IO Biotech, Inc. (IOBT) Stock Price History
Historical prices from 2021 to 2026
- 1M
- —
- 3M
- -94.0%
- YTD
- -98.2%
- 1Y
- -99.2%
- 3Y
- -81.1%
- 5Y
- -76.1%
Loading 10-year price history...
IOBT Historical Performance
IOBT Annual Returns
Year-by-year price performance · 2021–2026
- 2021 annual price return
- -59.1%
- 2022 annual price return
- -67.7%
- 2023 annual price return
- -22.0%
- 2024 annual price return
- -51.8%
- 2025 annual price return
- -34.2%
- 2026 annual price return
- -48.0%
IOBT Stock Price Trajectory (2021–2026)
As of June 29, 2026, IO Biotech, Inc. (IOBT) trades at $0.01, representing a -99.2% return over the past year. The stock has delivered a -99.9% total return over five years (-76.1% CAGR), reflecting challenging market conditions.
The stock reached its all-time high of $17.88 on November 5, 2021. From this peak, IOBT has corrected -99.9%, currently trading 99% below its 200-day moving average, suggesting potential weakness.
When compared to Healthcare sector peers IMVT (+137.0% 1Y), NKTX (+63.6% 1Y), and AGEN (-38.3% 1Y), IOBT has underperformed the peer group average. Compare IOBT vs IMVT →
IOBT Historical Price Data · from 2021
Rows 1–50 of 1,109| Date | Open | High | Low | Close | Volume | Change % |
|---|---|---|---|---|---|---|
| 2026-04-09 | 0.02 | 0.02 | 0.01 | 0.01 | 3.06M | -27.65% |
| 2026-04-08 | 0.01 | 0.02 | 0.01 | 0.02 | 14.76M | -65.31% |
| 2026-04-06 | 0.03 | 0.06 | 0.03 | 0.05 | 187.99M | +51.70% |
| 2026-04-02 | 0.03 | 0.04 | 0.03 | 0.03 | 28.94M | -23.46% |
| 2026-04-01 | 0.05 | 0.05 | 0.03 | 0.04 | 23.20M | -28.11% |
| 2026-03-31 | 0.05 | 0.06 | 0.04 | 0.06 | 59.68M | -66.46% |
| 2026-03-30 | 0.20 | 0.20 | 0.17 | 0.17 | 1.07M | -9.33% |
| 2026-03-27 | 0.20 | 0.20 | 0.19 | 0.19 | 658K | -5.85% |
| 2026-03-26 | 0.20 | 0.21 | 0.19 | 0.20 | 1.01M | +6.33% |
| 2026-03-25 | 0.19 | 0.21 | 0.19 | 0.19 | 649K | +0.94% |
| 2026-03-24 | 0.20 | 0.21 | 0.19 | 0.19 | 997K | -12.63% |
| 2026-03-23 | 0.18 | 0.22 | 0.18 | 0.22 | 1.71M | +23.78% |
| 2026-03-20 | 0.19 | 0.19 | 0.18 | 0.18 | 977K | -7.05% |
| 2026-03-19 | 0.18 | 0.20 | 0.17 | 0.19 | 1.17M | +3.60% |
| 2026-03-18 | 0.18 | 0.18 | 0.16 | 0.18 | 1.43M | +8.52% |
| 2026-03-17 | 0.17 | 0.19 | 0.16 | 0.17 | 2.41M | -1.17% |
| 2026-03-16 | 0.19 | 0.20 | 0.14 | 0.17 | 5.50M | -10.70% |
| 2026-03-13 | 0.24 | 0.24 | 0.19 | 0.19 | 3.20M | -13.66% |
| 2026-03-12 | 0.24 | 0.25 | 0.22 | 0.22 | 2.99M | -11.28% |
| 2026-03-11 | 0.27 | 0.29 | 0.25 | 0.25 | 3.15M | -3.14% |
| 2026-03-10 | 0.29 | 0.31 | 0.26 | 0.26 | 1.89M | -7.82% |
| 2026-03-09 | 0.32 | 0.33 | 0.28 | 0.28 | 2.14M | -6.82% |
