Prometheus Materials

CARBON NEGATIVE CEMENT & CONCRETE

We provide sustainable building materials that accelerate the world’s transition to a carbon negative future.

[Prometheus Materials @prometheusmats]

Another successful ProZERO™ pour completed yesterday on a major data center project!
We’re proud to see our low-carbon blended-cement performing beautifully in the field - delivering high-quality, durable concrete while significantly reducing the carbon footprint of this critical infrastructure project.
Huge thanks to the entire crew and our partners for the excellent execution. Many of our Prometheus Materials team members were on-site for the pour. Moments like these remind us why we do what we do.
Real progress, real projects, real results.
#LowCarbonConcrete #ProZERO #DataCenter #SustainableConstruction #CarbonNegative

[Prometheus Materials @prometheusmats]

ProZERO™ is efficient down to the molecule - and there’s a member of our team uniquely equipped for that level of molecular analysis and the rigor required to get there: John R. Hottle, Ph.D.

John’s commitment to excellence and creativity in driving thoughtful new possibilities make him the perfect person to lead the team and drive innovation in his new role as Director of Technology.

Congratulations on the promotion, John.

Over the past three years, John has played a key role in advancing the science and development behind ProZERO™, including interfacing with ASTM to help ensure our product is not only sustainable, but also compliant. In his expanded role, he’ll continue to lead the charge as we improve the sustainability and performance of our carbon-reducing technologies.

[Prometheus Materials @prometheusmats]

Announcing our new strategic partnership with Green Stream Algae

Green Stream Algae has become a strategic partner and investor in Prometheus Materials, aligning our missions and marking a major milestone in enabling the delivery of low-carbon and carbon-negative cement at commercial scale.

Through this 10+ year partnership, Green Stream Algae will serve as the exclusive supplier of microalgae and biomineral to Prometheus Materials across North and South America.

What this means for Prometheus Materials:
We’ve secured long-term supply certainty for microalgae and biomineral, two core inputs to our carbon negative, ProZERO™ technology.

What this means for the industry:
The growing demand for low-carbon and carbon-negative cement can be confidently scaled toward more sustainable construction (without disrupting existing operations or supply chains).

https://t.co/2WTUBrFvtn

https://t.co/izwSZN9C7Y

[Prometheus Materials @prometheusmats]

🚛 16 tons of ProZERO™ shipped today - heading to the East Coast!

This latest shipment will support another major project to achieve low carbon concrete with no changes to operations. Because of our concentrated carbon reducer ProZERO™️, this project is going to meet their carbon reduction goals.

[Prometheus Materials @prometheusmats]

This might spark debate. It does at ASTM.... Why not just use more fly ash?
It works - but it has limits.
1. Supply varies
2. Higher replacement levels
3. Finishability can suffer
ProZERO™ is a concentrated solution → Keep the cement. Lose the carbon.

[Prometheus Materials @prometheusmats]

How much ProZERO™ goes into a mix?

Most ready-mix producers use 10–40% replacement, based on carbon reduction targets.

We work directly with suppliers to determine the right level.
Practical.
Measurable.
Field-ready.

[Prometheus Materials @prometheusmats]

We’ve officially become a sales organization.

Over the past year, we’ve proven that low- and carbon-negative concrete can actually work in the real world — across multiple pours, partners, and applications.

Now, demand is catching up.

To meet it, we’ve brought on two new team members to help scale how we go to market:
Welcome to the team 👇

– David Mesko (Colorado & Wyoming): 25+ years in concrete and commercial construction, with deep experience in ready-mix and precast, managing multimillion-dollar accounts and closing complex, high-value deals.

– David Hermida (Arizona, New Mexico & West Texas): 10+ years in bulk cement sales, including supplying the largest wind farm in the Western Hemisphere and managing 400,000+ tons annually.

We’re excited to deliver reduction in GWP by implementing our concentrated carbon reducer, ProZERO™️, into more mix designs.

[Prometheus Materials @prometheusmats]

Most low-carbon strategies require replacing a lot of cement. ProZERO™ doesn’t.
Even at low replacement levels: ✅5% ProZERO™ can achieve similar GWP reduction to ~25% fly ash

That means:
1. Less replacement
2. Better performance
3. A more efficient way to reduce carbon.

[Prometheus Materials @prometheusmats]

One of the biggest risks with low-carbon concrete? Finishability.

If it doesn’t finish right → the job fails.

ProZERO™️is designed to behave like conventional mixes, and ProZERO™️finishability is superior to Type 1L. That’s why crews trust it in real pours.

