Astera Labs booked $18.1 million of “warrants contra revenue” in the third quarter, by our arithmetic from its filings, about 9.6 times the $1.9 million of a year earlier. The charge is tied to warrants it has issued to an Amazon entity, and it is recorded as a reduction of revenue.
The earnings release filed on 3 November shows $30.4 million of warrants contra revenue for the first nine months of 2026, against $4.0 million a year earlier. Its second-quarter 10-Q put the first half at $12.3 million. The difference, $18.1 million, is about 3.1% of third-quarter revenue of $584.9 million, by our arithmetic.
Business Pill · Concentration Explained
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The key insight: By our arithmetic from Astera Labs’ filings, the warrants contra revenue charge tied to its Amazon warrants rose to about $18.1 million in the third quarter, 9.6 times a year earlier, and took about 0.8 of a point off a gross margin that fell roughly 4 points over the year.
Astera’s 2025 annual report says it issued a warrant in October 2022 to Amazon NV Investment Holdings LLC to buy up to 1,484,230 shares at $20.34 each, and an additional warrant in October 2023 for up to 831,945 shares. The shares vest on “specified tranches of global payments by the Holder and its affiliates to the Company”.
On 5 February 2026 it signed a third warrant with Amazon.com NV Investment Holdings LLC for up to 3,262,299 shares at $142.82 each. The second-quarter 10-Q puts the maximum fair value of that 2026 warrant at $280.0 million, and says the charge could be recognised “until January 2, 2033”.
Astera accounts for the warrants as consideration payable to a customer. The annual report says it recognises their fair value “as a reduction of revenue for each sales transaction in proportion to total expected cumulative sales volume resulting in achievement of the vesting conditions”.
Astera Labs’ GAAP gross margin by quarter, as reported and with the warrants contra revenue charge added back to revenue and gross profit (our arithmetic), Q3 2025 to Q3 2026. Source: Astera Labs’ 8-K Exhibit 99.1 of 3 November 2026, 10-Qs and 2025 10-K. The fourth-quarter 2025 and third-quarter 2026 charges are our subtraction from reported totals.Animated: Astera Labs’ warrants contra revenue by quarter, first quarter 2025 to third quarter 2026, from its 10-Qs, 10-K and 3 November 2026 earnings release; the fourth quarter of 2025 and third quarter of 2026 are our arithmetic.
The Quarterly Charge
By quarter, the charge was $0.4 million, $1.8 million and $1.9 million in the first three quarters of 2025, about $1.5 million in the fourth quarter by our arithmetic, then $2.1 million, $10.2 million and $18.1 million in 2026. The fourth-quarter 2025 and third-quarter 2026 figures are our subtraction from the annual, nine-month and half-year totals.
The full-year 2025 charge was $5.5 million, against $1.4 million in 2024 and $0.8 million in 2023. The nine-month 2026 total of $30.4 million is about 5.5 times all of 2025, by our arithmetic.
At 30 June 2026, 1,663,042 shares under the warrants had vested, against 1,165,513 at the end of 2025, and the 10-Q says none had been exercised. The third-quarter 10-Q, which would update those counts, had not been filed on EDGAR when we checked on 4 November.
What It Does to the Margin
The annual report says the charge “reduces the reported gross profit and gross margin in the periods the related revenue is recognized”. Third-quarter GAAP gross margin was 72.3%, against 76.2% a year earlier.
Adding the $18.1 million back to both revenue and gross profit gives a third-quarter margin of about 73.1%, against about 76.4% a year earlier on the same basis, by our arithmetic. On that reading, the warrant accounts for about 0.6 of the roughly 4-point fall, and the rest comes from other factors.
For the second quarter, the 10-Q gave a reason: the decrease was “primarily driven by a shift in product mix towards lower margin hardware modules, as well as the impact of the Warrants”. The third-quarter release we read does not give one.
A Concentrated Customer Base
The annual report says that in 2025 “one end customer represented more than 70% of our revenue; the top three end customers represented an aggregate of approximately 86% of our revenue”. It does not name that customer, and we do not identify it here.
In the second quarter of 2026, four direct customers each accounted for 10% or more of revenue, at 29%, 25%, 15% and 13%, or about 82% together by our arithmetic. The 10-Q says some of them are manufacturing partners buying on behalf of end customers.
