SOMNIGROUP INTERNATIONAL INC. (SGI) stock intrinsic value fair value estimate & owner earnings analysis

Somnigroup International (formerly Tempur Sealy International) is the world's largest bedding manufacturer, making and selling mattresses and other sleep products under the Tempur-Pedic, Sealy and Stearns & Foster brands. On February 5, 2025 it completed the acquisition of Mattress Firm, the largest U.S. mattress retailer with roughly 2,300 stores, turning a company that had mostly sold through other retailers into a vertically integrated manufacturer-retailer: sales made directly to consumers jumped from about a quarter of revenue in 2024 to nearly two-thirds in 2025. Because this deal changed the business so substantially, this valuation is anchored on 2025 results, the first full year that includes Mattress Firm, rather than on the years before the deal, which describe a smaller, wholesale-only company. Owner earnings (the cash the business generates for shareholders after the spending needed to keep it running, before any growth investment) came to roughly $2.57 per share in 2025 - only slightly below the roughly $2.63 per share the standalone manufacturing business earned in 2024. That near-flat result absorbed about $170 million of one-time deal and integration costs disclosed in the filing, which will not repeat; results in the first half of 2026 already show earnings well above the comparable 2025 period as those costs fade. All of 2025's capital spending was treated as the ongoing cost of running the now-larger combined business rather than growth investment, since the revenue increase was entirely the acquisition rather than new capacity, and nothing in the filing points to new plants or facilities under construction. Three cases were built: - Bear case (about $36/share): the merger's promised cost savings largely fail to materialize, the roughly $4.7 billion of acquisition debt (mostly variable-rate) remains a drag on results, and mattress demand goes through a downturn similar to 2022, when a post-pandemic pullback briefly pushed owner earnings to almost nothing. Earnings stagnate near today's level, with a multi-year dip before a partial recovery. - Base case (about $57/share): the one-time deal costs finish rolling off, a meaningful but partial share of the savings from combining Tempur Sealy's manufacturing with Mattress Firm's retail footprint is realized over the next two to three years, and growth then settles into the low single digits that has characterized this mature, replacement-driven industry historically. - Bull case (about $73/share): closer to full realization of the promised savings, continued margin benefit from selling more product directly to consumers, and steady paydown of acquisition debt from free cash flow, without a demand downturn along the way. Given the added leverage and the fact that only one year of combined results exists to judge the deal by, the margin-of-safety price allows a real cushion against the acquisition underdelivering or demand turning down again - so the margin-of-safety price of $36 sits close to what the business would be worth even if the bear case plays out, rather than being a simple discount off the base case. One note on sourcing: management cites roughly $100 million of 'future cost synergies' in its credit agreement disclosures - this is an unaudited management estimate, not a demonstrated result, so it was given only partial credit, and only in the bull case.