[Prometheus Materials @prometheusmats]

Kicking off our FAQ series....

One of the biggest concerns we hear: Will this disrupt our operation? 🚫No.

ProZERO™️integrates like other cement replacements (slag, fly ash, etc.) and works within existing batching and handling systems.

No new process.
No new equipment.
Just lower carbon concrete.

[Prometheus Materials @prometheusmats]

𝗡𝗢𝗧𝗘: 𝗔𝗦𝗧𝗠'𝘀 𝗖𝗼𝗺𝗺𝗶𝘁𝘁𝗲𝗲 𝗖𝟬𝟭 𝗼𝗻 𝗖𝗲𝗺𝗲𝗻𝘁-𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗗𝗶𝘀𝗰𝘂𝘀𝘀𝗶𝗼𝗻𝘀 𝗵𝗮𝘀 𝗰𝗵𝗮𝗻𝗴𝗲𝗱 𝘃����𝗻𝘂𝗲𝘀! 𝗝𝗼𝗵𝗻 𝘄𝗶𝗹𝗹 𝗻𝗼𝘄 𝗯𝗲 𝗽𝗿𝗲𝘀𝗲𝗻𝘁𝗶𝗻𝗴 𝗶𝗻 𝗥𝗼𝗼𝗺 𝟯𝟬𝟱, 𝗪𝗲𝗱𝗻𝗲𝘀𝗱𝗮𝘆 𝗮𝘁 𝗡𝗼𝗼𝗻.
_____

𝗣𝗿𝗼𝗺𝗲𝘁𝗵𝗲𝘂𝘀 𝗠𝗮𝘁𝗲𝗿𝗶𝗮𝗹𝘀 𝗮𝘁 𝗔𝗦𝗧𝗠 𝗖𝗼𝗺𝗺𝗶𝘁𝘁𝗲𝗲 𝗪𝗲𝗲𝗸

We’re proud to announce that our John Hottle, PhD – Director of R&D at Prometheus Materials – will present at next week’s ASTM Committee Week in Atlanta, Georgia. This important gathering brings together industry experts, standards-makers and innovators from around the world to shape the future of construction materials and standards.

During Wednesday's Committee C01 on Cement-Research Discussions (Grand Ballroom A at Noon), John will be discussing our carbon negative ProZERO® cement replacement blend, its properties and performance – as reported by large-scale producers and manufacturers – and will share results from use cases with data center hyperscalers at multiple campuses across the U.S.

By spotlighting ProZERO® and its robust track record, Prometheus Materials is leading the effort to define and standardize low-carbon and sustainable cementitious materials.

Learn more about ASTM Committee Week: https://t.co/np9j9WGaKi

#SustainableConstruction #NetZeroCement #ProZERO #ASTM #C01 #ConcreteInnovation #GreenBuilding #PrometheusMaterials

[Prometheus Materials @prometheusmats]

𝗣𝗿𝗼𝗺𝗲𝘁𝗵𝗲𝘂𝘀 𝗠𝗮𝘁𝗲𝗿𝗶𝗮𝗹𝘀 𝗮𝘁 𝗔𝗦𝗧𝗠 𝗖𝗼𝗺𝗺𝗶𝘁𝘁𝗲𝗲 𝗪𝗲𝗲𝗸

We’re proud to announce that our John Hottle, PhD – Director of R&D at Prometheus Materials – will present at next week’s ASTM Committee Week in Atlanta, Georgia. This important gathering brings together industry experts, standards-makers and innovators from around the world to shape the future of construction materials and standards.

During Wednesday's Committee C01 on Cement-Research Discussions (Grand Ballroom A at Noon), John will be discussing our carbon negative ProZERO® cement replacement blend, its properties and performance – as reported by large-scale producers and manufacturers – and will share results from use cases with data center hyperscalers at multiple campuses across the U.S.

By spotlighting ProZERO® and its robust track record, Prometheus Materials is leading the effort to define and standardize low-carbon and sustainable cementitious materials.

Learn more about ASTM Committee Week: https://t.co/np9j9WGaKi

#SustainableConstruction #NetZeroCement #ProZERO #ASTM #C01 #ConcreteInnovation #GreenBuilding #PrometheusMaterials

[Prometheus Materials @prometheusmats]

𝗣𝗿𝗼𝗺𝗲𝘁𝗵𝗲𝘂𝘀 𝗠𝗮𝘁𝗲𝗿𝗶𝗮𝗹𝘀 𝗮𝘁 𝗕𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝘁𝗵𝗲 𝗕𝗶𝗼-𝗕𝗮𝘀𝗲𝗱 𝗙𝘂𝘁𝘂𝗿𝗲 — 𝗖𝗼𝗽𝗲𝗻𝗵𝗮𝗴𝗲𝗻, 𝗡𝗼𝘃 𝟮𝟲 🇩🇰

We’re excited to share that our Loren Burnett – President, CEO and Co-founder of Prometheus Materials – will be exhibiting and presenting our ProZERO® carbon negative cement and concrete solutions at the Building the Bio-Based Future event on Wednesday, November 26 at BLOXHUB in Copenhagen.

