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ASX:MYG | mayfieldgroup.com.au investors@mayfieldgroup.com.au 2026 Annual General Meeting Released 20 October 2026 INVESTOR PRESENTATION
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2 Chair’s Address
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M A Y F I E L D G R O U P H O L D I N G S L T D 1. Underlying EBITDA and underlying EBITDA margin are non-IFRS measures that exclude separately disclosed items; underlying EBITDA was $18.5 million in FY2026. Reconciliation in the FY2026 results presentation; definitions in note 8 of the FY2026 financial statements. 2. Declared dividends are shown in respect of the financial year. FY2025 includes a one -off special dividend of 5.3 cents; FY2025 o rdinary dividends were 3.20 cents. $3.9m $4.8m $9.9m $12.8m FY23 FY24 FY25 FY26 1.71 3.00 3.20 4.40 5.30 Special FY23 FY24 FY25 FY26 M O M E N T U M C O N T I N U E D A C R O S S K E Y M E T R I C S I N F Y 2 6 Momentum continued with record revenue and earnings in FY26 PBTREVENUE $77.8m $85.7m $118.1m $169.0m FY23 FY24 FY25 FY26 29.5% CAGR DECLARED DIVIDENDS2 (CPS) 6.40 5.63 7.23 7.38 FY23 FY24 FY25 FY26 UNDERLYING EBITDA, & MARGIN1 BASIC EPS (CPS) $6.7m $6.9m $12.0m $18.5m8.7% 8.1% 10.1% 10.9% 0.0% 2.0% 4.0% 6.0% 8.0% 10.0% 12.0% $.0m $2.0m $4.0m $6.0m $8.0m $10.0m $12.0m $14.0m $16.0m $18.0m $20.0m FY23 FY24 FY25 FY26 3
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M A Y F I E L D G R O U P H O L D I N G S L T D The Group reports one operating segment. These platforms describe operating capability for context only and are not reportabl e segments; no segment results are presented for them. Key Industries Served: Telecommunications Defence Industrial & Commercial Data Centres Adelaide Melbourne Sydney Brisbane KalgoorliePerth Manufacturing Service Operations Renewable Energy Mining & Resources Utilities & Networks Infrastructure & Transport A diversified platform operating across three core divisions PRIMARY EARNINGS DRIVER Australian-made electrical infrastructure for the nation’s most critical operations. Design, manufacture and deliver switchboards, transportable switchrooms, kiosk substations & custom solutions for specific projects. Manufactured in SA and WA. M A N U F A C T U R I N G PROJECT BASED REVENUE Communications and network solutions for critical infrastructure, allowing customers to monitor and control sites remotely. Drawing on Mayfield's manufacturing base and customer relationships, paired with power infrastructure to provide integrated solutions for modern digital networks PRODUCT SOLUTIONS Supplies critical power components like UPS systems, batteries, and test instruments to ensure a reliable network. P R O D U C T S O L U T I O N S C R I T I C A L C O N T R O L & C O M M U N I C A T I O N S Adelaide Melbourne Sydney Brisbane KalgoorliePerth Manufacturing Service Operations Telecommunications Defence Industrial & Commercial Data Centres Renewable Energy Mining & Resources Utilities & Networks Infrastructure & Transport K E Y I N D U S T R I E S S E R V E D : A U S T R A L I A ’ S L E A D I N G P R O V I D E R O F C R I T I C A L E L E C T R I C A L I N F R A S T R U C T U R E 4
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5 CEO’s Address
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M A Y F I E L D G R O U P H O L D I N G S L T D • Manufacturing was the primary driver for revenue growth, Critical communications delivered improvements in FY26 • Revenue growth supported by 10 months’ contribution of BE Switchcraft and 3 months’ contribution of SMEC • Underlying NPAT grew 50.1%, with organic growth of 23% excluding acquisition contributions • Underlying EBITDA margin expanded 80 basis points to 10.9%, reflecting operating leverage across the enlarged group • Underlying EPS, adjusted for one-off items, rose 28.8% • Basic EPS rose 2.1%, lagging earnings growth due to the larger share count from the November 2025 raising and acquisition scrip • No drawn debt at 30 June 2026, with $21.8m cash; a substantial portion is committed post year-end to the SMEC earnout, the Nilsen payment, working capital and capex FY2026 FY2025 CHANGE Revenue $169.0m $118.1m ▲ 43.0% Underlying EBITDA1 $18.5m $12.0m ▲ 54.0% Underlying EBITDA margin1 10.9% 10.1% ▲ 80 bps Underlying NPAT1 $10.9m $7.3m ▲ 50.1% Underlying Basic EPS1 10.05c 7.80c ▲ 28.8% Statutory profit before tax $12.8m $9.9m ▲ 29.2% Statutory NPAT $8.0m $6.8m ▲ 18.9% Basic EPS 7.38c 7.23c ▲ 2.1% Operating cash flow $5.0m $9.5m ▼ 47.1% Cash at 30 June $21.8m $16.9m ▲ 29.0% Commentary F I N A N C I A L P E R F O R M A N C E FY26 Results overview 6 1. Non-IFRS measures excluding separately disclosed items; reconciled in the FY2026 results presentation and in note 8 of the FY2026 financial statements.
