FLY vs ASTS vs MNTS vs SPCE

For growth investors, AST SpaceMobile, Inc.

(ASTS) is the stronger pick with 1505% revenue growth year-over-year, versus -31. 6% for Momentus Inc. (MNTS). Analysts rate Firefly Aerospace Inc. (FLY) a "Buy" — based on 7 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

Over the past 5 years, AST SpaceMobile, Inc.

(ASTS) delivered a total return of +892. 7%, compared to -99. 9% for Momentus Inc. (MNTS). Over 10 years, the gap is even starker: ASTS returned +646. 8% versus MNTS's -99. 9%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), Virgin Galactic Holdings, Inc.

(SPCE) is the lower-risk stock at 2. 03β versus Momentus Inc. 's 3. 65β — meaning MNTS is approximately 80% more volatile than SPCE relative to the S&P 500. On balance sheet safety, Firefly Aerospace Inc. (FLY) carries a lower debt/equity ratio of 26% versus 130% for Virgin Galactic Holdings, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), AST SpaceMobile, Inc.

(ASTS) is pulling ahead at 1505% versus -31. 6% for Momentus Inc. (MNTS). On earnings-per-share growth, the picture is similar: Momentus Inc. grew EPS 90. 0% year-over-year, compared to -161. 0% for Firefly Aerospace Inc.. Over a 3-year CAGR, MNTS leads at 85. 7% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Firefly Aerospace Inc.

(FLY) is the more profitable company, earning -186. 6% net margin versus -49. 3% for Virgin Galactic Holdings, Inc. — meaning it keeps -186. 6% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: FLY leads at -154. 3% versus -53. 5% for SPCE. At the gross margin level — before operating expenses — MNTS leads at 96. 9%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

In this comparison, FLY (0.

2% yield) pays a dividend. ASTS, MNTS, SPCE do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, AST SpaceMobile, Inc.

(ASTS) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (+646. 8% 10Y return). Momentus Inc. (MNTS) carries a higher beta of 3. 65 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (ASTS: +646. 8%, MNTS: -99. 9%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

These companies operate in different sectors (FLY (Industrials) and ASTS (Technology) and MNTS (Industrials) and SPCE (Industrials)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: FLY is a small-cap high-growth stock; ASTS is a mid-cap high-growth stock; MNTS is a small-cap quality compounder stock; SPCE is a small-cap quality compounder stock. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.