Ownership Summary

Top Holders	Shares Held	% O/S	Share Change	Filing Date
The Vanguard Group, Inc.	13,094,339	11.54	766,411	12/31/19
BlackRock Institutional Trust Company, N.A.	5,931,564	5.23	348,958	12/31/19
State Street Global Advisors (US)	5,259,664	4.64	151,030	12/31/19
MFS Investment Management	3,502,819	3.09	483,637	12/31/19
Jackson Square Partners, LLC	2,895,487	2.55	-112,079	12/31/19
JP Morgan Asset Management	2,861,260	2.52	-275,279	12/31/19
Invesco Advisers, Inc.	2,559,192	2.26	-102,523	12/31/19
Fidelity Management & Research Company	2,313,579	2.04	-181,085	12/31/19
Ivy Investment Management Company	1,793,401	1.58	-239,298	12/31/19
Geode Capital Management, L.L.C.	1,780,969	1.57	67,012	12/31/19

Fund	Shares Held	% O/S	Share Change	Filing Date
Vanguard Total Stock Market Index Fund	3,204,872	2.83	6,539	1/31/20
Vanguard Mid-Cap Index Fund	2,895,074	2.55	44,163	1/31/20
Vanguard 500 Index Fund	2,288,954	2.02	28,404	1/31/20
SPDR S&P 500 ETF	1,289,663	1.14	-12,512	1/31/20
MFS Growth Fund	1,276,791	1.13	--	1/31/20
Vanguard U.S. Growth Fund	1,110,188	0.98	-2,659	12/31/19
Invesco QQQ Trust	1,106,874	0.98	-11,919	1/31/20
Statens Pensjonsfond Utland	1,014,358	0.89	91,649	12/31/18
US Bank Vanguard Institutional 500 Index Trust	1,012,275	0.89	-12,076	1/31/20
MFS Mid-Cap Growth Fund	1,000,374	0.88	53,500	1/31/20

* Insider values reflect direct beneficial ownership.