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M A Y F I E L D G R O U P H O L D I N G S L T D Provide an FY2027 outlook at the full-year result FY2027 priorities and revenue outlook provided with the FY2026 full-year results DELIVERED D E L I V E R Y A G A I N S T F Y 2 0 2 6 C O M M I T M E N T S Consistent operational execution COMMITMENT OUTCOME STATUS Complete the SMEC Power & Technology acquisition Completed 31 March 2026; contributing $11.9m to revenue in FY26 and performing in line with expectations DELIVERED Fund growth while preserving balance sheet strength $33.5 million raised (placement and SPP) in November 2025; no drawn borrowings and $21.8 million cash at 30 June 2026 DELIVERED Expand manufacturing capacity Old Port Road SA facility acquired January 2026 ($8.4 million) and Hope Valley WA facility added DELIVERED Continue fully franked dividends Interim 2.0 cents paid March 2026; final 2.4 cents declared 26 August 2026; 4.4 cents for FY26 DELIVERED Complete and integrate the BE Switchcraft acquisition Completed 29 August 2025; contributing $18.6m to revenue in FY26 and performing above expectations DELIVERED 7
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M A Y F I E L D G R O U P H O L D I N G S L T D 8 BE SWITCHCRAFT Big wins year with Osborne Shipyards and Mt Barker Hospital. Assisting Mayfield Industries with delivery of data centre projects. From FY27 will incorporate Nilsen’s Switchboards division at the expanded Old Port Road facility. $1.4m FY26 PROFIT AFTER TAX $18.6m REVENUE CONTRIBUTED To June 2026 SMEC POWER & TECHNOLOGY Diversifies the customer base Completed 29 August 2025 Underground mining electrical infrastructure from Perth and Kalgoorlie. The contingent consideration liability was carried at a fair value of $9.4 million at 30 June 2026 and settled on 29 July 2026 in cash and scrip. $0.6m FY26 PROFIT AFTER TAX $11.9m REVENUE CONTRIBUTED 1 April to 30 June 2026 Deepens resources exposure Completed 31 March 2026 F Y 2 0 2 6 A C Q U I S I T I O N S Two acquisitions, both performed in line with expectations
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M A Y F I E L D G R O U P H O L D I N G S L T D • Data centres (DC): 14 live tenders worth $239m for the power infrastructure behind hyperscale and colocation data centres: power skids, kiosk substations, switchrooms and MV and LV switchboards in NSW, VIC, SA and WA. $189m of this is on projects past the design stage. • Q1 revenue was ahead of expectations as a number of Mayfield Industries projects were finalised, while SMEC saw increased referrals. • When client projects proceed, Mayfield wins around two in three decided bids. Q1 FY27 commentary W O R K I N H A N D & P I P E L I N E A strong pipeline to replenish $115m of work in hand 9 Mayfield Industries tender register at 30 September 2026; excludes BE Switchcraft, SMEC and N-Series. Unweighted, unaudited tender values; not a forecast of revenue. Other sectors include process, oil and gas and other. $114.7m WORK IN HAND AT 30 SEPTEMBER 2026 New wins expected from a strong $1.4bn pipeline, with $244m on projects already awarded to our clients MAYFIELD INDUSTRIES LIVE TENDER PIPELINE AT 30 SEPTEMBER 2026, BY CLIENT PROJECT STAGE ($M) $598m $227m $327m $205m $26m $13m Design (FEED) Approved to proceed Client bidding Client awarded Tech / commercial review Negotiation $244m on projects awarded to our clients (60 tenders)
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M A Y F I E L D G R O U P H O L D I N G S L T D NEXTDC M2 DATA CENTRE NEXTDC | Victoria Design, manufacture and site supervision of low-voltage main switchboards for Stages 9 to 11 of NEXTDC’s M2 Melbourne data centre. Factory acceptance testing under way in Q1. DATA CENTRES CENTRAL WEST ORANA REZ Acciona Cobra JV | New South Wales Manufacture, testing, delivery and installation of prefabricated substation buildings for NSW’s first Renewable Energy Zone, connecting new wind, solar and storage to the grid. RENEWABLES & TRANSMISSION BRIGALOW GAS PEAKING PLANT GE Vernova for CS Energy | Queensland Prefabricated balance-of-plant switchrooms and power control modules for CS Energy’s Brigalow peaking plant, adding dispatchable capacity to Queensland’s grid. Manufactured in South Australia. POWER GENERATION ROY HILL TAILINGS SWITCHROOM HanRoy Iron Ore Projects | Western Australia Transportable switchroom for the tailings storage and