Perimeter Solutions: The $1.3bn Fire Retardant Bet and the Founder Bill Coming Due

A Red-Trail Monopoly: How Perimeter Supplied the Fire Lines

The aircraft skimming treetops to drop a long red trail aren't releasing water; they're laying Fire-Trol 931, a chemical retardant slurry made by Perimeter Solutions. The New York-listed American company has turned that red line into a near-unassailable business, capturing decades-long contracts from the US Forest Service, California's forestry agency, and even the logistics arm of the US military. Revenue has more than doubled in two years, from $322m in 2023 to $653m in 2025, with fire retardants accounting for roughly three-quarters of sales.

At the core of the moat is a certification process measured in years. In September 2025, the Forest Service selected Perimeter as its sole supplier for a five-year, $1.3bn contract, promising taxpayers $153m in savings. The award cements a position where roughly 50 cents of every revenue dollar flows through to adjusted EBITDA and barely 4.5 cents goes into plant spending. The only challenger to enter in two decades, Fortress (a Compass Minerals unit), shut down after its product corroded two air tankers in its first full season, leaving Perimeter's 60 bases across North America without serious rivals.

Even when fire seasons disappoint, the business has held up: in 2023, burned acreage halved and retardant sales dipped by $21.3m, but firefighting foams filled the gap. The real damage came from the other division—engine-oil additives—whose industrial customers simply ran down inventory. To insulate itself further, Perimeter acquired medical-device maker MMT in January 2025 for $685m, adding a non-fire revenue stream, and bought Monaco Enterprises in July. Yet the company's financial story is not just about putting out blazes; it is increasingly about what may be left for public investors once the founders are paid.

Behind the Retardant: Founder Payouts, Debt, and Buyback Arithmetic

Why No Competitor Has Really Threatened Perimeter

The Fortress episode is instructive. After years navigating federal certification, Fortress entered the market just before 2023. Immediately, corrosion issues forced its parent to abandon the business by March 2025. With every air tanker grounded by a faulty product representing a crisis, government agencies prize reliability above price competition. That institutional memory acts as a formidable barrier, effectively leaving Perimeter as the default option, while the 60-strong base network with tanks, mixers and crews makes it the only supplier that can deliver at short notice to 150+ sites.

The SPAC's Long Tail: How Founder Fees Became a $435m Charge

Perimeter did not arrive on the public markets through a typical IPO. It came via EverArc, a London-listed SPAC assembled by William Thorndike (co-chair of Perimeter and author of 'The Outsiders'), Nick Howley and current CEO Haitham Khouri. The SPAC's incentive plan promised the founders the equivalent of 2.4 million shares annually through 2027, plus, through 2031, an additional 18% of any increase in market value above previously paid-out levels. When the stock cleared those thresholds in 2025, a $435m expense was triggered—larger than the entire year's adjusted EBITDA. That resulted in a reported net loss of $206m, even as operations generated strong cash. The founders were paid mostly in shares, 13.4 million of them, representing about 9% of the equity.

The Buyback Irony: Repurchasing Shares While Diluting Owners

Management has been aggressive with share buybacks, acquiring 25.4 million shares for $168m between 2022 and 2025, mostly at prices around $5. The average repurchase price sits at just $6.63, a fraction of the current $33. At the same time, the founders have been handed nearly as many shares—13.4 million—over the same period. With another $631m still owed and up to 8.5 million additional shares set to be issued within a year, the buyback program has not prevented net dilution. The balance sheet has also changed: long-term debt swelled from $669m at end-December to $1.21bn at end-June, largely to fund the MMT acquisition.

Valuation: Paying for a Fire Season That Might Not Come

At $33, the stock trades at 15.5 times expected 2026 adjusted EBITDA, above its four-year average of 13.5 times. More importantly, enterprise value represents about 42 times expected 2026 free cash flow and 22 times for 2027, with no dividend to ease the wait. Two federal agencies—the Forest Service and Bureau of Land Management—account for 43% of sales, yet their purchase volumes are not guaranteed. If fire seasons turn mild or a competitor eventually clears certification, Perimeter's earnings could slip. The market is betting that a steady stream of large wildfires will keep the red trails flowing and that the founder payout will erode slowly enough for the equity to appreciate. The risk is that shareholders are left holding a shrinking claim while the bill to the founders keeps coming due.

What Shareholders Must Watch Now

• Track the quarterly share count. Up to 8.5 million additional founder shares may be issued within a year, directly diluting existing holders. Compare issued shares against the 25.4 million repurchased since 2022 to gauge net dilution.
• Watch for competitor certification. If a rival earns USDA approval before the sole-supplier contract expires in 2030, Perimeter could lose a portion of the $1.3bn Forest Service pact, putting its 50%+ EBITDA margins at risk.
• Separate real free cash flow from headline EBITDA. In 2025, operating cash of $238m was partly absorbed by a $435m founder compensation charge. Future cash flows will remain distorted by the remaining $631m obligation, so focus on cash available to equity after all liabilities.
• Monitor capex as the contract shifts to powdered retardants. The Forest Service mandate for powdered products and more full-service sites could push plant spending above the current 4.5%-of-sales floor, squeezing cash that might otherwise fund buybacks or debt paydown.
• Assess the debt burden against fire-season unpredictability. Net debt of $1.21bn at end-June leaves little margin if wildfire seasons disappoint or if the MMT acquisition fails to deliver the expected diversification. Check interest coverage and free cash flow generation in the next two quarterly reports.