Parker Hannifin (PH) posted record Aerospace Systems revenue of $1.71B in Q2 FY2026 with 13.5% organic growth and record 30.2% adjusted segment operating margin, while carrying a $11.70B backlog; W.W. Grainger (GWW) transformed into a multi-channel platform with its Endless Assortment segment delivering 19.7% reported sales growth in Q2 2025 after divesting Cromwell.

Parker Hannifin delivered a 10-year return of 854%, more than doubling the S&P 500’s 223% gain, while Grainger returned 437% over the same period, both driven by operational discipline and margin expansion rather than market hype.

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Parker Hannifin (NYSE: PH) makes motion and control systems for aircraft, factories, and industrial equipment. W.W. Grainger (NYSE: GWW) sells nuts, bolts, safety gear, and maintenance supplies to businesses. Neither has ever gone viral. Neither has a cult following. Yet while investors chased AI chips and meme stocks, these two quietly delivered decade-long returns most growth investors would envy.

Parker Hannifin's transformation is the more dramatic story. Its Aerospace Systems segment has become the company's crown jewel, posting record revenue of $1.71 billion in Q2 FY2026 with 13.5% organic growth, while the broader industrial business staged a gradual recovery. CEO Jenny Parmentier has leaned hard into margin expansion through the Win Strategy business system, and it's working. Adjusted segment operating margin hit a record 30.2% in Aerospace for Q2 FY2026, and the company carries a record $11.70 billion companywide backlog.

Grainger's story is a quieter pivot. The company transformed from a traditional industrial distributor into a multi-channel platform, with its Endless Assortment segment, anchored by MonotaRO in Japan and Zoro in the U.S., delivering 19.7% reported sales growth in Q2 2025. Grainger has also exited the U.K. market entirely by divesting Cromwell, absorbing a $196 million impairment charge in the process and refocusing capital where it earns better returns.

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Here's how a $1,000 investment would have performed at each horizon, price-return only, excluding dividends reinvested (which would push these figures higher for both Dividend Kings).

Parker Hannifin

1-Year Return: Initial $1,000 | Current Value: $1,469.80 | Total Return: +46.98% | S&P 500 same period: $1,162.10 (+16.21%)

5-Year Return: Initial $1,000 | Current Value: $3,137.00 | Total Return: +213.70% | S&P 500 same period: $1,691.20 (+69.12%)

10-Year Return: Initial $1,000 | Current Value: $9,535.20 | Total Return: +853.52% | S&P 500 same period: $3,226.60 (+222.66%)

W.W. Grainger

1-Year Return: Initial $1,000 | Current Value: $1,093.20 | Total Return: +9.32% | S&P 500 same period: $1,162.10 (+16.21%)

5-Year Return: Initial $1,000 | Current Value: $2,810.70 | Total Return: +181.07% | S&P 500 same period: $1,691.20 (+69.12%)

10-Year Return: Initial $1,000 | Current Value: $5,369.80 | Total Return: +436.98% | S&P 500 same period: $3,226.60 (+222.66%)

Parker Hannifin's 10-year return of nearly 854% is the standout, more than doubling the S&P 500's already strong decade. Both stocks beat the index convincingly over five years. The one-year picture splits: Parker Hannifin outpaced the market sharply while Grainger lagged, weighed down by the U.K. exit charge and tariff margin pressure. Dividend reinvestment would have added significantly. Parker Hannifin has raised dividends for 69 consecutive fiscal years, while Grainger has done so for 54 straight years.

Parker Hannifin's bull case is supported by aerospace demand and the Filtration Group acquisition integration. It rests on a record backlog, raised guidance of $30.40 to $31.00 in adjusted EPS for FY2026, and 73% of analysts rating the stock a Buy or Strong Buy. The risks are tariff exposure beyond the flagged $375 million annualized gross impact or softening aerospace OEM demand as the commercial aviation cycle matures.

On Grainger, the Endless Assortment growth story is real and 2026 margin recovery looks credible. Yet, with 14 of 21 analysts rating shares at Hold and tariff headwinds still working through inventory, near-term uncertainty remains higher than Parker Hannifin's, based on current analyst sentiment. For long-term investors, both remain textbook examples of compounding through consistency rather than excitement.

 

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