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Allergan PLC (NYSE:AGN)
Shiller P/E Ratio
2,118.91 (As of Today)

As of today, Allergan PLC's current share price is $233.08. Allergan PLC's E10 for the quarter that ended in Jun. 2016 was $0.11. Allergan PLC's Shiller P/E Ratio for today is 2,118.91.

AGN' s Shiller P/E Ratio Range Over the Past 10 Years
Min: 16.67   Max: 2307.73
Current: 2088.55


During the past 13 years, Allergan PLC's highest Shiller P/E Ratio was 2307.73. The lowest was 16.67. And the median was 52.87.

AGN's Shiller P/E Ratio is ranked lower than
99% of the 160 Companies
in the Global Drug Manufacturers - Specialty & Generic industry.

( Industry Median: 50.57 vs. AGN: 2088.55 )

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 Jun. 2016 was $-1.440. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is $0.11 for the trailing ten years ended in Jun. 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 own 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 Jun. 2016 was:

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

Current CPI (Jun. 2016) = 241.038.

Allergan PLC Quarterly Data

per share eps 0.5500.280-3.950-3.030-1.850-0.80013.290-2.2000.470-1.440
CPI 236.293238.343238.031234.812236.119238.638237.945236.525238.132241.038
Adj_EPS 0.5610.283-4.000-3.110-1.889-0.80813.463-2.2420.476-1.440
per share eps 0.5400.7500.430-0.4900.6000.220-0.790-4.2700.490-0.700
CPI 226.889225.672229.392229.478231.407229.601232.773233.504234.149233.049
Adj_EPS 0.5740.8010.452-0.5150.6250.231-0.818-4.4080.504-0.724
per share eps 0.4300.4600.5500.5100.5700.5700.2100.1400.3600.420
CPI 212.709215.693215.969215.949217.631217.965218.439219.179223.467225.722
Adj_EPS 0.4870.5140.6140.5690.6310.6300.2320.1540.3880.448
per share eps 0.310-4.8000.2900.3300.3100.3400.4500.5300.6200.490
CPI 202.900201.800205.352208.352208.490210.036213.528218.815218.783210.228
Adj_EPS 0.368-5.7330.3400.3820.3580.3900.5080.5840.6830.562

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 own currency.

Allergan PLC Annual Data

ShillerPE 26.0726.1724.6537.1350.1553.3784.19570.980.001,461.95

Allergan PLC Quarterly Data

ShillerPE 678.98749.,461.951,137.922,070.70
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