STEM vs GREE vs MARA vs FLUX vs GNRC

For growth investors, Marathon Digital Holdings, Inc.

(MARA) is the stronger pick with 38. 2% revenue growth year-over-year, versus -15. 4% for Greenidge Generation Holdings Inc. (GREE). Generac Holdings Inc. (GNRC) offers the better valuation at 99. 2x trailing P/E (30. 9x forward), making it the more compelling value choice. Analysts rate Marathon Digital Holdings, Inc. (MARA) a "Buy" — based on 19 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, Generac Holdings Inc.

(GNRC) delivered a total return of -18. 5%, compared to -99. 2% for Greenidge Generation Holdings Inc. (GREE). Over 10 years, the gap is even starker: GNRC returned +666. 1% versus STEM's -95. 5%. 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), Generac Holdings Inc.

(GNRC) is the lower-risk stock at 1. 69β versus Stem, Inc. 's 3. 66β — meaning STEM is approximately 116% more volatile than GNRC relative to the S&P 500. On balance sheet safety, Generac Holdings Inc. (GNRC) carries a lower debt/equity ratio of 51% versus 105% for Marathon Digital Holdings, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Marathon Digital Holdings, Inc.

(MARA) is pulling ahead at 38. 2% versus -15. 4% for Greenidge Generation Holdings Inc. (GREE). On earnings-per-share growth, the picture is similar: Stem, Inc. grew EPS 91. 3% year-over-year, compared to -314. 5% for Marathon Digital Holdings, Inc.. Over a 3-year CAGR, FLUX leads at 16. 2% 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.

Stem, Inc.

(STEM) is the more profitable company, earning 88. 2% net margin versus -144. 6% for Marathon Digital Holdings, Inc. — meaning it keeps 88. 2% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: GNRC leads at 6. 9% versus -90. 6% for MARA. At the gross margin level — before operating expenses — GREE leads at 79. 7%, 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.

Analyst consensus price targets imply the most upside for STEM: 137.

2% to $20. 67.

None of the stocks in this comparison currently pay a material dividend.

All are effectively zero-yield and should be held for capital appreciation rather than income.

For long-horizon retirement investors, Generac Holdings Inc.

(GNRC) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (+666. 1% 10Y return). Stem, Inc. (STEM) carries a higher beta of 3. 66 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (GNRC: +666. 1%, STEM: -95. 5%), 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 (STEM (Technology) and GREE (Financial Services) and MARA (Financial Services) and FLUX (Industrials) and GNRC (Industrials)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: STEM is a small-cap quality compounder stock; GREE is a small-cap quality compounder stock; MARA is a small-cap high-growth stock; FLUX is a small-cap quality compounder stock; GNRC is a mid-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.