Item 1A. Risk Factors

In addition to the other information set forth in this Quarterly Report on Form 10-Q, you should carefully consider the factors disclosed in Part I, “Item 1A Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2020 (the “2020 Form 10-K”), which could materially affect our business, financial condition or future results. The risks described in our 2020 Form 10-K are not the only risks facing our Company. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially adversely affect our business, financial condition and/or results of operations. There have been no material changes to the Risk Factors as previously disclosed in Part I, “Item 1A Risk Factors” in our 2020 Form 10-K.

**Item 2.**Unregistered Sales of Equity Securities and Use of Proceeds

The following table is a summary of our repurchases of common stock during each of the three months in the quarter ended September 30, 2021:

ISSUER PURCHASES OF EQUITY SECURITIES

(1) The number of shares purchased consists of shares of common stock tendered by employees to the Company to satisfy the employees' minimum tax withholding obligations arising as a result of vesting of restricted stock grants under the Company’s 2016 Stock Incentive Plan, as amended, which shares were purchased by the Company based on their fair market value on the trading day immediately preceding the vesting date. None of these share purchases were part of a publicly announced program to purchase common stock of the Company.

**Item 3.**Defaults Upon Senior Securities

None.

**Item 4.**Mine Safety Disclosures

Not applicable.