Announcement PDF FORM 603 REVIEW DRAFT — IPD Page 1 FORM 603 — NOTICE OF INITIAL SUBSTANTIAL HOLDER ImpediMed Limited (ASX: IPD) | ACN 089 705 144 1. Details of substantial holder Proposed group: Stephen Edward Mahnken; Dior Leone Mahnken; Stephen Edward Mahnken and Dior Leone Mahnken as trustees for the Three Fish Trust; Sunlora Pty Limited (ACN 067 298 006) as trustee for the Three Fish Superannuation Fund; and MBA Investments Pty Ltd (ACN 152 926 531). Date became a substantial holder: 25 September 2026 (based on the holdings and dates supplied). 2. Details of voting power Class Number of securities Person’s votes Voting power Fully paid ordinary shares 189,381,435 189,381,435 5.1708% (about 5.17%) Percentage uses 3,662,493,691 ordinary shares on issue as reported following the 3 July 2026 issue. Confirm that this was the voting share count on 25 September 2026. Each fully paid ordinary share is assumed to carry one vote. 3. Details of relevant interests See Annexure A. The named registered holders hold the parcels set out there and have direct relevant interests. Stephen Mahnken directs voting and sale of Sunlora and MBA parcels. Stephen and Dior are joint trustees of Three Fish Trust, while Stephen makes the investment decisions and places orders. As a joint trustee, Dior retains legal powers over the trust parcels despite not participating in routine investment decisions. Confirm the precise statutory characterisation before lodgement. 4. Details of present registered holders See Annexure A. The Bell Potter and issuer sponsored parcels are registered S E & D L Mahnken ATF Three Fish Trust, as supplied. Verify the exact registered names on the other holding statements. Broker names and HINs are reconciliation details and are deliberately omitted from the public notice. 5. Consideration See Annexure B for purchases from 25 May to 25 September 2026 inclusive. Cash prices are calculated from the unit prices provided. Estimated brokerage at 50 bps is shown separately for broker purchases at 0.4, 0.5 and 0.6 cents; verify contract note amounts and any other benefit. FORM 603 REVIEW DRAFT — IPD Page 2 FORM 603 — CONTINUED ImpediMed Limited | ACN 089 705 144 | Review draft 6. Associates Stephen Mahnken directs voting and sale of shares held by MBA Investments Pty Ltd and Sunlora Pty Limited. Stephen and Dior Mahnken are joint trustees of Three Fish Trust. Stephen handles the trust’s investment activity and places orders; Dior does not take part in routine decisions or place orders, but remains a joint trustee. The combined voting power is presented on the basis of Stephen’s stated influence over each parcel and the trustees’ legal interests. Confirm any limits under the trust deed or mandates before signing. A 2023 IPD association notice involving a wider shareholder group was followed by a notice that the association ceased on 28 September 2023. This draft does not include that former wider group. 7. Addresses Stephen Edward Mahnken; Dior Leone Mahnken; trustees of Three Fish Trust; Sunlora Pty Limited; MBA Investments Pty Ltd 240A Woolooware Road, Burraneer NSW 2230 Signature Print name: Capacity: Signature: Date: / / 2026 The signatory and capacity must be confirmed for the final notice. Review items before lodgement Confirm the legal basis for combining all parcels, the 25 September issued voting share count, exact registered names on the remaining statements, and contract note cash and brokerage. If the 5% holding was known on 25 September, obtain prompt professional advice on lodging timing. Source notes: ASIC Form 603 (February 2025 PDF); ImpediMed/ASX historical Form 603 and Form 605 (2023); user-supplied share register and transactions. This is a working completion of the form’s sections, not a signed statutory notice. Person / entity Address (as supplied for this notice) Stephen mahnken Trustee/director 30 Sep FORM 603 REVIEW DRAFT — IPD Page 3 ANNEXURE A — HOLDINGS ImpediMed Limited | ACN 089 705 144 | Proposed Form 603 dated 25 September 2026 This is Annexure A of one page referred to in Form 603 Notice of Initial Substantial Holder. Sign and date this annexure with the final notice. Holder of relevant interest / proposed registered holder Account channel (verify) Ordinary shares SUNLORA PTY LIMITED (ACN 067 298 006) ATF THREE FISH SUPERANNUATION FUND NABTRADE 50,000,000 STEPHEN EDWARD MAHNKEN NABTRADE 39,571,428 STEPHEN EDWARD MAHNKEN AND DIOR LEONE MAHNKEN ATF THREE FISH TRUST NABTRADE 29,000,000 S E & D L MAHNKEN ATF THREE FISH TRUST ISSUER SPONSORED 3,095,722 S E & D L MAHNKEN ATF THREE FISH TRUST BELL POTTER 50,000,000 MBA INVESTMENTS PTY LTD (ACN 152 926 531) CANACCORD 17,714,285 TOTAL 189,381,435 The person entitled to be registered as holder is provisionally the same named trustee/company/person in each row. Verify whether Bell Potter or a nominee is the actual registered holder. HIN/SRN information is omitted because this notice becomes public. For the trust, 29,000,000 + 3,095,722 + 50,000,000 = 82,095,722 ordinary shares. The other parcels are Sunlora 50,000,000; Stephen 39,571,428; MBA 17,714,285. Count each underlying share once even if more than one person has a relevant interest. Annexure A signature: Date: / / 2026 30 Sep FORM 603 REVIEW DRAFT — IPD Page 4 ANNEXURE B — CONSIDERATION ImpediMed Limited | ACN 089 705 144 | Proposed Form 603 dated 25 September 2026 This is Annexure B of one page referred to in Form 603 Notice of Initial Substantial Holder. Sign and date this annexure with the final notice. Acquiring holder Date Ordinary shares Unit price Share price cash / broker fee est. SUNLORA 11 JUN 2026 1,145,529 $0.006 $6,873.17 + $34.37 est. SUNLORA 12 JUN 2026 2,354,471 $0.006 $14,126.83 + $70.63 est. SUNLORA 15 JUN 2026 9,285,714 $0.007 $65,000.00 SUNLORA 23 JUL 2026 1,714,286 $0.005 $8,571.43 + $42.86 est. SUNLORA 27 JUL 2026 7,000,000 $0.004 $28,000.00 + $140.00 est. SUNLORA 21 SEP 2026 5,000,000 $0.005 $25,000.00 + $125.00 est. SUNLORA 25 SEP 2026 10,000,000 $0.005 $50,000.00 + $250.00 est. STEPHEN MAHNKEN 15 JUN 2026 13,571,428 $0.007 $95,000.00 STEPHEN MAHNKEN 21 SEP 2026 5,000,000 $0.005 $25,000.00 + $125.00 est. THREE FISH TRUST 11 JUN 2026 37,840,472 $0.010 $378,404.72 MBA INVESTMENTS 15 JUN 2026 10,714,285 $0.007 $75,000.00 TOTAL 103,626,185 $770,976.15 + $787.86 est. Estimated brokerage is shown separately from the price paid for shares. The estimate uses 0.5% of each applicable purchase value, rounded per transaction. Replace the amounts with contract note figures where they differ, and disclose any other benefit. Purchases before 25 May 2026 are outside this four month schedule. The Three Fish Trust’s 5 May 2026 purchase of 12,159,528 shares is therefore reflected in Annexure A but not this annexure. Annexure B signature: Date: / / 2026 09