Filtronic plc (FTC.L) — Company Research

Filtronic plc (LSE: FTC) is a UK AIM-listed radio-frequency (RF) technology company that designs and manufactures products for the aerospace, defence, space and telecommunications infrastructure markets (per Filtronic's FY2025 final results, year ended 31 May 2025, and the yfinance company description, pulled 2026-05-26). For the fiscal year ended 31 May 2025 the Company reported revenue of £56.3 million (+121% year over year from £25.4 million), operating profit of £13.4 million (+272% from £3.6 million), adjusted EBITDA of £17.0 million (FY2024 £4.9 million) and profit for the year of £14.0 million (per Filtronic's FY2025 final results). Net income was £14.0 million and diluted EPS was 6.05 pence (per yfinance annual financials). The shares last traded at 382.99 pence against a 52-week range of 114.0 to 480.0 pence (per yfinance, pulled 2026-05-26), giving a market capitalisation of about £842 million. FY2026 full-year results (year ending 31 May 2026) are expected in the UK summer reporting window; the exact date is not disclosed in this report's source data. All figures are in pounds sterling (GBP); yfinance reports per-share prices in pence (GBp).

1. Company Snapshot

Field	Value
Name	Filtronic plc (per Filtronic's FY2025 final results)
Ticker / Exchange	FTC / London Stock Exchange (AIM) — ORD 0.1p (per yfinance, pulled 2026-05-26)
Sector / Industry	Technology / Communication Equipment — RF for aerospace, defence, space, telecoms infrastructure (per yfinance, pulled 2026-05-26)
Market cap	GBP 842M (per yfinance marketCap, 2026-05-26)
Enterprise value	GBP 827M (per yfinance enterpriseValue, 2026-05-26)
FY2025 revenue (year ended 2025-05-31)	£56.3M (+121% YoY; per Filtronic's FY2025 final results)
FY2025 operating profit	£13.4M (+272% YoY; per Filtronic's FY2025 final results)
FY2025 free cash flow	not disclosed in this report's source data as a stated line; yfinance freeCashflow is -£2.4M (operating cash flow offset by capex; per yfinance, pulled 2026-05-26)
Gross margin (FY2025)	approximately 61% (derived: gross profit £34.5M / revenue £56.3M, per yfinance annual financials — NOT a statutory subtotal in the FY2025 final results)
Net margin (FY2025)	approximately 25% (net income £14.0M on revenue £56.3M, per Filtronic's FY2025 final results and yfinance annual financials)
Employees	186 at 31 May 2025 (FY2024: 133) (per Filtronic's FY2025 final results)
CEO	Nat Edington, Chief Executive Officer (per Filtronic's FY2025 final results)
Headquarters	Sedgefield, United Kingdom (per Filtronic's FY2025 final results)
Website	filtronic.com (per yfinance, pulled 2026-05-26)
Fiscal year-end	31 May (per yfinance lastFiscalYearEnd and Filtronic's FY2025 final results)
Next earnings	FY2026 full-year results, UK summer reporting window; exact date not disclosed in this report's source data
Dividend yield	None — no dividend proposed for FY2025 (per Filtronic's FY2025 final results)
52-week high	480.0p (per yfinance, pulled 2026-05-26)
52-week low	114.0p (per yfinance, pulled 2026-05-26)
Short interest	not disclosed in this report's source data (per yfinance, pulled 2026-05-26)

