worldmega497.htm - Generated by SEC Publisher for SEC Filing

0000932471-13-006516.txt : 20130501 0000932471-13-006516.hdr.sgml : 20130501 20130501100254 ACCESSION NUMBER: 0000932471-13-006516 CONFORMED SUBMISSION TYPE: 497 PUBLIC DOCUMENT COUNT: 7 FILED AS OF DATE: 20130501 DATE AS OF CHANGE: 20130501 EFFECTIVENESS DATE: 20130501 FILER: COMPANY DATA: COMPANY CONFORMED NAME: VANGUARD WORLD FUND CENTRAL INDEX KEY: 0000052848 IRS NUMBER: 046035483 STATE OF INCORPORATION: DE FISCAL YEAR END: 0831 FILING VALUES: FORM TYPE: 497 SEC ACT: 1933 Act SEC FILE NUMBER: 002-17620 FILM NUMBER: 13800891 BUSINESS ADDRESS: STREET 1: PO BOX 2600 STREET 2: V26 CITY: VALLEY FORGE STATE: PA ZIP: 19482 BUSINESS PHONE: 6106691000 MAIL ADDRESS: STREET 1: PO BOX 2600 STREET 2: V26 CITY: VALLEY FORGE STATE: PA ZIP: 19482 FORMER COMPANY: FORMER CONFORMED NAME: VANGUARD WORLD FUNDS DATE OF NAME CHANGE: 20020402 FORMER COMPANY: FORMER CONFORMED NAME: VANGUARD WORLD FUND INC DATE OF NAME CHANGE: 19920703 FORMER COMPANY: FORMER CONFORMED NAME: IVEST FUND INC DATE OF NAME CHANGE: 19850923

0000052848 S000019699 Vanguard Mega Cap 300 Value Index Fund

C000055212 Institutional Shares VMVLX

C000055213 ETF Shares MGV

0000052848 S000019700 Vanguard Mega Cap 300 Growth Index Fund

C000055215 Institutional Shares VMGAX

C000055216 ETF Shares MGK

497 1 worldmega497.htm WORLD FUNDS 497 worldmega497.htm - Generated by SEC Publisher for SEC Filing

May 1, 2013


U.S. Securities & Exchange Commission
100 F Street, N.E.
Washington, DC 20549


Re:	Vanguard World Funds (the “Trust”); File No. 2-17620


Commissioners:

Pursuant to Rule 497(e) under the Securities Act of 1933, we hereby file exhibits containing
interactive data format risk/return summary information that reflects the risk/return summary
information in the supplements dated April 17, 2013, filed pursuant to Rule 497(e), for the Vanguard
Mega Cap 300 Value Index Fund and Vanguard Mega Cap 300 Growth Index Fund, each a series of
the above mentioned Trust.

If you have any questions or comments concerning the foregoing, please contact me at
(610) 669-1538.


Sincerely,



Judith L. Gaines
Associate Counsel
The Vanguard Group, Inc.


