ARRAY DIGITAL INFRASTRUCTURE, INC. (AD) stock intrinsic value fair value estimate & owner earnings analysis

Array Digital Infrastructure is the former United States Cellular. It sold its wireless carrier business to T-Mobile on August 1, 2025, and has since sold most of its spectrum: 3.45 GHz and 700 MHz licenses to AT&T for $1.018 billion (closed January 2026), AWS, PCS and cellular licenses to Verizon for $1.0 billion (closed June 2026), and 600 and 700 MHz licenses to T-Mobile for about $161 million, with about $30 million more awaiting approval. Much of the money has gone straight to shareholders as special dividends ($10.25 in January and $11.00 in June 2026). Telephone and Data Systems owns about 82% of the shares. It proposed in May 2026 to buy the rest in exchange for its own stock and withdrew on September 3, 2026, after the two sides could not agree on value. Three assets remain, and we value each separately. Towers. Array owns about 4,456 towers in 19 states, with roughly one tenant per tower. A master lease signed with T-Mobile at the 2025 sale commits T-Mobile to at least 2,015 towers for 15 years. On top of that, T-Mobile is temporarily renting about 1,800 more towers while it moves customers onto its own network. Those interim leases can be cancelled tower by tower and end by January 2028. Contracted rent excluding the interim sites is about $145 million a year in 2026 and 2027, slipping to about $116 million by 2030 as current terms on other tenants' leases run out. Site rent is running at about $210 million a year today, so roughly $60 million of it is temporary. Once that goes, tower revenue barely covers ground rent, tower operating costs and a corporate overhead of about $50 to $55 million a year. The company also expects many towers to end up with no tenant, and under the T-Mobile agreement Array pays to take down equipment T-Mobile hands back. We treat the towers as a modest business: large cash for about a year from the interim leases, then about $20 million a year growing with the contractual rent escalators through the T-Mobile term to 2040, less about $50 million of decommissioning cost. That is worth about $250 million. Wireless partnerships. Array holds passive minority interests in mature wireless partnerships run mainly by Verizon and AT&T, including a 5.5% stake in the Los Angeles SMSA partnership. These have paid cash every year for well over a decade: roughly $145 to $190 million a year from 2016 to 2024. In 2025 they paid $215.6 million, but $67.8 million of that was one-time: $42.5 million from three Iowa partnerships that sold to T-Mobile, and $25.3 million from Verizon's tower sale. In our previous analysis we read the first half of 2026 as a decline of about a quarter. Most of that apparent drop is the 2025 one-time payment not repeating. Excluding it, first-half distributions were $66.6 million against $62.6 million a year earlier. The Los Angeles partnership is the weak spot: it paid $26.1 million against $34.3 million. After tax on the underlying earnings, we treat this stream as about $100 million a year, or about $1.15 per share. The base case holds it flat for ten years and then lets it shrink 2% a year for as long as the partnerships keep operating. That is worth about $1.43 billion. Nothing in the filings points to a new partnership being added, so no growth is credited. Remaining spectrum. About $1.58 billion of carrying value is left, mostly C-band licenses won at auction, plus the roughly $30 million of pending sales. Array no longer runs a network, so these licenses produce no cash until they are sold. All three national carriers have just paid around $1 billion each for Array spectrum, which is real evidence of demand. But C-band has a narrower set of buyers, and management says it will not be a forced seller. Earlier impairments ($136 million in 2024 and $48 million in 2025) show that carrying value is not guaranteed. The base case assumes the spectrum sells close to carrying value in about two and a half years, worth about $1.30 billion today. A small amount of value is also credited for the tax deduction on interest while the debt is outstanding. Debt. At June 30, 2026, Array had $689 million of debt. That is a $325 million CoBank term loan at SOFR plus 2.5%, due June 2030, plus $364 million of long-dated senior notes at 5.5% to 6.7%. The notes run to 2069 and 2070 and cost about our own long-term yardstick, so no adjustment is made for them. Cash was $416 million, but about $250 million of tax on the 2026 spectrum gains was due in the third quarter. After that tax, a working cash cushion and a small outside ownership interest, net debt is about $610 million. Partnership cash alone covers the roughly $45 million interest bill about three times over in every case, and the loan covenants (leverage under 3.5 times, interest cover over 3 times) are not close to binding. Cases. The base case adds towers ($250 million), partnerships ($1.43 billion), spectrum ($1.30 billion) and pending sales plus the interest tax deduction (about $110 million). That is about $3.09 billion of business value, less $610 million owed, which leaves $2.48 billion, or about $28.70 per share. The bear case is built from risks already visible: - The interim T-Mobile leases are cancelled quickly. - About 1,700 towers lose all tenants and must be decommissioned. - Partnership cash shrinks 5% a year, the pace suggested by the Los Angeles partnership's recent decline as the large carriers compete on price. - The C-band sells only after four years, at about 55% of carrying value. That gives about $1.60 billion of business value against the same $610 million owed, or about $11.50 per share. The bull case assumes: - The towers add tenants at the pace seen in the second quarter, when colocations rose by 72. - Partnership cash holds flat indefinitely. - The spectrum sells within two years at about 20% above carrying value, after tax on the gain. That gives about $3.86 billion of value, or about $37.55 per share. Wireless partnership cash is not tied to credit or commodity cycles. Even through 2008 to 2010, wireless spending held up. So the bear case uses steady competitive pressure rather than a recession as its downturn. The full-year 2025 cash flow mixes one-time sale effects (bonus payouts, deferred spectrum-lease revenue, tax timing) that we could not fully reconcile line by line. We did not use it as a measure of normal earnings; each asset is valued from its own contracts and record instead. Margin-of-safety price. We are fairly confident about the partnership cash, which has a long record, and about the debt, which is long-dated and well covered. We are not confident about what the C-band will fetch or when, and that is close to half the value. The worst plausible outcome no case fully captures is the controlling holder's position. TDS decides when and whether spectrum is sold and whether cash is paid out or retained. It could also return with a new buyout offer at a price public holders have no power to refuse, and the business pays no regular dividend in the meantime. If we are wrong on the two things most likely to go wrong, with the C-band fetching half its carrying value years from now and the Los Angeles partnership continuing to shrink, the shares are worth roughly $11 to $13. At $14, the after-tax partnership cash and the towers roughly pay for the debt and the price. That price would then value the C-band at well under half its carrying value. From that price, a spectrum sale near carrying value within about three years implies special dividends equivalent to about 20% a year, and a bear-case sale implies a modest loss. That is why the margin-of-safety price is $14.