Zhongji Innolight (300308, SZSE) is a China company in the Optical Modules & Devices segment of the AI compute value chain — the world's leading maker of 800G optical transceivers for AI clusters. As of October 04, 2026, its market cap is $141.8 billion ($141.8B), ranking #30 of 244 companies overall and #1 of 23 in the Optical Modules & Devices segment (23.3% of the segment, 0.56% of the chain). Over the past year the stock gained 97.2% (52-week range 345.10 – 1,382.33 CNY).
| Company | Zhongji Innolight（中际旭创） |
|---|---|
| Ticker | 300308 · SZSE |
| Segment | Optical Modules & Devices |
| Headquarters | China |
| Market cap | $141.8B（$141.8 billion） |
| Close | 808.44 CNY (October 04, 2026) |
| Today | -0.56% |
| 30 days | -18.18% |
| 1 year | +97.17% |
| 52-wk high / low | 1,382.33 / 345.10 CNY |
| Share of segment | 23.3% (Optical Modules & Devices: 23 companies) |
| Share of chain | 0.56% (244 companies combined) |
| Segment leader | Zhongji Innolight ($141.8B) |
| Net income (TTM) | $3.0 billion |
|---|---|
| P/E ratio (TTM) | 46.6 |
| P/B ratio | 23.89 |
| Basis | PE/PB 腾讯行情；净利润=总市值÷PE 推算（TTM） (source: tencent, 2026-10-05 08:05) |
| # | Company | Market | Market cap |
|---|---|---|---|
| 1 | Zhongji Innolight 300308 | SZ | $141.8B |
| 2 | Lumentum Holdings LITE | US | $97.4B |
| 3 | Eoptolink Technology 300502 | SZ | $80.8B |
| 4 | Coherent Corp COHR | US | $66.0B |
| 5 | T&S Communications 300394 | SZ | $42.4B |
| 6 | Yuanjie Semiconductor 688498 | SH | $29.9B |
| 7 | Accelink Technologies 002281 | SZ | $20.3B |
| 8 | Fabrinet FN | US | $16.6B |
| 9 | HGTech 000988 | SZ | $13.8B |
| 10 | Cambridge Technology 603083 | SH | $11.3B |