What Does Besi Do? The Hybrid-Bonding Tool Model

STACK · Semiconductors · Status: Tightening · Last reviewed: 10 Nov 2026

Besi gets paid when a die-attach or hybrid-bonding tool is recognised, while the high-bandwidth memory cube beside an AI die has not been shown, in this release, to have changed join.

Why this sits on the map: a die is not a package until a machine places it. Hybrid bonding is the copper-to-copper join, with no solder microbump between the dies. CoWoS is still the package that parks a memory cube beside the compute die. Those are neighbour clocks. This page is the company that sells the placement tool.

Numbers that matter

Dated 22 October 2026, for the quarter and nine months ended 30 September 2026. Euros are Besi's. The book-to-bill, the regional change and the net-cash identity are our arithmetic.

What does it actually do?

Besi sells the machines that attach and stack chips. It does not sell the chip. Customers, in the 22 October release, are semiconductor manufacturers, foundries, assembly subcontractors, and electronics and industrial companies. One clock is the tool already in volume: flip-chip and multi-module die attach, plus datacenter and photonics shipments. The other is wafer-level assembly: hybrid bonding, and a thermo-compression tool it calls TC Next. Hybrid bonding mates copper pads with no solder microbump in between.

The release does not split the €283.4 million across those clocks. Versus the prior quarter, revenue rose €33.5 million, or 13.4%, "due primarily to increased shipments for datacenter and AI related mainstream computing applications." Versus a year earlier it rose €150.7 million, or 113.6%, with "strength in hybrid bonding, photonics and datacenter applications." For the nine months, computing growth came "principally" from photonics and datacenter work and, "to a lesser extent," from hybrid bonding. The order line is where hybrid bonding is loudest.

Orders were €342.6 million, tied "primarily" to hybrid bonding, datacenter and AI-related mainstream computing, including power management. Year-to-date hybrid-bonding orders "have more than doubled versus fiscal 2025," with no euro base given. Customers reached 23. Cumulative demand exceeded 215 systems, a life-to-date count, not a shipment count. Third-quarter hybrid-bonding orders came from logic, co-packaged optics and memory.

The separating sentence is this: Besi "received orders for both hybrid bonding and TC Next systems from a leading memory customer as they focus on the development of current and next generation HBM device structures." Development is not a cube shipped on a copper bond. The company says memory shortages have extended lower stack heights in current HBM production, that interest in hybrid bonding has increased, and that it anticipates adoption "in a range of stack heights over the next two years," with DRAM bonded onto accelerator chips "by the end of the decade." That is an outlook, not a dated start. The cube's invoice is on the Korea door and in HBM, explained.

The supplemental table places the invoice, and names neither customer nor country inside Asia. Revenue was China €97.1 million (34%), Asia Pacific excluding China €158.6 million (56%), and Europe, the United States and other €27.7 million (10%). Orders were China €137.5 million (40%), Asia Pacific excluding China €167.5 million (49%), and Europe, the United States and other €37.6 million (11%). Integrated device manufacturers were 41% of orders (€140.4 million). Foundries and subcontractors were 59% (€202.2 million).

Against the prior quarter, China revenue fell €1.2 million, to €97.1 million. Asia Pacific excluding China rose €37.7 million, to €158.6 million. Europe, the United States and other fell €3.0 million. Those moves add to the €33.5 million revenue increase (our arithmetic). Recognised growth was outside China. China orders rose from €102.4 million to €137.5 million. The release does not say why, and it does not split Korea from Taiwan. IDM orders rose 28.2%, to €140.4 million, against a 10.3% rise in foundry and subcontractor orders (our arithmetic). It does not tie that IDM increase to the unnamed memory customer.

How does it make money?

Besi is paid when a tool is recognised as revenue. A signature is not yet revenue, and the chip designer's sale is a later invoice. Gross profit was €184.8 million. Gross margin was 65.2%, down 0.5 points from 65.7% and up 3.0 points from 62.2% a year earlier. The company says the margin beat its prior guidance on mix and on price increases passed through against supply-chain costs. It does not restate that old guide as a number.

