Arteris sells no chips. It licenses network-on-chip interconnect — the internal plumbing that moves data between processor cores, accelerators and memory controllers inside a system-on-chip — to automotive, consumer and data-center designers, and it collects money twice: a licence fee when a customer starts a design, then a royalty on every unit shipped, often three or four years later. In the June quarter the first half of that model worked unusually well. Revenue rose 46.2% to $24.1m, the fourth consecutive quarter of acceleration from 18.3% a year earlier. Annual contract value plus royalties reached a record $99.5m, up 44%. Remaining performance obligations — contracted work not yet recognized — hit a record $135m. Management raised full-year revenue guidance to $95-98m and reiterated a target of non-GAAP operating profit by the fourth quarter.

The shares have gone the other way with unusual violence. Arteris closed at an all-time high of $48.59 on 30 June and at $24.83 on 19 August — down 48.9%, the steepest fall in a group that includes Astera Labs, Arm, SanDisk and Cadence. The first leg was company-specific: a 21% single session in early July on aggressive insider selling, a disclosed CFO departure and valuation after a rally of more than 350%. The second leg was not. On 18 August a closely watched semiconductor gauge fell 5% on fears that AI infrastructure spending is peaking, the same day the 30-year Treasury yield touched 5.323%, a 19-year high.

Why duration is the whole argument

A higher long rate hurts distant cash flows most, and Arteris's cash flows are about as distant as semiconductors get. Trailing royalties were $8.6m — growing 65%, but still under 9% of the bookings base. Consensus does not show positive earnings per share until 2027. Data-center and AI infrastructure reached roughly 29% of bookings in the first half, on the back of a hyperscale cloud company standardizing on its infrastructure silicon, but those sockets pay per-unit royalties years from now.

The bear case is not demand. It is dilution and cost. The GAAP operating loss widened to $13.9m from $8.2m, gross margin slipped to 85.1% from 89.4%, and the diluted share count rose 13% to 47.3m after a $72m at-the-market equity raise struck above $35 — roughly 30% above today's price. Arteris holds $123m of cash and no debt, so runway is not the question; the question is what the equity was worth when it was sold. At 15.6x trailing gross profit the stock is well below May's roughly 23.5x, but still about 55% above the roughly 10.1x it carried in February. The de-rating has retraced two-thirds of the spring re-rating, not all of it.

What Arteris does own is position. It is the second-largest chip-infrastructure IP vendor behind Arm, with an estimated 31.3% share of interconnect IP, competing as a single-component specialist against Synopsys and Cadence, whose full design flows come bundled. No customer exceeded 10% of licence revenue in the first half — the first such period in over six months.

The same layer, with silicon attached

Rambus shows what happens when royalties are already cash. It licenses memory and interconnect IP but also sells DDR5 register clock drivers and companion chips that ship one per server memory module, and it holds roughly 40% of that market against Renesas and Montage Technology. June-quarter revenue was a record $207.4m, up 20.4%, at a 79.8% gross margin, with record product revenue of $99.2m. It guided the September quarter to $210-216m and disclosed a next-generation high-bandwidth-memory design win at a Tier 1 US hyperscaler.

It still fell 32.0% over three months, to 16.6x trailing gross profit from roughly 26.1x on 20 May — while that gross profit grew 28.3%. Over the same three months Micron rose 28.0% and SanDisk 12.7%. The companies whose modules carry Rambus's chips re-rated; the licensing layer that supplies them did not. One caveat sits under the product story: registered-DIMM bit supply is forecast to grow 15-20%, a ceiling on units no design win removes.

The setup

Where it stands — Both chip-IP licensors are compounding faster than before while their multiples compress, with the August leg driven by rates and AI-capex fear. Would confirm — Arteris exiting 2026 with bookings of $102-106m and a positive non-GAAP operating result in the fourth quarter. Would invalidate — Arteris royalties stalling near $8.6m or fresh equity issued below $25 a share. Watch next — Sarab Sinha becomes Arteris chief financial officer on 8 September; Rambus reports the September quarter in late October. Valuation — Arteris: 15.6x trailing, 14.0x forward gross profit, versus 23.5x in May and 10.1x in February; Rambus 16.6x trailing.