· Investment Strategies · 3 sources · Updated · Verified
Temporal’s $550M Series E Is $12.55B — ARR Dollars Still Missing
Temporal announced a $550 million Series E at $12.55 billion on September 14, 2026, more than doubling the February $5 billion Series D in seven months. Lightspeed co-led with Wellington, Goldman Sachs Alternatives, and Tiger Global. The company printed usage and growth rates, not ARR dollars. Reuters $12.6 billion is rounding.
By Venture Capital Tracker Editorial
Temporal announced a $550 million Series E at $12.55 billion on September 14, 2026. That is 2.5× the February $5 billion Series D in seven months. Lightspeed co-led with Wellington Management, Growth Equity at Goldman Sachs Alternatives, and Tiger Global. The company blog is the primary. Reuters matches $12.55 billion and rounds the headline to $12.6 billion. Last verified September 15, 2026.
The number that will get copied wrong is treating $12.55 billion as a multiple of a printed ARR. There is no ARR dollar in the Series E post. Temporal printed growth rates and usage.
This is temporal.io (Seattle). It is the durable-execution company, not a time-series database.
Five-minute decision
| If you need… | Verdict |
|---|---|
| What happened | Funded. $550M Series E, Sep 14. Company: Lightspeed co-led with Wellington, GS Alternatives, Tiger. |
| Valuation | $12.55B. Reuters headline $12.6B is rounding. Feb mark was $5B. |
| vs August talks | Bloomberg Aug 18: ~$500M at ≥$12B pre-money, not closed. This is the company close. Pre/post not labeled. |
| ARR | Not disclosed. Run-rate up >200% YoY and NDR >200% since February are company growth claims. |
| Whether to diligence | Yes, if you underwrite workflow infra off usage + NDR. No, if you need a dollar ARR or the primary/secondary split. |
Investigate further when: a 2.5× mark-up in seven months on durable execution is the bet, and usage (1.9 trillion August billable actions; 4,300 paying customers) is enough to start.
Wait or pass when: you need ARR dollars, cheque sizes, or whether $12.55 billion is pre-money or post-money.
What closed
| Field | Detail |
|---|---|
| Company | Temporal (temporal.io); Seattle; founded 2019; CEO Samar Abbas; co-founder Maxim Fateev |
| Round | $550M Series E at $12.55B · Sep 14, 2026 |
| Lead / co-leads | Company: Lightspeed co-led, with Wellington, GS Alternatives Growth Equity, and Tiger Global. Reuters: Lightspeed led; the other three joined as co-leads. |
| Also in | T. Rowe Price, SV Angel. Returning: a16z, Sequoia, Index, GIC, Sapphire Ventures, Amplify |
| Prior priced stack | $300M Series D at $5B post-money, Feb 17, 2026, a16z led (company; Series D memo) |
| Customers | >4,300 paying, +139% YoY (company). Named: OpenAI, Snap, NVIDIA, JPMorgan Chase. Snap: 414 million Stories/day on Temporal. OpenAI usage 60-fold in under a year — company, via OpenAI VP of Infrastructure quote |
| Usage | 1.9 trillion billable actions in August, +350% YoY. Open-source installs 43 million, +134% since Dec 2025 |
| Headcount | 570, doubled over the prior year (company) |
| Missing | ARR dollars. Primary vs secondary. Cheque sizes. Pre vs post. Legal close date vs announcement date |
There is no Wellington, Goldman, GIC, Sapphire, Amplify, T. Rowe, or SV Angel /fund/ page. Do not invent them.
August 18 talks are superseded. Use $12.55 billion until Temporal restates it.
Growth rates are not a revenue stock
If you need a multiple, you do not have the denominator. >200% run-rate growth and >200% NDR since February can be true at many absolute sizes. Customer count +139% and August actions +350% are the usage spine. They are not ARR.
Clay’s same-month Series D has the same Wellington problem in reverse: a $7.1 billion mark with a December 2025 ARR print. Temporal has the fresh mark and no ARR print. Harvey’s Lightspeed-co-led $550 million is a different product (legal AI) on the same week’s $550 million tape — do not merge the two.
Rillet named Temporal as a customer in August, when the $12 billion figure was still talks.
Related: Temporal profile · Series D · Sep 14–15 index · Seattle map · September hub.
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