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1. What Metaplanet has done with its buyback
Metaplanet, the Tokyo-listed company that holds Bitcoin (BTC) as its main treasury asset, has been buying back its own shares since mid-October 2026. Its board approved a repurchase program on October 13 worth up to ¥60 billion, roughly $380 million, and the first large purchase followed on October 14. The company says the goal is to increase the amount of Bitcoin backing each share that remains outstanding.
The program is capped at ¥60 billion or 200 million shares, whichever limit is reached first, and it runs until October 2027. That gives management a full year to buy, which means the pace of repurchases can be adjusted to market conditions and to the availability of funding rather than being forced into a single window.
The company opened the program with a block trade of 73.98 million shares at ¥261 each, a total of about ¥19.31 billion. Block trades let a buyer take a large quantity of stock in one negotiated transaction instead of working through the order book, which limits the price impact of a purchase of that size. Purchases after the opening trade combined further block trades with ordinary open-market buying.
2. How does a buyback raise Bitcoin per share?
A buyback raises Bitcoin per share by shrinking the denominator. If a company holds a fixed amount of Bitcoin and retires part of its share count, each remaining share represents a larger slice of that holding. Bitcoin-treasury companies track this ratio closely because it is one of the few simple measures of whether management is creating value for existing shareholders rather than merely growing the balance sheet.
The logic only holds when the money used for the repurchase does not reduce the Bitcoin position by an equal or larger proportion. In Metaplanet's case the funding comes from debt rather than from selling coins, so the Bitcoin stock is left intact while the share count falls. That is the arithmetic the company is relying on, and it is why the financing structure matters as much as the buyback itself.
Buybacks also make the most sense when a stock trades at a discount to the value of the assets behind it. Metaplanet's shares have fallen a long way from their peak, and a company that believes its stock undervalues its Bitcoin can argue that retiring shares is a more efficient use of capital than buying more coins at market price.
Investors often compare this approach with issuing new shares to buy more Bitcoin, which grows the coin total but can reduce the Bitcoin held per share if the shares are sold below the value of the assets. A repurchase runs in the opposite direction. It does not add coins, but it concentrates the existing holding among fewer shares, and for a company whose stock has been under pressure that distinction is the heart of the strategy.
3. Where is the money coming from?
The money is coming largely from a convertible bond. Metaplanet priced ¥52 billion of zero-coupon convertible bonds due in 2031, a deal worth roughly $330 million to $340 million depending on the exchange rate used. Zero-coupon means the bonds pay no regular interest. Investors accept that in exchange for the right to convert their bonds into shares at a fixed price.
That conversion price is ¥339 per share, which is a 29.89% premium to the closing price on the day the bonds were approved. The premium is the standard trade-off in a convertible: the company borrows without paying a coupon, and in return existing shareholders accept the possibility of dilution if the stock climbs above the conversion level.
The proceeds have two designated uses. One portion goes to repaying loans that are collateralized by Bitcoin, and the other to financing the share repurchases. Roughly ¥28.3 billion is earmarked for buybacks and about ¥23.6 billion for repaying borrowings. None of the bond proceeds are intended for buying additional Bitcoin, which sets this deal apart from earlier financings by treasury companies that raised debt specifically to add coins.
For readers unfamiliar with the instrument, a convertible bond is a hybrid between debt and equity. The issuer owes the face value at maturity, but the holder may exchange the bond for a fixed number of shares instead. Because that option has value, investors accept little or no interest. Companies with volatile share prices, such as those tied closely to Bitcoin, are frequent issuers because the conversion feature is worth more when the stock swings widely.
4. Capital Research and Management raises its stake
One visible side effect of the buyback is a change in who controls the company. Capital Research and Management, the asset manager behind the American Funds, has raised its voting stake in Metaplanet to 11.11%. The increase was helped by the shrinking pool of outstanding voting shares: when a company retires stock, every remaining holder's percentage rises even if they buy nothing.
