Ultra Clean Holdings (STU:UCE) Cyclically Adjusted PB Ratio: (As of Sep. 21, 2026)

Author: Vera Yuan 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
Charlie Tian
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.

STU:UCE Ultra Clean Holdings Inc STU:UCE
74 GF Score
Price €61.34
GF Value €36.30
Valuation Significantly Overvalued
! 6 Warning Signs
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What is Ultra Clean Holdings Cyclically Adjusted PB Ratio?

Shiller PE for Stocks: The True Measure of Stock Valuation


Ultra Clean Holdings  (STU:UCE) 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.


Ultra Clean Holdings Cyclically Adjusted PB Ratio Related Terms


Ultra Clean Holdings Cyclically Adjusted PB Ratio Historical Data

* Premium members only.

The historical data trend for Ultra Clean Holdings'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.

Ultra Clean Holdings Cyclically Adjusted PB Ratio Chart

Ultra Clean Holdings 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 5.54 2.74 2.45 2.41 1.41

Ultra Clean Holdings 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 1.31 1.53 1.45 3.45 7.31

STU:UCE vs AMBA, IPGP, ACLS: Cyclically Adjusted PB Ratio Comparison

For the Semiconductor Equipment & Materials subindustry, Ultra Clean Holdings'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.


Ultra Clean Holdings Cyclically Adjusted PB Ratio vs Semiconductors Industry

For the Semiconductors industry and Technology sector, Ultra Clean Holdings's Cyclically Adjusted PB Ratio distribution charts can be found below:

* The bar in red indicates where Ultra Clean Holdings's Cyclically Adjusted PB Ratio falls into.


STU:UCE
74GF Score
Ultra Clean Holdings Inc STU:UCE
Cyclically Adjusted PB Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
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Ultra Clean Holdings 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.

Ultra Clean Holdings's Cyclically Adjusted Book per Share for the quarter that ended in Jun. 2026 is calculated as:

For example, Ultra Clean Holdings'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)
=13.846/333.9520*333.9520
=13.846

Current CPI (Jun. 2026) = 333.9520.

Ultra Clean Holdings Quarterly Data

Book Value per Share CPI Adj_Book
201609 5.540 241.428 7.663
201612 6.218 241.432 8.601
201703 6.601 243.801 9.042
201706 6.776 244.955 9.238
201709 6.960 246.819 9.417
201712 7.429 246.524 10.064
201803 8.949 249.554 11.976
201806 9.818 251.989 13.011
201809 10.017 252.439 13.252
201812 10.257 251.233 13.634
201903 10.441 254.202 13.717
201906 10.250 256.143 13.364
201909 10.690 256.759 13.904
201912 10.257 256.974 13.330
202003 10.732 258.115 13.885
202006 10.786 257.797 13.972
202009 11.082 260.280 14.219
202012 11.262 260.474 14.439
202103 12.084 264.877 15.235
202106 14.878 271.696 18.287
202109 16.148 274.310 19.659
202112 17.470 278.802 20.926
202203 18.500 287.504 21.489
202206 18.867 296.311 21.264
202209 20.283 296.808 22.821
202212 19.424 296.797 21.856
202303 19.004 301.836 21.026
202306 18.540 305.109 20.293
202309 18.871 307.789 20.475
202312 18.211 306.746 19.826
202403 18.458 312.332 19.736
202406 18.904 314.175 20.094
202409 18.326 315.301 19.410
202412 20.038 315.605 21.203
202503 19.229 319.799 20.080
202506 14.853 322.561 15.378
202509 14.646 324.800 15.059
202512 14.673 324.054 15.121
202603 13.602 330.213 13.756
202606 13.846 333.952 13.846

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 Ultra Clean Holdings (STU:UCE) Overvalued in 2026?

Based on GuruFocus' analysis, Ultra Clean Holdings stock appears to be overvalued. The current stock price of €61.34 is trading 69% above its estimated GF Value™ of €36.30. GuruFocus considers Ultra Clean Holdings to be Significantly Overvalued.

Key valuation signals for STU:UCE:

  • Cyclically Adjusted PB Ratio:
  • GF Value™: €36.30 vs. price of €61.34 (69% above fair value)
  • GF Score™: 74/100 with 6 warning signs

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


Ultra Clean Holdings Business Description

Other Exchanges UCTT:USA0LID:UKUCE:Germany
Address 26462 Corporate Avenue, Hayward, CA, USA, 94545
Ultra Clean Holdings Inc, through its subsidiaries, manufactures and supplies production tools, modules, and subsystems for the semiconductor capital equipment industry. The product includes precision robotic solutions, gas delivery systems, and a variety of industrial and automation production equipment products; subsystems include wafer cleaning subsystems, chemical delivery modules, top-plate assemblies, frame assemblies, and process modules. Its customer base includes firms in the semiconductor capital equipment industry, medical, energy, industrial, flat panel, and research equipment industries. It has two segments: Products and Services. Its principal markets are the Americas, Asia Pacific, and EMEA.
74GF Score

Get the complete analysis for STU:UCE

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

€61.34
Price
€36.30
GF Value