FORTERRA PLC (FORT) — Investment Research Note

Executive summary

Forterra is a UK manufacturer of clay bricks (c.80% of profit), aircrete/aggregate concrete blocks and precast concrete flooring, selling almost exclusively into UK housebuilding and RM&I markets. Across 2021–2025 the group endured a brutal cyclical downturn — brick volumes fell c.30% from 2022 levels, EBITDA roughly halved from £89m (2022) to £52–62m (2024–25), and the balance sheet moved from net cash to ~£56m net debt — but 2025 showed stabilisation (adj. EBITDA +18.5% to £61.6m, leverage back to ~1x) with the £140m capex programme at Desford/Wilnecote/Accrington now substantially complete. The single most important valuation point is that the stock trades on today's distressed earnings (~5x EV/EBITDA) while installed capacity could deliver mid-term EBITDA of £100–120m once UK housebuilding normalises — but with cyclical/weather-driven timing uncertainty and almost zero AI exposure.

Fair value estimate

Methodology: Through-the-cycle EV/EBITDA, cross-checked against normalised FCF yield.

• Current state (anchor): 2025 adj. EBITDA £61.6m, net debt (pre-leases) £55.7m, 199m shares. EV at 150p = £298m + £56m = £354m → 5.7x 2025 EV/EBITDA.
• Mid-cycle EBITDA: Management reaffirms a £100–120m medium-term EBITDA ambition on return to 2022-type conditions ( 2024-11 trading update, 2024-03 FY23). Taking a cautious £85–100m through-the-cycle number (acknowledges some permanent demand destruction vs 2022's 2.5bn brick consumption, now 1.8bn).
• Multiple: 6.5–7.5x EV/EBITDA for a UK cyclical building-products business with ~1x leverage, 50-year mineral reserves and oligopolistic brick market.
• EV range: £85m × 6.5x = £553m to £100m × 7.5x = £750m. Deduct £56m net debt → equity value £497–£694m, mid £596m.
• Per share: £497–£694m / 199m shares = 250p – 349p, mid ~300p.
• Implied market cap range: £497m – £694m.
• vs. £313m current: upside ~59% to midpoint (range: +59% to +122%).

The upside depends almost entirely on housebuilding recovery, not AI tailwinds.

Sector context

Confirmed as Industrials / Construction & Materials. Forterra is a mid-sized UK heavy-side building products specialist. Quality profile: in line with sector — strong UK brick market share (one of three domestic brick producers), unique Fletton/London Brick franchise, 90m-tonne clay reserves (50-year supply), but cyclically exposed and currently sub-scale on capacity utilisation (~60%). Leverage (~1x) is below sector average. Listed peers: Ibstock plc (closest direct peer — UK clay bricks), Michelmersh Brick Holdings (smaller specification brickmaker), Marshalls plc (concrete/landscape products, broader exposure).

Investment thesis

• Operating leverage to housebuilding recovery with recently expanded capacity. 2025 brick output ran at ~60% of installed capacity; the £140m Desford/Wilnecote/Accrington programme is now substantially complete with lower capex going forward 2026-03 FY2025. Management reaffirms £100–120m mid-term EBITDA versus £61.6m in 2025 2024-11 trading update.
• Oligopolistic UK brick market with structural import substitution. Imports still ~20% of UK consumption (and rose above 25% in 2022 when domestic capacity was tight); mineral/planning barriers mean no new greenfield entrants in 20+ years 2026-03 FY2025, 2024-03 FY2023. Forterra is positioned to displace imports as recovery comes.
• Capital-returns-committed balance sheet. Leverage returned to ~1x adj. EBITDA, £20m buyback launched for 2026 (6.4% of current market cap), progressive dividend at ~2x cover (6.2p FY25 vs 3.0p FY24), optionality for continued returns 2026-03 FY2025.