This event brings together manufacturers, suppliers, consultants, developers, architects, engineers, contractors and municipal decision-makers – all focused on accelerating the transformation of the construction industry through bio-based and sustainable building materials.

With 100+ public and private-sector professionals gathered to discuss material innovation, real-world sustainability practices and groundbreaking construction solutions, the event is designed to spark dialogue, networking, knowledge-sharing and new collaborations.

Be sure to connect with Loren in Copenhagen to learn how ProZERO® is redefining construction – delivering performance, scalability and true climate impact.

Learn more about Building the Bio-Based Future here: https://t.co/KbqbZ2XlMv

#CarbonNegative #ZeroCarbonConcrete

[Prometheus Materials @prometheusmats]

𝗪𝗛𝗘𝗪! ... 𝗪𝗵𝗮𝘁 𝗮 𝘄𝗵𝗶𝗿𝗹𝘄𝗶𝗻𝗱 𝗼𝗳 𝘀𝘂𝗰𝗰𝗲𝘀𝘀𝗳𝘂𝗹 𝗲𝘃𝗲𝗻𝘁𝘀!

Recent weeks saw our team showcased at Chicago Build and Greenbuild in LA.

At our exhibit booths, presentations and attendee discussions, we met with HUNDREDS of valuable contacts interested in our ProZERO™ line of carbon negative cement and concrete solutions.

Leaders in architecture, engineering, construction and related industries have never been more excited about our line of supplemental blends for ready mix and manufactured products – plus licensed material solutions for existing concrete manufacturers – all in a range of options to suit any sustainability objectives and project budgets.

ProZERO™ solutions are:

  • Able to achieve carbon negativity
  • In full-scale production with global availability
  • Compliant with building standards and specifications
  • Drop-in replacements within existing manufacturing and construction processes
  • The most cost effective way to reduce carbon in construction

Investors, customers and partners – contact us TODAY to discuss opportunities!

https://t.co/mvmv30vOws

[Prometheus Materials @prometheusmats]

𝗔 𝗛𝗨𝗚𝗘 𝗦𝘂𝗰𝗰𝗲𝘀𝘀 𝗮𝗻𝗱 𝗮𝗻 𝗘𝘃𝗲𝗻 𝗕𝗶𝗴𝗴𝗲𝗿 𝗧𝗵𝗮𝗻𝗸𝘀

Thank you to everyone who joined us this week at Greenbuild for “𝘖𝘯 𝘵𝘩𝘦 𝘗𝘢𝘵𝘩 𝘵𝘰 𝘕𝘦𝘵-𝘡𝘦𝘳𝘰: 𝘛𝘩𝘦 𝘙𝘰𝘭𝘦 𝘰𝘧 𝘔𝘢𝘵𝘦𝘳𝘪𝘢𝘭𝘴 𝘢𝘯𝘥 𝘊𝘰𝘭𝘭𝘢𝘣𝘰𝘳𝘢𝘵𝘪𝘰𝘯.” We’re thrilled to share that the session was a tremendous success – with our Leo Atencio and Shannon Moffitt of Cemex presenting to an engaged audience that has reported incredibly positive feedback.

✅ Attendees took away practical, real-world strategies for using low-carbon materials – including our ProZERO™ carbon negative cement and concrete
✅ The session delivered powerful insights into how collaboration between design, procurement and construction teams is driving net-zero projects forward
✅ We had meaningful discussions, thoughtful questions and valuable knowledge shared across industry leaders and innovators
✅ We achieved all of our objectives and then some – helping advance the industry’s understanding of carbon budgeting, materials innovation and scalable sustainability solutions

We’re grateful to Cemex and all who participated in making this a memorable and impactful learning experience.

