OK Biotech Co (TPE:4155) E10: NT$1.25 (As of Dec. 2025)


TPE:4155 OK Biotech Co Ltd TPE:4155
61 GF Score
Price NT$14.45
GF Value NT$27.27
Valuation Possible Value Trap
! 7 Warning Signs
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What is OK Biotech Co E10?

OK Biotech Co TPE:4155 -3.67% 61 E10 is NT$1.25 as of Dec. 2025. GuruFocus rates TPE:4155 with a GF Score™ of 61/100 and a GF Value™ of NT$27.27 (Possible Value Trap). The stock has 7 warning signs investors should review.

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller P/E calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years.

OK Biotech Co's adjusted earnings per share data for the three months ended in Dec. 2025 was NT$0.370. Add all the adjusted EPS for the past 10 years together and divide 10 will get our e10, which is NT$1.25 for the trailing ten years ended in Dec. 2025.

During the past 12 months, OK Biotech Co's average E10 Growth Rate was -3.10% per year. During the past 3 years, the average E10 Growth Rate was -5.30% per year. Please click Growth Rate Calculation Example (GuruFocus) to see how GuruFocus calculates Wal-Mart Stores Inc (WMT)'s revenue growth rate. You can apply the same method to get the E10 growth rate using E10 data.

During the past 13 years, the highest 3-Year average E10 Growth Rate of OK Biotech Co was -5.30% per year. The lowest was -5.30% per year. And the median was -5.30% per year.

As of today (2026-06-28), OK Biotech Co's current stock price is NT$14.45. OK Biotech Co's E10 for the quarter that ended in Dec. 2025 was NT$1.25. OK Biotech Co's Shiller PE Ratio of today is 11.56.

During the past 13 years, the highest Shiller PE Ratio of OK Biotech Co was 24.37. The lowest was 10.40. And the median was 17.28.


OK Biotech Co  (TPE:4155) E10 Explanation

If a company grows much fast than inflation, E10 may underestimate the company's earnings power. Shiller PE Ratio can seem to be too high even the actual P/E is low.

For the Shiller P/E, the earnings of the past 10 years are inflation-adjusted and averaged. The result is used for P/E calculation. Since it looks at the average over the last 10 years, the Shiller P/E is also called PE10.

The Shiller P/E was first used by professor Robert Shiller to measure the valuation of the overall market. The same calculation is applied here to individual companies.

OK Biotech Co's Shiller P/E Ratio of today is calculated as

Shiller PE Ratio=Share Price/E10
=14.45/1.25
=11.56

* 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.

During the past 13 years, the highest Shiller P/E Ratio of OK Biotech Co was 24.37. The lowest was 10.40. And the median was 17.28.


Be Aware

Shiller PE Ratio works better for cyclical companies. It gives you a better idea on the company's real earnings power.


OK Biotech Co E10 Related Terms


OK Biotech Co E10 Historical Data

* Premium members only.

The historical data trend for OK Biotech Co's E10 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.

OK Biotech Co E10 Chart

OK Biotech Co Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
E10
Get a 7-Day Free Trial Premium Member Only Premium Member Only 0.00 1.47 1.34 1.29 1.25

OK Biotech Co Quarterly Data
Mar21 Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25
E10 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 1.29 1.29 1.21 1.25 1.25

TPE:4155 vs ABT, SYK, MDT: E10 Comparison

For the Medical Devices subindustry, OK Biotech Co's Shiller PE Ratio, along with its competitors' market caps and Shiller PE 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.


OK Biotech Co Shiller PE Ratio vs Medical Devices & Instruments Industry

For the Medical Devices & Instruments industry and Healthcare sector, OK Biotech Co's Shiller PE Ratio distribution charts can be found below:

* The bar in red indicates where OK Biotech Co's Shiller PE Ratio falls into.


TPE:4155
61GF Score
OK Biotech Co Ltd TPE:4155
E10 is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

OK Biotech Co E10 Calculation

E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller P/E calculation. When we calculate the today's Shiller P/E ratio of a stock, we use today's price divided by E10.

What is E10? How do we calculate E10?

E10 is the average of the inflation adjusted earnings of a company over the past 10 years. Let's use an example to explain.

If we want to calculate the E10 of Wal-Mart (WMT) for Dec. 31, 2010, we need to have the inflation data and the earnings from 2001 through 2010.

We adjusted the earnings of 2001 earnings data with the total inflation from 2001 through 2010 to the equivalent earnings in 2010. If the total inflation from 2001 to 2010 is 40%, and Wal-Mart earned $1 a share in 2001, then the 2001's equivalent earnings in 2010 is $1.4 a share. If Wal-Mart earns $1 again in 2002, and the total inflation from 2002 through 2010 is 35%, then the equivalent 2002 earnings in 2010 is $1.35. So on and so forth, you get the equivalent earnings of past 10 years. Then you add them together and divided the sum by 10 to get E10.

