Even though both are called a 'corporate division,' a muljeok bunhal (physical division) hands 100% of the carved-out company to the parent and gives existing shareholders not a single share, whereas an injeok bunhal (spin-off division) distributes new shares of the new company to shareholders in proportion to their holdings. Whether subsidiary stock lands in your account is the first fork between the two.
In Korea, from 2010 to 2021 there were 376 physical divisions and 82 spin-off divisions — even though commercial law treats the spin-off as the rule, physical division was used more than four times as often in practice. Which route is taken changes the shares you receive, the ex-rights reference price, and the rights you can invoke if you object.
What actually stays in a shareholder's hands
A physical division carves out a business unit into a subsidiary and lets the parent hold 100% of it. Shareholders still own only the parent, never the subsidiary directly. When a prized battery or chip unit moves into a subsidiary, shareholders end up owning that business only indirectly, one layer down.
A spin-off division splits the company horizontally into a surviving company and a new company, and existing shareholders receive new shares of each by the split ratio. If you held 100 shares, you still hold 100 shares' worth across the two companies afterward. That is why conversions into a holding-company structure are done through spin-off divisions. The fork looks like this.
| Item | Physical division | Spin-off division |
|---|---|---|
| Subsidiary shares to holders | Parent holds 100% (holders get 0) | Allotted by split ratio |
| Post-division stake | Only the parent stake remains | Surviving + new combined |
| Change in share count | None (no ex-rights) | Adjusted via allotment/ex-rights |
| Status in commercial law | Exception | Rule |
| Main purpose | Unit spin-off / subsidiary IPO | Holding-company conversion |
A physical division pushes your stake one layer down; a spin-off division splits it sideways on the same layer — the fork is whether new shares reach your account.
How many new shares do you get in a spin-off — split ratio and ex-rights
The number of new shares in a spin-off is set by the split ratio, the proportion in which the pre-division net assets are divided between the surviving and new companies. The price is not left unchanged either — it is adjusted through ex-rights, since one company splits into two and the old price is shared between them. The mechanism is the same as when an ex-dividend adjustment lowers the reference price.
Assume you hold 100 shares priced at 10,000 won, the net-asset split ratio is surviving:new = 7:3, and new-company shares are allotted 1:1. The key point is that a shareholder's total valuation is the same before and after.
| Item | Surviving co. | New co. | Total |
|---|---|---|---|
| Shares held | 100 | 100 | — |
| Ex-rights / listing reference price | 7,000 won | 3,000 won | — |
| Valuation | 700,000 won | 300,000 won | 1,000,000 won |
The pre-division valuation of 100 x 10,000 = 1,000,000 won equals the sum of the two post-division valuations exactly. Real allotment ratios and reference prices vary with each firm's net assets and share count, and fractional shares are settled in cash, but the skeleton holds: a shareholder's total is preserved in theory. A physical division, by contrast, issues no new shares, so the share count is unchanged and there is no ex-rights step — only the parent gets re-valued as the prized unit moves out.
Why physical division drew shareholder anger — appraisal rights and split listings
LG Energy Solution, carved out of LG Chem, and Kakao Pay, split from Kakao, became the emblematic 'split listing' cases. When a growth unit that the parent's shareholders once owned is separated into a subsidiary and separately listed through its own IPO, holders left with only parent stock felt the growth business had been diluted away.
To address this, a December 2022 amendment to the Capital Markets Act enforcement decree granted appraisal (stock-purchase) rights to shareholders who object to a physical division. Once a listed company's board resolves on a physical division, dissenting shareholders can demand the company buy back their shares; the price is set by agreement, or the market price if none is reached. On top of that, a proposal to give parent-company shareholders priority subscription to the subsidiary's IPO shares was debated. Spin-off divisions already carried such appraisal rights; for physical divisions, this was the point at which that defense was added.
What to watch
- In the disclosure, first check whether it is a physical or spin-off division, and the split ratio
- For a physical division, see whether the subsidiary's listing plan and expected timing are disclosed
- Track the exercise window, expected buyback price, and any cap on appraisal-right claims
- For a spin-off, confirm the ex-rights reference price and the trading-halt / re-listing schedule
- If the goal is a holding-company conversion, watch for a following in-kind contribution or tender offer