2. Bull Case vs Bear Case

Bull Case

• Revenue more than doubled in FY2025 to £56.3 million. Per Filtronic's FY2025 final results (year ended 31 May 2025): revenue rose 121% from £25.4 million (FY2024) to £56.3 million (FY2025), building on 56% growth in the prior year. The Chief Executive's review attributes the growth to delivery against the Company's growth strategy and increased demand from its key customer in the space sector.
• Operating-profit and EBITDA inflection. Per Filtronic's FY2025 final results: operating profit rose 272% from £3.6 million (FY2024) to £13.4 million (FY2025), and adjusted EBITDA rose to £17.0 million (FY2024: £4.9 million). The results attribute margin improvement to a more favourable sales mix, including a reduced proportion of low-margin 5G telecommunications equipment.
• Strong cash generation and balance sheet. Per Filtronic's FY2025 final results: cash at bank rose to £14.5 million at 31 May 2025 (FY2024: £7.2 million); net cash (excluding right-of-use property leases) was £12.3 million (FY2024: £5.2 million); cash generated from operating activities was £13.8 million (FY2024: £6.3 million). The Group holds an undrawn £5.0 million revolving credit facility with Santander UK plc signed in October 2024.
• Strategic partnership with SpaceX expanded. Per Filtronic's FY2025 final results: the initial strategic partnership with SpaceX was signed in April 2024 and was expanded in FY2025 for further alignment of E-band technology; the final results describe this as the enabler for the 121% revenue growth. New space-sector wins were announced with Viasat, the European Space Agency and Airbus (for its system on the OneWeb constellation).
• Post-period order momentum and structural demand drivers. Per Filtronic's FY2025 final results: post period end the Company secured the largest contract in its recent history of $32.5 million (£24.0 million), following defence and satellite-communications awards from Leonardo and Airbus. The Chairman's statement cites supportive long-term structural growth drivers from the convergence of space, aerospace and defence.

Bear Case

• Single-customer concentration is high. Per Filtronic's FY2025 final results: the Company's lead customer contributed 83% of FY2025 revenue (FY2024: 48%). The results state the Company expects this concentration to decrease going forward as it executes on a growing pipeline, but the current dependence on one customer is material.
• Trailing P/E of 95.7 prices in continued sharp growth. Per yfinance (pulled 2026-05-26): trailing P/E is 95.75, forward P/E is 104.64 and P/S (TTM) is 15.05 — multiples that already discount continued growth and margin expansion.
• SpaceX share warrants reduce reported revenue. Per Filtronic's FY2025 final results: IFRS 15 requires the SpaceX share warrants to be treated as non-cash variable consideration payable to the customer, resulting in a £1.3 million charge to revenue in FY2025 (FY2024: £nil). This is a recurring feature of the customer relationship.
• Currency headwind entering FY2026. Per Filtronic's FY2025 final results: the Company does most of its trading with customers in US dollars and entered FY2026 "facing headwinds from a weakened USD"; the outlook notes hedging is undertaken only against highly probable future cash flows and working-capital exposures.
• Small AIM-listed company — limited float and liquidity. Per yfinance (pulled 2026-05-26): float is 192.6 million shares with average daily volume of 7.1 million; AIM-listed small-caps generally trade with wider bid-ask spreads and lower analyst coverage than larger listed peers.

3. What Does Filtronic Actually Do?

Per Filtronic's FY2025 final results and the yfinance company description: Filtronic designs and manufactures radio-frequency (RF) and millimetre-wave (mmWave) hardware for the space, aerospace, defence, telecoms infrastructure and critical-communications markets. The Company describes itself as operating from two manufacturing sites and three engineering centres of excellence, developing core IP building blocks and transforming them into customised RF solutions across the full RF spectrum, with a track record of over 45 years.

The pulled source data does not provide a segment revenue breakdown table. Per Filtronic's FY2025 final results, revenue is discussed by end market rather than reported segment: the lead customer in the space sector contributed 83% of FY2025 revenue (FY2024: 48%); aerospace and defence revenue grew 11%; and the critical-communications market normalised following elevated levels in the prior year. A full reported-segment split is not disclosed in this report's source data.

Per the yfinance company description (pulled 2026-05-26), Filtronic's product range includes E-band transceiver modules and power amplifiers, tower-top amplifiers, transmit-and-receive modules, custom waveguide diplexers and combiners, front-end modules, GaN amplifiers, microwave and millimetre-wave transceiver products, and a range of filter products. In plain English, Filtronic builds the high-frequency RF hardware used in satellite ground-segment and payload systems, 5G millimetre-wave links and defence/aerospace RF systems — a technically demanding niche of the broader telecoms-and-defence supply chain.

