TWSE · 3149 · stock

G-TECH Optoelectronics Corporation (3149) stock price history

Every TWSE trading session of G-TECH Optoelectronics Corporation from Dec 31, 2007 to Sep 24, 2026: 4,592 daily bars, adjusted for splits and dividends, with minute bars from Sep 15, 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.

Get 3149 data, free keyYear by year table

3149 adjusted close, 2007 to 2026

3149G-TECH Optoelectronics Corporation
NT$63.30+48.2% over one year
2010201520202025
NT$250.87
All time high, 2012
NT$109.00
52 week high, NT$32.20 low
4,592
Daily sessions since 2007

Last updated Sep 24, 2026, the last stored session. Refreshes after each trading day. Full 2007 to 2026 series and minute bars.

3149 key facts

  • G-TECH Optoelectronics Corporation (3149) closed at NT$63.30 on Sep 24, 2026 on TWSE.
  • 3149's all time high close is NT$250.87, set on Mar 29, 2012; its all time low close is NT$6.86 on Mar 19, 2020.
  • 3149's 52 week range is NT$32.20 to NT$109.00.
  • 3149 returned +48.2% over the year to Sep 24, 2026 and +19.3% over five years.
  • Over ten years 3149 returned +122%, +8.3% a year compounded.
  • 3149's deepest drawdown was -97.3% from Mar 29, 2012 to Mar 19, 2020.
  • DataCedar holds 4,592 daily sessions of 3149 history from Dec 31, 2007 and minute bars from Sep 15, 2026, adjusted for splits and dividends, served by the API under a key.

3149 price chart, 2007 to 2026

3149 adjusted close, Dec 31, 2007 to Sep 24, 2026NT$7.91NT$24.23NT$74.28NT$227.662010201520202025
Adjusted daily close, log scale. 260 sampled points across the full history; the API serves every session.

3149 returns

Price return from the last close on or before the window start to Sep 24, 2026, on adjusted closes.

PeriodReturn
1 month-1.2%
3 months-37.9%
6 months+47.7%
Year to date+83.2%
1 year+48.2%
3 years+167.9%
5 years+19.3%
10 years+122.0%
Since Dec 31, 2007-31.0%
Compound annual growth, 18.7 years-2.0%

3149 records

Measured on the stored closes; every figure is reproducible from the API series.

All time high close
NT$250.87 on Mar 29, 2012
All time low close
NT$6.86 on Mar 19, 2020
52 week high
NT$109.00 on Jun 26, 2026
52 week low
NT$32.20 on Dec 29, 2025
Deepest drawdown
-97.3% from Mar 29, 2012 to Mar 19, 2020, not yet recovered
Best single session
+520.3% on Nov 23, 2011
Worst single session
-26.1% on Sep 18, 2008
Volatility, 1 year annualised
64.7%
Sessions closing higher, 1 year
48%
Best calendar year
2011, +557%
Worst calendar year
2008, -79%

3149 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. 2007 starts on Dec 31, 2007; 2026 runs to Sep 24, 2026.

YearOpenHighLowCloseReturnVolumeSessions
2026NT$36.45NT$109.00NT$36.20NT$63.30+79.8%2.2B178
2025NT$33.55NT$46.80NT$24.00NT$35.20+5.9%1.2B242
2024NT$24.30NT$47.50NT$20.30NT$33.25+36.6%1.7B242
2023NT$28.68NT$31.63NT$16.45NT$24.35-15.3%135.2M239
2022NT$47.98NT$53.35NT$24.25NT$28.75-39.8%174.9M246
2021NT$41.15NT$83.52NT$36.85NT$47.75+15.8%714.5M243
2020NT$14.19NT$41.76NT$6.85NT$41.22+187.8%315.2M245
2019NT$13.57NT$22.88NT$12.76NT$14.33+6.0%136.9M241
2018NT$29.63NT$30.71NT$12.64NT$13.51-54.4%69.8M245
2017NT$31.48NT$44.22NT$23.57NT$29.63-5.9%212.6M243
2016NT$30.09NT$39.08NT$18.78NT$31.48+4.6%121.8M244
2015NT$71.10NT$76.20NT$20.92NT$30.09-57.7%133.4M246
2014NT$91.12NT$108.11NT$52.90NT$71.10-22.0%204.2M248
2013NT$182.85NT$183.09NT$69.16NT$91.12-49.7%295.9M244
2012NT$148.88NT$254.38NT$148.88NT$181.18+21.7%404.1M248
2011NT$22.65NT$153.80NT$22.65NT$148.88+557.3%31.3M247
2010NT$22.65NT$22.65NT$22.65NT$22.650.0%0250
2009NT$18.90NT$22.72NT$15.00NT$22.65+19.8%379.3K249
2008NT$92.09NT$107.44NT$17.55NT$18.90-79.4%7.6M251
2007NT$92.80NT$93.52NT$90.66NT$91.73n/a113.2K1

3149 monthly closes, last 12 months

MonthMonth end closeChange
September 2026NT$63.30-1.2%
August 2026NT$64.10-2.7%
July 2026NT$65.90-35.1%
June 2026NT$101.50+42.6%
May 2026NT$71.20+50.5%
April 2026NT$47.30+8.6%
March 2026NT$43.55-17.2%
February 2026NT$52.60+0.4%
January 2026NT$52.40+48.9%
December 2025NT$35.20+1.4%
November 2025NT$34.70-5.2%
October 2025NT$36.60-11.9%

About the 3149 data

Daily bars. 4,592 sessions from Dec 31, 2007 to Sep 24, 2026, one row per TWSE 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 15, 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 TWSE trading days; minute timestamps are UTC. Prices are in TWD. 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 Dec 31, 2007, 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/3149/bars?timeframe=1Day&adjustment=all&limit=50000" \
  -H "X-API-Key: YOUR_KEY"

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