Nasdaq · ARCI · stock
Archimedes Tech SPAC Partners III Co. (ARCI) stock price history
Every Nasdaq trading session of Archimedes Tech SPAC Partners III Co. from Mar 16, 2026 to Sep 25, 2026: 135 daily bars, adjusted for splits and dividends, with minute bars from Jul 13, 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.
ARCI adjusted close, 2026 to 2026
- $10.17
- All time high, 2026
- $10.20
- 52 week high, $9.83 low
- 135
- Daily sessions since 2026
Last updated Sep 25, 2026, the last stored session. Refreshes after each trading day. Full 2026 to 2026 series and minute bars.
ARCI key facts
- Archimedes Tech SPAC Partners III Co. (ARCI) closed at $10.10 on Sep 25, 2026 on Nasdaq.
- ARCI's all time high close is $10.17, set on Aug 10, 2026; its all time low close is $9.84 on Mar 30, 2026.
- ARCI's 52 week range is $9.83 to $10.20.
- ARCI's deepest drawdown was -0.7% from Aug 14, 2026 to Sep 4, 2026.
- DataCedar holds 135 daily sessions of ARCI history from Mar 16, 2026 and minute bars from Jul 13, 2026, adjusted for splits and dividends, served by the API under a key.
ARCI price chart, 2026 to 2026
ARCI returns
Price return from the last close on or before the window start to Sep 25, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | -0.4% |
| 3 months | +1.2% |
| 6 months | +2.1% |
| Year to date | n/a |
| 1 year | n/a |
| 3 years | n/a |
| 5 years | n/a |
| 10 years | n/a |
| Since Mar 16, 2026 | +2.5% |
ARCI records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- $10.17 on Aug 10, 2026
- All time low close
- $9.84 on Mar 30, 2026
- 52 week high
- $10.20 on Aug 11, 2026
- 52 week low
- $9.83 on Mar 30, 2026
- Deepest drawdown
- -0.7% from Aug 14, 2026 to Sep 4, 2026, not yet recovered
- Best single session
- +0.5% on Mar 17, 2026
- Worst single session
- -0.5% on Mar 20, 2026
- Volatility, 1 year annualised
- 2.2%
- Sessions closing higher, 1 year
- 28%
ARCI 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. 2026 starts on Mar 16, 2026; 2026 runs to Sep 25, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | $9.90 | $10.20 | $9.83 | $10.10 | n/a | 4.4M | 135 |
ARCI monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| September 2026 | $10.10 | -0.4% |
| August 2026 | $10.14 | 0.0% |
| July 2026 | $10.14 | +1.3% |
| June 2026 | $10.01 | +0.2% |
| May 2026 | $9.99 | +0.8% |
| April 2026 | $9.91 | +0.6% |
| March 2026 | $9.85 | n/a |
About the ARCI data
Daily bars. 135 sessions from Mar 16, 2026 to Sep 25, 2026, one row per Nasdaq 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 Jul 13, 2026 forward, most recent session Sep 24, 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 Nasdaq trading days; minute timestamps are UTC. Prices are in USD. 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 Mar 16, 2026, 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/ARCI/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on Nasdaq
Common questions
ARCI share price history
