Information & Communication · 9449, 4784, 3769 · 2026-10-27
TOKYO — GMO Internet Group (TSE: 9449) is the corporate equivalent of a puppy mill. It has eleven listed subsidiaries, and the stakes it holds in them are worth 1.45x its own market cap. The number of listed subsidiaries, and the inherent conflicts of interest built into them, have drawn criticism for years. Strong financial results and the colorful character of its founder, Masatoshi Kumagai, let the group defy gravity. The breach at its listed subsidiary GMO Internet (4784) has broken that spell, and may make an unwind of the structure unavoidable.
All amounts in this note are converted from yen at ¥157.45 = US$1, the mid-market rate on October 26, 2026. Market caps are at the October 26 close. The company writes its English name as "GMO internet group, Inc." in its filings; this note capitalizes it as GMO Internet Group for readability.
| Company | Market cap | Held by parent |
|---|---|---|
| Masatoshi Kumagai | — | — |
| GMO Internet Group (9449) | US$1.97bn | 41.65% |
| GMO Payment Gateway (3769) | US$3.94bn | 40.70% |
| GMO Internet (4784) | US$808mn | 60.52% |
| GMO Financial Holdings (7177) | US$783mn | 65.90% |
| GMO Financial Gate (4051) | US$325mn | 57.00% |
| GMO GlobalSign (3788) | US$177mn | 52.00% |
| GMO Pepabo (3633) | US$79mn | 60.90% |
| GMO Commerce (410A) | US$45mn | 64.62% |
| GMO TECH HD (415A) | US$53mn | 51.20% |
| GMO Prime Strategy (5250) | US$47mn | 63.10% |
| GMO Media (6180) | US$42mn | 63.10% |
| GMO Product Platform (3695) | US$41mn | 66.35% |
Stakes are group totals. GMO Internet, Product Platform and Commerce are holding ratios from large shareholding reports filed in 2026; the others are voting rights from the annual securities report as of December 31, 2025. Kumagai's 41.7% is the holding ratio of his asset management company (33.27%) and his personal holding (8.38%) combined, from his June 2026 filing.
The parent holds nine of the eleven directly. Two sit one layer further down. GMO Financial Gate (4051) is 57.0% owned by GMO Payment Gateway (3769), and on October 1 the parent transferred its entire 64.62% stake in GMO Commerce (410A) to GMO Internet. The count is still rising: in December 2025 the parent made Prime Strategy (5250) a consolidated subsidiary.
| Item | US$ | Stake held |
|---|---|---|
| GMO Internet Group market cap | $1.97bn | — |
| Payment Gateway | $1.60bn | 40.7% |
| Financial Holdings | $516mn | 65.9% |
| GMO Internet | $489mn | 60.5% |
| GlobalSign | $92mn | 52.0% |
| Pepabo | $48mn | 60.9% |
| Prime Strategy | $30mn | 63.1% |
| TECH HD | $27mn | 51.2% |
| Product Platform | $27mn | 66.3% |
| Media | $27mn | 63.1% |
At market prices, the nine stakes the parent holds directly are worth $2.86bn. The parent itself has a market cap of $1.97bn. The market therefore puts a value of minus $0.89bn on everything else the parent owns and owes. The largest single piece is its 40.7% of GMO Payment Gateway, worth $1.61bn, or 82% of the parent's market cap on its own.
The gap is not new. At the October 20 close, before the breach was announced, the same stakes were worth 1.30x the parent. On Friday, October 23, after the announcement, the multiple was 1.33x. On Monday, October 26, after the ransom demands were reported over the weekend, it was 1.45x.
On October 20, GMO Internet found malicious programs installed on customer servers of Onamae.com Desktop Cloud, a virtual private server service used to run automated FX trading. Trading-account login details stored on those servers may have been taken and used. The company shut down every server from October 21 and put the number of servers possibly affected at 26,739. On October 23 the parent said it could not yet estimate the effect on consolidated results. Kumagai disclosed on his blog that the attackers had demanded $50mn in cryptocurrency by October 21; the company says it has paid nothing. NHK reported on October 26 that the hacker group was now demanding $1mn by noon Tokyo time on October 27, the day this note is published. What happens after that deadline is not known at the time of writing.
From the October 21 close to October 26, the parent's shares fell 20.6% and GMO Internet's 18.0%. The breached service is run by GMO Internet, 39.5% of which is owned by outside shareholders. Whatever the incident costs GMO Internet, they bear 39.5% of it, while the group is run from the parent. That is the structural conflict in one case.
Buy in the minorities. Taking all eleven subsidiaries private would cost $3.27bn at market prices before any premium, 1.66x the parent's market cap. GMO Payment Gateway alone accounts for $2.34bn of that.
Sell the stakes. The nine direct stakes are worth $2.86bn at market. Selling down the largest, GMO Payment Gateway, would by itself raise an amount close to 82% of the parent's market cap.
Either route removes the conflict. Leaving the structure as it is leaves the gap between the parent and its stakes in place, and activist investors are already watching it.
The market already valued the parent at less than what it holds, at 1.30x before the breach. By October 26 the multiple had widened to 1.45x, and the bill for the incident lands first on a listed subsidiary's minority shareholders. The structure can now be unwound by the group itself, through buy-ins or sales, or by someone else.
Prepared for client circulation · Source data: beluuga.ai