Enclosures


cc: Amy Miller, Esq.
U. S. Securities and Exchange Commission

EX-101.INS 3 worldstkr-20130417.xml INSTANCE 2013-04-12 2013-04-12 [SHIP LOGO VANGUARD (R)]Vanguard Mega Cap 300 Value Index FundVanguard Mega Cap 300 Growth Index FundSupplement to the Prospectus and Summary Prospectuses for Exchange-Traded Fund SharesNew Target IndexesEffective immediately, Vanguard Mega Cap 300 Value Index Fund and Vanguard Mega Cap 300 Growth Index Fund have begun tracking new target indexes, as previously approved by the Funds' board of trustees. The board believes that the new indexes, listed below, are well-constructed and offer comprehensive coverage of the Funds' respective market segments. In addition, Vanguard's agreement with the new index provider may result in considerable savings to shareholders over time in the form of lower expense ratios.Vanguard Fund Previous Target Index New Target Index Mega Cap 300 Value Index Fund MSCI US Large Cap Value Index CRSP US Mega Cap Value Index Mega Cap 300 Growth Index Fund MSCI US Large Cap Growth Index CRSP US Mega CapGrowth Index Each new index measures the same market segment as the corresponding previous index, so the investment objective and risks described in each Fund's current prospectus will not change. A Fund's new target index could provide different investment returns (either lower or higher) or different levels of volatility from those of the previous index.Fund Name Changes To better coincide with their new target indexes, Vanguard Mega Cap 300 Value Index Fund has changed its name to Vanguard Mega Cap Value Index Fund, and Vanguard Mega Cap 300 Growth Index Fund has changed its name to Vanguard Mega Cap Growth Index Fund.Prospectus and Summary Prospectus Text Changes for Vanguard Mega Cap 300 Value Index FundAll references to Vanguard Mega Cap 300 Value Index Fund and Vanguard Mega Cap 300 Value ETF are replaced with Vanguard Mega Cap Value Index Fund and Vanguard Mega Cap Value ETF, respectively.The paragraph under 'Primary Investment Strategies' is replaced with the following:The Fund employs an indexing investment approach designed to track the performance of the CRSP US Mega Cap Value Index, which represents the value companies of the CRSP US Mega Cap Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of mega-capitalization value stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The paragraph under 'Annual Total Returns' is replaced with the following:The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares (based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.The following credit line is added:Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds.Prospectus and Summary Prospectus Text Changes for Vanguard Mega Cap 300 Growth Index FundAll references to Vanguard Mega Cap 300 Growth Index Fund and Vanguard Mega Cap 300 Growth ETF are replaced with Vanguard Mega Cap Growth Index Fund and Vanguard Mega Cap Growth ETF, respectively.The paragraph under 'Primary Investment Strategies' is replaced withthe following:The Fund employs an indexing investment approach designed to track the performance of the CRSP US Mega Cap Growth Index, which represents the growth companies of the CRSP US Mega Cap Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of mega-capitalization growth stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The paragraph under 'Annual Total Returns' is replaced with the following:The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares (based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.The following credit line is added:Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds.Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds.(C) 2013 The Vanguard Group, Inc. All rights reserved.Vanguard Marketing Corporation, Distributor. PS 3137A 042013 [SHIP LOGO VANGUARD (R)]Vanguard Mega Cap 300 Value Index FundVanguard Mega Cap 300 Growth Index FundSupplement to the Prospectus and Summary Prospectuses for Institutional SharesNew Target IndexesEffective immediately, Vanguard Mega Cap 300 Value Index Fund and Vanguard Mega Cap 300 Growth Index Fund have begun tracking new target indexes, as previously approved by the Funds' board of trustees. The board believes that the new indexes, listed below, are well-constructed and offer comprehensive coverage of the Funds' respective market segments. In addition, Vanguard's agreement with the new index provider may result in considerable savings to shareholders over time in the form of lower expense ratios.Vanguard Fund Previous Target Index New Target Index Mega Cap 300 Value Index Fund MSCI US Large Cap Value Index CRSP US Mega Cap Value Index Mega Cap 300 Growth Index Fund MSCI US Large Cap Growth Index CRSP US Mega CapGrowth Index Each new index measures the same market segment as the corresponding previous index, so the investment objective and risks described in each Fund's current prospectus will not change. A Fund's new target index could provide different investment returns (either lower or higher) or different levels of volatility from those of the previous index.Fund Name Changes To better coincide with their new target indexes, Vanguard Mega Cap 300 Value Index Fund has changed its name to Vanguard Mega Cap Value Index