Item 1A. RISK FACTORS

In addition to the other information set forth in this report, 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, which could materially affect our business, financial condition, or future results. The risks described in our Annual Report on 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 operating results.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

The following table provides information about purchases by the company during the quarter ended September 30, 2021 of shares of the company's common stock.


	Total Number of Shares (or Units) Purchased (1)	Average Price Paid Per Share (or Unit)		Total Number of Shares (or Units) Purchased as Part of Publicly Announced Plans or Programs (2)	Maximum Number of Shares (or Units) That May Yet Be Purchased Under the Plans or Programs (2)
July 2021	555,897	$	92.39	541,223	4,503,932
August 2021	664,807	90.34		662,908	3,841,024
September 2021	654,293	88.93		645,519	3,195,505
Third Quarter 2021	1,874,997	$	90.45	1,849,650	3,195,505

(1) The total number of shares purchased based on trade date includes: (i) 1,849,650 shares of common stock purchased under the authorization described below; and (ii) 25,347 shares of common stock surrendered to satisfy minimum statutory tax obligations under our stock incentive plans.

(2) In May 2018, the Board of Directors increased the number of shares authorized for repurchase by 15,000,000 shares. As of September 30, 2021, there were 3,195,505 shares remaining for future repurchases. Purchases can be made in the open market or in privately negotiated transactions, including Rule 10b5-1 plans and accelerated repurchase programs.

ITEM 3. DEFAULTS ON SENIOR SECURITIES

None.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

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