Company profile · Semiconductors
GCS Holdings
環宇通訊半導體控股股份有限公司 · 4991
What it does
Drafted and translated from cited sources, with links to the passages they are based on for your verification. Care is taken to translate its original meaning from Mandarin as closely as possible.
GCS Holdings provides wafer foundry services for advanced RF and optoelectronic compound semiconductors, alongside AOC-brand optoelectronic products.[1]
The company engages in the research, development, production, and sales of RF devices, power electronics devices, and optoelectronic devices wafer foundry in the United States.[1]
Monthly revenue
| Latest month | Revenue | Year on year | Month on month |
|---|---|---|---|
| 2026-10 | NT$313m | +24.6% | -27.9% |
2024-11 to 2026-10, monthly revenue.
Foreign investors
| Last 20 trading days | Net |
|---|---|
| 2026-10-12 to 2026-11-10 | −NT$250m |
Net buying (green) and selling (red) by foreign investors, NT$ at each day's close. All companies.
Facts
| Full English name | GCS Holdings, Inc. |
|---|---|
| Chinese name | 環宇通訊半導體控股股份有限公司 |
| Stock code | 4991 (TPEx) |
| Industry | Semiconductors |
| Founded | 30 Nov 2010 |
| Listed | 15 Sep 2014 |
| Paid-in capital | NT$1.2bn |
| Chairman | 黃大倫 |
| President | 安寶信( 總執行長暨總裁) |
| Headquarters | 23155 Kashiwa Court Torrance, California, USA |
| Website | http://gcsincorp.com |
| Official business description | 砷化鎵/磷化銦/氮化鎵及碳化矽高階射頻及光電元件化合物晶圓代工 · 自有品牌光電元件產品之研究、開發、製造及銷售業務 · 相關智慧財產權授權 |
Facts from MOPS company basic information, retrieved 03 Nov 2026. The official business description is the company's own entry and can be out of date.
Sources
- Annual report 2025 (English), business scope · annual_report · retrieved 04 Nov 2026
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