---
title: "New Stock Listing | SENIOR MATERIAL rose over 30% in early trading, HJ SCIENCE-B dropped 25%"
type: "News"
locale: "en"
url: "https://longbridge.com/en/news/290497017.md"
description: "SENIOR MATERIAL and HJ SCIENCE's new stock performance on the first day of listing showed divergence. SENIOR MATERIAL opened up 38.4% and is currently up 37.5%; HJ SCIENCE plummeted over 20% after opening and is currently down 25%. SENIOR MATERIAL raised a net amount of HKD 1.281 billion, with an oversubscription of 1562 times; HJ SCIENCE raised a net amount of approximately HKD 1.019 billion, with an oversubscription of 2006 times"
datetime: "2026-06-23T01:45:41.000Z"
locales:
  - [zh-CN](https://longbridge.com/zh-CN/news/290497017.md)
  - [en](https://longbridge.com/en/news/290497017.md)
  - [zh-HK](https://longbridge.com/zh-HK/news/290497017.md)
---

# New Stock Listing | SENIOR MATERIAL rose over 30% in early trading, HJ SCIENCE-B dropped 25%

Two new stocks debuted today, with varying performances in the early session.

Lithium-ion battery separator manufacturer SENIOR MATERIAL ( 06067) opened at HKD 12.43, up 38.4% from the offering price of HKD 8.98, currently trading at HKD 12.35, up 37.5%.

Biotechnology company HJ SCIENCE ( 06132) opened flat at HKD 81.8 but quickly dropped over 20%, currently trading at HKD 61.35, down 25%.

SENIOR MATERIAL raised a net amount of HKD 1.281 billion. The public offering was oversubscribed by 1,562 times, with a minimum lot size of 500 shares and a winning rate of 0.1%.

HJ SCIENCE raised a net amount of approximately HKD 1.019 billion. The public offering was oversubscribed by 2,006 times, with a minimum lot size of 100 shares and a winning rate of 2%

### Related Stocks

- [06067.HK](https://longbridge.com/en/quote/06067.HK.md)
- [06132.HK](https://longbridge.com/en/quote/06132.HK.md)

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