Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.

Halliburton Company’s common stock is traded on the New York Stock Exchange under the symbol "HAL." Information related to quarterly dividend payments is included under the caption “Quarterly Financial Data” in the consolidated financial statements. The declaration and payment of future dividends will be at the discretion of the Board of Directors and will depend on, among other things, future earnings, general financial condition and liquidity, success in business activities, capital requirements, and general business conditions.

The following graph and table compare total shareholder return on our common stock for the five-year period ended December 31, 2020, with the Philadelphia Oil Service Index (OSX) and the Standard & Poor’s 500 ® Index over the same period. This comparison assumes the investment of $100 on December 31, 2015 and the reinvestment of all dividends. The shareholder return set forth is not necessarily indicative of future performance. The following graph and related information shall not be deemed “soliciting material” or to be “filed” with the SEC, nor shall such information be incorporated by reference into any future filing under the Securities Act of 1933 or the Securities Exchange Act of 1934, except to the extent that Halliburton specifically incorporates it by reference into such filing.

HAL 2020 FORM 10-K | 18

At January 29, 2021, we had 11,050 shareholders of record. In calculating the number of shareholders, we consider clearing agencies and security position listings as one shareholder for each agency or listing.

The following table is a summary of repurchases of our common stock during the three-month period ended December 31, 2020.

(a) All of the 170,971 shares purchased during the three-month period ended December 31, 2020 were acquired from employees in connection with the settlement of income tax and related benefit withholding obligations arising from vesting in restricted stock grants. These shares were not part of a publicly announced program to purchase common stock.

(b) Our Board of Directors has authorized a plan to repurchase a specified dollar amount of our common stock from time to time. Approximately $5.1 billion remained authorized for repurchases as of December 31, 2020. From the inception of this program in February 2006 through December 31, 2020, we repurchased approximately 224 million shares of our common stock for a total cost of approximately $9.0 billion.