |
| Sep 22, 2026 | 1.97 | 2.04 | 1.93 | 2.01 | 1.46M |
| Sep 21, 2026 | 1.90 | 1.95 | 1.85 | 1.93 | 1.28M |
About Alector
Alector (ALEC) is listed on the Nasdaq and classified by the SEC under “Biological Products, (No Diagnostic Substances)”. Its business address is in SOUTH SAN FRANCISCO, CA. Fiscal year ends December 31. SEC CIK 1653087.
ALEC board of directors & executives
From SEC Form 3/4/5 insider filings made in the last 12 months (date = latest filing).
Directors
| Name | Role | Latest filing |
|---|---|---|
| Mark Altmeyer | Director | Jun 17, 2026 |
| Errol B Desouza | Director | Jun 17, 2026 |
| Elizabeth A. Garofalo | Director | Jun 17, 2026 |
| Paula Hammond | Director | Jun 17, 2026 |
| Louis J Jr Lavigne | Director | Jun 17, 2026 |
| Arnon Rosenthal | Chief Executive Officer | Sep 4, 2026 |
| Richard H Scheller | Director | Jun 17, 2026 |
| Kristine Yaffe | Director | Jun 17, 2026 |
Executive officers
| Name | Title | Latest filing |
|---|---|---|
| Neil Lindsay Berkley | CFO & Chief Business Officer | Sep 4, 2026 |
| Sara Kenkare-Mitra | President and Head of R&D | Dec 3, 2025 |
| Arnon Rosenthal | Chief Executive Officer | Sep 4, 2026 |
| Grace Wong-Sarad | Principal Accounting Officer | Sep 4, 2026 |
Recent insider buys & sales
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Sep 4, 2026 | Grace Wong-Sarad | Sale | 3,625 | $2.51 |
| Sep 4, 2026 | Grace Wong-Sarad | Sale | 3,625 | $2.51 |
| Sep 4, 2026 | Grace Wong-Sarad | Sale | 3,625 | $2.51 |
| Sep 4, 2026 | Grace Wong-Sarad | Sale | 3,625 | $2.51 |
| Sep 3, 2026 | Arnon Rosenthal | Sale | 72,606 | $2.66 |
| Sep 3, 2026 | Arnon Rosenthal | Sale | 72,606 | $2.66 |
| Sep 3, 2026 | Arnon Rosenthal | Sale | 72,606 | $2.66 |
| Sep 3, 2026 | Arnon Rosenthal | Sale | 72,606 | $2.66 |
| Sep 3, 2026 | Neil Lindsay Berkley | Sale | 29,251 | $2.66 |
| Sep 3, 2026 | Neil Lindsay Berkley | Sale | 29,251 | $2.66 |
| Sep 3, 2026 | Neil Lindsay Berkley | Sale | 29,251 | $2.66 |
| Sep 3, 2026 | Neil Lindsay Berkley | Sale | 29,251 | $2.66 |
| Sep 3, 2026 | Grace Wong-Sarad | Sale | 5,165 | $2.67 |
| Sep 3, 2026 | Grace Wong-Sarad | Sale | 5,165 | $2.67 |
| Sep 3, 2026 | Grace Wong-Sarad | Sale | 5,165 | $2.67 |
ALEC financials (annual, from XBRL filings)
| Fiscal year end | Revenue | Net income | Diluted EPS | Operating cash flow |
|---|---|---|---|---|
| Dec 31, 2025 | $21.05M | $-142.93M | -1.39 | $-184.03M |
| Dec 31, 2024 | $100.56M | $-119.05M | -1.23 | $-229.91M |
| Dec 31, 2023 | $97.06M | $-130.39M | -1.56 | $-184.16M |
| Dec 31, 2022 | $133.62M | $-133.31M | -1.62 | $-20.33M |
| Dec 31, 2021 | $207.09M | $-36.33M | -0.45 | $298.55M |
Latest balance sheet: total assets $202.85M, total liabilities $212.82M, cash $59.91M (as of Jun 30, 2026).
ALEC earnings / results-day log
| Date | Filing | Close that day |
|---|---|---|
| Oct 5, 2026 | 8-K Item 2.02 (results) | $1.99 |
| Aug 6, 2026 | 8-K Item 2.02 (results) | $1.83 |
| May 7, 2026 | 8-K Item 2.02 (results) | $2.44 |
| Feb 25, 2026 | 8-K Item 2.02 (results) | $2.39 |
| Nov 6, 2025 | 8-K Item 2.02 (results) | $1.30 |
| Oct 21, 2025 | 8-K Item 2.02 (results) | $3.21 |
| Aug 7, 2025 | 8-K Item 2.02 (results) | $1.46 |
| May 8, 2025 | 8-K Item 2.02 (results) | $1.04 |
| Feb 26, 2025 | 8-K Item 2.02 (results) | $1.72 |
| Nov 6, 2024 | 8-K Item 2.02 (results) | $5.24 |
| Aug 7, 2024 | 8-K Item 2.02 (results) | — |
| May 8, 2024 | 8-K Item 2.02 (results) | — |
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Information only, not investment advice. BuyMeWhiskey is not a registered investment adviser or broker-dealer; nothing here is a recommendation to buy, sell or hold any security, and there are no price targets. Data comes from SEC EDGAR filings and public end-of-day market data and may be delayed or contain errors. Verify with the company's filings before making decisions. Prices: end-of-day data as of Oct 16, 2026, 4:00 PM ET. Filings: SEC EDGAR. Updated after every US trading day.