SET · PROS · stock
Prosper Engineering Public Company Limited (PROS) stock price history
Every SET trading session of Prosper Engineering Public Company Limited from Apr 27, 2021 to Sep 28, 2026: 1,321 daily bars, adjusted for splits and dividends, with minute bars from Sep 17, 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.
PROS adjusted close, 2021 to 2026
- THB 3.52
- All time high, 2021
- THB 0.6100
- 52 week high, THB 0.1400 low
- 1,321
- Daily sessions since 2021
Last updated Sep 28, 2026, the last stored session. Refreshes after each trading day. Full 2021 to 2026 series and minute bars.
PROS key facts
- Prosper Engineering Public Company Limited (PROS) closed at THB 0.1600 on Sep 28, 2026 on SET.
- PROS's all time high close is THB 3.52, set on May 20, 2021; its all time low close is THB 0.1500 on May 18, 2026.
- PROS's 52 week range is THB 0.1400 to THB 0.6100.
- PROS returned -73.3% over the year to Sep 28, 2026 and -94.9% over five years.
- Since Apr 27, 2021 PROS returned -95%, -42.7% a year compounded.
- PROS's deepest drawdown was -95.7% from May 20, 2021 to May 18, 2026.
- DataCedar holds 1,321 daily sessions of PROS history from Apr 27, 2021 and minute bars from Sep 17, 2026, adjusted for splits and dividends, served by the API under a key.
PROS price chart, 2021 to 2026
PROS returns
Price return from the last close on or before the window start to Sep 28, 2026, on adjusted closes.
| Period | Return |
|---|---|
| 1 month | -5.9% |
| 3 months | -11.1% |
| 6 months | -42.9% |
| Year to date | -62.8% |
| 1 year | -73.3% |
| 3 years | -86.6% |
| 5 years | -94.9% |
| 10 years | n/a |
| Since Apr 27, 2021 | -95.1% |
| Compound annual growth, 5.4 years | -42.7% |
PROS records
Measured on the stored closes; every figure is reproducible from the API series.
- All time high close
- THB 3.52 on May 20, 2021
- All time low close
- THB 0.1500 on May 18, 2026
- 52 week high
- THB 0.6100 on Sep 29, 2025
- 52 week low
- THB 0.1400 on May 19, 2026
- Deepest drawdown
- -95.7% from May 20, 2021 to May 18, 2026, not yet recovered
- Best single session
- +32.4% on Dec 4, 2025
- Worst single session
- -24.7% on Aug 15, 2023
- Volatility, 1 year annualised
- 92.9%
- Sessions closing higher, 1 year
- 27%
- Best calendar year
- 2024, +35%
- Worst calendar year
- 2023, -61%
PROS 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. 2021 starts on Apr 27, 2021; 2026 runs to Sep 28, 2026.
| Year | Open | High | Low | Close | Return | Volume | Sessions |
|---|---|---|---|---|---|---|---|
| 2026 | THB 0.4400 | THB 0.5100 | THB 0.1400 | THB 0.1600 | -62.8% | 246.4M | 186 |
| 2025 | THB 0.9900 | THB 1.25 | THB 0.3200 | THB 0.4300 | -57.0% | 800.6M | 242 |
| 2024 | THB 0.7400 | THB 2.06 | THB 0.7300 | THB 1.00 | +35.1% | 372.5M | 243 |
| 2023 | THB 1.91 | THB 2.14 | THB 0.5200 | THB 0.7400 | -61.1% | 63.5M | 243 |
| 2022 | THB 3.02 | THB 3.02 | THB 1.80 | THB 1.90 | -36.3% | 320.6M | 241 |
| 2021 | THB 3.91 | THB 4.88 | THB 2.68 | THB 2.98 | n/a | 2.1B | 166 |
PROS monthly closes, last 12 months
| Month | Month end close | Change |
|---|---|---|
| September 2026 | THB 0.1600 | -5.9% |
| August 2026 | THB 0.1700 | -5.6% |
| July 2026 | THB 0.1800 | +5.9% |
| June 2026 | THB 0.1700 | -19.0% |
| May 2026 | THB 0.2100 | -16.0% |
| April 2026 | THB 0.2500 | -16.7% |
| March 2026 | THB 0.3000 | -26.8% |
| February 2026 | THB 0.4100 | -4.7% |
| January 2026 | THB 0.4300 | 0.0% |
| December 2025 | THB 0.4300 | +22.9% |
| November 2025 | THB 0.3500 | -12.5% |
| October 2025 | THB 0.4000 | -31.0% |
About the PROS data
Daily bars. 1,321 sessions from Apr 27, 2021 to Sep 28, 2026, one row per SET 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 Sep 17, 2026 forward, most recent session Sep 29, 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 SET trading days; minute timestamps are UTC. Prices are in THB. 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 Apr 27, 2021, 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/PROS/bars?timeframe=1Day&adjustment=all&limit=50000" \
-H "X-API-Key: YOUR_KEY"Nearby on SET
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Common questions
PROS share price history
