RJO contributed the equivalent of 78% of StoneX’s quarterly derivatives-volume increase

StoneX handled 97.944 million listed-derivative contracts in its fiscal third quarter ended 30 June 2026, up from 56.759 million a year earlier. The 41.185 million increase represents 72.6% growth. A disclosed R.J. O’Brien contribution of 32 million contracts is equivalent to 77.7% of that increase. The acquisition therefore accounts for much of the change in the reported comparison, while a separate calculation is needed to assess the remainder of the business.[1]

The distinction has practical consequences for brokers that rely on financial intermediaries for futures and options execution, clearing and client-asset services. Acquisitions may add accounts, teams, exchanges, correspondent relationships and client equity at once. They can also increase operating expenses and integration risk. A headline contract count is a record of activity, not necessarily evidence that the original organisation has attracted those same transactions organically. StoneX explicitly identifies the acquired contracts, making an acquisition-adjusted calculation possible without speculation about client identity.[1]

This reconstruction compares listed-derivative contracts, average client equity and revenue capture, then contrasts them with the group’s FX/CFD performance. The relevant transaction is StoneX Group Inc.’s acquisition of the R.J. O’Brien global business, effective 31 July 2025. The acquired operation was absent from the June 2025 comparison and present throughout the current nine-month period, which began on 1 October 2025.[1][2]

Decomposing the contracts

The published quarterly activity figures are stated in thousands of contracts. Convert 97,944 thousand to 97.944 million and 56,759 thousand to 56.759 million. Their difference is 41.185 million. StoneX states that R.J. O'Brien contributed 32 million listed-derivative contracts during the June 2026 quarter. Removing that acquired contribution leaves an illustrative 65.944 million contracts from the rest of the current business. Compared with the previous year's 56.759 million, this remainder is larger by about 9.185 million, or 16.2%.[1]

The resulting 16.2% is a carefully labelled bridge, not an audited same-store growth rate. The historical group may have changed through other acquisitions, disposals, reclassifications or internal routing. An acquired client's orders may be serviced using existing StoneX teams, and the classification of volume can be more complex than subtracting the name of one purchased firm. The published footnote gives a useful contribution estimate. It does not isolate every operational change needed for a fully controlled organic-growth study.[1]

The nine-month figures strengthen the pattern. Listed-derivative contracts rose from 171.092 million to 279.217 million for the comparable nine-month periods, an increase of 108.125 million. The R.J. O'Brien contribution stated for the current nine months was 100.8 million contracts. In absolute terms that is equivalent to about 93.2% of the entire nine-month increase. Subtracting it gives approximately 178.417 million non-RJO contracts, just 7.325 million above the previous aggregate base, or around 4.3%.[1]

Subtracting the June quarter from the nine-month period provides a further timing check. In the first six months of fiscal 2026, total contracts were 181.273 million and the disclosed RJO contribution was 68.8 million. That leaves 112.473 million, against 114.333 million in the equivalent six months of fiscal 2025, or about 1.6% less. The quarter’s 16.2% increase in the remainder therefore follows a first-half decline on the same subtraction basis; the nine-month increase of 4.3% combines those different periods.[1]

In the first half, RJO’s 68.8 million contracts exceed the combined group’s 66.94 million increase. That is arithmetically possible because the rest of the reported volume was lower. It also shows why the acquisition share of growth is a bridge, not a permanent attribute of the enlarged company: the ratio changes when the existing business accelerates or contracts. The inputs for RJO are rounded and the subtraction still does not control for other changes in the business perimeter.[1]

Client equity changed even more dramatically

StoneX reported average client equity associated with listed derivatives of $15.007 billion in the 2026 quarter, compared with $6.558 billion in the 2025 quarter. That is a $8.449 billion rise, about 129%. The same footnote attributes $6.6 billion of average client equity in the later quarter to the R.J. O'Brien business. Removing the acquired amount produces an indicative $8.407 billion for the rest, compared with $6.558 billion a year earlier: growth of about 28.2%. The capital entrusted to the combined clearing franchise therefore rose much more than the older business's indicative contract count.[1]

These are average client-equity figures, not company-owned unrestricted cash. At a futures commission merchant, customer funds and securities held in connection with regulated futures activities are subject to specific safeguarding and segregation regimes. The precise asset treatment depends on the product and clearing entity. The amount provides a measure of the scale of customer relationships and balances against which the firm performs services; it should not be inserted into revenue or earnings calculations. Nor does a rise establish whether each customer earned or lost money.[1]

The acquired equity figure is an average during the quarter, which is not directly comparable with a balance outstanding on the last day of June. It would be improper to subtract the acquisition figure from an end-of-period balance or use the result as liquid capital. The arithmetic above is possible precisely because StoneX presents average client equity and the acquired contribution on the same stated measurement basis. Even then, an adjusted movement may reflect customers moving positions across businesses or changing margin requirements.[1]

