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	3,260,955	2.88	56,083	2/29/20
Vanguard Mid-Cap Index Fund	2,898,925	2.56	3,851	2/29/20
Vanguard 500 Index Fund	2,301,002	2.03	12,048	2/29/20
SPDR S&P 500 ETF	1,168,351	1.03	-121,312	2/29/20
MFS Growth Fund	1,143,607	1.01	-133,184	2/29/20
Invesco QQQ Trust	1,120,771	0.99	13,897	2/29/20
Statens Pensjonsfond Utland	1,116,012	0.98	101,654	12/31/19
Vanguard U.S. Growth Fund	1,110,188	0.98	-2,659	12/31/19
Communication Services Select Sector SPDR Fund	1,022,298	0.90	34,204	2/29/20
MFS Mid-Cap Growth Fund	1,011,761	0.89	11,387	2/29/20

* Insider values reflect direct beneficial ownership.