A stake above 10% is significant for a listed company. It gives the holder a meaningful voice in shareholder votes and signals to other investors that a large, long-horizon manager sees value in the stock. It also means that as repurchases continue, the share of the register held by the biggest investors will tend to grow, which concentrates influence in fewer hands.
That is not necessarily a problem, but it is a governance consideration that comes with any large buyback. Shareholders who value a broad, dispersed register may view concentration differently from those who welcome a large institutional anchor.
Large institutional positions also tend to be sticky. Asset managers of this scale generally build holdings over time and review them against long-term mandates, so a rise in their stake can be read as a vote of confidence. It can also reduce the free float, the portion of shares readily available to trade, which affects liquidity and how easily the price moves on volume.
5. Why do the bonds create a two-sided outcome?
The convertible structure means the outcome depends on where Metaplanet's share price goes over the next five years. If the stock rises above ¥339, bondholders have an incentive to convert their notes into shares. Those new shares would add back some of the supply that the buyback removed, partly offsetting the per-share benefit the company is pursuing.
If the stock stays below ¥339, bondholders are unlikely to convert, and Metaplanet will owe the principal at maturity in 2031. In that case the company has to find ¥52 billion in cash or refinance it. The buyback will then have been paid for with borrowed money that eventually has to be repaid, which puts a premium on how the Bitcoin position and the stock perform in the intervening years.
The two scenarios explain why the market treats convertible-funded buybacks as a bet on the company's own share price. Management is effectively betting that its shares are cheap today and that either a rising price or a stable one will leave the structure in better shape than before.
Investors weighing the deal usually compare two costs. One is the dilution that conversion could bring if the stock rallies. The other is the repayment burden if it does not. Because the bonds carry no coupon, there is no annual interest bill in the meantime, which leaves the company with more flexibility during the years before maturity than a conventional loan would provide.
6. Why leverage is part of the story
Part of the bond money is being used to pay down loans secured by Bitcoin. That detail matters because collateralized borrowing exposes a treasury company to falling prices. If Bitcoin drops sharply, lenders can demand more collateral or force a sale, and companies in that position often have to choose between adding collateral and selling coins at a bad moment.
Using fresh convertible debt to retire collateralized loans swaps one type of obligation for another. The new bonds carry no coupon and have no margin-call mechanism, so they are less likely to force a sale during a downturn. For a company whose strategy is to keep its Bitcoin, reducing the risk of a forced liquidation is a reasonable priority.
Dedicating the proceeds to deleveraging and buybacks, rather than to more Bitcoin, also marks a shift in emphasis. Earlier in the treasury-company cycle, growth in coin holdings was the headline metric. Now the market's attention is moving toward balance-sheet resilience and per-share measures.
The broader lesson for the sector is that capital strategy is maturing. Early treasury companies grew by raising money and buying coins as quickly as possible. A company that now spends its financing on retiring shares and reducing secured debt is optimizing for resilience and per-share results, which is how mature holding companies are usually judged. Whether the market rewards that approach will depend on how the shares trade relative to the Bitcoin they represent.
7. What to watch next
Three indicators will show whether the plan is working. The first is the share count: how quickly Metaplanet uses the remaining capacity in its authorization before the program ends in October 2027, and how many shares it actually retires. The authorization is a ceiling, not a commitment, so the real pace will come from the company's disclosures.
The second is the ratio of Bitcoin-backed debt to the value of its Bitcoin. If repayments bring that ratio down, the company's deleveraging message gains credibility. If the ratio stays elevated or rises as prices move, the buyback will draw more scrutiny.
The third is ownership concentration. As the voting base shrinks, large holders such as Capital Research and Management gain relative influence, and any further increase in their stakes could shape governance decisions. Bondholders will also be watching the ¥339 conversion price, since a rally above it would bring new shares into the count.
Further updates from the company, including periodic reports on repurchases completed and the status of its borrowings, will indicate how much of the authorized amount has been used. Because the program has no fixed schedule, those disclosures are the clearest way for shareholders to follow progress through the remainder of the year and into 2027.