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Astera Labs, Inc. (ALAB) — chart, structure and Closelook read

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Company snapshot — Astera Labs, Inc.

ALAB in five paragraphs: what it makes and sells, where it sits in the Closelook stack, who it is priced against, why we track it, what we watch. Research diary, not advice.

What it does
Astera Labs builds connectivity chips that link processors, memory and storage inside AI servers, plus retimers, smart cable modules and switch silicon. Its COSMOS software manages and tunes these links across large fleets. Customers are hyperscale cloud operators and server makers who need reliable high-speed links inside AI racks. It is based in San Jose and went public in 2024.
Where it sits in the stack
In our Rubin Build-Out 100 index, Astera Labs sits in Layer 5, Connectivity & Materials, within the High-Speed Interconnects sleeve — the fabric that turns separate GPUs into a working cluster. It is a supplier hyperscalers depend on to keep signal integrity as racks scale, so it is a constraint on how fast clusters can be wired together.
Who it is priced against
Closelook's peer group groups it with custom silicon and optical interconnect names — Marvell, Broadcom, Nvidia and Credo Technology — reflecting who the market prices it against rather than shared sector labels. Cisco Systems is the additional networking name sometimes drawn into the comparison.
Why Closelook tracks it
It is a Rubin Build-Out 100 constituent and carries a Closelook score, strongest on quality and weakest on valuation. The diary has quoted it in a Nvidia ecosystem report on signal and fabric roles, and in Morning 10 and Midday 10 notes tracking interconnect names on volatile trading days.
What the diary watches
Whether interconnect demand tracks the pace of new AI cluster builds, or whether the stock keeps trading as a proxy for how fast that build-out is expected to run.

Astera Labs, Inc. (ALAB) trades on US exchanges, classified under Technology, and sits in Layer 5 of the build-out stack. Constituent of Rubin Build-Out 100.

The Closelook company score reads 58/100 composite (momentum 54, quality 75, valuation 7) across 7 modules — the full breakdown, chart structure and analog history load live above.

Written from the company’s public profile and Closelook’s own readings, 2026-09-17. Descriptive, refreshed with the registry; corrections welcome via the imprint. closelook.net is an investment research diary — market structure, index membership and scores are our own readings, not investment advice. Related: index compare · sector dispersion · scanner.

Signals for this name

Every Closelook reading that exists for ALAB, from the same nightly bakes the boards use. Research diary readings, not advice.

Who it is priced against Custom silicon and optical interconnect · 4 names with week and year-to-date

Peer group

Custom silicon and optical interconnect

Curated competitor set — who the market prices this name against, not just who shares its sector.

Compared against ALAB on the nightly bakes; the Peers tab ranks the cohort on the Closelook scores where it exists.

Versus its index Rubin Build-Out 100 — the name, its sleeve and the index over day, week and month

Versus its index

The name against its Closelook index and its own sleeve — equal-weight, nightly closes.

Rubin Build-Out 100 · as of 2026-09-17

DayWeekMonth3 months
ALAB+9.1%+3.2%−3.3%−21.7%
High-Speed Interconnects+1.9%−1.1%−3.1%—
Rubin Build-Out 100+1.5%−2.2%−2.9%—

Against the index: 5.4 pts ahead on the week, 0.4 pts behind on the month; against its High-Speed Interconnects sleeve 0.2 pts behind on the month.

Returns from the index workers’ nightly closes; equal-weight sleeves. A relative reading from the research diary, not advice.

Weather around the name 4 macro readings: Money Temperature, Factor regime, Sector × region …

The weather around this name

Macro readings that apply by membership — the regime, the factor tape, the sector cell, the funding backdrop.

  • Money Temperature Composite 55/100 · S&P 500 fund at 58, above its 50- and 200-day averagesEight instruments scored on position, momentum, volume, volatility and fragility — the regime every name trades inside. Temperature lab → 2026-09-17
  • Factor regime Momentum leading — risk appetite buildingMomentum against low volatility (SPMO / SPLV): above its 50-day trend, 94th percentile of the window, +2.7% over 20 sessions. Factor regime → 2026-09-17
  • Sector × region Technology in US: −2.1% week · −3.4% month · −1.2% quarter · +32.1% yearThe Sector Engine cell this name lives in, from XLK.US; the 11 × 4 matrix shows where its sector is being bought and where it is being sold. Sector Engine → 2026-09-16
  • Sovereign pressure Index 0.00 · down 0.41 over 21 sessionsG7 long-end yields, 10s30s and the slope — the funding weather for every balance sheet on this site. Sovereign pressure → 2026-09-17

FAQ · from the current data · as of 2026-09-18

Quick answers

What is Astera Labs, Inc. (ALAB)?