Now, let’s discuss your future as a Prometheus Materials customer, partner or investor!

https://t.co/pDcbckm6vA

#CarbonNegative #ZeroCarbonConcrete

[Prometheus Materials @prometheusmats]

𝗗𝗼𝗻’𝘁 𝗠𝗶𝘀𝘀 𝗧𝗵𝗶𝘀 𝗠𝘂𝘀𝘁-𝗦𝗲𝗲 𝗣𝗿��𝘀𝗲𝗻𝘁𝗮𝘁𝗶𝗼𝗻

If you’ll be at Greenbuild next week, be sure to catch our Leo Atencio and Shannon Moffitt of Cemex as they present "On the Path to Net-Zero: The Role of Materials and Collaboration.”

✔ Discover how today’s projects are using advanced, lower-carbon materials – like our ProZERO™ carbon negative cement and concrete
✔ Explore the role of integrated collaboration across design, procurement and construction in meeting net-zero goals and requirements
✔ Learn real-world lessons and carbon-budgeting strategies you can apply to your own builds
✔ Earn Continuing Education credit by attending

This invaluable session takes place Wednesday, November 5 from 1:00-2:00pm (US/Pacific) in South Hall H/J, Cemex Education Lab #113.

https://t.co/jMHmed8XtW

#NetZeroConstruction #Greenbuild2025 #LowCarbonMaterials #SustainableDesign

[Prometheus Materials @prometheusmats]

𝗡𝗲𝘅𝘁 𝗦𝘁𝗼𝗽 >>> 𝗚𝗿𝗲𝗲𝗻𝗯𝘂𝗶𝗹𝗱 𝟮𝟬𝟮𝟱 𝗶𝗻 𝗟𝗔!

From Chicago Build this week, we’re off to Greenbuild next week – November 4-7 at the LA Convention Center.

The Prometheus Materials team will be waiting to greet customers, partners, investors and others – at booth 223 – to discuss the latest news and updates on our ProZERO™ carbon negative cement and concrete. On Wednesday, our Leo Atencio will be joining Shannon Moffitt of Cemex to present "On the Path to Net-Zero: The Role of Materials and Collaboration” – a discussion with Continuing Education credit offered!

Our ProZERO™ line of supplemental blends for ready mix and manufactured products – plus licensed material solutions for existing concrete manufacturers – offers a range of options to suit any sustainability objectives and project budgets.

ProZERO™ solutions are:

  • Able to achieve carbon negativity
  • In full-scale production with global availability
  • Compliant with building standards and specifications
  • Drop-in replacements within existing manufacturing and construction processes
  • The most cost effective way to reduce carbon in construction

Let’s connect in LA to discuss your future as a customer, partner or investor!

https://t.co/jMHmed8XtW

#CarbonNegative #SustainableConstruction

[Prometheus Materials @prometheusmats]

::: 𝗕𝗜𝗚 𝗡𝗘𝗪𝗦 :::

Prometheus Materials has completed a landmark collaboration that brings our ProZERO™ carbon negative cement and concrete to New York’s Governors Island!

This is just ONE of MANY projects, large and small, using our ProZERO™ line – which includes supplemental blends for ready mix and manufactured products plus licensed material solutions for existing concrete manufacturers – all in a range of options to suit any sustainability objectives and project budgets.

Read the full story on Yahoo Finance and contact us TODAY to discuss investor, partner and customer opportunities: https://t.co/52t45OzmPQ

#CarbonNegative #SustainableConstruction #GovernorsIsland

[Prometheus Materials @prometheusmats]

𝗪𝗲’𝗹𝗹 𝗯𝗲 𝗮𝘁 𝗖𝗵𝗶𝗰𝗮𝗴𝗼 𝗕𝘂𝗶𝗹𝗱 – 𝘄𝗶𝘁𝗵 𝗲𝘅𝗰𝗶𝘁𝗶𝗻𝗴 𝗻𝗲𝘄𝘀 𝗮𝗻𝗱 𝘂𝗽𝗱𝗮𝘁𝗲𝘀!

Attention customers, partners, investors – we’re now less than a week away from exhibiting at Chicago Build Expo 2025!

The Prometheus Materials team will be waiting to greet YOU – at booth 1410 – to discuss the latest advances in our ProZERO™ cement and concrete.

Our ProZERO™ line of supplemental blends for ready mix and manufactured products – plus licensed material solutions for existing concrete manufacturers – offers a range of options to suit any sustainability objectives and project budgets.

ProZERO™ solutions are:

  • Able to achieve carbon negativity
  • In full-scale production with global availability
  • Compliant with building standards and specifications
  • Drop-in replacements within existing manufacturing and construction processes
  • The most cost effective way to reduce carbon in construction

Let’s connect in Chicago to discuss your future as a customer, partner or investor!

https://t.co/TSpFTMe6ez

#CarbonNegative #ChicagoBuildExpo2025