Micron Deals Run to 2030 as AWS and Lumentum Near Sellouts

Micron said on its 30 September 2026 earnings call that its 26 strategic customer agreements cover both DRAM and NAND through 2030. Lumentum’s chief executive told Bloomberg Television on 9 October that the optics maker is “almost sold out for 2029.” And Amazon chief executive Andy Jassy said of AWS computing capacity, Reuters reported on 23 October: “2027 is largely sold out.”

This piece sets out, from our October reporting, how far ahead each supplier of AI’s parts says it is booked. The companies use different measures, from contract terms to a share of output, so we rank the years they name and do not add them up.

This Week In The AI Supercycle · video

The Business Engineer’s explainer for this week’s issue, 18 to 24 October 2026: the companies selling AI’s parts say they are booked for years, while the companies paying for the build found money dearer.

Business Pill · TAKE-OR-PAY

A short explainer of take-or-pay: paying for supply whether or not you use it. It teaches the general idea only and says nothing about Micron, AWS or Lumentum.

Who Is Booked, and to When

The rows below give the furthest year each company names for supply it has sold or contracted, in the company’s own words, with the measure it uses.

Sources: Micron and Sandisk earnings calls, as reported in our memory piece; Lumentum’s chief executive on Bloomberg Television, as reported in our optics piece; Reuters, as reported in our AWS capacity piece. The measures differ and are ranked, not summed.

What Was Posted on X

Investor Shay Boloor pairs Andy Jassy’s “a good chunk of ’28 is sold out” with what he says SpaceX and Nebius have reported this month, and asks where the 2028 compute glut bears expect is supposed to come from. The SpaceX and Nebius characterisations are his.

Techmeme flags a Wall Street Journal interview with Ciena chief executive Gary Smith, a veteran of the 2001 telecoms crash, on AI demand outpacing supply for Ciena’s optical networking chips. The WSJ interview itself was not read here.

Wall St Engine quotes Jensen Huang at Nvidia GTC saying “scale up is going to become optical” and that the optics needed in future will be “several orders of magnitude more”; the post also attributes a 15x rise in optical volume to Huang, a figure that is not in the quoted remarks.

The Transcript quotes Andy Jassy on the a16z podcast: Amazon expects about $220B of capex in 2026, and “even spending $220B in CapEx this year, we’re leaving a meaningful amount of demand on the table”.

Memory: Contracts Running to 2030

Micron now has 26 strategic customer agreements, 10 of them signed since its previous call, it said on 30 September. Asked about the share they cover, president Manish Bhatia said: “I can tell you that the DRAM volume is a little bit less than that, approximately 35%, and the NAND bit volume is a little bit more.” Our memory piece notes the 35% is a share of bit volume, not of revenue.

Micron’s annual report puts its remaining performance obligations, sales contracted but not yet delivered, at approximately $134 billion as of 3 September 2026. The same report says that as of 28 August 2025 they “were not material”.

At Sandisk, chief financial officer Luis Visoso said on 5 August: “We expect our NBMs to represent more than 50% of our bits in fiscal year 2027 and approximately 2/3 of our bits in fiscal year 2028”, with “a weighted average duration of over four years”. NBMs are Sandisk’s long-term agreements. Together, Micron and Sandisk report about $225 billion of memory sales under contract, by our arithmetic from their filings and calls.

Optics and Cloud: Nearly Sold Out

Lumentum chief executive Michael Hurlston told Bloomberg Television that it is under-shipping demand on some of its products by 30% into 2028 and on others by about 70% next year. “We’re almost sold out for 2029,” he said, as our optics piece reported.

For cloud capacity, Reuters quoted Jassy: “2027 is largely sold out. We always leave a certain amount for on demand and our inference service bedrock, or EC2, but largely sold out all the big chunks. A good chunk of 2028 is sold out.” Our AWS capacity piece set that remark against the week’s financing news. Amazon reports third-quarter results on 29 October, according to Reuters.

