The Only Confirmed Buyer in Hanmi's HBM Rally Is Its Own Chairman
Gwak Dong-shin has spent 70.2 billion won of his own money on Hanmi Semiconductor since 2023 to reach a 33.63 percent stake. The Micron demand behind the rally still has no name in any company filing.
Vincent Jiang · 3 min read
The chairman bought again today
On October 7, Hanmi Semiconductor disclosed that chairman Gwak Dong-shin had bought 2,549 more of its shares at 274,235 won each, about 700 million won, executing the purchase plan he filed on September 9 1. He paid above the day's 273,500 won opening price 14. Since 2023, Gwak has added 747,940 shares for 70.2 billion won, an average near 93,900 won, and now holds 33.63 percent of the company 1.
His cash is the only money with a filing behind it
Hanmi frames the buying as responsible management 1. Set the motive aside: in a trade built on rumored orders, the chairman is the only buyer whose money comes with a filing. The stock's market value stood at 25.8 trillion won on October 7 4. Its entire disclosed order book for 2026 is 86.2 billion won across four contracts, up 39.8 percent on the year 2, roughly a third of one percent of the value priced off it.
Four tranches, 16.7 billion won: the chairman kept buying all year
Data
| Value | |
|---|---|
| April | ₩3bn |
| June | ₩8bn |
| July | ₩5bn |
| October | ₩0.7bn |
The bonder demand has no name in the filings
The year's largest disclosed deal, signed October 6, is 24.48 billion won of substrate equipment for Samsung Electro-Mechanics, worth 4.24 percent of last year's sales 2. The thermocompression bonders that stack HBM memory, the product the rally is priced on, have no disclosed customer. Korean trade press names Micron as the buyer, citing Hanmi's invitations to Micron's Singapore and India plant ceremonies and its new Hanmi USA unit in San Jose 3. Hanmi's own contract filings this year name only Korean customers 2.
The receipts that do exist
Second-quarter revenue was 251 billion won, up 39.5 percent, at a 51.9 percent operating margin; the first quarter had been 50.9 billion won, a reminder that bonder revenue arrives in lumps, not trends 4. The demand side is real at Micron: fiscal 2026 revenue of 133.19 billion dollars, up 256 percent, net capex of 27.37 billion dollars, and about 25 billion dollars more planned for the first half of fiscal 2027 alone 56. Micron has already contracted the vast majority of its 2027 HBM output at higher prices 6.
Micron's capex nearly doubled to $30.7 billion last fiscal year
Data
| Micron capex | |
|---|---|
| FY2021 | $10.03B |
| FY2022 | $12.07B |
| FY2023 | $7.68B |
| FY2024 | $8.39B |
| FY2025 | $15.86B |
| FY2026 | $30.71B |
The shorts and the analysts are not persuaded
Net short interest runs 6.05 to 6.10 percent of the float 7, and seven analysts carry a mean HOLD with an average target of 271,429 won against the 278,000 won close on October 6 8. The stock is up 118 percent this year and still roughly a third below its 426,000 won high 48. The Korea Exchange's own research counsels caution in both directions: price drops often precede surges in short interest rather than follow them 7.
The chairman's average cost sits two-thirds below the October 6 close
Data
| Value | |
|---|---|
| Chairman's average cost | ₩93,900 |
| Mean analyst target | ₩271,429 |
| October 6 close | ₩278,000 |
| 2026 high | ₩426,000 |
What would make the rumor a receipt
Two disclosures settle it: a contract filing that names an overseas buyer for the bonders, or a third-quarter print showing the lump landed. Until one arrives, the only confirmed buyer in the HBM trade is the man running the company that issues the stock.
Deepdive
AI-generated from this story and its cited sources. Not investment advice.
