GRIFFON CORP (GFF) stock intrinsic value fair value estimate & owner earnings analysis

Griffon is now essentially a garage door company. Its Clopay business (with the Ideal and Holmes brands, plus CornellCookson rolling steel doors) is the largest maker of residential and commercial garage doors in North America, and it also owns the Hunter, Casablanca and Jan Fan ceiling fan brands. In June 2026 Griffon put its AMES lawn, garden and tool business in North America into a new company, Veritage Brands, controlled by ONCAP. Griffon received $100 million in cash and a $161 million second-lien note that pays its interest in additional notes rather than cash, and it kept 43% of the venture. On July 31, 2026 it did the same with AMES Australasia: it received about $181 million in cash and a $49 million note, and it kept 49%. AMES U.K. was shut down in March 2026 and is being wound up. Because the company changed so much, older company-wide cash flows describe a different business, so we value the business that remains. In the first nine months of fiscal 2026 (to June 30), the remaining business brought in $1.36 billion of revenue, up 3%. Operating cash flow was $218 million. We remove working-capital swings and charge stock pay ($21 million) and capital spending ($24 million) as real costs. Before interest, that left about $245 million, up about 1.6% on the same period a year earlier once we strip out a one-time tax benefit from the 2025 Hunter write-down. Scaled to the company's expected full-year revenue of about $1.8 billion, and with capital spending set at about $45 million a year, we use about $310 million (about $6.87 per share) of yearly cash flow before interest as the starting level. Clopay's earnings have held at roughly this level since 2023 even though housing activity has been weak. Residential door volumes fell, but price increases covered higher costs. We added back the $244 million of Hunter goodwill and trademark write-downs taken in 2025 because they are non-cash. We give no credit to the paper interest on the AMES notes or to Griffon's share of the joint ventures' profits. We value those holdings separately instead. Base case ($106.78 per share): cash flow grows 1.5% next year, which matches the recent 1.6% pace, and then 1% a year through 2036 as Clopay keeps raising prices to offset higher costs, as it has done each year since 2021. After that it stays flat for good. Garage doors wear out and get replaced, and Clopay's dealer network and scale are lasting advantages, but we assume no growth beyond that. That gives a business worth about $5.61 billion ($124.35 per share). Debt is about $1.27 billion, mostly the $975 million of 5.75% notes due March 2028; the $285 million term loan was repaid after June. Netting off cash above operating needs, including the Australasia proceeds, leaves about $1.02 billion owed ($22.67 per share). We add the AMES stakes and notes at 70% of the $329 million value Griffon has recorded for them, or $5.10 per share. The cash goes to the venture's senior lenders first, and the notes pay in more notes rather than cash. Bear case ($63.44 per share): this case is built from problems that are already visible. Gross margin fell to 47.0% from 48.7% in the June 2026 quarter. Clopay's segment earnings slipped in both 2024 and 2025 as material, labor and freight costs rose. Hunter imports products from China, and tariffs on them led to the 2025 write-down. In this case cash flow falls to $230 million by 2029 and stays there, which would mean Clopay's margins shrink and Hunter's profit disappears. The business is worth about $3.92 billion ($86.75 per share). Debt is $1.135 billion ($25.13 per share). That figure includes about $111 million of extra cost from refinancing the 2028 notes at around 8%. The AMES holdings count at 25% of recorded value ($1.82 per share). Even then, cash flow covers interest about three times over. Bull case ($147.54 per share): pricing keeps outrunning costs, as it did in the June 2026 quarter when price and mix added 6%. Cash flow grows 3% a year for ten years and 1% after that. The business is worth about $7.36 billion ($162.92 per share), less $22.67 per share of debt, plus the AMES holdings at full recorded value ($7.29 per share). Our previous estimate was lower ($71 base). It relied on management's EBITDA target and on higher discount rates. We now use the cash the remaining business has actually produced since the separation, discount every case at a single 6% rate, and show risk through the gap between the cases. The $181 million of Australasia cash that arrived in July also lowered net debt. We could not tie out precisely three items: the remaining fourth-quarter 2026 results, the value of the 49% Australasia stake, which Griffon has not yet recorded and which we count at zero, and the small leftover U.K. assets. The main risks to this valuation are a lasting break in garage-door pricing, a long slump in new housing and repair spending, and refinancing the 2028 notes on poor terms.