What the Risk Factors Say
The annual report lists the concentration as a risk: “A substantial portion of our revenue is driven by a limited number of our end customers”. The second-quarter 10-Q, the latest on file, says there have been “no material changes” from the annual report’s risk factors. The third-quarter 10-Q was not yet on file, so any change for the quarter is not covered here.
Connecting the Coverage
On 3 November we reported that Astera’s outlook points to a $2 billion year, about 2.4 times 2025 by our arithmetic; that piece noted the $30.4 million nine-month warrant line. What’s new here is the quarterly charge, the warrant terms and the margin effect.
As we read the filings, the warrants tie part of Astera’s sales to equity: the shares vest on tranches of payments by the Amazon holder and its affiliates, and their fair value comes off revenue as products are sold.
As we read the margin line, the warrant is a growing but minority part of the fall: about 0.6 of the roughly 4 points year on year, by our arithmetic, while the second-quarter 10-Q also cited a shift towards lower-margin hardware modules.
As we read the annual report, concentration is the wider context: one end customer was more than 70% of 2025 revenue, and the filing does not name it.
Astera Labs, 2025 annual report on Form 10-K
“The timing and magnitude of these charges may vary and could cause fluctuations in our reported gross margins and results of operations.”
Three Implications
FOR INVESTORS TRACKING ASTERA The third-quarter warrant charge was about $18.1 million, about 3.1% of revenue, by our arithmetic; the 10-Q puts the 2026 warrant’s maximum fair value at $280.0 million, recognised as related sales occur, possibly until January 2, 2033.
FOR AI CHIP SUPPLIERS Astera’s filings show a buyer holding warrants that vest on its own payments, which the annual report accounts for as consideration payable to a customer.
FOR READERS FOLLOWING MARGINS The annual report says the charge reduces reported gross profit and gross margin in the periods the related revenue is recognised.
The framework describes the Big Four’s 2026 capex as “the largest single-year concentrated infrastructure cycle in the history of technology”.
As we read it, Astera’s filings show one way a supplier sits inside that concentration: a customer holds warrants that vest as it and its affiliates pay, and their value is booked against Astera’s revenue. The framework was published in May 2026 and does not discuss Astera Labs or its warrants.
This piece is based on Astera Labs’ third-quarter earnings release (Exhibit 99.1 to its 8-K of 3 November 2026), its 10-Qs for the first and second quarters of 2026 and the third quarter of 2025, its 2025 annual report on Form 10-K and its SEC XBRL data. The quarterly charges for the fourth quarter of 2025 and the third quarter of 2026, the added-back margins, the multiples and the customer share total are our arithmetic, not company statements.
The filings we read do not say how much Astera sold to Amazon, which end customer accounted for more than 70% of 2025 revenue, or the payment tranches that trigger vesting. We did not read the call transcript and did not contact Astera Labs or Amazon.
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Astera Labs recorded about $18.1 million of warrants contra revenue in the third quarter, by our arithmetic, about 9.6 times a year earlier. The warrants are held by an Amazon entity and vest on tranches of payments by that entity and its affiliates; the charge took about 0.8 of a point off gross margin in the quarter, by our arithmetic.
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A note on sourcing. All company figures come from Astera Labs’ SEC filings: its third-quarter 2026 earnings release, its 10-Qs and its 2025 annual report, read on EDGAR on 4 November 2026. The quarterly charges for the fourth quarter of 2025 and the third quarter of 2026, the added-back margins, multiples and the customer share total are our arithmetic.
Gennaro Cuofano is a CRO and tech executive who has worked in AI since late 2015, starting with bringing NLP, natural-language generation, voice and chatbot products to the marketing industry. His background is in law and finance: he holds a Master's degree in Law and an International MBA with an emphasis on corporate finance (LUISS Business School and the University of San Diego, 2012), and worked as a financial analyst at a real-estate investment firm in San Diego and as an assistant controller. His work focuses on business model strategy, business engineering and, more broadly, structural analysis: how companies make money, read from their own filings. He created FourWeekMBA and leads research there and at The Business Engineer, his newsletter on AI and business strategy, with over 95,000 subscribers and more than 1,000 published analyses. His writing has also appeared on Entrepreneur (for example, How to Digitize a Family Business in Europe) and HackerNoon. Find him on LinkedIn and Substack. See how we source.