4. The Business Model

Per Filtronic's FY2025 final results: Filtronic's model is hardware design plus UK-based manufacturing of RF and mmWave products, sold predominantly to large customers in the space, aerospace and defence markets. The results describe a manufacturing know-how — the "ability to ramp up production quickly" — developed from years of supplying the high-volume telecoms infrastructure market, which the Company states is highly valued by space and aerospace and defence customers.

Per Filtronic's FY2025 final results: typical sale, design-in and production cycles range from one to three years, offering long-term visibility of the customer order book. Where product development is customer-specific, the Company seeks Non-Recurring Engineering ("NRE") charges to fund the development phase and secure customer commitment; when developing its own technology roadmap and IP, it invests from its own cash reserves (£1.5 million of development costs were capitalised in FY2025, FY2024: £0.7 million). Operating costs rose 68% to £21.0 million in FY2025, with salary-related costs representing 69% of total operating costs. Engineering spend ran at 12% of revenue (FY2024: 11%).

Per Filtronic's FY2025 final results: margin improvement in FY2025 was driven by stronger gross profit on higher revenues and a more favourable sales mix, notably a reduced proportion of low-margin 5G telecommunications equipment. The final results do not present a statutory gross-profit subtotal; a derived gross margin of approximately 61% (gross profit £34.5M / revenue £56.3M) is available from yfinance annual financials only and is not a stated line in the results.

5. Financial Health

5-year income trend (per Filtronic's FY2025 final results for FY2025/FY2024 headline figures and yfinance annual financials for the full series; FY ends 31 May; FY2021 not in source data):

FY (year ended 31 May)	Revenue	Operating profit	Net income	Diluted EPS
FY2025 (2025-05-31)	£56.3M	£13.4M	£14.0M	6.05p
FY2024 (2024-05-31)	£25.4M	£3.6M	£3.1M	1.41p
FY2023 (2023-05-31)	£16.3M	£0.2M	£0.5M	0.21p
FY2022 (2022-05-31)	£17.1M	£1.6M	£1.5M	0.68p
FY2021 (2021-05-31)	not disclosed in this report's source data	not disclosed in this report's source data	not disclosed in this report's source data	not disclosed in this report's source data

Per Filtronic's FY2025 final results: revenue increased 121% in FY2025, profit before taxation rose to £13.4 million (FY2024: £3.4 million) and profit for the year rose to £14.0 million (FY2024: £3.1 million). Basic EPS was 6.42p (FY2024: 1.45p) and diluted EPS was 6.05p (FY2024: 1.41p). A tax credit of £0.7 million was recognised in the year (FY2024: tax charge of £0.2 million), benefiting from R&D tax credits.

Balance sheet (per yfinance annual balance_sheet, FY ends 31 May):

FY	Cash & equivalents	Total debt	Stockholders' equity	Shares outstanding	Buybacks
FY2025 (2025-05-31)	£14.5M	£3.7M	£35.4M	219.0M	£0
FY2024 (2024-05-31)	£7.2M	£3.0M	£17.4M	218.0M	£0
FY2023 (2023-05-31)	£2.6M	£2.3M	£11.5M	215.1M	£0
FY2022 (2022-05-31)	£4.0M	£1.8M	£11.0M	214.8M	£0

Per yfinance annual balance_sheet: stockholders' equity roughly doubled from £17.4M (FY2024) to £35.4M (FY2025), and has roughly tripled from £11.0M (FY2022). Total debt (capital lease obligations) is low at £3.7M. Per Filtronic's FY2025 final results, net cash excluding right-of-use property leases was £12.3 million and net cash including property leases was £10.8 million at 31 May 2025.

Quarterly trend — UK AIM-listed companies typically report only H1 (interim) and full-year results, not quarterly. yfinance does not provide quarterly income-statement financials for FTC.L in this report's source data.

