GSAT vs IRDM: Which Is the Better Buy in 2026?

Same yardstick, side by side (as of August 2026). Valuation lined up like this is most meaningful for two names in the same corner of the market, which these are. Figures are approximate; verify before investing.

Reading it: IRDM is the cheaper of the two on forward earnings, but cheaper is not the same as better. Pair the valuation with growth (how far the forward P/E sits below the trailing P/E) and risk (beta) before you decide.

The metrics above tell you which is the marginally better business. The bigger risk for most people is not picking the slightly worse stock, it is over-concentrating. GSAT and IRDM share themes, so owning both, or adding either to what you already hold, can quietly push a large share of your portfolio into one bet.

This is the part a generic comparison page cannot answer, because it depends on what you own. Connect your brokerage and Walnut shows your real, combined GSAT and IRDM exposure, flags overlap with your existing positions, and tells you if adding one would tip you past a concentration you are comfortable with, read-only by default, with your login staying at your broker. Walnut is not an investment adviser.

Globalstar, Inc. is a satellite communications company that operates a low-earth-orbit satellite constellation and holds licensed wireless spectrum, most notably Band 53 (and its 5G variant n53) in the United States. Its business changed dramatically after it became the satellite operator supporting Apple's satellite-based features, including Emergency SOS, on iPhones. Under its partnership agreements, Apple funds a large share of new satellite and ground infrastructure and pays Globalstar for capacity and services, which turned a long-struggling company into one with fast-growing, more predictable revenue. Globalstar also pursues terrestrial uses of its spectrum, including private 5G networks through its XCOM RAN technology aimed at industrial and enterprise customers.

Full GSAT guide

Iridium Communications operates a constellation of 66 active low-earth-orbit satellites (plus in-orbit spares) that provides voice and data coverage across the entire planet, including the poles and oceans where terrestrial and geostationary networks fall short. Revenue comes from recurring satellite service (about 72% of the total), plus equipment sales, engineering, and support. Commercial IoT and a long-running U.S. government airtime contract are the backbone of the subscriber base, which reached roughly 2.56 million billable subscribers in early 2026. The U.S. government generated about 29% of 2025 revenue.

Full IRDM guide

Both fit overlapping themes, but they are not interchangeable. The useful comparison is which set of drivers and risks you want exposure to.

• GSAT drivers: The pending Amazon acquisition; The Apple partnership.
• IRDM drivers: Pending Rocket Lab acquisition; Recurring service revenue and IoT.

A faster-growing, richer-valued name usually swings harder, so it suits a longer horizon and a higher tolerance for volatility; a steadier, more cash-generative business suits a more conservative or income-minded investor. The honest test is which set of risks you could hold through a drawdown: The central risk is deal risk: GSAT's price is tied to Amazon's pending acquisition closing near $90 per share, and if the deal is delayed, repriced, or blocked by regulators, the stock could fall toward its standalone value. For IRDM, the dominant risk is deal risk: a pending acquisition can be delayed, repriced, or fail regulatory review, and the stock could fall back toward standalone value if the transaction breaks.

Growth-minded investors who believe the theme has years to run tend to accept the richer multiple for more upside; value-minded investors lean toward the cheaper forward earnings and steadier profile. Pick GSAT if you believe its drivers more; IRDM if you believe its. Many investors hold both, but since they share themes, that is a concentrated bet, not diversification. Decide deliberately and check overlap. For the full detail, see the GSAT and IRDM guides.

GSAT. Figures are approximate, tied to the Jul 2026 as-of date, and reflect the announced Amazon merger and Q1 2026 reporting; verify live numbers and deal status before acting. Because GSAT trades mainly on the Amazon transaction, conventional valuation multiples matter less than the spread between the current price and the roughly $90 offer, the probability of the deal closing, and the expected timing into 2027. Always confirm the latest deal terms and price directly.

IRDM. Iridium trades near the pending Rocket Lab deal value, with a market cap around $5.3 billion against roughly $875 million of annual revenue and about $440-490 million of EBITDA. Trailing valuation multiples (P/E near 50, EV/EBITDA around 16) look rich for a low-growth operator, which is part of why the market has anchored to the takeover terms. Net leverage of about 3.4 times EBITDA and roughly $1.76 billion of debt are relevant to the enterprise value.

Headline figures (approximate, Jul 2026): GSAT shows situation Trades as a merger-arbitrage play on Amazon's pending acquisition, announced deal value ~$10.9 billion; roughly $90 per share in cash or Amazon stock (April 2026 agreement), expected close 2027, subject to regulatory approval and deal conditions, revenue Growing; ~$70.1 million in Q1 2026, up ~17% year over year; IRDM shows revenue (2025 / ttm) ~$875M, q1 2026 revenue ~$219M (up ~2% YoY), service revenue share ~72% of total, 2026 oebitda guidance ~$480-490M.

GSAT and IRDM are related but distinct: same themes, different businesses and risks. Neither wins in the abstract; the right pick is whichever thesis you actually believe, sized so you are not over-concentrated in one theme. Walnut can show your combined GSAT and IRDM exposure against your real portfolio. It is not an investment adviser.