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.

For example, OK Biotech Co's adjusted earnings per share data for the three months ended in Dec. 2025 was:

Adj_EPS= Earnings per Share (Diluted) /CPI of Dec. 2025 (Change)*Current CPI (Dec. 2025)
=0.37/324.0540*324.0540
=0.370

Current CPI (Dec. 2025) = 324.0540.

OK Biotech Co Quarterly Data

per share eps CPI Adj_EPS
201603 0.496 238.132 0.675
201606 0.362 241.018 0.487
201609 0.050 241.428 0.067
201612 0.219 241.432 0.294
201703 0.345 243.801 0.459
201706 0.420 244.955 0.556
201709 0.511 246.819 0.671
201712 0.329 246.524 0.432
201803 0.494 249.554 0.641
201806 0.338 251.989 0.435
201809 0.546 252.439 0.701
201812 0.468 251.233 0.604
201903 0.329 254.202 0.419
201906 0.301 256.143 0.381
201909 0.417 256.759 0.526
201912 0.390 256.974 0.492
202003 0.505 258.115 0.634
202006 0.222 257.797 0.279
202009 0.257 260.280 0.320
202012 0.310 260.474 0.386
202103 0.266 264.877 0.325
202106 -0.002 271.696 -0.002
202109 0.133 274.310 0.157
202112 -0.018 278.802 -0.021
202203 0.390 287.504 0.440
202206 0.461 296.311 0.504
202209 0.390 296.808 0.426
202212 -0.050 296.797 -0.055
202303 0.150 301.836 0.161
202306 0.120 305.109 0.127
202309 0.010 307.789 0.011
202312 -0.230 306.746 -0.243
202403 0.240 312.332 0.249
202406 0.290 314.175 0.299
202409 -0.170 315.301 -0.175
202412 0.270 315.605 0.277
202503 0.170 319.799 0.172
202506 -0.570 322.561 -0.573
202509 0.590 324.800 0.589
202512 0.370 324.054 0.370

Add all the adjusted EPS together and divide 10 will get our e10.

Frequently Asked Questions Learn more about E10 →
What does a E10 of NT$1.25 mean?
OK Biotech Co (TPE:4155) has a E10 of NT$1.25 as of Dec. 2025. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on OK Biotech Co and its competitors.
Is OK Biotech Co's E10 too high?
OK Biotech Co's current E10 is NT$1.25. Overall, OK Biotech Co has a GF Score™ of 61/100 and is considered Possible Value Trap, reflecting its overall financial health beyond just this single metric.
How does OK Biotech Co's E10 compare to ABT and SYK?
OK Biotech Co's E10 of NT$1.25 can be compared against companies in the Medical Devices & Instruments industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good E10 for a Medical Devices & Instruments company?
A good E10 depends on the Medical Devices & Instruments industry context. However, E10 should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high E10 mean?
A high E10 can signal that a stock is expensive relative to its fundamentals. E10 represents the company's inflation-adjusted earnings per share over a 10-year period. View historical data on OK Biotech Co and its competitors. OK Biotech Co's current E10 is NT$1.25. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is OK Biotech Co stock overvalued right now?
Based on GuruFocus' analysis, OK Biotech Co (TPE:4155) is currently considered Possible Value Trap. The stock's GF Value™ is NT$27.27, compared to a current price of NT$14.45 — trading 47% below its estimated fair value. The current E10 is NT$1.25. OK Biotech Co's overall GF Score™ is 61/100 with 7 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is E10 calculated?
E10 is calculated from a company's financial statements. For OK Biotech Co (TPE:4155), the current E10 is NT$1.25 as of Dec. 2025. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.

Is OK Biotech Co (TPE:4155) Overvalued in 2026?

Based on GuruFocus' analysis, OK Biotech Co stock appears to be undervalued. The current stock price of NT$14.45 is trading 47% below its estimated GF Value™ of NT$27.27. GuruFocus considers OK Biotech Co to be Possible Value Trap.

Key valuation signals for TPE:4155:

  • E10: NT$1.25
  • GF Value™: NT$27.27 vs. price of NT$14.45 (47% below fair value)
  • GF Score™: 61/100 with 7 warning signs

No single metric tells the full story. See the TPE:4155 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


OK Biotech Co Business Description

Address Gongdao 5th Road, Section 2, No. 91, Hsinchu, TWN, 30070
OK Biotech Co Ltd is mainly engaged in the manufacturing, wholesale, and retail of electronic materials and medical equipment. Its product portfolio comprises blood glucose monitoring systems, OTC hearing aids, multi-frequency therapy devices, and others. Geographically, the company generates the majority of its revenue from America, and the rest from Asia (excluding Taiwan), Africa, Europe, and Taiwan.
61GF Score

Get the complete analysis for TPE:4155

E10 is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

NT$14.45
Price
NT$27.27
GF Value