Jan. 25, 2019

[SHIP LOGO VANGUARD (R)]

Vanguard PRIMECAP Core Fund
Supplement Dated February 21, 2019, to the Prospectus and
Summary Prospectus Dated January 25, 2019
Prospectus and Summary Prospectus Text Changes
The “Average Annual Total Returns” table for Vanguard PRIMECAP Core Fund is
replaced with the following:
Average Annual Total Returns for Periods Ended December 31, 2018
	1 Year	5 Years	10 Years
Vanguard PRIMECAP Core Fund Investor Shares
Return Before Taxes	–4.90%	10.18%	14.73%
Return After Taxes on Distributions	–6.83	8.66	13.71
Return After Taxes on Distributions and Sale of Fund Shares	–1.49	7.94	12.35
MSCI US Prime Market 750 Index
(reflects no deduction for fees, expenses, or taxes)	–4.61%	8.36%	13.26%
© 2019 The Vanguard Group, Inc. All rights reserved.
Vanguard Marketing Corporation, Distributor.	PS 1220C 022019