Fund, and Vanguard Mega Cap 300 Growth Index Fund has changed its name to Vanguard Mega Cap Growth Index Fund.Prospectus and Summary Prospectus Text Changes for Vanguard Mega Cap 300 Value Index FundAll references to Vanguard Mega Cap 300 Value Index Fund are replaced with Vanguard Mega Cap Value Index Fund. The paragraph under 'Primary Investment Strategies' is replaced with the following:The Fund employs an indexing investment approach designed to track the performance of the CRSP US Mega Cap Value Index, which represents the value companies of the CRSP US Mega Cap Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of mega-capitalization value stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The paragraph under 'Annual Total Returns' is replaced with the following:The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Institutional Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Institutional Shares compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.The following credit line is added:Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds.Prospectus and Summary Prospectus Text Changes for Vanguard Mega Cap 300 Growth Index FundAll references to Vanguard Mega Cap 300 Growth Index Fund are replaced with Vanguard Mega Cap Growth Index Fund.The paragraph used 'Primary Investment Strategies' is replaced with the following:The Fund employs an indexing investment approach designed to track the performance of the CRSP US Mega Cap Growth Index, which represents the growth companies of the CRSP US Mega Cap Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of mega-capitalization growth stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The paragraph under 'Annual Total Returns' is replaced with the following:The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Institutional Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Institutional Shares compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.The following credit line is added:Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds.Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds.(C) 2013 The Vanguard Group, Inc. All rights reserved.Vanguard Marketing Corporation, Distributor. PS 828D 042013 2013-04-12 2013-04-12 [SHIP LOGO VANGUARD (R)]Vanguard Mega Cap 300 Value Index FundVanguard Mega Cap 300 Growth Index FundSupplement to the Prospectus and Summary Prospectuses for Exchange-Traded Fund SharesNew Target IndexesEffective immediately, Vanguard Mega Cap 300 Value Index Fund and Vanguard Mega Cap 300 Growth Index Fund have begun tracking new target indexes, as previously approved by the Funds' board of trustees. The board believes that the new indexes, listed below, are well-constructed and offer comprehensive coverage of the Funds' respective market segments. In addition, Vanguard's agreement with the new index provider may result in considerable savings to shareholders over time in the form of lower expense ratios.Vanguard Fund Previous Target Index New Target Index Mega Cap 300 Value Index Fund MSCI US Large Cap Value Index CRSP US Mega Cap Value Index Mega Cap 300 Growth Index Fund MSCI US Large Cap Growth Index CRSP US Mega CapGrowth Index Each new index measures the same market segment as the corresponding previous index, so the investment objective and risks described in each Fund's current prospectus will not change. A Fund's new target index could provide different investment returns (either lower or higher) or different levels of volatility from those of the previous index.Fund Name Changes To better coincide with their new target indexes, Vanguard Mega Cap 300 Value Index Fund has changed its name to Vanguard Mega Cap Value Index Fund, and Vanguard Mega Cap 300 Growth Index Fund has changed its name to Vanguard Mega Cap Growth Index Fund.Prospectus and Summary Prospectus Text Changes for Vanguard Mega Cap 300 Value Index FundAll references to Vanguard Mega Cap 300 Value Index Fund and Vanguard Mega Cap 300 Value ETF are replaced with Vanguard Mega Cap Value Index Fund and Vanguard Mega Cap Value ETF, respectively.The paragraph under 'Primary Investment Strategies' is replaced with the following:The Fund employs an indexing investment approach designed to track the performance of the CRSP US Mega Cap Value Index, which represents the value companies of the CRSP US Mega Cap Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of mega-capitalization value stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The paragraph under 'Annual Total Returns' is replaced with the following:The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares (based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.The following credit line is added:Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds.Prospectus and Summary Prospectus Text Changes for Vanguard Mega Cap 300 Growth Index FundAll references to Vanguard Mega Cap 300 Growth Index Fund and Vanguard Mega Cap 300 Growth ETF are replaced with Vanguard Mega Cap Growth Index Fund and Vanguard Mega Cap Growth ETF, respectively.The paragraph under 'Primary Investment Strategies' is replaced withthe following:The Fund employs an indexing investment approach designed to track the performance of the CRSP US Mega Cap Growth Index, which represents the growth companies of the CRSP US Mega Cap Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of mega-capitalization growth stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The paragraph under 'Annual Total Returns' is replaced with the following:The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares (based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.The following credit line is added:Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds.Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds.(C) 2013 The Vanguard Group, Inc. All rights reserved.Vanguard Marketing Corporation, Distributor. PS 3137A 042013 [SHIP LOGO VANGUARD (R)]Vanguard Mega Cap 300 Value Index FundVanguard Mega Cap 300 Growth Index FundSupplement to the Prospectus and Summary Prospectuses for Institutional SharesNew Target IndexesEffective immediately, Vanguard Mega Cap 300 Value Index Fund and Vanguard Mega Cap 300 Growth Index Fund have begun tracking new target indexes, as previously approved by the Funds' board of trustees. The board believes that the new indexes, listed below, are well-constructed and offer comprehensive coverage of the Funds' respective market segments. In addition, Vanguard's agreement with the new index provider may result in considerable savings to shareholders over time in the form of lower expense ratios.Vanguard Fund Previous Target Index New Target Index Mega Cap 300 Value Index Fund MSCI US Large Cap Value Index CRSP US Mega Cap Value Index Mega Cap 300 Growth Index Fund MSCI US Large Cap Growth Index CRSP US Mega CapGrowth Index Each new index measures the same market segment as the corresponding previous index, so the investment objective and risks described in each Fund's current prospectus will not change. A Fund's new target index could provide different investment returns (either lower or higher) or different levels of volatility from those of the previous index.Fund Name Changes To better coincide with their new target indexes, Vanguard Mega Cap 300 Value Index Fund has changed its name to Vanguard Mega Cap Value Index Fund, and Vanguard Mega Cap 300 Growth Index Fund has changed its name to Vanguard Mega Cap Growth Index Fund.Prospectus and Summary Prospectus Text Changes for Vanguard Mega Cap 300 Value Index FundAll references to Vanguard Mega Cap 300 Value Index Fund are replaced with Vanguard Mega Cap Value Index Fund. The paragraph under 'Primary Investment Strategies' is replaced with the following:The Fund employs an indexing investment approach designed to track the performance of the CRSP US Mega Cap Value Index, which represents the value companies of the CRSP US Mega Cap Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of mega-capitalization value stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The paragraph under 'Annual Total Returns' is replaced with the following:The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Institutional Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Institutional Shares compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.The following credit line is added:Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds.Prospectus and Summary Prospectus Text Changes for Vanguard Mega Cap 300 Growth Index FundAll references to Vanguard Mega Cap 300 Growth Index Fund are replaced with Vanguard Mega Cap Growth Index Fund.The paragraph used 'Primary Investment Strategies' is replaced with the following:The Fund employs an indexing investment approach designed to track the performance of the CRSP US Mega Cap Growth Index, which represents the growth companies of the CRSP US Mega Cap Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of mega-capitalization growth stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The paragraph under 'Annual Total Returns' is replaced with the following:The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Institutional Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Institutional Shares compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447.The following credit line is added:Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds.Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds.(C) 2013 The Vanguard Group, Inc. All rights reserved.Vanguard Marketing Corporation, Distributor. 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Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Document Type	dei_DocumentType	Other
Document Period End Date	dei_DocumentPeriodEndDate	Aug. 31, 2012
Registrant Name	dei_EntityRegistrantName	Vanguard World Fund
Central Index Key	dei_EntityCentralIndexKey	0000052848
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Apr. 17, 2013
Document Effective Date	dei_DocumentEffectiveDate	Apr. 17, 2013
Vanguard Mega Cap Growth Index Fund \| ETF
Risk/Return:	rr_RiskReturnAbstract
Prospectus Date	rr_ProspectusDate	Apr. 12, 2013
Vanguard Mega Cap Growth Index Fund \| Institutional
Risk/Return:	rr_RiskReturnAbstract
Prospectus Date	rr_ProspectusDate	Apr. 12, 2013
Vanguard Mega Cap Value Index Fund \| ETF
Risk/Return:	rr_RiskReturnAbstract
Prospectus Date	rr_ProspectusDate	Apr. 12, 2013
Vanguard Mega Cap Value Index Fund \| Institutional
Risk/Return:	rr_RiskReturnAbstract
Prospectus Date	rr_ProspectusDate	Apr. 12, 2013