Cost of sales was €98.6 million, 34.8% of revenue (our arithmetic: 98.6 ÷ 283.4). That is the tool's own cost, not a pass-through bill. Operating expenses were €55.1 million, of which research and development was €23.5 million. Operating income was €129.7 million, a 45.8% margin, against €34.1 million a year earlier. Operating expenses rose 13.5%, from €48.5 million to €55.1 million, while revenue rose 113.6% (our arithmetic). That is where the money sticks: in a designed machine, once it is recognised.

Net income was €107.2 million. Net margin was 37.8%, against 19.0% a year earlier (37.8 ÷ 19.0 = 1.99, our arithmetic). For the nine months, revenue was €718.1 million, orders €905.2 million and net income €247.8 million. Year-to-date book-to-bill was 1.26. Last-twelve-month orders are stated at €1.2 billion. The four supplemental quarters add to €1,155.6 million (our arithmetic).

The fourth-quarter guide times recognition, not orders. Revenue is guided flat, plus or minus 5%, versus €283.4 million, because some customers want third-quarter orders delivered against first-half 2027 line plans. The band is €269.2 million to €297.6 million (283.4 × 0.95 and × 1.05). Gross margin is guided to 63–65%. Operating expenses are guided up 5–10% from €55.1 million, or €57.9 million to €60.6 million (our arithmetic), mainly for strategic consulting.

What limits it?

Not the order. Orders were 1.21 times revenue. The company says momentum should continue and that it is gaining share in flip-chip die attach. The release has no unit split to test that claim.

The limit it names is the customer's hall. Part of the €342.6 million is dated to first-half 2027 line plans, not to this quarter's dock. Besi's own plant is not the late cheque. Property, plant and equipment was €58.5 million. Capital expenditure was €2.8 million and capitalised development €5.7 million, together €8.5 million, against operating cash of €107.1 million (our arithmetic). Headcount was 2,403, including 402 temporary staff. The tool company is waiting on someone else's floor.

Cash is not the bind. Cash was €371.9 million, deposits €220.0 million and long-term debt €345.3 million. Cash plus deposits minus that debt is €246.6 million, the net-cash line (our arithmetic). It rose €82.6 million in the quarter. The bank balance rose €22.8 million and deposits rose €60 million. Working capital absorbed €30.3 million, and receivables rose from €254.1 million to €274.6 million, 0.97 times revenue (our arithmetic). Booked is not the same as collected, and ordered is not the same as shipped.

Who gets paid now: Besi on recognition, suppliers through €98.6 million of cost, and shareholders through a €15.8 million buyback of about 75,000 shares at an average €210.67 (75,000 × €210.67 = €15.8 million, our arithmetic). A new €100 million programme runs from 27 October 2026 to October 2027. That price is what was paid, not a view on value, and the buyback does not install a bonder. Who pays is the 59% foundry and subcontractor book and the 41% IDM book.

The cube is the second limit, on another clock. Logic, co-packaged optics and edge AI can fill a hybrid-bonding book while current HBM stays on the lower stacks the shortage extended. The memory order here is a development order, on hybrid bonding and TC Next together. Stack-height adoption is the next two years. DRAM on an accelerator is the end of the decade. Until a memory house says otherwise, the cube beside an AI die has not switched.

Who else does this?

Applied Materials is on the tool and, since 26 October 2026, on the register. Besi's 27 October release says Applied raised its stake to about 20%. As Besi reports it, Applied will not seek a board seat and has no current plan to buy more. They have collaborated since 2020, Applied on front-end steps and Besi on placement. The €283.4 million is still Besi's revenue. The 20% is equity, not a second cost line. See what Applied Materials does.

Besi says it does not view ASML as a hybrid-bonding competitor. To the best of its knowledge, ASML's interest is 3D transistor stacking inside the chip over the next decade, not die-to-wafer bonding. ASML has not confirmed that here. Treat it as Besi's. This release names no foundry and no subcontractor as the buyer. TSMC keeps the leading package. ASE runs outsourced attach and test. Neither link means either firm placed this order. The week-of note is the Wire.

