Q1 FY 2026 Operating Update

Petra Diamonds Limited

( Petra or the Company )

Q1 FY 2026 Operating Update

Vivek Gadodia and Juan Kemp, Joint Interim Chief Executive Officers of Petra Diamonds, commented:

“As mentioned in our FY 2025 Financial Results announcement on 17 October 2025, this quarter we have been focused on the continued execution of our updated business plan. Our product mix has continued to improve, especially for Cullinan Mine, as evidenced by the results of our first two tenders of FY 2026. The tenders delivered US$52 million in revenue with average prices increasing 53% over Q4 FY 2025, with product mix contributing 61%, partially offset by an 8% decrease in like-for-like prices.

Cullinan Mine faced some productivity issues in the early part of the quarter as it transitioned from a continuous operation to its new 3-shift configuration, but this has since begun to stabilise. Finsch had a steady production quarter as we continue to open up new parts of the orebody. We remain confident of delivering on our FY 2026 guidance released in August 2025.

Petra recorded 8.5 years fatality free by the end of Q1 FY 2026 representing 8.5 million fatality free shifts, with the LTIFR improving to 0.27 from 0.58 in Q4 FY 2025. Safety remains a key priority area with the key focus on reinstating a sense of stability for our employees following a time of significant internal change at the Company."

Investor presentation

The Company is pleased to announce that the Joint Interim Chief Executive Officers and the Chief Financial Officer will provide a live presentation relating to this update, and recent newsflow, via Investor Meet Company on 30 Oct 2025, 11:30 GMT.

The presentation is open to all existing and potential shareholders. Questions can be submitted pre-event via your Investor Meet Company dashboard up until 29 Oct 2025, 17:00 GMT, or at any time during the live presentation.

Investors can sign up to Investor Meet Company for free and add to meet PETRA DIAMONDS LIMITED via:

https://www.investormeetcompany.com/petra-diamonds-limited/register-investor

Highlights vs Q4 FY 2025

Operating Summary

1 All figures exclude Williamson which, having been sold during FY 2025, was classified as a discontinued operation in our FY 2025 audited results

2 Revenue reflects proceeds from the sale of rough diamonds and excludes revenue from profit share arrangements

LTIs and LTIFR

The Group reached 8.5 million fatality-free shifts during the quarter, with a significant (50%) reduction in LTI compared to Q4 FY 2025 (Q1 FY 2026: LTI: 2, LTIFR: 0.27) and (Q4 FY 2025: LTI: 4, LTIFR: 0.58).

Various interventions and initiatives have been implemented at our operations. These initiatives intend to address specific challenges at each operation to ensure the health and safety of our employees. These initiatives include:

These efforts are aimed at strengthening our safety culture and ensuring that every team member remains vigilant and empowered to work safely.

Q1 FY 2026 sales results

Diamond sales for Q1 FY 2025 were US$52 million from 469,286 carats. Average prices increased 53% over Q4 FY 2025, with product mix contributing 61%, partially offset by an 8% decrease in like-for-like prices across all product categories. Rough diamond sales results for the respective periods are shown below.

There were no tender sales in Q1 FY 2025 and therefore the tables do not include a comparison against the prior period.

  1 All figures exclude Williamson which, having been sold during FY 2025, was classified as a discontinued operation in our FY 2025 audited results

Price comparison by operation

Mine by mine average prices for the respective periods are set out in the table below:

Pricing assumptions for FY 2026 remain unchanged:

Future diamond prices are influenced by a range of factors outside of Petra’s control and so these assumptions are internal estimates only and no reliance should be placed on them. The Company’s pricing assumptions will be considered on an ongoing basis and may be updated as appropriate.

For further information please contact

Investor Relations, London

Julia Stone         Telephone: +44 (0)7495470187

Kelsey Traynor

[email protected]

Notes:

The following definitions have been used in this announcement:

ABOUT PETRA DIAMONDS

Petra Diamonds   is a leading independent diamond mining group and a supplier of gem quality rough diamonds to the international market. The Company's portfolio incorporates interests in two underground mines in   South Africa   (Cullinan Mine and Finsch).

Petra's strategy is to focus on value rather than volume production by optimising recoveries from its high-quality asset base in order to maximise their efficiency and profitability. The Group has a significant resource base which supports the potential for long-life operations.

Petra strives to conduct all operations according to the highest ethical standards and only operates in countries which are members of the Kimberley Process. The Company aims to generate tangible value for each of its stakeholders, thereby contributing to the socio-economic development of its host countries and supporting long-term sustainable operations to the benefit of its employees, partners and communities.

Petra is quoted on the Main Market of the   London Stock Exchange   under the ticker 'PDL'. The Company's loan notes, due in 2026, are listed on EuroNext Dublin (Irish Stock Exchange). For more information, visit   www.petradiamonds.com .

Corporate and financial summary as at 30 September 2025 1

Notes:

Mine-by-mine tables:

Cullinan Mine – South Africa

Note: 1. Petra is not able to precisely measure the ROM / tailings grade split because ore from both sources is processed through the same plant; the Company therefore back-calculates the grade with reference to resource grades.

Finsch – South Africa