Ownership Summary

Top Holders	Shares Held	% O/S	Share Change	Filing Date
The Vanguard Group, Inc.	12,327,928	10.89	444,268	9/30/19
BlackRock Institutional Trust Company, N.A.	5,582,606	4.93	88,059	9/30/19
State Street Global Advisors (US)	5,108,634	4.51	80,138	9/30/19
JP Morgan Asset Management	3,136,539	2.77	119,972	9/30/19
MFS Investment Management	3,019,182	2.67	489,744	9/30/19
Jackson Square Partners, LLC	3,007,566	2.66	-963,159	9/30/19
Invesco Advisers, Inc.	2,661,715	2.35	-234,825	9/30/19
Melvin Capital Management LP	2,502,785	2.21	1,502,785	9/30/19
Fidelity Management & Research Company	2,494,664	2.20	3,918	9/30/19
American Century Investment Management, Inc.	2,038,934	1.80	50,318	9/30/19

Fund	Shares Held	% O/S	Share Change	Filing Date
Vanguard Total Stock Market Index Fund	3,198,333	2.82	24,791	12/31/19
Vanguard Mid-Cap Index Fund	2,850,911	2.52	2,399	12/31/19
Vanguard 500 Index Fund	2,260,550	1.99	13,099	12/31/19
SPDR S&P 500 ETF	1,302,175	1.15	57,188	12/31/19
MFS Growth Fund	1,254,218	1.11	--	11/30/19
Invesco QQQ Trust	1,118,793	0.99	77,149	12/31/19
Vanguard U.S. Growth Fund	1,112,847	0.98	-122,933	9/30/19
US Bank Vanguard Institutional 500 Index Trust	1,024,351	0.90	-2,080	12/31/19
Statens Pensjonsfond Utland	1,014,358	0.89	91,649	12/31/18
JPMorgan Growth Advantage Fund	974,947	0.86	-87,300	11/30/19

* Insider values reflect direct beneficial ownership.