What would change this view?

Fourth-quarter revenue outside €269.2 million to €297.6 million, or a statement that the flat guide was a cancellation rather than a first-half 2027 delivery date. A low miss with orders still high would say the hall slipped. A beat put down to earlier delivery would say the hall arrived.

A euro or unit split for hybrid bonding would show whether the order headline is the invoice. Orders can have more than doubled against an undisclosed 2025 base and still be a modest share of €342.6 million. A memory house naming hybrid bonding as the production method for a dated stack would move the cube. If the next prints still describe the current stack, the two-year line stays an outlook. Watch SK hynix's third-quarter HBM4 note.

Applied taking a board seat, buying beyond the stake it described, or invoicing the tool in place of Besi would change who gets paid for placement. The 27 October release says that is not the plan. China orders giving back the rise from €102.4 million to €137.5 million, while Asia Pacific excluding China stops carrying recognised growth, would weaken the geography read.

Practical takeaways

Orders and shipments are two clocks. €342.6 million booked, €283.4 million recognised, book-to-bill 1.21. The next quarter is guided flat because some orders wait on a first-half 2027 line.

The margin is the model. Gross margin 65.2%, operating margin 45.8%, cost of sales 34.8% of revenue, plant €58.5 million. Operating cash was €107.1 million. Capital spending and capitalised development were €8.5 million together. This quarter's cash is not building Besi a new fab.

Recognised growth was outside China, up €37.7 million in Asia Pacific excluding China, while China revenue fell €1.2 million and China orders rose to 40% of the book. The cube has not switched on this document: 23 hybrid-bonding customers, demand above 215 systems life-to-date, and a memory order described as development. Applied's 20% is the register, not the invoice. The €100 million buyback does not date a join.

FAQ

What does Besi do?
Besi sells assembly equipment that places and stacks chips. It does not sell the chip. In the quarter to 30 September 2026, revenue was €283.4 million and orders were €342.6 million.

Where does Besi's profit sit?
In the tool, when a shipment is recognised. Third-quarter gross margin was 65.2% and operating margin 45.8%. Cost of sales was 34.8% of revenue (our arithmetic). Net income was €107.2 million.

Why can orders rise while the next quarter is guided flat?
Orders were 1.21 times revenue (our arithmetic). Fourth-quarter revenue is guided flat, plus or minus 5%, versus €283.4 million, because some customers want delivery lined up with first-half 2027 production plans. That band is €269.2 million to €297.6 million (our arithmetic).

Has the HBM cube switched to hybrid bonding?
Not on this release. A leading memory customer ordered hybrid-bonding and TC Next systems for development of current and next HBM structures. Besi puts stack-height adoption over the next two years. It does not give a euro split of hybrid-bonding orders.

Is this a recommendation to buy Besi shares?
No. This page explains how Besi makes money and where it can get stuck. It gives no buy or sell calls. Not investment advice. Do your own research.

Keep reading on the map

Layer: Semiconductors. Also on the layer: Applied Materials, ASML, TSMC and ASE. Explained: hybrid bonding, CoWoS and HBM. Markets door: Korea, and the quarter's cube print, who gets paid while SK hynix ships HBM4. Wire: Besi's €342.6 million order book, and the cube still on bumps.

Get the Wire — short notes when bonder orders, delivery dates and the memory join move.

Not investment advice. Do your own research.

How we check this

Figures come from Besi's 22 October 2026 results release, including the statements and the geography table, and from its 27 October 2026 note on Applied Materials' stake. Read on 10 November 2026. No figure is taken from a secondhand transcript. Ratios, bands and the regional change are marked our arithmetic. Who gets paid, and the hall and the cube as the two limits, are our read. The featured image is a graded cleanroom photograph, not a Besi factory. No buy or sell call. Not investment advice.

Last reviewed: 10 Nov 2026 · Next review: after Besi's fourth-quarter and full-year results, which the company schedules for 25 February 2027, or sooner if a memory house names a hybrid-bonding production start.

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