Nasdaq · ALEC · stock
Alector, Inc. (ALEC) stock price history
Every Nasdaq trading session of Alector, Inc. from Feb 7, 2019 to Sep 28, 2026: 1,920 daily bars, adjusted for splits and dividends, with minute bars from Jul 13, 2026 forward. The full series is served by the API: a free key covers the last year, paid plans the whole history and minute bars.
ALEC adjusted close, 2019 to 2026
- $39.49
- All time high, 2021
- $3.40
- 52 week high, $1.09 low
- 1,920
- Daily sessions since 2019
Last updated Sep 28, 2026, the last stored session. Refreshes after each trading day. Full 2019 to 2026 series and minute bars.
ALEC key facts
- Alector, Inc. (ALEC) closed at $1.92 on Sep 28, 2026 on Nasdaq.
- ALEC's all time high close is $39.49, set on Jul 7, 2021; its all time low close is $0.9040 on Apr 10, 2025.
- ALEC's 52 week range is $1.09 to $3.40.
- ALEC returned -38.1% over the year to Sep 28, 2026 and -91.8% over five years.
- Since Feb 7, 2019 ALEC returned -89%, -25.4% a year compounded.
- ALEC's deepest drawdown was -97.7% from Jul 7, 2021 to Apr 10, 2025.
- DataCedar holds 1,920 daily sessions of ALEC history from Feb 7, 2019 and minute bars from Jul 13, 2026, adjusted for splits and dividends, served by the API under a key.
ALEC price chart, 2019 to 2026
ALEC returns
Price return from the last close on or before the window start to Sep 28, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | -17.9% |
| 3 months | +3.2% |
| 6 months | -4.0% |
| Year to date | +26.3% |
| 1 year | -38.1% |
| 3 years | -71.3% |
| 5 years | -91.8% |
| 10 years | n/a |
| Since Feb 7, 2019 | -89.4% |
| Compound annual growth, 7.6 years | -25.4% |
ALEC records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- $39.49 on Jul 7, 2021
- All time low close
- $0.9040 on Apr 10, 2025
- 52 week high
- $3.40 on Oct 16, 2025
- 52 week low
- $1.09 on Dec 3, 2025
- Deepest drawdown
- -97.7% from Jul 7, 2021 to Apr 10, 2025, not yet recovered
- Best single session
- +57.1% on Jul 2, 2021
- Worst single session
- -49.8% on Oct 22, 2025
- Volatility, 1 year annualised
- 105.2%
- Sessions closing higher, 1 year
- 46%
- Best calendar year
- 2021, +36%
- Worst calendar year
- 2024, -76%
ALEC price history by year
Open is the first session's open, high and low span the year, close is the last session's close, and the return is close over the previous year's close. 2019 starts on Feb 7, 2019; 2026 runs to Sep 28, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | $1.57 | $2.76 | $1.37 | $1.92 | +23.1% | 173.3M | 185 |
| 2025 | $1.89 | $3.40 | $0.8700 | $1.56 | -17.5% | 339.4M | 250 |
| 2024 | $7.89 | $8.90 | $1.68 | $1.89 | -76.3% | 197.2M | 252 |
| 2023 | $9.31 | $9.86 | $3.66 | $7.98 | -13.5% | 150.7M | 250 |
| 2022 | $20.71 | $21.25 | $6.84 | $9.23 | -55.3% | 156.7M | 251 |
| 2021 | $15.23 | $43.32 | $14.66 | $20.65 | +36.5% | 213M | 252 |
| 2020 | $17.34 | $35.93 | $9.12 | $15.13 | -12.2% | 186.6M | 253 |
| 2019 | $18.70 | $27.00 | $13.64 | $17.23 | n/a | 72.5M | 227 |
ALEC monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| September 2026 | $1.92 | -15.0% |
| August 2026 | $2.26 | +49.7% |
| July 2026 | $1.51 | -24.9% |
| June 2026 | $2.01 | -6.9% |
| May 2026 | $2.16 | -8.9% |
| April 2026 | $2.37 | +10.2% |
| March 2026 | $2.15 | -11.5% |
| February 2026 | $2.43 | +28.6% |
| January 2026 | $1.89 | +21.2% |
| December 2025 | $1.56 | +17.3% |
| November 2025 | $1.33 | -9.5% |
| October 2025 | $1.47 | -50.3% |
About the ALEC data
Daily bars. 1,920 sessions from Feb 7, 2019 to Sep 28, 2026, one row per Nasdaq trading day with open, high, low, close and volume. Prices are adjusted for splits and cash dividends so the series is comparable across its whole length; the API also serves the raw, split only and dividend only views.
Minute bars. Stored from Jul 13, 2026 forward, most recent session Sep 25, 2026. Minute history is captured from the day collection began and is never backfilled, so this start date is exact. Five minute, fifteen minute and hourly bars are derived from these minutes.
Time and currency. Session dates are Nasdaq trading days; minute timestamps are UTC. Prices are in USD. Volume is shares traded on the session.
Get the data. The REST endpoint returns the daily series as JSON with pagination; a free key serves the last year, Quant and above the full history back to Feb 7, 2019, and minute bars come with the paid windows. It takes timeframe (1Min, 5Min, 15Min, 1Hour, 1Day), adjustment, start and end. See the bars endpoint and authentication, and pricing for the plan windows.
curl "https://api.datacedar.com/v3/stocks/ALEC/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on Nasdaq
Common questions
ALEC share price history