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Supplement	12 Months Ended
Supplement	Aug. 31, 2012
ETF \| Vanguard Mega Cap Growth Index Fund
Supplement Text
Supplement Text:	[SHIP LOGO VANGUARD (R)] Vanguard Mega Cap 300 Value Index Fund Vanguard Mega Cap 300 Growth Index Fund Supplement to the Prospectus and Summary Prospectuses for Exchange-Traded Fund Shares New Target Indexes Effective immediately, Vanguard Mega Cap 300 Value Index Fund and Vanguard Mega Cap 300 Growth Index Fund have begun tracking new target indexes, as previously approved by the Funds' board of trustees. The board believes that the new indexes, listed below, are well-constructed and offer comprehensive coverage of the Funds' respective market segments. In addition, Vanguard's agreement with the new index provider may result in considerable savings to shareholders over time in the form of lower expense ratios. Vanguard Fund Previous Target Index New Target Index Mega Cap 300 Value Index Fund MSCI US Large Cap Value Index CRSP US Mega Cap Value Index Mega Cap 300 Growth Index Fund MSCI US Large Cap Growth Index CRSP US Mega CapGrowth Index Each new index measures the same market segment as the corresponding previous index, so the investment objective and risks described in each Fund's current prospectus will not change. A Fund's new target index could provide different investment returns (either lower or higher) or different levels of volatility from those of the previous index. Fund Name Changes To better coincide with their new target indexes, Vanguard Mega Cap 300 Value Index Fund has changed its name to Vanguard Mega Cap Value Index Fund, and Vanguard Mega Cap 300 Growth Index Fund has changed its name to Vanguard Mega Cap Growth Index Fund. Prospectus and Summary Prospectus Text Changes for Vanguard Mega Cap 300 Value Index Fund All references to Vanguard Mega Cap 300 Value Index Fund and Vanguard Mega Cap 300 Value ETF are replaced with Vanguard Mega Cap Value Index Fund and Vanguard Mega Cap Value ETF, respectively. The paragraph under 'Primary Investment Strategies' is replaced with the following: The Fund employs an indexing investment approach designed to track the performance of the CRSP US Mega Cap Value Index, which represents the value companies of the CRSP US Mega Cap Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of mega-capitalization value stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The paragraph under 'Annual Total Returns' is replaced with the following: The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares (based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447. The following credit line is added: Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds. Prospectus and Summary Prospectus Text Changes for Vanguard Mega Cap 300 Growth Index Fund All references to Vanguard Mega Cap 300 Growth Index Fund and Vanguard Mega Cap 300 Growth ETF are replaced with Vanguard Mega Cap Growth Index Fund and Vanguard Mega Cap Growth ETF, respectively. The paragraph under 'Primary Investment Strategies' is replaced withthe following: The Fund employs an indexing investment approach designed to track the performance of the CRSP US Mega Cap Growth Index, which represents the growth companies of the CRSP US Mega Cap Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of mega-capitalization growth stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The paragraph under 'Annual Total Returns' is replaced with the following: The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares (based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447. The following credit line is added: Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds. Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds. (C) 2013 The Vanguard Group, Inc. All rights reserved. Vanguard Marketing Corporation, Distributor. PS 3137A 042013
ETF \| Vanguard Mega Cap Value Index Fund
Supplement Text
Supplement Text:	[SHIP LOGO VANGUARD (R)] Vanguard Mega Cap 300 Value Index Fund Vanguard Mega Cap 300 Growth Index Fund Supplement to the Prospectus and Summary Prospectuses for Exchange-Traded Fund Shares New Target Indexes Effective immediately, Vanguard Mega Cap 300 Value Index Fund and Vanguard Mega Cap 300 Growth Index Fund have begun tracking new target indexes, as previously approved by the Funds' board of trustees. The board believes that the new indexes, listed below, are well-constructed and offer comprehensive coverage of the Funds' respective market segments. In addition, Vanguard's agreement with the new index provider may result in considerable savings to shareholders over time in the form of lower expense ratios. Vanguard Fund Previous Target Index New Target Index Mega Cap 300 Value Index Fund MSCI US Large Cap Value Index CRSP US Mega Cap Value Index Mega Cap 300 Growth Index Fund MSCI US Large Cap Growth Index CRSP US Mega CapGrowth Index Each new index measures the same market segment as the corresponding previous index, so the investment objective and risks described in each Fund's current prospectus will not change. A Fund's new target index could provide different investment returns (either lower or higher) or different levels of volatility from those of the previous index. Fund Name Changes To better coincide with their new target indexes, Vanguard Mega Cap 300 Value Index Fund has changed its name to Vanguard Mega Cap Value Index Fund, and Vanguard Mega Cap 300 