ERII vs PUMP vs WTTR vs LBRT vs ACDC

For growth investors, Select Water Solutions, Inc.

(WTTR) is the stronger pick with -3. 1% revenue growth year-over-year, versus -12. 1% for ProPetro Holding Corp. (PUMP). Energy Recovery, Inc. (ERII) offers the better valuation at 22. 5x trailing P/E (22. 9x forward), making it the more compelling value choice. Analysts rate Energy Recovery, Inc. (ERII) a "Buy" — based on 16 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, Energy Recovery, Inc.

(ERII) is the cheapest at 22. 5x versus ProPetro Holding Corp. at 1993. 6x. On forward P/E, Energy Recovery, Inc. is actually cheaper at 22. 9x.

Over the past 5 years, Select Water Solutions, Inc.

(WTTR) delivered a total return of +158. 4%, compared to -63. 7% for ProFrac Holding Corp. (ACDC). Over 10 years, the gap is even starker: LBRT returned +94. 1% versus ACDC's -63. 7%. 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), ProFrac Holding Corp.

(ACDC) is the lower-risk stock at 0. 83β versus Energy Recovery, Inc. 's 1. 53β — meaning ERII is approximately 85% more volatile than ACDC relative to the S&P 500. On balance sheet safety, Energy Recovery, Inc. (ERII) carries a lower debt/equity ratio of 5% versus 130% for ProFrac Holding Corp. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Select Water Solutions, Inc.

(WTTR) is pulling ahead at -3. 1% versus -12. 1% for ProPetro Holding Corp. (PUMP). On earnings-per-share growth, the picture is similar: ProPetro Holding Corp. grew EPS 100. 6% year-over-year, compared to -66. 7% for ProFrac Holding Corp.. Over a 3-year CAGR, ERII leads at 2. 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.

Energy Recovery, Inc.

(ERII) is the more profitable company, earning 17. 0% net margin versus -19. 0% for ProFrac Holding Corp. — meaning it keeps 17. 0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: ERII leads at 18. 2% versus -6. 9% for ACDC. At the gross margin level — before operating expenses — ERII leads at 65. 2%, 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.

On forward earnings alone, Energy Recovery, Inc.

(ERII) trades at 22. 9x forward P/E versus 3480. 2x for Liberty Energy Inc. — 3457. 3x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for ERII: 37. 9% to $13. 00.

In this comparison, WTTR (1.

9% yield), LBRT (1. 0% yield) pay a dividend. ERII, PUMP, ACDC do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Select Water Solutions, Inc.

(WTTR) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 1. 09), 1. 9% yield). Energy Recovery, Inc. (ERII) carries a higher beta of 1. 53 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (WTTR: +26. 6%, ERII: -11. 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 (ERII (Industrials) and PUMP (Energy) and WTTR (Utilities) and LBRT (Energy) and ACDC (Energy)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

WTTR, LBRT pay a dividend while ERII, PUMP, ACDC 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.