Item 1A. RISK FACTORS

There have been no material changes in the company's risk factors from those disclosed in the company's Annual Report on Form 10-K for the year ended December 31, 2020, filed with the SEC on February 26, 2021.


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

Issuer Purchases of Equity Securities


Period	(a) Total Number of Class A Shares Purchased (1)	(b) Average Price Paid Per Share		(c) Total Number of Class A Shares Purchased as Part of Publicly Announced Plans or Programs	(d) Maximum Number (or Approximate Value) that May Yet Be Purchased Under the Plans or Programs (in millions)
July 1 to July 31	557	$	210.16	—	$	—
August 1 to August 31	34	208.38		—	—
September 1 to September 30	95,514	188.80		—	—
Total	96,105	$	189.01	—

(1)Shares purchased consist of an aggregate of 96,105 shares of Class A common stock surrendered in the third quarter of 2021 to satisfy employees’ tax obligations upon the vesting of restricted stock.

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