Below the Chips: Orders, Lines and Tools

At ABB, orders ran ahead of revenue. It reported third-quarter orders of $12,055 million, up 40%, against revenues of $9,701 million, up 14%, “yielding a book-to-bill of 1.24,” it said on 20 October, as our ABB piece reported.

A new cross-linked polyethylene (XLPE) cable line takes around three years to build, Reuters reported on 22 October, as Nexans chief financial officer Vincent Piquet said cable capacity is emerging as a bottleneck for AI data-centre construction. “Things can’t move quickly and the people building these data centres are in a great hurry,” he said, according to our cable piece.

Lam Research, which makes chipmaking equipment, reported record revenue of $8.22 billion for the September quarter, up 54% by our arithmetic from $5.32 billion a year earlier, and guided to $8.60 billion, our Lam piece reported.

Connecting the Coverage

The buyers are signing for years too. Meta’s 10-Q, filed on 22 October, lists $454.52 billion of non-cancelable contractual commitments at 30 September, about $121.41 billion of them due in 2027, as our AWS capacity piece reported.

The money moved the other way that week. SpaceX’s $40 billion off-balance-sheet chip debt was “roiled by recent market turmoil,” Bloomberg reported on 23 October, covered in our SpaceX debt piece. The same day SK hynix said in a filing that Solidigm had stopped its listing review: “After comprehensively considering factors such as capital market conditions, the company has decided to discontinue its review of a potential pre-IPO and initial public offering,” our Solidigm piece reported.

This week’s Business Engineer issue, This Week In The AI Supercycle, puts the split this way: “the build isn’t short on demand for its parts. It is short of cheap money, and its end revenue rests on a narrow base of large, often venture-funded buyers.”

The Structural Read

As we read it, the measures differ in kind: Micron and Sandisk describe signed agreements and a share of bits, while Lumentum and AWS describe how sold out they are in an executive’s words.

As we read it, the dates sit years beyond the week’s financing news: a $40 billion chip debt deal was roiled and a listing review stopped on 23 October, per Bloomberg and an SK hynix filing.

As we read it, the buyers’ side shows the same horizon: Meta’s 10-Q lists $454.52 billion of non-cancelable commitments, about $121.41 billion of them due in 2027.

Three Implications

FOR BUYERS OF AI HARDWARE Micron says its agreements run through 2030 and Sandisk says its long-term deals carry a weighted average duration of over four years.

FOR CLOUD CUSTOMERS Jassy says AWS leaves a certain amount for on demand and its inference service, with 2027 largely sold out, Reuters reported.

FOR THE BUILD BELOW THE CHIPS Nexans’s chief financial officer says a new XLPE cable line takes around three years to build, and ABB reports a book-to-bill of 1.24.

The Business Engineer Lens

This story maps onto the Business Engineer framework The AI Memory Chokepoint.

The framework puts it as “Memory is becoming the new compute. HBM growth is outpacing accelerator demand, making memory the rate-limiting factor in the AI scaling equation.”

As we read it, the 2030 end date on Micron’s agreements is that claim written into contracts. The framework was published in December 2025 and does not discuss these agreements.

What Is Not Established

The sources do not give a single measure of how much AI supply is sold ahead. Micron describes agreements and a share of bit volume, Lumentum and Jassy describe how sold out they are in their own words, and Sandisk gives a share of its bits. None of them names the customers behind each contract, and the remarks do not say whether the contracts could be renegotiated if demand changed.

The Bottom Line

The suppliers of AI’s parts named years from 2028 to 2030 for supply already sold or contracted. Micron’s agreements run through 2030, Lumentum is almost sold out for 2029, AWS has a good chunk of 2028 sold, and Sandisk expects about two thirds of its fiscal 2028 bits to come under long-term deals. In the same week, a $40 billion chip debt deal was roiled and a listing review was stopped.