According to Tongbi Finance, on May 28, Optics Tech (300489) appeared on the leaderboard. Reason for being listed: this stock was among the top 5 securities with a daily increase of 15%. The buying amount on the leaderboard was 654 million yuan, the selling amount was 533 million yuan, and the net buying amount was 121 million yuan.

The top 5 buying amounts totaled 585 million yuan. Among them, the first buying position was for Shenzhen Stock Connect, with a purchase of 227 million yuan; the second buying position was for institutional use, with a purchase of 127 million yuan; the third buying position was Huatai Securities Co., Ltd. Shanghai Branch, with a purchase of 100 million yuan; the fourth buying position was Kaineng Securities Co., Ltd. Xi'an Taihua Road Securities Business Department, with a purchase of 79.8954 million yuan; the fifth buying position was Everbright Securities Co., Ltd. Shantou Huashan Road Securities Business Department, with a purchase of 50.9102 million yuan.

The top 5 selling amounts totaled 530 million yuan. Among them, the first selling position was for Shenzhen Stock Connect, with a sale of 225 million yuan; the second selling position was for institutional use, with a sale of 155 million yuan; the third selling position was for institutional use, with a sale of 53.288 million yuan; the fourth selling position was for institutional use, with a sale of 51.3204 million yuan; the fifth selling position was Huatai Securities Co., Ltd. Beijing West Third Ring International Finance Center Securities Business Department, with a sale of 45.9317 million yuan.

As of the close on May 28, Optics Tech (300489) hit the daily limit, with a closing price of 140.02 yuan, a circulating market value of 19.414 billion yuan, and a turnover rate of 11.01%.

Tongbi Finance Tips:

Optics Tech (300489.SZ) is projected to have an operating income of 2.08 billion yuan in 2025, with a growth rate of 42.96%. The net profit attributable to the parent company is -33 million yuan, with a growth rate of -370.86%, and the return on net assets is -5.11%.

In the first quarter of 2026, the company's operating income was 568 million yuan, with a growth rate of 20.49%. The net profit attributable to the parent company was 15 million yuan, with a growth rate of 60.81%.

Currently, the company belongs to the materials industry, with main product types being aluminum processing materials, specialized equipment, and components. The 2025 report shows the main composition as infrared optics and laser materials: 89.01%; aluminum alloy materials and components: 10.99%.