| 2026-03-06 | 0.31 | 0.33 | 0.30 | 0.30 | 713K | -9.98% |
| 2026-03-05 | 0.32 | 0.34 | 0.32 | 0.33 | 293K | +0.60% |
| 2026-03-04 | 0.34 | 0.35 | 0.32 | 0.33 | 261K | -2.30% |
| 2026-03-03 | 0.31 | 0.35 | 0.31 | 0.34 | 653K | +3.10% |
| 2026-03-02 | 0.33 | 0.33 | 0.31 | 0.33 | 843K | -5.62% |
| 2026-02-27 | 0.36 | 0.36 | 0.34 | 0.35 | 478K | -2.79% |
| 2026-02-26 | 0.34 | 0.36 | 0.34 | 0.36 | 412K | +5.16% |
| 2026-02-25 | 0.34 | 0.36 | 0.34 | 0.34 | 594K | +2.52% |
| 2026-02-24 | 0.33 | 0.34 | 0.33 | 0.33 | 290K | -1.45% |
| 2026-02-23 | 0.34 | 0.35 | 0.32 | 0.34 | 657K | -0.62% |
| 2026-02-20 | 0.35 | 0.37 | 0.34 | 0.34 | 0 | -5.69% |
| 2026-02-19 | 0.37 | 0.38 | 0.35 | 0.36 | 960K | -5.13% |
| 2026-02-18 | 0.36 | 0.39 | 0.35 | 0.38 | 870K | +9.95% |
| 2026-02-17 | 0.37 | 0.39 | 0.34 | 0.35 | 597K | -6.59% |
| 2026-02-13 | 0.37 | 0.37 | 0.34 | 0.37 | 1.47M | +3.93% |
| 2026-02-12 | 0.35 | 0.36 | 0.32 | 0.36 | 1.01M | 0.00% |
| 2026-02-11 | 0.37 | 0.38 | 0.34 | 0.36 | 2.68M | -3.00% |
| 2026-02-10 | 0.37 | 0.40 | 0.34 | 0.37 | 2.63M | -1.61% |
| 2026-02-09 | 0.36 | 0.40 | 0.34 | 0.37 | 2.72M | +6.57% |
| 2026-02-06 | 0.31 | 0.35 | 0.30 | 0.35 | 6.34M | +9.38% |
| 2026-02-05 | 0.28 | 0.33 | 0.27 | 0.32 | 4.35M | +18.08% |
| 2026-02-04 | 0.28 | 0.29 | 0.26 | 0.27 | 740K | -1.81% |
| 2026-02-03 | 0.28 | 0.28 | 0.26 | 0.28 | 1.85M | -0.72% |
| 2026-02-02 | 0.29 | 0.30 | 0.27 | 0.28 | 1.69M | -4.14% |
| 2026-01-30 | 0.32 | 0.33 | 0.29 | 0.29 | 1.66M | -8.23% |
| 2026-01-29 | 0.31 | 0.33 | 0.30 | 0.32 | 1.31M | +1.94% |
| 2026-01-28 | 0.32 | 0.34 | 0.31 | 0.31 | 1.22M | -5.78% |
| 2026-01-27 | 0.32 | 0.34 | 0.30 | 0.33 | 2.75M | +6.13% |
Intrinsic Valuation
DCF models, multiple analysis, and analyst estimates.
Historical Returns
10-year return with dividends reinvested.
DCA Calculator
See how regular investing compounds over time.
Peer Comparison
Compare growth, multiples, and margins vs sector.
IOBT — Frequently Asked Questions
Quick answers to the most common questions about buying IOBT stock.
How has IOBT stock performed recently?
IOBT declined -99.2% over the past year, below its 5-year annualized CAGR of -76.1%. The stock trades below its 200-day moving average, reflecting the downtrend.
What is IOBT's all-time high price?
IO Biotech, Inc. reached $17.88 on 2021-11-05. The 52-week high is $2.79. Current 1-year return of -99.2% places the stock further from historical peaks.
Where can I download IOBT historical price data?
This page provides IOBT daily OHLCV data with 50-day MA, 200-day MA, and RSI indicators. Data spans 2021-2026, downloadable in CSV format.