Vanguard U.S. Stock Index Funds Large-Capitalization ...

Annual Report | December 31, 2020

Vanguard U.S. Stock Index Funds Large-Capitalization Portfolios

Vanguard Growth Index Fund Vanguard Value Index Fund Vanguard Large-Cap Index Fund

Contents Your Fund's Performance at a Glance. . . . . . . . . . . . . . . . . . 1 About Your Fund's Expenses. . . . . . . . . . . . . . . . . . . . . . . . . 2 Growth Index Fund. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Value Index Fund. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Large-Cap Index Fund. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

Please note: The opinions expressed in this report are just that--informed opinions. They should not be considered promises or advice. Also, please keep in mind that the information and opinions cover the period through the date on the front of this report. Of course, the risks of investing in your fund are spelled out in the prospectus.

Your Fund's Performance at a Glance

? For the 12 months ended December 31, 2020, returns for the funds included in this report ranged from 2.18% for Investor Shares of Vanguard Value Index Fund to 40.20% for Institutional Shares of Vanguard Growth Index Fund. Returns for Vanguard Large-Cap Index Fund, which contains both growth and value stocks, ranged from 20.89% for Investor Shares to 21.05% for Institutional Shares. Each fund closely tracked its target index.

? The period was marked by the global spread of COVID-19 and efforts to contain it. Responses from policymakers, the creation and initial distribution of vaccines, and the easing of some restrictions soon lifted investor sentiment, and stock markets hit highs in December.

? Technology was the biggest contributor to performance for both the Large-Cap Index Fund and the Growth Index Fund. The Value Index Fund benefited most from its stocks in health care and industrials.

? For the ten years ended December 31, 2020, the funds' annualized returns ranged from 11.08% for Investor Shares of the Value Index Fund to 16.68% for Institutional Shares of the Growth Index Fund.

Market Barometer

Stocks Russell 1000 Index (Large-caps) Russell 2000 Index (Small-caps) Russell 3000 Index (Broad U.S. market) FTSE All-World ex US Index (International)

Bonds Bloomberg Barclays U.S. Aggregate Bond Index (Broad taxable market) Bloomberg Barclays Municipal Bond Index (Broad tax-exempt market) FTSE Three-Month U.S. Treasury Bill Index

CPI Consumer Price Index

Average Annual Total Returns Periods Ended December 31, 2020

One Year Three Years

Five Years

20.96% 19.96 20.89 11.22

14.82% 10.25 14.49

5.18

15.60% 13.26 15.43

9.16

7.51% 5.21 0.58

1.36%

5.34% 4.64 1.56

1.85%

4.44% 3.91 1.16

1.95%

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About Your Fund's Expenses

As a shareholder of the fund, you incur ongoing costs, which include costs for portfolio management, administrative services, and shareholder reports (like this one), among others. Operating expenses, which are deducted from a fund's gross income, directly reduce the investment return of the fund.

A fund's expenses are expressed as a percentage of its average net assets. This figure is known as the expense ratio. The following examples are intended to help you understand the ongoing costs (in dollars) of investing in your fund and to compare these costs with those of other mutual funds. The examples are based on an investment of $1,000 made at the beginning of the period shown and held for the entire period.

The accompanying table illustrates your fund's costs in two ways:

? Based on actual fund return. This section helps you to estimate the actual expenses that you paid over the period. The "Ending Account Value" shown is derived from the fund`s actual return, and the third column shows the dollar amount that would have been paid by an investor who started with $1,000 in the fund. You may use the information here, together with the amount you invested, to estimate the expenses that you paid over the period.

To do so, simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the result by the number given for your fund under the heading "Expenses Paid During Period."

? Based on hypothetical 5% yearly return. This section is intended to help you compare your fund`s costs with those of other mutual funds. It assumes that the fund had a yearly return of 5% before expenses, but that the expense ratio is unchanged. In this case--because the return used is not the fund's actual return--the results do not apply to your investment. The example is useful in making comparisons because the Securities and Exchange Commission requires all mutual funds to calculate expenses based on a 5% return. You can assess your fund's costs by comparing this hypothetical example with the hypothetical examples that appear in shareholder reports of other funds.

Note that the expenses shown in the table are meant to highlight and help you compare ongoing costs only and do not reflect transaction costs incurred by the fund for buying and selling securities. Further, the expenses do not include any purchase, redemption, or account service fees described in the fund prospectus. If such fees were applied to your account, your costs would be higher. Your fund does not carry a "sales load."

The calculations assume no shares were bought or sold during the period. Your actual costs may have been higher or lower, depending on the amount of your investment and the timing of any purchases or redemptions.

You can find more information about the fund's expenses, including annual expense ratios, in the Financial Statements section of this report. For additional information on operating expenses and other shareholder costs, please refer to your fund's current prospectus.