Growth Index Fund has changed its name to Vanguard Mega Cap Growth Index Fund. Prospectus and Summary Prospectus Text Changes for Vanguard Mega Cap 300 Value Index Fund All references to Vanguard Mega Cap 300 Value Index Fund and Vanguard Mega Cap 300 Value ETF are replaced with Vanguard Mega Cap Value Index Fund and Vanguard Mega Cap Value ETF, respectively. The paragraph under 'Primary Investment Strategies' is replaced with the following: The Fund employs an indexing investment approach designed to track the performance of the CRSP US Mega Cap Value Index, which represents the value companies of the CRSP US Mega Cap Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of mega-capitalization value stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The paragraph under 'Annual Total Returns' is replaced with the following: The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares (based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447. The following credit line is added: Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds. Prospectus and Summary Prospectus Text Changes for Vanguard Mega Cap 300 Growth Index Fund All references to Vanguard Mega Cap 300 Growth Index Fund and Vanguard Mega Cap 300 Growth ETF are replaced with Vanguard Mega Cap Growth Index Fund and Vanguard Mega Cap Growth ETF, respectively. The paragraph under 'Primary Investment Strategies' is replaced withthe following: The Fund employs an indexing investment approach designed to track the performance of the CRSP US Mega Cap Growth Index, which represents the growth companies of the CRSP US Mega Cap Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of mega-capitalization growth stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The paragraph under 'Annual Total Returns' is replaced with the following: The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's ETF Shares (based on NAV) has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the ETF Shares compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447. The following credit line is added: Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds. Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds. (C) 2013 The Vanguard Group, Inc. All rights reserved. Vanguard Marketing Corporation, Distributor. PS 3137A 042013
Institutional \| Vanguard Mega Cap Growth Index Fund
Supplement Text
Supplement Text:	[SHIP LOGO VANGUARD (R)] Vanguard Mega Cap 300 Value Index Fund Vanguard Mega Cap 300 Growth Index Fund Supplement to the Prospectus and Summary Prospectuses for Institutional Shares New Target Indexes Effective immediately, Vanguard Mega Cap 300 Value Index Fund and Vanguard Mega Cap 300 Growth Index Fund have begun tracking new target indexes, as previously approved by the Funds' board of trustees. The board believes that the new indexes, listed below, are well-constructed and offer comprehensive coverage of the Funds' respective market segments. In addition, Vanguard's agreement with the new index provider may result in considerable savings to shareholders over time in the form of lower expense ratios. Vanguard Fund Previous Target Index New Target Index Mega Cap 300 Value Index Fund MSCI US Large Cap Value Index CRSP US Mega Cap Value Index Mega Cap 300 Growth Index Fund MSCI US Large Cap Growth Index CRSP US Mega CapGrowth Index Each new index measures the same market segment as the corresponding previous index, so the investment objective and risks described in each Fund's current prospectus will not change. A Fund's new target index could provide different investment returns (either lower or higher) or different levels of volatility from those of the previous index. Fund Name Changes To better coincide with their new target indexes, Vanguard Mega Cap 300 Value Index Fund has changed its name to Vanguard Mega Cap Value Index Fund, and Vanguard Mega Cap 300 Growth Index Fund has changed its name to Vanguard Mega Cap Growth Index Fund. Prospectus and Summary Prospectus Text Changes for Vanguard Mega Cap 300 Value Index Fund All references to Vanguard Mega Cap 300 Value Index Fund are replaced with Vanguard Mega Cap Value Index Fund. The paragraph under 'Primary Investment Strategies' is replaced with the following: The Fund employs an indexing investment approach designed to track the performance of the CRSP US Mega Cap Value Index, which represents the value companies of the CRSP US Mega Cap Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of mega-capitalization value stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The paragraph under 'Annual Total Returns' is replaced with the following: The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Institutional Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Institutional Shares compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447. The following credit line is added: Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds. Prospectus and Summary Prospectus Text Changes for Vanguard Mega Cap 300 Growth Index Fund All references to Vanguard Mega Cap 300 Growth Index Fund are replaced with Vanguard Mega Cap Growth Index Fund. The paragraph used 'Primary Investment Strategies' is replaced with the following: The Fund employs an indexing investment approach designed to track the performance of the CRSP US Mega Cap Growth Index, which represents the growth companies of the CRSP US Mega Cap Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of mega-capitalization growth stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The paragraph under 'Annual Total Returns' is replaced with the following: The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Institutional Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Institutional Shares compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447. The following credit line is added: Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds. Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds. (C) 2013 The Vanguard Group, Inc. All rights reserved. Vanguard Marketing Corporation, Distributor. PS 828D 042013