distribution system at Roy Hill’s in-pit tailings facility (Delta 2) in the Pilbara. Engineered and delivered by our WA team. MINING TORRENS TO DARLINGTON (T2D) T2D Alliance | South Australia Low-voltage main switchboards, motor control centres and power factor correction for T2D, the final section of Adelaide’s North– South Corridor. Manufactured in South Australia. TRANSPORT INFRASTRUCTURE 10 Q 1 F Y 2 7 R E V E N U E D R I V E R S Major projects underpinning Q1 delivery Selected Mayfield Industries projects in delivery during Q1 FY27 (1 July to 30 September 2026). Images of NEXTDC M2 and Roy Hill are from the projects; other images are representative of Mayfield Industries work.
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M A Y F I E L D G R O U P H O L D I N G S L T D Q 1 F Y 2 7 T R A D I N G U P D A T E A N D F Y 2 7 G U I D A N C E 1. Q1 FY27 information is unaudited management information and is compared with internal budget, not consensus or guidance. FY2027 revenue guidance is a management estimate and depends on the timing and execution of project delivery and of the staged transfer of the N-Series business. Strong first quarter; FY27 revenue guidance upgraded to $226 –232 million 11 WHAT WE SAW IN Q1 • Revenue and earnings ahead of expectations, led by Mayfield Industries project delivery and stronger demand at SMEC • Gross margins ahead of plan at Mayfield Industries and SMEC • Continued order flow from WA mining customers at SMEC and new project awards across QLD, NSW and WA • Working capital improving, with cash position strengthening into Q2 $169m $226–232m FY2026 revenue FY2027 revenue guidance 34–37% Revenue growth FY27 GUIDANCE $226–232m Revenue guidance (previously $224–229 million) +34–37% Revenue growth on FY26 10–11% EBITDA margin guidance • Reflects a full-year contribution from SMEC and BE Switchcraft and ~8 months from the N-Series switchboards platform • Supported by work in hand and a growing pipeline across data centres, mining electrification and grid investment
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M A Y F I E L D G R O U P H O L D I N G S L T D S T R U C T U R A L D E M A N D Unprecedented demand across all sectors AI AND DATA CENTRES 20GW national data centre pipeline $250–375bn of estimated build capex, with electrical systems the largest single cost category at about 27%. MINING ELECTRIFICATION $61.6bn of committed major projects 432 major projects under development nationally, with over three-quarters of committed value in Western Australia. ENERGY INFRASTRUCTURE $106bn grid transformation to 2050 Renewable energy zones, utility- scale batteries and transmission upgrades all require substations, switchgear and switchrooms. DEFENCE & INFRASTRUCTURE Sovereign capability investment Utilities, transport, defence and telecommunications networks requiring Australian-made manufacturing capability. W H E R E M A Y F I E L D S I T S Every one of these projects needs the same core capability: primary power distribution, switchboards, modular switchrooms, backup power, monitoring and controls, and grid connection. That is Mayfield's core manufacturing and engineering capability today. Sources: AEMO 2026 Integrated System Plan; Department of Industry, Science and Resources, Resources and Energy Major Projects 2025; independent equity research. Third-party estimates are indicative market data, not company forecasts. 12
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M A Y F I E L D G R O U P H O L D I N G S L T D S T R A T E G I C P I L L A R S FY27 strategic initiatives 03 DRIVE DIGITISATION AND OPERATIONAL EXCELLENCE • Digitise operations end to end, creating a connected digital thread from estimating through to service • Apply LEAN principles across all operations. 04 STRENGTHEN MARKET POSITION • Grow share in utilities, renewable energy, data centres, resources and infrastructure. • Integrate and scale BE Switchcraft, SMEC and N-Series capabilities; convert cross-selling across the enlarged customer base into revenue. • Supported by cross-selling across the enlarged customer base. 01 EXPAND MANUFACTURING CAPACITY • Ramp up facilities SA & Hope Valley WA from December 2026 to meet demand. • Staged transfer of employees and assets to Royal Park by 31 October 2026; N-Series production established in SA. • Pursue East Coast expansion. 02 GROW THROUGH PRODUCT DEVELOPMENT • Develop capabilities in medium voltage switchgear, transformers, battery energy storage, kiosk substations and related energy infrastructure. 13M A Y F I E L D G R O U P H O L D I N G S L T D
