Andre Krupnick

Joel Jackson

Steve Byrne

Katie Lachapelle

MacMurray Whale

Mac Whale

Robert Hoffman

Rock Hoffman Blasko

Shannon Gill

- **Sigma Lithium** was **added to the Morgan Stanley National Security Stock Index** (Bloomberg: MSXXNSEC) on **October 16, 2025**.  **[1848309_0001171843-25-006510_exh_991.htm:0]** 
- The Morgan Stanley National Security Index tracks publicly listed companies whose operations, products, or technologies contribute to **national security, supply chain resilience, and strategic infrastructure**, including those in **battery materials**.  **[1848309_0001171843-25-006510_exh_991.htm:0]** 
- The company currently produces **270,000 tonnes of lithium oxide concentrate** on an annualized basis (approximately **38,000–40,000 tonnes of LCE**).  **[1848309_0001171843-25-006510_exh_991.htm:0]** 
- Sigma Lithium is constructing a second plant to **double its production capacity** to **520,000 tonnes of lithium oxide concentrate** (approximately **77,000–80,000 tonnes of LCE**).  **[1848309_0001171843-25-006510_exh_991.htm:0]**

Sigma Lithium Added to Morgan Stanley National Security Index

- **Sigma Lithium** was recognized for **sustainability excellence** by Instituto Itausa and Instituto Arapyau, being cited as a "global reference in green lithium" for its "Quintuple Zero" formula and ESG practices.  **[1848309_0001171843-25-006286_exh_991.htm:0]** 
- The company is **upgrading its mining operations** to increase efficiency and competitiveness, aiming to **decrease overall plant gate costs by approximately 20%** and increase production at its Greentech industrial plant.  **[1848309_0001171843-25-006286_exh_991.htm:0]** 
- This upgrade, which commenced in **Q3 2025** in response to declining lithium prices, involves replacing mining equipment and changing suppliers, and is also intended to prepare the mine for a planned capacity expansion in **2026**.  **[1848309_0001171843-25-006286_exh_991.htm:1]** 
- The industrial Greentech plant has achieved an excellent safety record, with **more than 2 years (735 days) without Lost Time Injury (LTI) and zero fatalities** as of the end of Q2 2025.  **[1848309_0001171843-25-006286_exh_991.htm:1]**

Sigma Lithium Receives Sustainability Recognition and Initiates Operational Upgrades

- **Sigma Lithium** was recognized for **sustainability excellence** as a "global reference in green lithium" for its "Quintuple Zero" formula (no dams, chemicals, carbon emissions, fossil energy, water consumption) in the "Climate and Nature Solutions in Brazil" report.  **[1848309_20251006DE90831:0]** 
- The company is **upgrading its mining operations**, which commenced in **Q3 2025**, to increase efficiency and competitiveness.  **[1848309_20251006DE90831:0]**  This upgrade is expected to **decrease overall plant gate costs by approximately 20%** and increase production at the Greentech industrial plant.  **[1848309_20251006DE90831:0]** 
- By the end of **Q2 2025**, Sigma Lithium's industrial Greentech plant accumulated **more than 2 years (735 days) without Lost Time Injury (LTI) and zero fatalities**.  **[1848309_20251006DE90831:0]** 
- Sigma Lithium currently produces **270,000 tonnes of lithium oxide concentrate** annually and is constructing a second plant to **double production capacity to 520,000 tonnes**.  **[1848309_20251006DE90831:2]**

Sigma Lithium Announces Operational Upgrades and Sustainability Recognition

- Sigma Lithium Corporation is scheduled to release its **third quarter 2025 earnings results** on **Friday, November 14, 2025**, before market open.  **[1848309_0001171843-25-006241_exh_991.htm:0]** 
- A conference call to discuss these results will take place on the same day, **November 14, 2025, at 8:30 a.m. EST**.  **[1848309_0001171843-25-006241_exh_991.htm:0]** 
- The company currently produces **270,000 tonnes of lithium oxide concentrate** annually and is constructing a second plant to **double production capacity to 520,000 tonnes**.  **[1848309_0001171843-25-006241_exh_991.htm:0]**

Sigma Lithium (SGML)