Tongtech Photonics Turns Profitable in June, Optical Filters Target 5G and Data Centers

Tongtech Photonics (6588-TW), a manufacturer of optical filters for fiber-optic communications, recently announced its self-compiled financial results for June 2025, following a stock price surge that triggered regulatory disclosure requirements. The company reported a post-tax net profit of NT$8 million, or NT$0.22 per share, reversing a loss from the same period last year (2025).

Tongtech's revenue for the first half of 2025 reached NT$183 million, representing a year-on-year increase of 132.45%. The company underwent management restructuring in 2025, bringing in specialized talent in AI, semiconductors, optoelectronics, and financial management. Through product portfolio optimization, cost control, and improved operational efficiency, the company's performance has shown continuous improvement.

Tongtech's core products are thin-film optical filters used in active and passive optical components and cloud data centers. Monthly revenues in the first half of the year showed significant volume growth, maintaining high double-digit year-on-year growth, indicating that demand from 5G infrastructure and data centers is steadily translating into order momentum. The company's stock price opened higher today and rose steadily, hitting the daily limit of NT$89.1 on strong institutional buying. Foreign investors also shifted from net sellers to net buyers.

Analysts point out that Tongtech has been focusing on high-speed optical communications and AI data center applications in recent years, deepening its expertise in advanced optical coating technologies. Its products are already being used in 400G and 800G high-speed optical modules, PON (Passive Optical Network), and high-speed transmission architectures in data centers. The company continues to invest in the development of 800G/1.6T optical filters and advanced optical components, strengthening its position and competitiveness in the high-speed optical communications market.