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M A Y F I E L D G R O U P H O L D I N G S L T D • Adds the proven N-Series product platform to Mayfield’s offering • Supports rapid utilisation of the Old Port Road facility, acquired in January 2026 • Platform, IP, employees, customer contracts, inventory and manufacturing assets transferred, strengthening Mayfield’s skilled workforce and manufacturing capability • Expands Mayfield’s switchboard offering across key Australian growth markets • Creates a stronger platform for organic growth through people, IP and customer relationships • Expected FY2027 revenue contribution of $10 to $15 million2 Q1 FY27 progress • Staged transfer of employees and assets to Old Port Road final handover by 30 November 2026 (previously 31 October 2026) • N-Series production being established in South Australia alongside BE Switchcraft • Customer contracts novated to Mayfield 1. The Nilsen brand, significant excluded projects and certain other assets and liabilities retained by the vendor do not form part of the transaction 2. unaudited management estimate; not disclosed in the FY2026 financial statements I N T E G R A T I O N U N D E R W A Y Nilsen Switchboard division Completed the acquisition of Nilsen’s Switchboards Division on 31 July 2026 1. 14M A Y F I E L D G R O U P H O L D I N G S L T D
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M A Y F I E L D G R O U P H O L D I N G S L T D WESTERN AUSTRALIA Hope Valley, Bibra Lake & Kalgoorlie • New 20,000m² Hope Valley facility available from 1 Dec 2026. • Plus SMEC operations servicing mining customers in WA and export markets SOUTH AUSTRALIA Edinburgh & Old Port Rd • Edinburgh is home to our head office and primary manufacturing campus. • Old Port Road acquired Jan 2026 for $8.4m, adding 10,410m², the site adjoins BE Switchcraft and will be utilised by N-Series and BE Switchcraft as volumes build. QUEENSLAND Brendale Depot for all Mayfield Group Businesses NEW SOUTH WALES Lane Cove ATI Headquarters VICTORIA Broadmeadows Power Parameters Headquarters A N A T I O N A L M A N U F A C T U R I N G A N D S E R V I C E S F O O T P R I N T CAPACITY TO GROW FROM ~55,000 TO ~73,000 M² NEXT East Coast Expansion Further manufacturing expansion opportunities on the East Coast and in other growth markets to meet demand. 15 FY2027 GROWTH IS SUPPORTED WITHOUT FURTHER MAJOR CAPITAL INVESTMENT FOOTPRINT • Group manufacturing footprint increases by 18,000m2 • 10,410 m² at Old Port Road and 20,000 m² at Hope Valley • or ~32%, on the ~55,000m2 operating before these additions.
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M A Y F I E L D G R O U P H O L D I N G S L T D PURE-PLAY EXPOSURE The only ASX-listed pure-play electrical infrastructure manufacturer, supplying the physical backbone for data centres, renewable energy, mining electrification and grid modernisation. STRUCTURAL DEMAND Long-term investment in electrification, AI-driven data centre power demand, mining electrification and critical communications underpins the order book, which grew from $104 million to $135 million during FY26. DELIVERY RECORD Three acquisitions completed in twelve months on disciplined terms, $33.5 million capital raised as planned and fully franked dividends maintained throughout the growth phase. CAPACITY TO COMPOUND No drawn borrowings at 30 June 2026, complementary businesses across manufacturing, products and critical communications, new facilities in SA and WA, and cross-selling across an enlarged customer base. Why Mayfield T H E I N V E S T M E N T C A S E 16 Strong organic focus with any inorganic opportunities to be funded by existing balance sheet
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Items of business 17
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M A Y F I E L D G R O U P H O L D I N G S L T D SUMMARY INFORMATION NOT INVESTMENT ADVICE FORWARD-LOOKING STATEMENTS NON-IFRS FINANCIAL INFORMATION UNAUDITED OPERATIONAL DATA ROUNDING AND CURRENCY A U T H O R I S E D F O R R E L E A S E B Y T H E B O A R D O F M A Y F I E L D G R O U P H O L D I N G S Important information 18
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ASX:MYG | mayfieldgroup.com.au investors@mayfieldgroup.com.au 19