Contracts do not equal fees

The company also reports an average rate per listed-derivative contract of $2.61 for the quarter, versus $2.13 a year earlier. That is a 22.5% increase in its specified rate. Simply multiplying total contracts by this rate suggests a higher associated economic yield, but it would not reconcile to every segment line because the definition explicitly excludes some give-up fees, cash and voice brokerage and other services. The footnote matters: the average rate is a managerial performance indicator with a defined perimeter, not an all-inclusive invoice amount for every possible trade.[1]

The customer mix introduced by R.J. O’Brien could affect average revenue capture. Clients use different combinations of contracts, execution and clearing, with different fee schedules. The release does not map acquired and existing clients to their individual rates. The 22.5% increase therefore cannot be attributed wholly to a price rise, nor does it establish that acquired contracts generate the same margins as those elsewhere in the group.[1]

Clearing economics also include interest and fees on customer balances, operational costs, technology, regulatory capital and settlement obligations. A higher level of average client equity can produce interest opportunities under some market conditions, but customers retain rights under the relevant safeguarding rules. Any income attributed to client balances belongs in the firm's reported interest or fee lines, not in an assumed transfer of customer principal to the company. The scale of balances and the earnings they support are connected but categorically different.[1]

FX and CFDs moved the other way

A diversified financial intermediary is not one trading business. StoneX's selected data show average daily FX/CFD contract volume of about $10.780 billion in the June 2026 quarter, down from $12.190 billion in the comparable 2025 quarter, a fall of about 11.6%. The relevant rate per million slipped from $111 to $102, a decline of about 8.1%. Its reported FX/CFD net operating revenue was $62.4 million against $77.4 million, down about 19.4%. These figures demonstrate that a surge in listed derivatives can coexist with shrinking economics in another set of contracts.[1]

The FX/CFD figures cannot be converted into customer losses, dealing profits or execution quality without much more information. Average daily volume is a notional flow, not capital at risk. The rate per million is not necessarily a customer's all-in spread; it is StoneX's defined revenue-capture metric. Net operating revenue includes specified expenses and presentation conventions. A dollar notional executed through the FX/CFD business is not comparable with one listed-derivative contract or with the dollar value of a client-equity account. The different units prohibit simple comparisons.[1]

For an introducing broker or institutional trading counterparty considering StoneX, the distinction is commercially relevant. Contract count may matter for operational capacity, exchange coverage and order routing. FX/CFD trading economics may matter for pricing, market making and risk-transfer services. Customer equity may signal the scale of the clearing operation and its administrative responsibilities. Each requires separate due diligence; a single group growth percentage cannot reliably answer all three questions.[1]

The acquired network and the integration test

The acquisition closed on 31 July 2025, after the June 2025 comparative quarter and before the start of fiscal 2026. At completion, StoneX said RJO supported more than 75,000 client accounts and approximately 300 introducing brokers. It targeted $50 million in expense savings and at least $50 million of capital synergies. These figures describe the acquired network and management’s integration targets, rather than additional contracts won organically after completion.[2]

Those announced benefits provide a separate test of the transaction. The June-quarter results quote chief executive Philip Smith as saying StoneX was beginning to realise benefits from integrating RJO. That is management’s assessment. Tracking expense savings, capital released and cross-selling over subsequent reporting periods would establish how much of the initial ambition has been achieved; the contract-volume subtraction alone cannot answer that question.[1][2]

The general ledger also matters. Consolidated operating revenue, net operating revenue after specified expenses, group net income and adjusted EBITDA are distinct. A newly acquired operation may boost the first while carrying integration expenses that reduce the latter. StoneX reported third-quarter net operating revenue of $719.7 million, up 47%, and net income of $127.9 million, more than double the year-earlier quarter. The earnings performance is real on the company's disclosed basis, but it is not derivable solely from the 73% listed-derivatives volume increase.[1]

What can be claimed after the reconciliation

The robust finding is a proportion: R.J. O'Brien's stated 32 million third-quarter contracts are equivalent to approximately 77.7% of StoneX's 41.185 million year-on-year listed-derivatives volume increase. Across nine months its stated 100.8 million contribution is equivalent to about 93.2% of the increase. These are calculations from contemporaneous company figures, not allegations that the company concealed acquisition effects; its footnote supplied the evidence needed to compute them.[1]

It would be useful for future reporting to trace the acquired firm's contract volume over successive quarters, new versus existing introducing-broker clients, clearing service margins, and the duration and cost of integration. The important questions include how much of the extra activity represents newly won customers as opposed to acquired relationships, how much of the increased interest earning potential persists when policy rates change, and whether the FX/CFD trajectory recovers. No internal client ledger or unpublished contract has been obtained in this investigation.[1][2]

StoneX’s disclosed figures support growth in both the combined listed-derivatives business and the remainder after subtracting RJO’s stated contribution. The latter calculation is not a fully controlled organic-growth measure, but it places the acquisition’s scale in the correct context. Alongside stronger group earnings and weaker FX/CFD revenue, it shows why the composition of growth matters when assessing the enlarged brokerage.[1]

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