How to Buy Zhongji Innolight (3308.HK) from Hong Kong
Zhongji Innolight - the Chinese AI optical-transceiver maker already listed in Shenzhen as 300308.SZ - completed one of 2026's largest Hong Kong IPOs on 2026-07-30, raising roughly HK$53.4bn. The public offer has closed, so the only way in now is buying on the open market. This guide covers the real first-week numbers, the board-lot cost math, and broker options for HK and AU-based investors.
| Milestone | Date | Price (HK$) | vs IPO price |
|---|---|---|---|
| Final offer price (set ahead of listing) | by 2026-07-30 | HK$980 | - |
| Day 1 close (approx.) | 2026-07-30 | HK$1,006 | +2.7% |
| Snapshot (2026-08-04) | 2026-08-04 | HK$1,177 | +20.1% |
This is a historical snapshot, not a live quote - the price will have moved. Check your broker app for the current price before trading. investing.com
What happened at the IPO (for readers arriving after the fact)
Zhongji Innolight priced its Hong Kong offering at HK$980 - about 3% below the top of its indicative range. The deal still raised roughly HK$53.4bn, making it one of the largest Hong Kong listings of 2026, with a large cornerstone investor base anchoring the book before the public tranche even opened.
If you subscribed and were allotted shares, they were credited to your broker account around the listing date under the standard HKEX settlement timetable and are already tradeable. If you missed the window - which is most readers finding this page now that it has closed - the calculator below covers buying on the open market instead.
Board-lot cost calculator
One board lot = 50 shares. This uses the same government fee schedule (stamp duty, SFC/FRC levy, HKEX trading fee, CCASS fee) as our stamp duty calculator.
Broker options for HK and AU-based investors
| Broker | Commission | Platform fee | Notes |
|---|---|---|---|
| Futu moomoo | 0.03% (min HK$3) | HK$15 | Platform fee per order; frequent zero-commission promos for new HK stock accounts |
| Tiger Brokers | 0.03% (min HK$3) | HK$15 | Similar structure to Futu; check current promo tier |
| Longbridge | 0% (min HK$0) | HK$15 | Advertises zero commission on HK stocks; platform fee still applies |
| Interactive Brokers | 0.08% (min HK$18) | HK$0 | IBKR HK tiered pricing; no separate platform fee, min HK$18/order |
Illustrative published rates, not live - confirm the current schedule in-app, especially promotional zero-commission periods.
A single stock that has moved roughly 20% in its first week carries real short-term volatility on top of normal single-company risk (customer concentration, AI-capex cycle timing, competition from other optical-transceiver makers). Position-size according to your own risk tolerance, and treat every price figure on this page as a historical snapshot rather than a current quote.
Frequently Asked Questions
Can I still subscribe to the Zhongji Innolight IPO?
No. The public offer closed and shares began trading on HKEX under ticker 3308 on 2026-07-30. If you missed subscription, the only way in now is buying on the open market through a broker, which this guide covers.
How much does one board lot of 3308.HK cost?
One board lot is 50 shares. At the HK$980 IPO price that is HK$49,000 before fees; at the current price it will be different - use the calculator above with today's quote to get an exact figure, since the stock has moved significantly since listing.
How did 3308.HK perform in its first week of trading?
Shares priced at HK$980, closed the first day around HK$1,006, and by 2026-08-04 had reached roughly HK$1,177 - about 20% above the IPO price. This is a snapshot from one point in time, not a forecast; check a live quote before trading, since a stock that has already moved 20% in days carries real short-term volatility.
Which broker is cheapest for buying 3308.HK from Hong Kong or Australia?
It depends on trade size and current promotions. Futu moomoo, Tiger Brokers and Longbridge frequently run zero- or low-commission promos for HK stocks but charge a platform fee per order; IBKR has no platform fee but a higher minimum commission and is popular with AU-based investors for its multi-currency account. Compare the exact numbers for your lot size in the calculator above - promotional rates change often, so treat this as a starting point, not a locked-in price.
What does Zhongji Innolight actually make?
Zhongji Innolight (Shenzhen-listed as 300308.SZ, now dual-listed in Hong Kong as 3308.HK) makes optical transceivers - the components that move data between servers inside AI data centers at very high speed. Demand has been driven by the AI infrastructure buildout at hyperscale cloud providers. It is already listed and trading in Shenzhen; the HK listing is a secondary listing that opens the stock to international and HK/AU retail investors who cannot easily access the A-share market.