Unum Group (UNM) stock intrinsic value fair value estimate & owner earnings analysis

Unum Group, a 178-year-old Chattanooga, Tennessee insurer, sells disability, life, accident, critical illness and other employee benefits, mainly through employers. Its segments are Unum US (group long-term and short-term disability, group life, individual disability), Colonial Life (voluntary benefits sold at the workplace), Unum International (United Kingdom and Poland, about 9 percent of revenue) and a Closed Block of businesses no longer sold, chiefly long-term care, which the company stopped offering in 2009 (individual) and 2012 (group). Revenue was $13.1 billion in 2025, up about 1.9 percent a year on average since 2016 ($11.0 billion in 2016). HOW WE MEASURED EARNINGS. For an insurer the cash flow statement is full of large reserve and receivable movements that mostly offset one another, so we stripped all of them out and measured owner earnings as net income plus non-cash items, less share-based compensation and the maintenance portion of capital spending. Two one-time cash transfers to reinsurers were excluded as balance-sheet transactions rather than operating costs: $456.8 million in 2021 and $945.3 million in 2025 (the Fortitude Re deal). 2020 is not used because a $1.08 billion reinsurance cash transfer and a $1.2 billion realized gain distort it. Unum's cash flow statement has no separate share-based compensation line, so we deducted the disclosed expense ($53.6 million in 2025) once; if the operating cash flow already reflects it, our figures are slightly conservative (by up to roughly 5 percent). Owner earnings per diluted share were $3.46 (2021), $5.93 (2022), $5.20 (2023), $8.33 (2024) and $4.55 (2025); in dollars, $709 million, $1,199 million, $1,028 million, $1,567 million and $787 million. WHAT DROVE THE SWINGS. Each third quarter Unum reviews its reserve assumptions. In the long-term care block these reviews added $368.1 million to reserves in 2023, released $174.1 million in 2024 and added $643.1 million in 2025 (the 2025 update removed assumed future improvements in illness and mortality and raised expected claim incidence). Favorable updates in group long-term disability ($121.0 million, $90.0 million and $105.8 million released in 2023, 2024 and 2025) partly offset them. This is why 2024 looks strong and 2025 weak. We anchored on the median of 2021 to 2025, $1,028 million a year, because that window is the business after the accounting change for long-duration insurance contracts and captures both a favorable and an unfavorable reserve year. Spread over the roughly 160 million diluted shares outstanding in mid-2026 (down from about 257 million in 2014 because of buybacks), that is about $6.43 per share. First-half 2026 net income of $488.9 million (about $978 million annualized) is consistent with that level, so we did not move it. GROWTH CHECK. Owner earnings in 2025 were about 50 percent below 2024 (about 45 percent per share). Our base case assumes 1.5 percent growth in year one from the normalized level, not from the depressed 2025 figure. The specific reason the 2025 fall does not carry forward is that it was caused by the $643.1 million long-term care update booked in the third quarter of 2025, set against a 2024 that contained favorable updates; both are already inside the five-year median. HOW DEBT IS TREATED. As an insurer, Unum's borrowing and reserves are the raw material of the business and interest is an operating cost, so we value earnings after interest and subtract no debt. For reference, borrowings were $3.77 billion at the end of 2025, with about $201 million of interest paid that year, and shareholders' equity was $10.8 billion at June 2026. BASE CASE, $120.4 per share (about $19.3 billion). Earnings of $1,028 million grow 1.5 percent a year for ten years, then stay flat. Credited growth is the continuation of premium growth from renewals and persistency, which has run at 1.9 percent a year for nine years through the pandemic, and we use a rate below that. We left out new products, share gains, margin improvement and international expansion (Colonial Life sales rose 5.3 percent in 2025, but sales growth is not yet earnings) because none is contracted or an established repeatable pattern. After year ten nothing further is assumed to grow; the employer relationships and long-tail claims book are structural, but we credit only a steady level. Business worth about $19.3 billion, debt subtracted zero, difference about $19.3 billion, or $120.4 per share. BEAR CASE, $53.6 per share (about $8.6 billion). Earnings settle at $700 million, about the level of the weakest years since 2020 ($709 million in 2021 and $787 million in 2025), and then shrink 2 percent a year indefinitely. The named drivers are further long-term care reserve strengthening of the size booked in 2023 and 2025, and the run-off of the Closed Block, whose adjusted operating income already fell from $137.8 million to $63.5 million in 2025 as its invested assets shrank. Borrowings of $3.77 billion are serviced from earnings in this case, so we assume no refinancing failure. Business worth about $8.6 billion, debt subtracted zero, difference about $8.6 billion. BULL CASE, $152.8 per share (about $24.5 billion). Earnings return to $1,265 million, the average of 2022 to 2024, and grow 1.9 percent a year for ten years (the demonstrated premium growth rate), then stay flat. This requires no new events, only that reserve updates net out as they did across 2022 to 2024. Business worth about $24.5 billion, debt subtracted zero, difference about $24.5 billion. STRESS TEST. We challenged the idea that 2025 was a one-off with a specific fact: long-term care updates hit results in 2023, 2024 and 2025, in opposite directions. So we did not lift the normal level above the median, and the bear case carries repeat charges. WHAT CHANGED SINCE OUR EARLIER ESTIMATE. Our earlier estimates were $57.80, $120.00 and $183.40 for the bear, base and bull cases. The base case is essentially unchanged. The bear case is slightly lower because we now build it from the actual long-term care update history and the Closed Block run-off. The bull case is lower because the earlier version assumed 4 percent growth that the company's track record does not support; we now use the 1.9 percent it has actually delivered. We also now use a fixed 6 percent discount rate and a cash-flow-based earnings measure in place of the earlier net-income shortcut. What would make this wrong: additional large long-term care charges or adverse claim trends in group disability would push results toward the bear case; the Fortitude Re reinsurance deal (July 2025; about 21 percent of the Closed Block long-term care reserves and 15 percent of Unum US individual disability reserves ceded) removes both investment income and claim payments, and its net effect on future earnings could differ from what we assumed. MARGIN-OF-SAFETY PRICE. The margin-of-safety price is about $72, roughly 40 percent below the base case and about a third above the bear case, given the reserve-assumption risk in the long-term care block.