Announcement PDF Monthly Report September 2026 Rivco Australia Limited (ASX:RIV) 1 SHARES ON ISSUE: 156,998,442 WATER ASSETS: $306 million Net Asset Value (Pre-tax) $1.74 per share (unaudited) Net Asset Value (Post-tax) $1.58 per share (unaudited) Closing Share Price $1.19 per share Southern Basin Dam Storages – 30 September 2026 Dartmouth Hume Eildon Blowering Burrinjuck Menindee Average* Current Month 77% 85% 61% 66% 66% 28% 68% Previous Month 75% 76% 59% 65% 63% 30% 64% Previous Year 72% 56% 57% 58% 68% 85% 65% MARKET CAP: $187 million * Weighted Average Key Highlights • Pre-tax NAV increased 1 cent to $1.74 per share during September, reflecting modest entitlement value uplifts. • The Company released its updated Investment Thesis during the month, highlighting growing demand against a fixed and shrinking water supply. • WSP’s modelling identified a Lower Murray deficit in four of five climate scenarios. Against fixed annual permanent crop demand in the Lower Murray of ~1,494 GL, the deficit is 137 GL in an average year (9% shortfall), increasing to a deficit of 1,054 GL in an extremely dry year (71% shortfall). Rivco has 61% of its portfolio value positioned in the Lower Murray region. • Government recovery continues to reduce supply, with 70 GL of the 450 GL recovery program remaining and a further 190–314 GL SDLAM shortfall that may require additional Government water purchases. Portfolio Snapshot This announcement has been authorised for release by the Chairman of Rivco Australia Limited (“Rivco” or “the Company”). This document contains summary informationabout Rivco, its subsidiaries and their respective activities current as at the date of this document unless otherwise stated. This document does not contain all the informationabout Rivco's assets and liabilities, financial positionand performance, profits and losses and prospects and does not purport to be complete or comprise all information whichis relevant to an investment decision or that would be required in a prospectus or product disclosure statement prepared in accordance with the requirements of the Corporations Act 2001 (Cth). This document should be read in conjunctionwith Rivco's other periodic and continuous disclosure announcements lodged with ASX which are available at www.asx.com.au. The release, publication or distribution of this document (includingan electronic copy) outside of Australia may be restricted by law. This document may contain forward looking statements, includingstatements regarding Rivco's intentions, beliefs or current expectations about its business and operations, and market conditions. Forward looking statements are provided as a general guide only and should not be relied upon as an indication orguarantee of future performance. This document does not constitute investment, tax, legal or any other form of advice or recommendation andwas prepared without regard to the specific objectives, financial situation or needsof any particular person. Before making an investment decision, you should make your own enquiries and investigations and obtain your own professional advice. Lachlan Campbell Executive Manager - Corporate lachlan.campbell@rivco.com.au +61 410 107 158 Lachlan Beech Executive Manager – Portfolio & Trading lachlan.beech@rivco.com.au +61 414 742 197 Contact Details 61.3 GL WATER ENTITLEMENTS 3.2 yrs WEIGHTED AVERAGE LEASE EXPIRY (WALE) 6.6% 2026 DIVIDEND YIELD (GROSS)1 4.6% 2026 DIVIDEND YIELD (CASH)2 1. Calculated as the cash dividends paid/declaredthroughout2026, grossed up for franking credits, divided by the EOM share price. 2. Calculated as the cash dividends paid/declaredthroughout2026, divided by the EOM share price (relevantfor non-residentinvestors). Awarded Allocation Percentages – 1 October 2026 Goulburn VIC Murray NSW Murray Murrumbidgee SA Murray High Security 57% 75% 97% 95% 100% General Security* 0% 0% 30% 45% N/A *GeneralSecurityentitlements in NSW share similar characteristicsto Low Reliabilityentitlementsin Victoria. 80% % OF PORTFOLIO LEASED 5.5 cps CASH DIVIDENDS PAID/DECLARED (2026)