# Microsoft signs long-term purchase agreement for Sublime Cement

Microsoft signed a binding long-term purchase agreement with Sublime Systems to buy up to 622,500 metric tons of low-carbon Sublime Cement over six to nine years, with deliveries from Sublime's Holyoke plant and subsequent full-scale factory.

- Type: Contract
- Announced: 2025-05-22
- Where: Holyoke, Massachusetts, United States
- Status: announced
- Capacity: 622,500 metric tons (total over contract period)
- Products: low-carbon cement (Sublime Cement)
- Sectors: [Construction Materials](https://endata.com/sectors/construction-materials.md)

## Companies

- [Microsoft](https://endata.com/companies/11213.md) (customer)
- [Sublime Systems](https://endata.com/companies/76508.md) (supplier)

## Sources

- [azollaventures.com](https://azollaventures.com/sublime-systems-and-microsoft-sign-binding-long-term-purchase-transforming-the-market-for-clean-cement/), 2025-05-22: "Microsoft is contracting with Sublime Systems to verifiably reduce construction emissions through a binding purchase of low-carbon cement manufactured with Sublime’s breakthrough American-invented technology."

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Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.