Item 5. MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND

ISSUER PURCHASES OF EQUITY SECURITIES

Information regarding the principal market for our ordinary shares and related shareholder matters is as follows:

Our ordinary shares are traded on the New York Stock Exchange under the symbol IR. As of February 1, 2019, the approximate number of record holders of ordinary shares was 2,931.

Issuer Purchases of Equity Securities

The following table provides information with respect to purchases by us of our ordinary shares during the quarter ended December 31, 2018:

(a) Share repurchases are made from time to time in accordance with management's capital allocation strategy, subject to market conditions and regulatory requirements. In February 2017, our Board of Directors authorized the repurchase of up to $1.5 billion of our ordinary shares under a share repurchase program (the 2017 Authorization) upon completion of the prior authorized share repurchase program. Repurchases under the 2017 Authorization began in May 2017 and ended in December 2018, completing the program. In October 2018, our Board of Directors authorized the repurchase of up to $1.5 billion of our ordinary shares upon completion of the 2017 Authorization. The authorized shares under the new share repurchase program are not included in the approximate dollar value of shares still available to be purchased in the table above.

(b) We may also reacquire shares outside of the repurchase program from time to time in connection with the surrender of shares to cover taxes on vesting of share based awards. We reacquired 456 shares in October and 1,425 shares in December in transactions outside the repurchase programs.

Performance Graph

The following graph compares the cumulative total shareholder return on our ordinary shares with the cumulative total return on (i) the Standard & Poor’s 500 Stock Index and (ii) the Standard & Poor’s 500 Industrial Index for the five years ended December 31, 2018. The graph assumes an investment of $100 in our ordinary shares, the Standard & Poor’s 500 Stock Index and the Standard & Poor’s 500 Industrial Index on December 31, 2013 and assumes the reinvestment of dividends.