One Wallet Was 81.5% of WisdomTree's Tokenized Money Fund. In October It Took Back US$600 Million.

A single Ethereum wallet held 81.5% of WisdomTree's tokenized Treasury money market fund at the end of September, and between October 15 and October 29 it redeemed US$600 million, 92% of everything the fund paid out that month. The fund, WTGXX, ended October with US$668.32 million in net assets, smaller than it was in June. Its sponsor is selling it as the cash layer for an onchain financial system. In September WisdomTree and MoonPay announced a planned access point using MoonPay's network of more than 35 million accounts, and on October 28 coverage of a new BitGo distribution deal cited the fund's US$1.2256 billion in assets as of September 29; by then the wallet had redeemed US$500 million of it. Measured by its holders, the US$1.23 billion fund at the end of September was one wallet's 1.0 billion shares plus US$227.67 million held by everyone else.

The fund's growth and its decline were the same wallet

WTGXX is a registered government money market fund whose shares exist as tokens: WisdomTree's monthly filings with the SEC report one share class, priced at US$1.00. The wallet, which has never initiated a transaction of its own and whose shares are issued and redeemed by the fund's transfer agent, built its position in round lots from May 2025 and already held 500 million shares, about 70% of the fund, at the end of June. It added 50 million on July 9, 250 million on August 26 and 200 million on September 1. Those 500 million new shares were 95% of the US$527.92 million of gross subscriptions the fund recorded in the third quarter, and more than 90% of each month's subscriptions. They are also the bulk of the growth WisdomTree reported for its onchain business, whose assets rose from US$761 million to US$1.27 billion in the quarter.

The exit came in four transactions, each at about 19:35 UTC: 200 million shares on October 15, 200 million on October 19, 100 million on October 21 and 100 million on October 29. The fund's October filing records US$649.80 million of gross redemptions against US$90.51 million of new subscriptions; the wallet accounts for 92% of the redemptions. The shares were burned on Ethereum and not reissued on another network: the fund's total net assets fell by the same amount as its Ethereum supply. The wallet held 400 million shares at the end of October, 59.9% of the fund. The rest of the holder base moved the other way. Every other holder combined held US$217 million at the end of June and US$268 million at the end of October, a 23% increase that the headline figure never showed, in either direction.

WisdomTree calls it seasonal, which is the finding

Nothing in the episode resembled stress. On October 30 the fund held 99.99% of its assets in instruments that mature or can be sold within a day, its weighted average maturity at month-end was 13 days, and its net asset value held at US$1.00 throughout. On the company's third-quarter call on October 30, the day after the last redemption, Will Peck, WisdomTree's head of onchain, said “while we have had some recent seasonal inflows and outflows, the trend line remains consistent,” and named stablecoin reserves, cash management and collateral mobility as the main uses for WTGXX. He did not attribute the flows to any holder.

Taken at its word, that description is the finding. Money held for cash management moves with its owner's needs: in when there is cash to park, out when it is needed elsewhere. When one wallet is four-fifths of a fund, whether it holds one investor's cash or several clients' through a custodian, the fund's size reports that wallet's position. WTGXX grew 71% between June and September and gave back more than the increase in two weeks, while its other holders' combined balance stayed between US$215 million and US$268 million. Similar structures appear elsewhere. One wallet holds 23.64 million of the 25.84 million tokens of Fidelity's FDIT, 91.5% of the fund's tokenized share class; the fund's larger Liquidity class is not onchain. BlackRock's BUIDL, the category's largest fund, lost 35% of its assets in 90 days, three-quarters of the decline from one holder, Grove, leaving.

What a tokenized money fund's size measures

Tokenized Treasury funds are counted, ranked and rated by their assets under management, and the category total is the figure most often cited as evidence that institutions are moving cash onchain. At WTGXX that figure rose 71% in a quarter and fell 46% in a month on one wallet's movements, while the rest of the holder base grew 23% and was invisible in the total. A fund this concentrated carries little credit risk, since it holds short-dated government paper, but its size says little about how many investors rely on it. For the sponsor, the exposure is commercial: most of the fund's fee income rests on one wallet's balance, and its growth can reverse in a fortnight.

WisdomTree is building the channels that would change this. The MoonPay arrangement is still being developed, and BitGo announced access for its institutional clients in late October. Both are routes to the kind of broad holder base that would make WTGXX's size a measure of adoption rather than of one wallet's cash. Until they deliver it, the 400 million shares the wallet held at the end of October, 59.9% of the fund, will largely set its size. The open question for the category is whether retail and institutional distribution can produce funds held by hundreds of meaningful investors, or whether tokenized money funds remain cash accounts for a handful of treasuries, growing and shrinking with them.