Aptose Biosciences Inc.
APTONASDAQHealthcare
$1.71
+$1.71(+100.00%)
Market Cap$4364655
P/E Ratio—
52W High$43.191
52W Low$1.1
Aptose Biosciences Inc. (APTO) Stock Price History
Key milestones, OHLCV table, annual returns, peers & What If.
apto · EOD price history · split-adj. · FMP · as of Feb 10, 2026
5-Year High5Y
$1,280.25
Jun 10, 2021
-99.9% from here
5-Year Low5Y
$1.10
Apr 2, 2025
+55.5% from low
IPO Priceadj.
—
Mar 16, 1992
+0.0% since IPO
1 Year Ago
—
—
+0.0% in 1Y
5 Years Ago
$1,203.75
Jun 9, 2021
-99.9% in 5Y
10 Years Ago
$693.00
Jun 9, 2016
-99.8% in 10Y
Historical Price Data · APTO
| Date↓ | Open↕ | High↕ | Low↕ | Close↕ | Close (Unadj.) ⓘ | Volume↕ | Change %↕ |
|---|---|---|---|---|---|---|---|
| Feb 10, 2026 | $1.71 | $1.71 | $1.71 | $1.71 | $1.71 | 648K | +0.00% |
| Jan 30, 2026 | $1.71 | $1.71 | $1.71 | $1.71 | $1.71 | 648K | +0.00% |
| Nov 25, 2025 | $1.71 | $1.71 | $1.71 | $1.71 | $1.71 | 648K | +0.00% |
| Apr 28, 2025 | $2.30 | $2.30 | $2.20 | $2.20 | $2.20 | 2K | -4.35% |
| Apr 25, 2025 | $2.23 | $2.23 | $2.20 | $2.20 | $2.20 | 1K | -1.35% |
| Apr 24, 2025 | $2.31 | $2.31 | $1.81 | $2.12 | $2.12 | 50K | -8.23% |
| Apr 23, 2025 | $2.47 | $2.47 | $2.31 | $2.31 | $2.31 | 1K | -6.48% |
| Apr 22, 2025 | $2.46 | $2.47 | $2.31 | $2.31 | $2.31 | 5K | -6.10% |
| Apr 21, 2025 | $2.50 | $2.50 | $2.11 | $2.16 | $2.16 | 3K | -13.60% |
| Apr 17, 2025 | $1.52 | $1.97 | $1.52 | $1.97 | $1.97 | 2K | +29.61% |
| Apr 16, 2025 | $2.07 | $2.08 | $1.87 | $2.02 | $2.02 | 7K | -2.42% |
| Apr 15, 2025 | $2.00 | $2.11 | $2.00 | $2.11 | $2.11 | 1K | +5.50% |
| Apr 14, 2025 | $2.05 | $2.30 | $2.05 | $2.17 | $2.17 | 6K | +5.85% |
| Apr 11, 2025 | $2.07 | $2.13 | $2.07 | $2.08 | $2.08 | 2K | +0.48% |
| Apr 10, 2025 | $2.25 | $2.25 | $2.07 | $2.13 | $2.13 | 11K | -5.33% |
| Apr 9, 2025 | $2.12 | $2.26 | $2.00 | $2.25 | $2.25 | 12K | +6.13% |
| Apr 8, 2025 | $2.77 | $2.77 | $2.24 | $2.48 | $2.48 | 3K | -10.47% |
| Apr 7, 2025 | $3.40 | $4.00 | $2.50 | $2.65 | $2.65 | 34K | -22.06% |
| Apr 4, 2025 | $2.50 | $3.40 | $2.50 | $3.00 | $3.00 | 23K | +20.00% |
| Apr 3, 2025 | $2.04 | $2.99 | $2.04 | $2.60 | $2.60 | 47K | +27.45% |
Showing 1–20 of 978 records
Annual Stock Price Performance · APTO
Jan 1 → Dec 31 · 6 years2026+0.0%$1.71 → $1.71
+0.0%
2025-75.3%$6.93 → $1.71
-75.3%
2024-91.1%$75.90 → $6.76
-91.1%
2023-42.6%$132.75 → $76.20
-42.6%
2022-58.6%$315.00 → $130.50
-58.6%
2021-75.3%$1228.50 → $303.75
-75.3%
Best Year2026 · +0.0%
Worst Year2024 · -91.1%
Positive Years1 / 6
Avg Annual Return-57.1%
6Y Total Return-99.9%
6Y CAGR~-66.6% / yr
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If you invested $1,000 in APTO 10 years ago — how much would it be worth today?
INVESTED$1,000
→TODAY WORTH$2
Total Return-99.8%
CAGR~-45.1% / yr
Profit$-998
Based on Jun 9, 2016 · $693.00Split & dividend adjustedNo fees assumed
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About Price History & OHLCV Data
Aptose Biosciences Inc. (APTO) is classified under Healthcare and trades on NASDAQ. The quote snapshot on this page shows a last price of $1.71. Use the chart and OHLCV table below for open, high, low, close and volume over time.
Annual performance bars, similar companies in the same sector, and the What If calculator help you explore long-horizon returns without leaving this tab. Figures use split-adjusted end-of-day prices where noted; this content is informational, not investment advice.
Data: FMP EOD · split-adjusted where noted · not investment advice
Frequently Asked Questions
APTO price history · 5 questionsEnd-of-day prices are sourced from market data providers (Financial Modeling Prep). Corporate actions such as splits may be reflected in adjusted series; always verify critical values with your broker or official filings.
APTO historical stock pricesFMP EOD datasplit-adjusted OHLCV