6. Valuation & Market Data

Raw market data only — no commentary on cheap or expensive.

Metric	Value
Share price	382.99p (per yfinance, pulled 2026-05-26)
Previous close	379.00p (per yfinance, pulled 2026-05-26)
Day range	365.00p – 390.00p (per yfinance, pulled 2026-05-26)
52-week high / low	480.00p / 114.00p (per yfinance, pulled 2026-05-26)
Market cap	GBP 842M (per yfinance, pulled 2026-05-26)
Enterprise value	GBP 827M (per yfinance, pulled 2026-05-26)
Shares outstanding	219.9M (per yfinance; 219.0M reported at 31 May 2025 per yfinance annual balance_sheet)
Float	192.6M (per yfinance, pulled 2026-05-26)
Avg daily volume (10d)	7.11M shares (per yfinance averageVolume10days, pulled 2026-05-26)
Volume (latest, 2026-05-26)	1.20M shares (per yfinance, pulled 2026-05-26)
Beta	0.95 (per yfinance, pulled 2026-05-26)
Trailing P/E (GAAP)	95.75 (per yfinance, pulled 2026-05-26)
Forward P/E	104.64 (per yfinance, pulled 2026-05-26)
P/S (TTM)	15.05 (per yfinance, pulled 2026-05-26)
P/B	21.76 (per yfinance, pulled 2026-05-26)
EV / Revenue (TTM)	14.77 (per yfinance, pulled 2026-05-26)
EV / EBITDA	73.66 (per yfinance enterpriseToEbitda, pulled 2026-05-26)
P/FCF	not disclosed in this report's source data (yfinance priceToFreeCashflow is null)
Gross margin (TTM)	not reliably reported by yfinance — the grossMargins field (97.7%) is anomalous; a derived FY2025 gross margin of ~61% (gross profit £34.5M / revenue £56.3M) comes from yfinance annual financials and is not a statutory line in the FY2025 final results
Operating margin (TTM)	10.36% (per yfinance operatingMargins, pulled 2026-05-26; FY2025 operating profit was £13.4M on revenue £56.3M per Filtronic's FY2025 final results, approximately 24%)
Net margin (TTM)	17.80% (per yfinance profitMargins, pulled 2026-05-26)
ROE	31.59% (per yfinance returnOnEquity, pulled 2026-05-26)
ROA	14.30% (per yfinance returnOnAssets, pulled 2026-05-26)
Debt-to-equity	9.5% (per yfinance debtToEquity, pulled 2026-05-26)
Current ratio	2.47 (per yfinance currentRatio, pulled 2026-05-26)
Dividend yield	None (per yfinance, pulled 2026-05-26; no dividend proposed for FY2025 per Filtronic's FY2025 final results)
Short interest	not disclosed in this report's source data (per yfinance, pulled 2026-05-26)
Put/call ratio	not disclosed in this report's source data

7. What Are They Building / What's Coming

Per Filtronic's FY2025 final results (year ended 31 May 2025):

• GaN technology transition. The Company is transitioning core technologies from Gallium Arsenide (GaAs) to Gallium Nitride (GaN), which it states enables higher power, improved efficiency and greater thermal performance for aerospace, defence and satellite-communications applications. The results state that FY2026 will see the launch of a range of products based on GaN technology.
• Higher-frequency RF bands and Prometheus. The Company expanded development into higher-frequency RF bands, most notably V Band, and launched Prometheus, which it describes as the highest-power Solid State Power Amplifier ("SSPA") on the market, capable of very high frequency communications for geostationary satellites.
• Semiconductor chipset platform. Per Filtronic's FY2025 final results, the Chief Executive's review states the Company anticipates "the newly launched Prometheus V band amplifier and the development of a semiconductor chipset platform for rollout in early 2026 will both be important avenues of future growth" (forward-looking statement attributed to the Company).
• New Sedgefield manufacturing facility. The move to a new custom-built facility in Sedgefield was underway for completion in H1 FY2026, doubling the Group's UK manufacturing footprint to meet growing demand.
• Customer diversification. The Company states it is determined to diversify its customer base in FY2026, with announced space wins from Viasat / European Space Agency and Airbus (OneWeb), and aerospace and defence awards including Leonardo, plus revenue to be recognised from prior-year contracts with the European Space Agency, BAE Maritime and QinetiQ.

