ALAB is the Nasdaq ticker for Astera Labs, a San Jose chip designer that sells the connectivity silicon sitting between GPUs, CPUs, memory and network cards inside AI servers.
Revenue was $392.4 million in the quarter ended 30 June 2026, up 104% year over year, per the company’s 10-Q. Four customers supplied 82% of it.
Why the wire became the problem
Each PCIe generation doubles the data rate. PCIe 6.0 runs at 64.0 GT/s per lane, twice PCIe 5.0, according to the PCI-SIG specification page.
A faster signal degrades over a shorter stretch of copper. An AI rack runs those links across boards and cables between the GPU tray and the head node, so the signal has to be recovered along the way or the link drops to a slower rate.
Astera’s 10-K describes its Aries retimer as a chip that digitally recovers a degraded signal and retransmits a clean copy, extending how far a cheap interconnect can reach.
Four product families, one software layer
Aries covers PCIe and CXL retimers and smart cable modules. Taurus does the same job for Ethernet between servers and switches. Leo is a CXL controller that lets processors pool standard DRAM over a serial link.
Scorpio is a fabric switch, with a P-Series for PCIe 6.0 head-node traffic and an X-Series for GPU-to-GPU clustering. All four families run the company’s COSMOS software for configuration and diagnostics, which the 10-K calls the foundation of the platform.
Management said on 4 August 2026 that Scorpio would become the largest product family in the September quarter, a quarter earlier than guided. That moves the business from signal conditioning toward switching, where optical interconnect suppliers are heading too.
What the Q2 2026 filing shows
First-half revenue was $700.8 million against $351.4 million a year earlier. GAAP gross margin fell 250 basis points to 73.3% in the quarter, which the 10-Q attributes to a heavier mix of lower-margin hardware modules and the warrants booked against revenue.
Operating income was $89.2 million. Net income of $153.1 million looks larger than that because a $50.3 million income tax benefit, tied to equity compensation, landed in the quarter. Pre-tax income was $102.8 million.
Research and development ran at 35% of revenue. Cash and marketable securities stood at $1.3 billion, and half-year operating cash flow was $162.3 million after receivables absorbed $124.0 million.
The concentration questions
Customer A took 29% of Q2 revenue, Customer B 25%, Customer C 15% and Customer D 13%. None is named. The filing adds that some direct customers are manufacturing partners buying for end customers, so the percentages can swing without end demand changing.
The 10-Q assigns $152.7 million of Q2 revenue to China, $113.7 million to Singapore and $105.8 million to Taiwan, with $5.5 million to the United States, and lists US-China export controls among the risk factors.
One customer is visible through the notes. Astera has issued warrants to Amazon NV Investment Holdings three times, most recently 3,262,299 shares at $142.82 in February 2026, vesting as Amazon hits purchase tranches. The vesting is booked as a reduction of revenue.
Manufacturing is single-sourced. The 10-K states that TSMC fabricates all of the company’s ICs and no second foundry has been qualified, so TSMC’s capacity decisions govern Astera’s supply. Leo also depends on the DRAM market that HBM demand is already straining.
What does Astera Labs actually sell?
PCIe and CXL retimers, Ethernet cable modules, CXL memory controllers and fabric switches for AI servers, plus the COSMOS software that runs on them.
Who are Astera Labs’ customers?
The 10-Q does not name them. It discloses four customers at 29%, 25%, 15% and 13% of Q2 2026 revenue, and shows warrants issued to an Amazon subsidiary.
Is ALAB profitable?
Yes on a GAAP basis. Q2 2026 operating income was $89.2 million on $392.4 million of revenue, per the 10-Q, with net income of $153.1 million lifted by a $50.3 million tax benefit.
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