Firefly Aerospace vs. SpaceX: Which Space Stock Can Put Your Portfolio Into Orbit in 2026?

The modern space race is no longer just between nations, as private companies now compete for orbital dominance. Choosing between Firefly Aerospace (NASDAQ:FLY) and SpaceX -- Space Exploration Technologies (NASDAQ:SPCX)-- depends on your appetite for risk.

Firefly focuses on small- to medium-lift vehicles and lunar services, positioning itself as a flexible partner for government agencies. SpaceX operates on a much larger scale, leveraging reusable rockets and its global Starlink internet service. While both firms aim for the stars, their financial paths and market valuations differ significantly for investors in 2026.

The case for Firefly Aerospace

Firefly Aerospace operates in the aerospace market, competing among defense stocks for government contracts. It focuses on the Alpha rocket for small-satellite launches and the Eclipse lunar lander for moon missions. Key customers include NASA and the U.S. Space Force, and such customer concentration adds a layer of risk to the business. The company maintains a backlog of approximately $1.4 billion and has long-term agreements with Lockheed Martin Corp (NYSE:LMT) and Northrop Grumman Corp (NYSE:NOC).

In FY 2025, revenue reached nearly $159.9 million, representing a significant increase of 163% compared to the previous year. Despite this rapid growth, the company reported a net loss of approximately $298.3 million for the same period, as the company continues to invest heavily in its flight hardware and testing facilities.

As of its December 2025 balance sheet, the debt-to-equity ratio was roughly 0.3x. This ratio measures total debt relative to shareholders' equity, with lower ratios generally indicating less reliance on borrowed money. The so-called current ratio, which compares short-term assets to liabilities, was a strong 4.5x. For the FY 2025 period, free cash flow was nearly negative $237.8 million, calculated by subtracting capital expenditures from cash from operations.

The case for Space Exploration Technologies

SpaceX provides orbital launch services and global satellite internet through its Starlink constellation. The company operates the Falcon 9 and Falcon Heavy rockets and is currently developing the Starship vehicle for deep-space exploration. By March 2026, Starlink reached roughly 10.3 million subscribers across 164 countries. The company serves launch, human spaceflight, and global broadband markets, though it does not disclose specific customer names in its latest annual report filed for the 2025 period.

In FY 2025, revenue reached about $18.7 billion, representing approximately 33% growth over the prior year. However, the company reported a net loss of nearly $4.9 billion for the fiscal year, resulting in a negative net margin of roughly 26.4%. This performance followed a profitable FY 2024, during which the company earned net income of about $791.0 million, highlighting the high costs associated with its current expansion phase.

As of its December 2025 balance sheet, the debt-to-equity ratio was approximately 0.6x. Its current ratio stood at roughly 1.4x, suggesting the company has enough liquid assets to cover its short-term obligations. Free cash flow for the FY 2025 period was nearly negative $14.0 billion. Note that stock-based compensation (SBC) accounted for roughly 29% of operating cash flow, inflating reported cash generation, since SBC is a non-cash expense added back in the cash flow statement.

Risk profile comparison

Firefly Aerospace faces a federal securities fraud class action lawsuit regarding its public disclosures, which creates ongoing legal and reputational risks. The company also deals with significant operational losses as it develops the Alpha and Eclipse vehicles. Future growth is tied to government budget appropriations and shifting spending priorities. Any disruption in federal funding or trade policy changes could materially affect its ability to execute on its current backlog.

SpaceX operates in a capital-intensive industry where any launch failure can lead to significant financial damage. The company faces increasing competition from established aerospace giants like Northrop Grumman and Lockheed Martin. Regulatory scrutiny regarding satellite constellations and orbital debris could also impact the expansion of the Starlink network. Maintaining high growth while managing the massive capital expenditures required for Starship remains a primary hurdle for the business.

Valuation comparison

Firefly appears cheaper than SpaceX as it trades at a lower multiple of sales, known as the P/S ratio. It does not have a future earnings estimates, called Forward P/E, because it is not expected to turn a profit in its coming fiscal year.

Valuation metrics sourced from Financial Modeling Prep (FMP) and may differ from other data providers.

Which stock would I buy in 2026?

SpaceX's various businesses intend to leverage the company's core launch capabilities, starting with reusable rockets. The ability to reuse boosters significantly lowers per-launch costs and spreads fixed manufacturing costs across multiple missions. Expectations are that scaling up quickly will happen, with Wall Street analysts projecting $39 billion in sales for fiscal 2026, a much lower net loss of around $1.6 billion, and profitability in 2027.

The lack of free cash flow appears to be crushing; projections indicate free cash flow will be negative $28 billion this year, then jump to negative $67 billion in 2027.

Still, the success of Tesla Inc (NASDAQ:TSLA) has made founder Elon Musk the richest man in the world and raised expectations that he can make an even greater fortune from SpaceX. The business certainly has market support behind it, raising the world's largest IPO, $85.7 billion this year.

Space has a very real business in Starlink, which mitigates the possibility that grander plans won't come to fruition.

Firefly went public in an initial public offering a year ago at $45 a share. Shares have spent much of the past year below that mark, reflecting typical post-IPO volatility.

More important is the company's recent business success. Firefly Aerospace is the only private company to achieve a successful lunar landing, doing so in March 2025 with its Blue Ghost Mission I. The success of that effort has ingratiated Firefly with NASA, which sent 10 payloads to the Moon with last year's mission. The company now plans annual missions to the Moon to deliver payloads for NASA as part of the agency's goal of constructing a permanent lunar base. Exciting stuff, and considering the attention the SpaceX IPO has been bringing to space businesses, that can only be another positive for Firefly.

While future projections are inherently speculative, Wall Street analysts expect Firefly to top $440 million this year and reach $1 billion in annual revenue in its fiscal 2028.

Both are exciting space businesses. The more honed focus of Firefly Aerospace is an advantage, as is its lower (though still expensive compared to all stocks) P/S ratio. One of the keys to good investing is to buy good companies at reasonable prices. Right now, Firefly presents as a stock more likely to pay off for investors over the long-term given its P/S ratio.

Brendan Coffey has no position in any of the stocks mentioned. The Motley Fool has positions in and recommends Firefly Aerospace, Lockheed Martin, and Tesla. The Motley Fool has a disclosure policy.