O'Reilly Automotive (HAM:OM6) Cyclically Adjusted PB Ratio: (As of Aug. 06, 2026)

Author: Vera Yuan Vera Yuan
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Director of Data and Quant Analytics at GuruFocus
Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
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Charlie Tian
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Founder & CEO of GuruFocus
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.

HAM:OM6 O'Reilly Automotive Inc HAM:OM6
87 GF Score
Price €80.16
GF Value €83.09
! 3 Warning Signs
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What is O'Reilly Automotive Cyclically Adjusted PB Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


O'Reilly Automotive  (HAM:OM6) Cyclically Adjusted PB Ratio Explanation

Compared with the regular PB Ratio, which works poorly for cyclical businesses, the Cyclically Adjusted PB Ratio smoothed out the fluctuations of book value during business cycles. Therefore it is more accurate in reflecting the valuation of the company.

If a company has consistent business performance, the Cyclically Adjusted PB Ratio should give similar results to regular PB Ratio.


O'Reilly Automotive Cyclically Adjusted PB Ratio Related Terms


O'Reilly Automotive Cyclically Adjusted PB Ratio Historical Data

* Premium members only.

The historical data trend for O'Reilly Automotive's Cyclically Adjusted PB Ratio can be seen below:

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

O'Reilly Automotive Cyclically Adjusted PB Ratio Chart

O'Reilly Automotive Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Cyclically Adjusted PB Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 49.34 75.95 153.00 960.50 0.00

O'Reilly Automotive Quarterly Data
Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26 Jun26
Cyclically Adjusted PB Ratio Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 0.00 0.00 0.00 0.00 0.00

HAM:OM6 vs AZO, GPC, BWA: Cyclically Adjusted PB Ratio Comparison

For the Auto Parts subindustry, O'Reilly Automotive's Cyclically Adjusted PB Ratio, along with its competitors' market caps and Cyclically Adjusted PB Ratio data, can be viewed below:

* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.


O'Reilly Automotive Cyclically Adjusted PB Ratio vs Vehicles & Parts Industry

For the Vehicles & Parts industry and Consumer Cyclical sector, O'Reilly Automotive's Cyclically Adjusted PB Ratio distribution charts can be found below:

* The bar in red indicates where O'Reilly Automotive's Cyclically Adjusted PB Ratio falls into.


HAM:OM6
87GF Score
O'Reilly Automotive Inc HAM:OM6
Cyclically Adjusted PB Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

O'Reilly Automotive Cyclically Adjusted PB Ratio Calculation

Like the Shiller PE Ratio, the Cyclically Adjusted PB Ratio takes the Book Value per Share from the past 10 years, adjusts it for inflation, and then calculates the average. This average is then used for the P/B calculation. Because it considers this 10-year average, it's often referred to as the CAPB Ratio.

The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The similar calculation is applied by GuruFocus to calculate the Cyclically Adjusted PB Ratio.

O'Reilly Automotive's Cyclically Adjusted Book per Share for the quarter that ended in Jun. 2026 is calculated as:

For example, O'Reilly Automotive's adjusted Book Value per Share data for the three months ended in Jun. 2026 was:

Adj_Book=Book Value per Share/CPI of Jun. 2026 (Change)*Current CPI (Jun. 2026)
=-1.952/333.9520*333.9520
=-1.952

Current CPI (Jun. 2026) = 333.9520.

O'Reilly Automotive Quarterly Data

Book Value per Share CPI Adj_Book
201609 1.192 241.428 1.649
201612 1.108 241.432 1.533
201703 0.971 243.801 1.330
201706 0.586 244.955 0.799
201709 0.403 246.819 0.545
201712 0.436 246.524 0.591
201803 0.279 249.554 0.373
201806 0.271 251.989 0.359
201809 0.354 252.439 0.468
201812 0.262 251.233 0.348
201903 0.281 254.202 0.369
201906 0.111 256.143 0.145
201909 0.133 256.759 0.173
201912 0.315 256.974 0.409
202003 0.089 258.115 0.115
202006 0.471 257.797 0.610
202009 0.548 260.280 0.703
202012 0.108 260.474 0.138
202103 -0.006 264.877 -0.008
202106 0.174 271.696 0.214
202109 -0.118 274.310 -0.144
202112 -0.058 278.802 -0.069
202203 -0.301 287.504 -0.350
202206 -1.096 296.311 -1.235
202209 -1.293 296.808 -1.455
202212 -1.071 296.797 -1.205
202303 -1.658 301.836 -1.834
202306 -1.658 305.109 -1.815
202309 -1.844 307.789 -2.001
202312 -1.800 306.746 -1.960
202403 -1.447 312.332 -1.547
202406 -1.684 314.175 -1.790
202409 -1.494 315.301 -1.582
202412 -1.518 315.605 -1.606
202503 -1.466 319.799 -1.531
202506 -1.256 322.561 -1.300
202509 -0.900 324.800 -0.925
202512 -0.774 324.054 -0.798
202603 -1.109 330.213 -1.122
202606 -1.952 333.952 -1.952

Add all the adjusted book value per share together and divide the count will get our Cyclically Adjusted Book per Share.

Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.

Is O'Reilly Automotive (HAM:OM6) Overvalued in 2026?

Based on GuruFocus' analysis, O'Reilly Automotive stock appears to be undervalued. The current stock price of €80.16 is trading 3.5% below its estimated GF Value™ of €83.09.

Key valuation signals for HAM:OM6:

  • Cyclically Adjusted PB Ratio:
  • GF Value™: €83.09 vs. price of €80.16 (3.5% below fair value)
  • GF Score™: 87/100 with 3 warning signs

No single metric tells the full story. See the HAM:OM6 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


O'Reilly Automotive Business Description

Address 233 South Patterson Avenue, Springfield, MO, USA, 65802
Founded in 1957, O'Reilly Auto Parts is one of the largest specialty retailers of automotive aftermarket parts, tools, supplies, equipment, and accessories, serving both DIY and professional customers. The company operates nearly 6,600 stores across 48 US states, Puerto Rico, Mexico, and Canada. In fiscal 2025, O'Reilly generated nearly $18 billion in sales, with its dual market strategy yielding a balanced revenue mix, split between retail DIY customers (49%) and professional service orders (49%). The balance of its sales is derived from noncore categories, including wholesale distribution to independent parts distributors, heavy-shop equipment sales, and value-added services.
87GF Score

Get the complete analysis for HAM:OM6

Cyclically Adjusted PB Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€80.16
Price
€83.09
GF Value