TSX · ASTL · stock
Algoma Steel Group Inc. (ASTL) stock price history
Every TSX trading session of Algoma Steel Group Inc. from Oct 20, 2021 to Sep 28, 2026: 1,240 daily bars, adjusted for splits and dividends, with minute bars from Sep 17, 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.
ASTL adjusted close, 2021 to 2026
- CA$16.31
- All time high, 2024
- CA$8.16
- 52 week high, CA$4.20 low
- 1,240
- Daily sessions since 2021
Last updated Sep 28, 2026, the last stored session. Refreshes after each trading day. Full 2021 to 2026 series and minute bars.
ASTL key facts
- Algoma Steel Group Inc. (ASTL) closed at CA$6.16 on Sep 28, 2026 on TSX.
- ASTL's all time high close is CA$16.31, set on Nov 7, 2024; its all time low close is CA$4.47 on Oct 2, 2025.
- ASTL's 52 week range is CA$4.20 to CA$8.16.
- ASTL returned +11.8% over the year to Sep 28, 2026.
- Since Oct 20, 2021 ASTL returned -53%, -14.3% a year compounded.
- ASTL's deepest drawdown was -72.6% from Nov 7, 2024 to Oct 2, 2025.
- DataCedar holds 1,240 daily sessions of ASTL history from Oct 20, 2021 and minute bars from Sep 17, 2026, adjusted for splits and dividends, served by the API under a key.
ASTL price chart, 2021 to 2026
ASTL returns
Price return from the last close on or before the window start to Sep 28, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | +5.7% |
| 3 months | +3.7% |
| 6 months | +12.2% |
| Year to date | +10.8% |
| 1 year | +11.8% |
| 3 years | -31.6% |
| 5 years | n/a |
| 10 years | n/a |
| Since Oct 20, 2021 | -53.4% |
| Compound annual growth, 4.9 years | -14.3% |
ASTL records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- CA$16.31 on Nov 7, 2024
- All time low close
- CA$4.47 on Oct 2, 2025
- 52 week high
- CA$8.16 on Jun 1, 2026
- 52 week low
- CA$4.20 on Oct 2, 2025
- Deepest drawdown
- -72.6% from Nov 7, 2024 to Oct 2, 2025, not yet recovered
- Best single session
- +18.6% on Jun 15, 2022
- Worst single session
- -15.1% on Feb 12, 2026
- Volatility, 1 year annualised
- 72.5%
- Sessions closing higher, 1 year
- 48%
- Best calendar year
- 2023, +60%
- Worst calendar year
- 2025, -59%
ASTL 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. 2021 starts on Oct 20, 2021; 2026 runs to Sep 28, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | CA$5.68 | CA$8.16 | CA$4.62 | CA$6.16 | +9.0% | 115.1M | 186 |
| 2025 | CA$13.92 | CA$13.99 | CA$4.20 | CA$5.65 | -59.2% | 118.1M | 251 |
| 2024 | CA$12.60 | CA$16.49 | CA$8.86 | CA$13.86 | +8.3% | 15.3M | 252 |
| 2023 | CA$8.05 | CA$13.02 | CA$7.29 | CA$12.79 | +59.8% | 28.8M | 250 |
| 2022 | CA$12.46 | CA$14.43 | CA$7.21 | CA$8.01 | -35.5% | 45.5M | 250 |
| 2021 | CA$13.94 | CA$15.79 | CA$10.34 | CA$12.41 | n/a | 3.2M | 51 |
ASTL monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| September 2026 | CA$6.16 | +5.5% |
| August 2026 | CA$5.84 | +8.3% |
| July 2026 | CA$5.39 | -6.7% |
| June 2026 | CA$5.78 | -25.7% |
| May 2026 | CA$7.78 | +22.1% |
| April 2026 | CA$6.37 | +11.0% |
| March 2026 | CA$5.74 | -8.2% |
| February 2026 | CA$6.25 | +9.6% |
| January 2026 | CA$5.70 | +0.9% |
| December 2025 | CA$5.65 | -4.2% |
| November 2025 | CA$5.90 | +0.7% |
| October 2025 | CA$5.86 | +18.6% |
About the ASTL data
Daily bars. 1,240 sessions from Oct 20, 2021 to Sep 28, 2026, one row per TSX 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 Sep 17, 2026 forward, most recent session Sep 28, 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 TSX trading days; minute timestamps are UTC. Prices are in CAD. 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 Oct 20, 2021, 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/ASTL/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on TSX
Common questions
ASTL share price history
