Quantum-Si - 6 Year Stock Price History | QSI
Historical daily share price chart and data for Quantum-Si since 2020 adjusted for splits and dividends. The latest closing stock price for Quantum-Si as of September 15, 2026 is 0.72.
- The all-time high Quantum-Si stock closing price was 22.41 on February 18, 2021.
- The Quantum-Si 52-week high stock price is 3.10, which is 330.6% above the current share price.
- The Quantum-Si 52-week low stock price is 0.69, which is 4.2% below the current share price.
- The average Quantum-Si stock price for the last 52 weeks is 1.13.
| Quantum-Si Historical Annual Stock Price Data | ||||||
|---|---|---|---|---|---|---|
| Year | Average Stock Price | Year Open | Year High | Year Low | Year Close | Annual % Change |
| 2026 | 0.9350 | 1.1600 | 1.3100 | 0.7020 | 0.7200 | -34.55% |
| 2025 | 1.6132 | 4.2600 | 4.2900 | 1.0000 | 1.1000 | -59.26% |
| 2024 | 1.3679 | 2.0300 | 3.6000 | 0.6330 | 2.7000 | 34.33% |
| 2023 | 1.8685 | 1.8400 | 3.8900 | 1.1450 | 2.0100 | 9.84% |
| 2022 | 3.6115 | 8.2200 | 8.2200 | 1.8200 | 1.8300 | -76.75% |
| 2021 | 9.9520 | 10.4900 | 22.4100 | 5.6500 | 7.8700 | -22.46% |
| Sector | Industry | Market Cap | Revenue |
|---|---|---|---|
| Computer and Technology | Semiconductors | $0.158B | $0.002B |
| Quantum-Si Incorporated is a company pioneering next-generation semiconductor chip-based proteomics. Quantum-Si Incorporated, formerly known as HighCape Capital Acquisition Corp., is based in NEW YORK. | |||
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|---|---|---|---|
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| SK Hynix - (SKHY) | South Korea | $1277.120B | 0.00 |
| Lam Research (LRCX) | United States | $338.945B | 46.54 |
| Applied Materials (AMAT) | United States | $334.239B | 38.60 |
| ARM Holdings (ARM) | United Kingdom | $258.293B | 262.86 |
| QUALCOMM (QCOM) | United States | $197.234B | 21.24 |
| Marvell Technology (MRVL) | United States | $194.409B | 89.04 |
| ASE Technology Holding (ASX) | Taiwan | $82.974B | 43.16 |
| Infineon Technologies AG (IFNNY) | Germany | $81.658B | 35.81 |
| United Microelectronics (UMC) | Taiwan | $54.406B | 20.20 |
| Credo Technology (CRDO) | Cayman Islands | $28.266B | 50.81 |
| Qnity Electronics (Q) | United States | $23.973B | 27.95 |
| GlobalFoundries (GFS) | United States | $23.457B | 30.11 |
| Tower Semiconductor (TSEM) | Israel | $21.941B | 77.12 |
| Entegris (ENTG) | United States | $19.770B | 40.39 |
| Lattice Semiconductor (LSCC) | United States | $14.590B | 183.60 |
| Amkor Technology (AMKR) | United States | $11.523B | 20.80 |
| Rohm (ROHCY) | Japan | $11.131B | 48.87 |
| Nova (NVMI) | Israel | $10.650B | 39.51 |
| Rambus (RMBS) | United States | $9.014B | 37.10 |
| Applied Optoelectronics (AAOI) | United States | $8.059B | 0.00 |
| FormFactor (FORM) | United States | $7.927B | 56.49 |
| Allegro MicroSystems (ALGM) | United States | $6.200B | 77.35 |
| Cirrus Logic (CRUS) | United States | $6.125B | 14.76 |
| Impinj (PI) | United States | $5.328B | 544.97 |
| Soitec SA (SLOIF) | France | $5.049B | 0.00 |
| Greif (GEF.B) | United States | $4.879B | 26.89 |
| Diodes (DIOD) | United States | $4.157B | 49.06 |
| Synaptics (SYNA) | United States | $3.806B | 77.24 |
| AXT Inc (AXTI) | United States | $3.784B | 2885.00 |
| Ambarella (AMBA) | United States | $2.840B | 0.00 |
| Navitas Semiconductor (NVTS) | United States | $2.822B | 0.00 |
| Himax Technologies (HIMX) | Taiwan | $2.306B | 64.18 |
| NLight (LASR) | United States | $2.188B | 0.00 |
| Ams-OSRAM AG (AMSSY) | Austria | $1.965B | 0.00 |
| Ichor Holdings (ICHR) | United States | $1.914B | 567.67 |
| Ambiq Micro (AMBQ) | United States | $1.472B | 0.00 |
| POET Technologies (POET) | Canada | $1.107B | 0.00 |
| Alpha And Omega Semiconductor (AOSL) | United States | $0.749B | 0.00 |
| Indie Semiconductor (INDI) | United States | $0.714B | 0.00 |
| IQE (IQEPF) | United Kingdom | $0.523B | 0.00 |
| NVE (NVEC) | United States | $0.473B | 26.27 |
| SEALSQ (LAES) | Switzerland | $0.444B | 0.00 |
| Aeluma (ALMU) | United States | $0.240B | 0.00 |
| Silvaco (SVCO) | United States | $0.214B | 0.00 |
| QuickLogic (QUIK) | United States | $0.187B | 0.00 |
| GCT Semiconductor Holding (GCTS) | United States | $0.177B | 0.00 |
| Valens Semiconductor (VLN) | Israel | $0.172B | 0.00 |
| Atomera (ATOM) | United States | $0.150B | 0.00 |
| Coda Octopus Group (CODA) | United States | $0.121B | 24.32 |
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| Rubicon Technology (RBCN) | United States | $0.063B | 0.00 |
| Nano Labs (NA) | China | $0.053B | 0.00 |
| Sequans Communications S.A (SQNS) | France | $0.044B | 0.00 |
| SemiLEDS (LEDS) | Taiwan | $0.018B | 0.00 |
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| Semilux (SELX) | Taiwan | $0.016B | 0.00 |
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