RDNT vs SMID vs USLM vs ARLO vs MLM

For growth investors, Smith-Midland Corporation (SMID) is the stronger pick with 31.

8% revenue growth year-over-year, versus 0. 1% for Martin Marietta Materials, Inc. (MLM). United States Lime & Minerals, Inc. (USLM) offers the better valuation at 23. 4x trailing P/E (20. 1x forward), making it the more compelling value choice. Analysts rate RadNet, Inc. (RDNT) a "Buy" — based on 11 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.

On trailing P/E, United States Lime & Minerals, Inc.

(USLM) is the cheapest at 23. 4x versus Arlo Technologies, Inc. at 106. 4x. On forward P/E, Arlo Technologies, Inc. is actually cheaper at 18. 5x — notably different from the trailing picture, reflecting expected earnings growth. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: United States Lime & Minerals, Inc. wins at 0. 56x versus Martin Marietta Materials, Inc. 's 3. 00x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, United States Lime & Minerals, Inc.

(USLM) delivered a total return of +286. 0%, compared to +62. 5% for Martin Marietta Materials, Inc. (MLM). Over 10 years, the gap is even starker: SMID returned +1437% versus ARLO's -32. 6%. 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), Martin Marietta Materials, Inc.

(MLM) is the lower-risk stock at 0. 87β versus Smith-Midland Corporation's 1. 58β — meaning SMID is approximately 80% more volatile than MLM relative to the S&P 500. On balance sheet safety, United States Lime & Minerals, Inc. (USLM) carries a lower debt/equity ratio of 1% versus 137% for RadNet, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Smith-Midland Corporation (SMID) is pulling ahead at 31.

8% versus 0. 1% for Martin Marietta Materials, Inc. (MLM). On earnings-per-share growth, the picture is similar: Smith-Midland Corporation grew EPS 866. 7% year-over-year, compared to -768. 4% for RadNet, Inc.. Over a 3-year CAGR, USLM leads at 16. 4% 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.

United States Lime & Minerals, Inc.

(USLM) is the more profitable company, earning 36. 0% net margin versus 2. 3% for RadNet, Inc. — meaning it keeps 36. 0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: USLM leads at 42. 4% versus 1. 1% for ARLO. At the gross margin level — before operating expenses — USLM leads at 48. 8%, 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.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential.

By this metric, United States Lime & Minerals, Inc. (USLM) is the more undervalued stock at a PEG of 0. 56x versus Martin Marietta Materials, Inc. 's 3. 00x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, Arlo Technologies, Inc. (ARLO) trades at 18. 5x forward P/E versus 91. 8x for RadNet, Inc. — 73. 2x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for RDNT: 60. 0% to $92. 00.

In this comparison, MLM (0.

5% yield), USLM (0. 2% yield) pay a dividend. RDNT, SMID, ARLO do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Martin Marietta Materials, Inc.

(MLM) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 87), 0. 5% yield, +242. 7% 10Y return). Both have compounded well over 10 years (MLM: +242. 7%, ARLO: -32. 6%), 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 (RDNT (Healthcare) and SMID (Basic Materials) and USLM (Basic Materials) and ARLO (Industrials) and MLM (Basic Materials)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: RDNT is a small-cap quality compounder stock; SMID is a small-cap high-growth stock; USLM is a small-cap high-growth stock; ARLO is a small-cap quality compounder stock; MLM is a mid-cap quality compounder stock. MLM pays a dividend while RDNT, SMID, USLM, ARLO do not, making them suitable for different income and tax situations. 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.