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The Musk Stack Ledger
Our 7-part series mapped how Tesla, xAI, and SpaceX function as one integrated system. This ledger keeps the receipts current as each layer moves: what shipped, what got funded, what's still a claim versus a confirmed fact.
Entries
7
Confirmed
4
Updated
Oct 1, 2026
Latest Entry
SpaceX IPO
SpaceX (SPCX) debuted at a $1.77 trillion valuation, the largest IPO in history, driven primarily by Starlink. Musk holds 82.4% of voting power on 42% equity. xAI became a wholly owned subsidiary with orbital data centers planned for 2028.
| Date | Development | Detail | Amount | Status | Source |
|---|---|---|---|---|---|
| Jun 12, 2026 | SpaceX IPO | SpaceX (SPCX) debuted at a $1.77 trillion valuation, the largest IPO in history, driven primarily by Starlink. Musk holds 82.4% of voting power on 42% equity. xAI became a wholly owned subsidiary with orbital data centers planned for 2028. | $1.77T valuation | Confirmed - public | Nexairi: The SpaceX IPO (Part 7) |
| May 28, 2026 | Mars integration thesis | TERAFAB chips, Optimus robots, Colossus training, and Starship launch are argued to function as one interdependent system aimed at a Mars destination rather than five separate bets. | Analysis - thesis, not a dated event | Nexairi: Mars Integration (Part 6) | |
| May 21, 2026 | Grid power constraint | AI data centers, Optimus production, and launch facilities are drawing more electricity than several state grids can comfortably supply, identified as the structural bottleneck for the whole stack. | Open risk - unresolved | Nexairi: The Power Problem (Part 5) | |
| May 14, 2026 | Starship V3 Mars logistics test | Reusable heavy launch, orbital refueling, and cargo cadence tests that form the delivery layer underneath the rest of the stack. | Confirmed - testing underway | Nexairi: Starship V3 (Part 4) | |
| May 7, 2026 | xAI Colossus supercomputer | A 555,000-GPU supercomputer in Memphis drawing roughly 2 gigawatts of power, the training site for the models that run in Optimus and future frontier releases. | 2GW draw | Confirmed - live | Nexairi: xAI Colossus (Part 3) |
| Apr 30, 2026 | Optimus and FSD roadmap | Tesla's roadmap targets mass-production Optimus robots at roughly $20,000, built around the inference chips coming out of TERAFAB. | $20,000 target unit cost | Roadmap - not yet shipping at target price | Nexairi: Optimus and FSD (Part 2) |
| Apr 23, 2026 | TERAFAB chip factory | A joint Tesla/SpaceX/xAI chip factory in Austin, built on Intel's 14A process, designed to cut the cost of Optimus robot and FSD inference chips at a scale aimed at competing with Nvidia. | Confirmed - under construction | Nexairi: TERAFAB (Part 1) |
Every row links to its source. If a status looks wrong or you have a correction with a source attached, tell us — this ledger is only useful if it stays accurate.
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