INSTEEL INDUSTRIES INC (IIIN) stock intrinsic value fair value estimate & owner earnings analysis

Insteel Industries, based in Mount Airy, North Carolina, is the largest U.S. maker of steel wire reinforcing for concrete. It runs eleven U.S. plants making two products: prestressed concrete (PC) strand, used in bridges, parking decks and other precast structures, and welded wire reinforcement, used in buildings, concrete pipe and culverts, driveways and slabs. About 70% of fiscal 2025 sales went to makers of concrete products and 30% to distributors, rebar fabricators and contractors; no customer reached 10% of sales. Sales are made across the United States, with much smaller volumes in Canada, Mexico and Central and South America. What drives earnings. The only major raw material is hot-rolled steel wire rod, a commodity. Selling prices follow rod costs, but the company's own filings say that supply, demand and competition, not the company, decide whether the gap between the two widens or narrows. That gap is the whole story. Gross margin was 15.6% in fiscal 2018, fell to 6.6% in 2019 when low-priced imports took shipments and spreads narrowed, reached 23.9% in the 2022 steel-price surge, then was 10.1% in 2023, 9.4% in 2024 (weak demand, competitive pricing in welded wire and low-priced PC strand imports) and 14.4% in 2025. In the first nine months of fiscal 2026 (to June 27, 2026) it was 10.3% against 13.8% a year earlier; net earnings were $21.8 million against $26.5 million, on sales up 12.7% to $530.2 million. How we measure earning power. We count the cash the business generates for its owners after stock compensation and the capital spending needed to stay in business, and we strip out swings in receivables, inventory and payables. Those swings are large here: in fiscal 2022 inventories rose $118.6 million on higher raw material purchases, and in 2023 $94.3 million of inventory came back out. On that basis, owner earnings per share for fiscal 2016 through 2025 were $1.92, $0.80, $1.54, $0.45, $1.29, $3.44, $6.64, $0.59, $0.94 and $2.80. The middle value of the ten is $1.42, and that is the normal level we use. We use all ten years because they contain two import-driven troughs (2019 and 2023-24), the pandemic year and the 2021-22 boom, and using the middle value stops 2022's $6.64 from dominating. For the nine months to June 27, 2026 the same measure is $1.39 per share; the third and fourth quarters are the seasonally strongest, so that is not a full-year figure, but the thinner margins give no reason to raise the normal level. Growth. Owner earnings nearly tripled in fiscal 2025 (from $0.94 to $2.80) as margins recovered and acquisitions were added. In every case below we assume zero growth from the normal level. Price increases and margin recovery depend on the market, not on anything secured, and the company reports minimal backlog, with most orders shipping within a quarter. In October and November 2024 it bought Engineered Wire Products ($67.0 million) and O'Brien Wire Products of Texas ($5.1 million), which on the company's pro forma figures added about $93 million of annual sales. We tested whether that should lift the normal level: pro forma pre-tax earnings for fiscal 2024 including both businesses were $22.8 million, below the $25.3 million the company actually reported, so there is no evidence yet that the purchases raised earning power, and the level is unchanged. Debt and cash. The company had no borrowings at September 27, 2025, and its June 27, 2026 balance sheet shows only payables and accrued liabilities as current liabilities and no long-term debt. It has an undrawn $100 million revolving credit line maturing March 15, 2028 ($98.7 million available at September 27, 2025 after letters of credit). Cash was $22.9 million at June 27, 2026, down from $38.6 million at September 27, 2025 and $111.5 million a year earlier, after the two acquisitions and large dividends: a special $2.50 per share in fiscal 2024, a special $1.00 in December 2024, and $1.09 per share declared in the first nine months of fiscal 2026. We treat cash as working capital and do not add it to value, because inventory swings of the size above need cash and the interest it earns is already inside owner earnings. Because there is no debt, in every case the business is worth what the shares are worth and the company owes nothing against it. Case values are today's worth of the owner-earnings stream at a flat 6% a year. Base case, $23.63 per share. Owner earnings stay at $1.42 a share indefinitely, with no growth. What keeps that going is already in place: owner earnings were positive in all ten years on this measure; Insteel is the largest domestic producer with plants close to customers; anti-dumping and countervailing duty orders won in 2003, 2010 and 2020-21 limit PC strand imports from many countries; and Buy America content rules keep imports out of some applications. The business is worth $23.63, it owes $0, so the shares are worth $23.63. Bear case, $12.19 per share. The two worst episodes in the record, fiscal 2019 ($0.45, low-priced imports and a squeeze between selling prices and rod costs) and fiscal 2023-24 ($0.59 and $0.94, weak demand, competitive pricing in welded wire and PC strand imports), are repeated as one longer downturn: five years at $0.52 a share (the average of $0.45 and $0.59), which is longer than either trough in the record. Earnings then settle permanently at $0.80, the middle of the five weakest years, with no return to $1.42 because the import and competitor-pricing pressures are disclosed as continuing features of this industry. Five years at $0.52 is worth $2.19 and the permanent $0.80 afterwards is worth $10.01 today. The business is worth $12.19, it owes $0, so the shares are worth $12.19. This case does not model a construction collapse deeper than anything in the ten years of filings reviewed. Bull case, $46.72 per share. Fiscal 2025's $2.80 a share is sustained indefinitely: a 14.4% gross margin on the enlarged post-acquisition business ($647.7 million of sales). $2.80 is also the middle value of the last five years. The 2022 figure of $6.64 is left out because nothing identifiable makes that spike repeatable. The business is worth $46.72, it owes $0, so the shares are worth $46.72. Previous figures (bear $9.63, base $20.45, bull $40.29, margin-of-safety price $6.75) were built on a different basis and are not comparable. How we reached the margin-of-safety price of $7.00. How sure are we of the earnings level? Moderately. The ten annual figures run from $0.45 to $6.64 and reconcile to the cash flow statements, but the next several years could sit anywhere in that range, and the first nine months of fiscal 2026 show margins well below fiscal 2025. The worst plausible outcome is a long squeeze from imports and competitor pricing, or a construction downturn deeper than the last ten years; that is not fully modelled. The structure would survive it: no debt, an undrawn $100 million credit line, $22.9 million of cash, capital spending that the company describes as largely discretionary, and no customer above 10% of sales. The risks that remain are that management spends cash on further acquisitions (it spent $72.1 million in fiscal 2025) and that dividends, other than a regular payment of about $2.4 million a year (roughly 12 cents a share), are discretionary. If we are wrong about the normal level, and it is really $0.80 (the middle of the five weakest years) rather than $1.42, each share is worth about $13.39. The price assumes a five-year holding period. Assuming earnings are either paid out or retained and the shares are worth that case's value at year five, from $7.00 the case where the true level is $0.80 forever implies about 20.0% a year, the bear case about 18.0% a year, and the base case about 34% a year. At a higher price the bear and low-level outcomes fall clearly below the 20% target, so the margin-of-safety price is $7.00.