Astera Labs, Inc. trades as ALAB on the US exchange (US) and is classified under Technology in the Closelook research universe, as of the registry build of 2026-09-18.

Is ALAB in a Closelook index?

Yes — Astera Labs, Inc. is a constituent of Rubin Build-Out 100, as of 2026-09-18.

What is Astera Labs, Inc.'s Closelook composite score?

58 out of 100, with momentum 54, quality 75 and valuation 7 sub-scores, as of 2026-09-18. Scores are Closelook's own research readings, not ratings or investment advice.

Where does ALAB trade against its moving averages?

Up 9.1% at the close: one of the day's strongest moves. As of 2026-09-17 — a technical state from the nightly Closelook bake, not advice. The Technical tab carries the full row.

How is ALAB doing against its Closelook index?

Over the past month Astera Labs, Inc. is −3.3% against −2.9% for the Rubin Build-Out 100 — 0.4 points behind its index, as of 2026-09-17. Its High-Speed Interconnects sleeve is −3.1% over the same month. The “Versus its index” table on this page carries the day, the week and the month for the name, its sleeve and the index.

What does Astera Labs, Inc. do?

Astera Labs builds connectivity chips that link processors, memory and storage inside AI servers, plus retimers, smart cable modules and switch silicon. Its COSMOS software manages and tunes these links across large fleets. Customers are hyperscale cloud operators and server makers who need reliable high-speed links inside AI racks. Closelook's peer group groups it with custom silicon and optical interconnect names — Marvell, Broadcom, Nvidia and Credo Technology — reflecting who the market prices it against rather than shared sector labels. Cisco Systems is the additional networking name sometimes drawn into the comparison.

Where does Astera Labs, Inc. sit in the AI build-out?

In our Rubin Build-Out 100 index, Astera Labs sits in Layer 5, Connectivity & Materials, within the High-Speed Interconnects sleeve — the fabric that turns separate GPUs into a working cluster. It is a supplier hyperscalers depend on to keep signal integrity as racks scale, so it is a constraint on how fast clusters can be wired together. It is a Rubin Build-Out 100 constituent and carries a Closelook score, strongest on quality and weakest on valuation. The diary has quoted it in a Nvidia ecosystem report on signal and fabric roles, and in Morning 10 and Midday 10 notes tracking interconnect names on volatile trading days.

Where has Closelook written about Astera Labs, Inc.?

Astera Labs, Inc. appears in 13 Closelook pieces, most recently Morning 10: Yen — the Bank of Japan hikes and the dollar holds 157: the carry trade pays, the lines held, chips +3.4% over $505 (2026-09-18); Morning 10: Rates — the Fed hikes and the 10-year closes above 5%: the belly sold, the relief unwound, chips back under $505 (2026-09-17); Morning 10: AI trade — sellers of compute sold, buyers bought: chips −5.6%, software +5%, SoftBank +7% in Tokyo (2026-09-15). What Closelook said most recently: The design side was bought wide — Arm +8.6%, Intel +7.7%, AMD +6.4% to $545.09, Micron +5.5% to $977.50, Marvell +4.8%, TSMC +3.0%, Nvidia +2.5% to $219.34, Astera Labs +9.1% — and the equipment three only stopped falling: Applied… (Morning 10, 2026-09-18). The "Mentioned on Closelook" block on this page lists the long reads, the reference entries and the dailies that name it.

What does this page show?

A live price chart with SMA overlays and drawing tools for ALAB, performance metrics, index-membership context and the Closelook structure read — an investment research diary view, not investment advice.

Mentioned on Closelook 13 pieces · newest: Morning 10, “Yen — the Bank of Japan hikes and the dollar holds 157: the carry trade pays, the lines held, chips +3.4% over $505” (2026-09-18)

Mentioned on Closelook

Where ALAB appears in the diary — 13 pieces, newest first. Every link is our own writing.

Long reads

Dailies

Related in the Closelook universe