8. Competitive Landscape

Per Filtronic's FY2025 final results: Filtronic operates in the space, aerospace, defence, telecoms infrastructure and critical-communications markets, positioning itself as a specialist in high-frequency RF and mmWave solutions across the full RF spectrum, supported by an extensive patent portfolio. The competitive niche is that of E-band and higher-frequency RF specialists supplying satellite and defence prime contractors. No peer market data is contained in this report's source data, so the peer rows below are not populated.

Company	Ticker	Market cap	Revenue (TTM)	Gross margin	P/S
Filtronic plc	FTC.L	GBP 842M	£56.3M (FY2025)	not a statutory line (see Section 6)	15.05
Peer 1	not disclosed in this report's source data	not disclosed in this report's source data	not disclosed in this report's source data	not disclosed in this report's source data	not disclosed in this report's source data
Peer 2	not disclosed in this report's source data	not disclosed in this report's source data	not disclosed in this report's source data	not disclosed in this report's source data	not disclosed in this report's source data
Peer 3	not disclosed in this report's source data	not disclosed in this report's source data	not disclosed in this report's source data	not disclosed in this report's source data	not disclosed in this report's source data

The peer market-data rows above are not disclosed in this report's source data. Filtronic's competitive positioning rests on its RF and mmWave IP, UK manufacturing capability, over-45-year track record and patent portfolio, as described in its FY2025 final results.

9. Leadership and Ownership

Per Filtronic's FY2025 final results: the Company is led by Nat Edington (Chief Executive Officer) and Michael Tyerman (Chief Financial Officer), with Jonathan Neale serving as Chairman (both the Chairman's statement and the Chief Executive's review in the FY2025 final results are dated 28 July 2025). The results note new leadership-team appointments during the year, including a new Chief Commercial Officer.

Per yfinance institutional_holders (pulled 2026-05-26): the largest reported holding by name is the Manager Directed Portfolios — Hood River International Opportunity Fund at 0.68% (1,496,763 shares, reported 2026-04-30). Other reported holders are T. Rowe Price Spectrum funds and the Avantis International Small Cap Equity ETF, each below 0.1%. Per yfinance (pulled 2026-05-26): reported institutional ownership is 28.46% and reported insider ownership is 14.02%.

Recent insider transactions (per yfinance insider_transactions, pulled 2026-05-26):

• 2026-05-18: David John and Monique Newlands — 1,895,750 shares, disposition ("D"); no monetary value disclosed in this report's source data.
• 2026-04-29: Diana Marguerite Dixon — 5,000,000 shares, disposition ("D"); no monetary value disclosed in this report's source data.
• 2026-04-23: John Bernard Behrendt — 30,000 shares sold at 3.74 per share (value £112,320 per yfinance).
• 2026-04-21: Jonathan Neale — 65,151 shares sold at 3.31 per share (value £215,584 per yfinance).
• 2026-04-17: David John and Monique Newlands — 2,141,750 shares, disposition ("D"); no monetary value disclosed in this report's source data.

