TDS Q2 2026: Record Fiber Adds Hide a Legacy Revenue Trap

TDS Q2 2026: Fiber momentum is real, but legacy drag still defines the quarter

TDS' second quarter looked strong on fiber, weaker on legacy economics. The company delivered 66,000 fiber service addresses in Q2, added 15,100 residential fiber customers (up 47% year over year), and raised its 2026 fiber build target. But it also lowered 2026 revenue guidance to $1.0 billion-$1.025 billion and narrowed adjusted EBITDA guidance to $310 million-$330 million.

That is the quarter's main tension. Fiber revenue grew 13%, which is meaningful. At the same time, copper and cable declines, divestitures, and broader legacy revenue pressure continued. The footprint is expanding, but the old revenue base is still slipping.

Management also raised 2026 telecom capital expenditure guidance to $625 million-$675 million, so this remains a capital-intensive build phase. Array's prior spectrum monetization progress helps, but it buys time rather than fully solving the transition. Until fiber cash flow does more than grow on a percentage basis, TDS still looks like a company funding new growth with a shrinking legacy engine.

Why the bull case still has room to work

The bullish case is not about one strong quarter. It is about a multi-quarter rollout window that can keep compounding before the market fully reflects it.

Array consolidation could keep mattering

TDS is advancing an all-stock proposal to acquire Array's remaining 18.1% minority interest. The proposal would exchange each Array share for 0.86 TDS shares and is conditioned on a payout of about $10.40 per Array share in dividends from spectrum sales, or roughly $900 million total. If completed, the move would give TDS a cleaner claim on a platform that already produced $1 billion Verizon spectrum transaction and $168 million T-Mobile sale progress.

Granite State adds ready-made fiber assets

TDS also announced an agreement to acquire Granite State Communications, adding more than 11,000 fully fibered addresses in New Hampshire, with an expected third-quarter close pending approval. That is different from waiting for greenfield build to convert into revenue.

Earlier this year, TDS said it delivered 40,000 marketable fiber service addresses in one quarter, its best first-quarter total on record, while targeting 200,000 to 250,000 new fiber addresses in 2026. Add in Q2's 66,000 fiber service addresses, and the footprint is still expanding quickly.

The bullish case is still incomplete

This is the useful part of the debate. Bulls are right that TDS is still in acquisition and build mode while monetization continues. But those gains do not fully offset the legacy drag yet. In the first quarter, TDS said residential revenue declined $5 million due to divestitures and cable/copper pressures, even as fiber revenue increased 13% and provided an $11 million uplift. The good news is stronger than the headline decline, but not strong enough yet to fully replace it.

That leaves the next few quarters as the real test. If revenue conversion begins to outrun legacy erosion, the stock could start to be valued more like an expanding fiber platform than a legacy carrier in transition.

What matters most in the next few quarters

The next update does not need another pretty adds headline. It needs proof that the build can stay funded long enough for fiber to do more than grow on a percentage basis.

Key signals to watch

• Any update on the offer to acquire Array's minority shares.
• Whether the Granite State Communications acquisition closes on the expected third-quarter timeline.
• Whether the lowered 2026 revenue guidance and narrowed adjusted EBITDA guidance stabilize rather than keep compressing.

What would strengthen the bull case

• A clean Granite State close, which would add already-fibered assets faster than greenfield build.
• More progress pulling Array value closer to TDS through the proposed dividend structure tied to spectrum monetization.
• Evidence that higher capex is not overwhelming returns.

What would weaken it

• Another cut to 2026 revenue guidance or adjusted EBITDA guidance.
• Rising capex without clearer cash-flow support.
• More delay in the Array structure while the market continues to discount outside value.

The core view remains simple: TDS has a real fiber buildout going on, but the investment case gets stronger only when the old business stops pulling as hard in the other direction.