Key risks

• Cyclical housing demand still soft. 2026 YTD revenue (to April) was down 11% like-for-like with wet weather and Middle East-driven cost inflation pressuring demand 2026-05 AGM update. The recovery timetable is uncertain and management has widened its 2026 outcome range.
• High fixed cost base means pricing power is critical in a soft market. Despite "stable" 2025 brick pricing, mix-shift to cheaper extruded brick eroded like-for-like realised price; brick prices remain mid-to-high single digits below end-2022 2026-03 FY2025. Any price war with Ibstock or imported product would materially impair the thesis.
• Energy, transport and gas cost volatility. 2026 Middle East crisis has driven renewed cost pressure; 80% gas-cost coverage for 2026 mitigates but doesn't eliminate the risk, and 2027 coverage is lower 2026-05 AGM, 2026-03 FY2025.

Operating leverage

This is Forterra's defining financial characteristic. Brick manufacturing has a very high fixed-cost share: at ~60% capacity utilisation in 2025 the business delivered 16.0% adj. EBITDA margin, while in 2022 at near-full utilisation it earned 19.6% 2026-03 FY2025, 2023-03 FY2022. The incremental drop-through on recovering volume is substantial — management explicitly guides to EBITDA stepping up by £25m from the Desford factory alone at 2022-level demand 2024-11 trading update, 2024-03 FY2023, plus £7m from Wilnecote. Walking from 2025's £61.6m EBITDA to the £100–120m medium-term target implies roughly a doubling of operating profit on revenue uplift of ~25–35% — a classic 2.5–3x operating leverage ratio. This is why the stock has long-tail upside: if 2026/27 UK housebuilding meaningfully re-accelerates (government housing targets, falling rates), the earnings recovery would be disproportionate. However, operating leverage cuts both ways; a prolonged flat market keeps margins trapped.

Value-trap signals

• Deeply cyclical end-market with no identified recovery catalyst in 2026; management explicitly expects "demand in 2026 similar to 2025" 2026-03 FY2025.
• Dividend was cut in 2023 (14.7p → 4.4p) and only partially restored (6.2p FY25), signalling cautious capital returns.
• Repeated 2023 guidance downgrades (July 2023 and October 2023 both lowered FY expectations) 2023-07, 2023-10 trading updates.
• Non-core exits (Formpave, Bison Bespoke Precast closed in 2025) and Howley Park brick factory permanent closure signal structural capacity rationalisation 2026-03 FY2025, 2025-03 FY2024.

These do not indicate terminal decline (reserves, market share and new asset base are all healthy), but they do suggest the "trough earnings" thesis depends on a recovery that is not yet visible.

Earnings vs. expectations

• FY2022: Delivered strong result "slightly ahead" of expectations 2023-01 trading update → Beat.
• FY2023: Multiple downgrades through year (July guided to flat H1/H2 split vs previously anticipated improvement; October lowered again) 2023-07, 2023-10 → Miss / Miss.
• FY2024: Adj. EBITDA £52m vs guided "around £50m" 2025-01 trading update → Slight beat / in line.
• FY2025: Adj. EBITDA £61.6m exactly in line with consensus; adj. PBT (£36.0m vs £32.5m consensus) and adj. EPS (12.6p vs 11.8p consensus) ahead 2026-01 trading update, 2026-03 FY2025 → Beat on PBT/EPS.
• 2026 YTD: AGM update warned of wider range of outcomes and 11% LFL revenue decline 2026-05 → Trending soft.

Pattern: Mixed. Strong beats in 2022 and 2025, significant misses through 2023 as the cycle turned, in line to slight beat in 2024. Management credibility is adequate but not exceptional — they tend to guide conservatively but have been wrong-footed by cyclical turns.

Conviction

Rating: 3 — moderate

Anchors: (1) Clean, well-disclosed IFRS financials with consistent APM reconciliations across 5 years; (2) explicit management mid-term EBITDA guidance (£100–120m) provides a clear bull-case anchor; (3) tangible asset base (90m tonnes mineral reserves, £140m recent capex) supports replacement-cost floor.

Limits: (1) Fair value hinges entirely on timing and magnitude of UK housebuilding recovery, which is uncertain through 2026/27; (2) sensitivity to a modest multiple shift (6x → 8x) materially changes the fair value — this is cyclical and multiples are historically range-bound 5-9x; (3) 2026 YTD trading is deteriorating, implying the medium-term EBITDA case is further out than previously thought.