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Allergan PLC (NYSE:AGN)
Shiller P/E Ratio
62.86 (As of Today)

As of today, Allergan PLC's current share price is $247.03. Allergan PLC's E10 for the quarter that ended in Sep. 2016 was $3.93. Allergan PLC's Shiller P/E Ratio for today is 62.86.

AGN' s Shiller P/E Ratio Range Over the Past 10 Years
Min: 18.96   Max: 2307.73
Current: 55.07


During the past 13 years, Allergan PLC's highest Shiller P/E Ratio was 2307.73. The lowest was 18.96. And the median was 54.31.

AGN's Shiller P/E Ratio is ranked lower than
60% of the 158 Companies
in the Global Drug Manufacturers - Specialty & Generic industry.

( Industry Median: 47.37 vs. AGN: 55.07 )

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.

Allergan PLC's adjusted earnings per share data for the three months ended in Sep. 2016 was $38.580. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is $3.93 for the trailing ten years ended in Sep. 2016.


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.

Allergan PLC's Shiller P/E Ratio for today is calculated as

Shiller P/E Ratio=Share Price/E10

* All numbers are in millions except for per share data and ratio. All numbers are in their local exchange's currency.

Allergan PLC's E10 for the fiscal year that ended in Dec15 is calculated as:

For example, Allergan PLC's adjusted earnings per share data for the three months ended in Sep. 2016 was:

Adj_EPS=Earnigns per Share/CPI of Sep. 2016 (Change)*Current CPI (Sep. 2016)

Current CPI (Sep. 2016) = 241.428.

Allergan PLC Quarterly Data

per share eps -3.950-3.030-1.850-0.80013.290-2.2000.470-1.44038.580-0.200
CPI 238.031234.812236.119238.638237.945236.525238.132241.018241.428241.432
Adj_EPS -4.006-3.115-1.892-0.80913.485-2.2460.477-1.44238.580-0.200
per share eps 0.430-0.4900.6000.220-0.790-4.2700.490-0.7000.5500.280
CPI 229.392229.478231.407229.601232.773233.504234.149233.049236.293238.343
Adj_EPS 0.453-0.5160.6260.231-0.819-4.4150.505-0.7250.5620.284
per share eps 0.5500.5100.5700.5700.2100.1400.3600.4200.5400.750
CPI 215.969215.949217.631217.965218.439219.179223.467225.722226.889225.672
Adj_EPS 0.6150.5700.6320.6310.2320.1540.3890.4490.5750.802
per share eps 0.2900.3300.3100.3400.4500.5300.6200.4900.4300.460
CPI 205.352208.352208.490210.036213.528218.815218.783210.228212.709215.693
Adj_EPS 0.3410.3820.3590.3910.5090.5850.6840.5630.4880.515

Add all the adjusted EPS together and divide 10 will get our E10.


Compared with the regular P/E ratio, which works poorly for cyclical businesses, the Shiller P/E smoothed out the fluctuations of profit margins during business cycles. Therefore it is more accurate in reflecting the valuation of the company.

If a company has consistent business performance, the Shiller P/E should give similar results to regular P/E.

Compared with the P/S ratio, the Shiller P/E makes the comparison between different industries more meaningful.

Be Aware

The Shiller P/E assumes that over the long term, businesses and profitability revert to their means. If a company’s business model does not work in the future compared with the past, the Shiller P/E and P/S ratio will give false valuations.

Related Terms

P/E Ratio, P/B Ratio, P/S Ratio, Price-to-Free-Cash-Flow ratio, E10

Historical Data

* All numbers are in millions except for per share data and ratio. All numbers are in their local exchange's currency.

Allergan PLC Annual Data

ShillerPE 26.3224.8037.3149.9453.2283.94574.740.001,485.4646.82

Allergan PLC Quarterly Data

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