Announcement PDF Monthly Report August 2026 Rivco Australia Limited (ASX:RIV) 1 SHARES ON ISSUE: 158,039,525 WATER ASSETS: $305 million Net Asset Value (Pre-tax) $1.73 per share (unaudited) Net Asset Value (Post-tax) $1.57 per share (unaudited) Closing Share Price $1.30 per share Southern Basin Dam Storages – 31 August 2026 Dartmouth Hume Eildon Blowering Burrinjuck Menindee Average* Current Month 75% 76% 59% 65% 63% 30% 64% Previous Month 71% 56% 52% 55% 52% 32% 56% Previous Year 69% 52% 57% 58% 59% 79% 62% MARKET CAP: $205 million * Weighted Average Key Highlights • The Company released its half-year report and presentation on 28 August, reporting a profit before tax of $3.04 million and continued progress against its strategic priorities. • Declared a fully franked interim dividend of 1.8 cps, payable 30 October 2026, under an evolved framework that will underpin future dividends. • Pre-tax NAV decreased by 4 cents to $1.73 per share, with entitlement values throughout the Southern Basin softening during the month. • Continued strong winter rainfall lifted Southern Basin weighted-average dam storages to 64% at 31 August 2026, up from 56% at 31 July 2026. • Improved water availability typically places downward pressure on spot prices, reinforcing the value of having 80% of the portfolio leased, while supporting higher general security allocations and providing more volume to sell into the spot market. 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 3.3 yrs WEIGHTED AVERAGE LEASE EXPIRY (WALE) 6.1% 2026 DIVIDEND YIELD (GROSS)1 4.2% 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 September 2026 Goulburn VIC Murray NSW Murray Murrumbidgee SA Murray High Security 47% 57% 97% 95% 100% General Security* 0% 0% 18% 34% N/A *GeneralSecurityentitlements in NSW share similar characteristicsto Low Reliabilityentitlementsin Victoria. 80% % OF PORTFOLIO LEASED 5.5 cps CASH DIVIDENDS PAID/DECLARED (2026)