Institutional \| Vanguard Mega Cap Value Index Fund
Supplement Text
Supplement Text:	[SHIP LOGO VANGUARD (R)] Vanguard Mega Cap 300 Value Index Fund Vanguard Mega Cap 300 Growth Index Fund Supplement to the Prospectus and Summary Prospectuses for Institutional Shares New Target Indexes Effective immediately, Vanguard Mega Cap 300 Value Index Fund and Vanguard Mega Cap 300 Growth Index Fund have begun tracking new target indexes, as previously approved by the Funds' board of trustees. The board believes that the new indexes, listed below, are well-constructed and offer comprehensive coverage of the Funds' respective market segments. In addition, Vanguard's agreement with the new index provider may result in considerable savings to shareholders over time in the form of lower expense ratios. Vanguard Fund Previous Target Index New Target Index Mega Cap 300 Value Index Fund MSCI US Large Cap Value Index CRSP US Mega Cap Value Index Mega Cap 300 Growth Index Fund MSCI US Large Cap Growth Index CRSP US Mega CapGrowth Index Each new index measures the same market segment as the corresponding previous index, so the investment objective and risks described in each Fund's current prospectus will not change. A Fund's new target index could provide different investment returns (either lower or higher) or different levels of volatility from those of the previous index. Fund Name Changes To better coincide with their new target indexes, Vanguard Mega Cap 300 Value Index Fund has changed its name to Vanguard Mega Cap Value Index Fund, and Vanguard Mega Cap 300 Growth Index Fund has changed its name to Vanguard Mega Cap Growth Index Fund. Prospectus and Summary Prospectus Text Changes for Vanguard Mega Cap 300 Value Index Fund All references to Vanguard Mega Cap 300 Value Index Fund are replaced with Vanguard Mega Cap Value Index Fund. The paragraph under 'Primary Investment Strategies' is replaced with the following: The Fund employs an indexing investment approach designed to track the performance of the CRSP US Mega Cap Value Index, which represents the value companies of the CRSP US Mega Cap Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of mega-capitalization value stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The paragraph under 'Annual Total Returns' is replaced with the following: The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Institutional Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Institutional Shares compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447. The following credit line is added: Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds. Prospectus and Summary Prospectus Text Changes for Vanguard Mega Cap 300 Growth Index Fund All references to Vanguard Mega Cap 300 Growth Index Fund are replaced with Vanguard Mega Cap Growth Index Fund. The paragraph used 'Primary Investment Strategies' is replaced with the following: The Fund employs an indexing investment approach designed to track the performance of the CRSP US Mega Cap Growth Index, which represents the growth companies of the CRSP US Mega Cap Index. The Index is a free-float-adjusted, market-capitalization-weighted index designed to measure equity market performance of mega-capitalization growth stocks. The Fund attempts to replicate the target index by investing all, or substantially all, of its assets in the stocks that make up the Index, holding each stock in approximately the same proportion as its weighting in the Index. The paragraph under 'Annual Total Returns' is replaced with the following: The following bar chart and table are intended to help you understand the risks of investing in the Fund. The bar chart shows how the performance of the Fund's Institutional Shares has varied from one calendar year to another over the periods shown. The table shows how the average annual total returns of the Institutional Shares compare with those of a relevant market index, which has investment characteristics similar to those of the Fund. Keep in mind that the Fund's past performance (before and after taxes) does not indicate how the Fund will perform in the future. Updated performance information is available on our website at vanguard.com/performance or by calling Vanguard toll-free at 800-662-7447. The following credit line is added: Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds. Vanguard funds are not sponsored, endorsed, sold, or promoted by the University of Chicago or its Center for Research in Security Prices, and neither the University of Chicago nor its Center for Research in Security Prices makes any representation regarding the advisability of investing in the funds. (C) 2013 The Vanguard Group, Inc. All rights reserved. Vanguard Marketing Corporation, Distributor. PS 828D 042013

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