10. Risks and Challenges

• Single-customer concentration (Concentration): Per Filtronic's FY2025 final results (year ended 31 May 2025): the lead customer contributed 83% of FY2025 revenue (FY2024: 48%). The results state "while our lead customer accounts for a significant percentage of our revenue in FY2025, we expect this concentration to decrease going forward as we execute on a growing pipeline of opportunities elsewhere in the market".
• Order-driven, lumpy revenue (Market & Demand): Per Filtronic's FY2025 final results: revenue moved from £17.1m (FY2022) to £25.4m (FY2024) to £56.3m (FY2025), with sale, design-in and production cycles of one to three years; revenue is exposed to the timing of large contracts and constellation-expansion demand from the lead customer.
• SpaceX share-warrant charge to revenue (Financial): Per Filtronic's FY2025 final results: "IFRS 15 'Revenue from Contracts with Customer' requires the SpaceX share warrants to be treated as a non-cash variable consideration payable to the customer. Therefore, there was a charge to revenue in the year of £1.3m (2024: £nil)."
• Foreign-currency exposure (Financial): Per Filtronic's FY2025 final results: the Group "does most of its trading with customers in US dollars" and entered FY2026 "facing headwinds from a weakened USD"; hedging is undertaken only against highly probable future cash flows and working-capital exposures.
• RF engineering skills shortage (Operational): Per Filtronic's FY2025 final results: "Recruitment of RF engineers remains a significant industry-wide challenge"; the Company opened a Cambridge engineering site and is expanding graduate and apprenticeship recruitment to mitigate this constraint.
• Manufacturing scale-up and facility move (Operational): Per Filtronic's FY2025 final results: the move to a new custom-built Sedgefield facility was underway for completion in H1 FY2026, doubling the UK manufacturing footprint; scaling production to meet increased demand from the key customer required step changes in production volumes and operational complexity.
• Macroeconomic and geopolitical volatility (Market & Demand): Per Filtronic's FY2025 final results: the Company stated it "anticipate[s] continued macroeconomic and geopolitical volatility in the coming 12 months", while noting underlying demand for advanced RF and mmWave solutions remains strong.
• Warranty and dilapidation provisions (Operational): Per Filtronic's FY2025 final results: the Group provides product warranties (warranty provision £0.2m at 31 May 2025, FY2024: £0.4m) and leases five sites requiring restoration to original condition (dilapidation provision £0.3m at 31 May 2025, FY2024: £0.0m).
• Competitive, price-sensitive telecoms equipment market (Competitive): Per Filtronic's FY2025 final results: the 5G telecommunications equipment market is "characterised by its highly competitive price sensitivity"; the Company reduced its proportion of this low-margin business in FY2025.
• Valuation leaves limited margin for deceleration (Financial): Per yfinance (pulled 2026-05-26): trailing P/E 95.75, forward P/E 104.64, P/S 15.05 and EV/Revenue 14.77 — multiples that discount continued strong growth.

11. Recent Developments

Most recent first.

• 2026-05-18 — Insider disposition (David John and Monique Newlands, 1,895,750 shares): Disposition ("D") recorded; no monetary value disclosed in this report's source data. Source: yfinance insider_transactions (pulled 2026-05-26).
• 2026-04-29 — Insider disposition (Diana Marguerite Dixon, 5,000,000 shares): Disposition ("D") recorded; no monetary value disclosed in this report's source data. Source: yfinance insider_transactions (pulled 2026-05-26).
• 2026-04-23 — John Bernard Behrendt sold 30,000 shares at 3.74 per share (£112,320): Open-market disposal recorded. Source: yfinance insider_transactions (pulled 2026-05-26).
• 2026-04-21 — Jonathan Neale sold 65,151 shares at 3.31 per share (£215,584): Open-market disposal recorded. Source: yfinance insider_transactions (pulled 2026-05-26).

No company news items with populated titles, publishers or links are present in this report's source data for the trailing-30-day window.

12. Key Dates Coming Up

• 31 May 2026 — FY2026 fiscal year-end: FY2026 closes at the end of May 2026 (per yfinance lastFiscalYearEnd / nextFiscalYearEnd). The completion of the new Sedgefield facility was scheduled for H1 FY2026 per Filtronic's FY2025 final results.
• FY2026 full-year results: Expected in the UK summer reporting window; the exact date is not disclosed in this report's source data. (For reference, the FY2025 final results were dated 28 July 2025 per Filtronic's FY2025 final results.)
• FY2026 GaN product range launch: Per Filtronic's FY2025 final results, a range of products based on GaN technology is expected to launch in 2026; the exact date is not disclosed in this report's source data.

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