QSI (Quantum-Si incorporated) historical data
STOCKListed1-minute bars
| Symbol | QSI |
|---|---|
| Name | Quantum-Si incorporated |
| Exchange | NASDAQ |
| Sector | Healthcare |
| Industry | Medical - Devices |
| IPO date | 2020-11-13 |
| History | 2020-11-16 to 2026-10-09 (about 6 years) |
| Bar sizes | Daily, hourly, 5-minute and 1-minute |
| Adjustments | Unadjusted, split-adjusted or split-and-dividend-adjusted, chosen on read |
| Survivorship | Included in the survivorship-free universe |
| Free tier | Last 12 months of daily bars |
Price history at a glance
QSI last closed at $1.53 on 2026-10-09, -12.1% over the past year and -81.6% over five years. Its deepest fall from a prior high in this history was -97.2%, reached on 2024-11-19.
| Last close | $1.53 (2026-10-09) |
|---|---|
| 1-year change | -12.1% |
| 5-year change | -81.6% |
| Annualized since 2020-11-16 | -27.2% |
| 52-week range | $0.70 – $2.63 |
| Deepest drawdown | -97.2% (2024-11-19) |
| Avg. daily dollar volume (3 months) | $5.2m |
| Daily bars in history | 1,469 |
Split- and dividend-adjusted closes. Computed by FinzData from its own daily bars.
Institutional ownership (13F, 2026Q2)
| Managers holding | 141 |
|---|---|
| Shares held | 52,890,858 ($46.8m reported value) |
| Quarter flows | 27 new, 36 added, 57 trimmed, 43 exited; -10,225,392 shares vs the prior quarter |
From SEC Form 13F filings. Every holder, line by line, and the full history since 2013: yf.Client().holders("QSI") on the look-back bundles. Top holders of QSI · All 13F managers
Short interest (2026-09-30)
| Shares short | 11,830,534 (-9.3% vs prior report) |
|---|---|
| Days to cover | 2.46 |
QSI short interest history · Healthcare sector
Get it in Python
import finzdata as yf
df = yf.Ticker("QSI").history(start="2020-11-16", interval="1d")
df.tail()