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Six Months Ended December 31, 2020

Based on Actual Fund Return Growth Index Fund

Investor Shares ETF Shares AdmiralTM Shares Institutional Shares Value Index Fund Investor Shares ETF Shares Admiral Shares Institutional Shares Large-Cap Index Fund Investor Shares ETF Shares Admiral Shares Institutional Shares

Beginning Account Value

6/30/2020

Ending Account Value

12/31/2020

Expenses Paid During

Period

$1,000.00 1,000.00 1,000.00 1,000.00

$1,000.00 1,000.00 1,000.00 1,000.00

$1,000.00 1,000.00 1,000.00 1,000.00

$1,258.55 1,259.31 1,259.38 1,259.41

$1,208.97 1,209.53 1,209.49 1,209.55

$1,236.42 1,237.26 1,237.39 1,237.35

$0.97 0.23 0.28 0.23

$0.94 0.22 0.28 0.22

$0.96 0.22 0.28 0.22

Based on Hypothetical 5% Yearly Return

Growth Index Fund

Investor Shares

$1,000.00

$1,024.28

$0.86

ETF Shares

1,000.00

1,024.94

0.20

Admiral Shares

1,000.00

1,024.89

0.25

Institutional Shares

1,000.00

1,024.94

0.20

Value Index Fund

Investor Shares

$1,000.00

$1,024.28

$0.86

ETF Shares

1,000.00

1,024.94

0.20

Admiral Shares

1,000.00

1,024.89

0.25

Institutional Shares

1,000.00

1,024.94

0.20

Large-Cap Index Fund

Investor Shares

$1,000.00

$1,024.28

$0.86

ETF Shares

1,000.00

1,024.94

0.20

Admiral Shares

1,000.00

1,024.89

0.25

Institutional Shares

1,000.00

1,024.94

0.20

The calculations are based on expenses incurred in the most recent six-month period. The funds' annualized six-month expense ratios for that period are: for the Growth Index Fund, 0.17% for Investor Shares, 0.04% for ETF Shares, 0.05% for Admiral Shares, and 0.04% for Institutional Shares; for the Value Index Fund, 0.17% for Investor Shares, 0.04% for ETF Shares, 0.05% for Admiral Shares, and 0.04% for Institutional Shares; and for the Large-Cap Index Fund, 0.17% for Investor Shares, 0.04% for ETF Shares, 0.05% for Admiral Shares, and 0.04% for Institutional Shares. The dollar amounts shown as "Expenses Paid" are equal to the annualized expense ratio multiplied by the average account value over the period, multiplied by the number of days in the most recent six-month period, then divided by the number of days in the most recent 12-month period (184/366).

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Growth Index Fund

Performance Summary

All of the returns in this report represent past performance, which is not a guarantee of future results that may be achieved by the fund. (Current performance may be lower or higher than the performance data cited. For performance data current to the most recent month-end, visit our website at performance.) Note, too, that both investment returns and principal value can fluctuate widely, so an investor's shares, when sold, could be worth more or less than their original cost. The returns shown do not reflect taxes that a shareholder would pay on fund distributions or on the sale of fund shares.

Cumulative Performance: December 31, 2010, Through December 31, 2020 Initial Investment of $10,000

$55,000 46,109

2011

2012

2013

2014

2015

2016

2017

2018

2019

2020

6,000

Growth Index Fund Investor Shares

Average Annual Total Returns Periods Ended December 31, 2020

One Year

40.01%

Five Years

20.18%

Ten Years

16.51%

Final Value of a $10,000 Investment

$46,109

? ? ? ? ? ? ? ? Spliced Growth Index

40.27

20.37

16.74

46,992

________ Dow Jones U.S. Total Stock Market Float Adjusted Index

20.79

15.36

13.74

36,240

Spliced Growth Index: S&P 500 Growth Index (formerly known as the S&P 500/Barra Growth Index) through May 16, 2003; MSCI US Prime Market Growth Index through April 16, 2013; CRSP US Large Cap Growth Index thereafter.

Growth Index Fund ETF Shares Net Asset Value

Growth Index Fund ETF Shares Market Price

Spliced Growth Index

Dow Jones U.S. Total Stock Market Float Adjusted Index

One Year

40.16%

40.27 40.27

20.79

Five Years

20.33%

20.34 20.37

15.36

Ten Years

16.67%

16.67 16.74

13.74

Final Value of a $10,000 Investment

$46,736

46,744 46,992

36,240

See Financial Highlights for dividend and capital gains information. 4

Growth Index Fund

Growth Index Fund Admiral Shares

Spliced Growth Index

Dow Jones U.S. Total Stock Market Float Adjusted Index

Average Annual Total Returns Periods Ended December 31, 2020

One Year 40.19% 40.27

20.79

Five Years 20.32% 20.37

15.36

Ten Years 16.67% 16.74

13.74

Final Value of a $10,000 Investment

$46,720 46,992

36,240

Growth Index Fund Institutional Shares

Spliced Growth Index Dow Jones U.S. Total Stock Market Float Adjusted Index

One Year 40.20% 40.27

20.79

Five Years 20.34% 20.37

15.36

Ten Years 16.68% 16.74

13.74

Final Value of a $5,000,000

Investment

$23,388,738

23,496,108

18,120,128

Cumulative Returns of ETF Shares: December 31, 2010, Through December 31, 2020

One Year

Five Years

Ten Years

Growth Index Fund ETF Shares Market Price

40.27%

152.38%

367.44%

Growth Index Fund ETF Shares Net Asset Value

40.16

152.27

367.36

Spliced Growth Index

40.27

152.69

369.92

For the ETF Shares, the market price is determined by the midpoint of the bid-offer spread as of the closing time of the New York Stock Exchange (generally 4 p.m., Eastern time). The net asset value is also determined as of the NYSE closing time. For more information about how the ETF Shares' market prices have compared with their net asset value, visit , select your ETF, and then select the Price and Performance tab. The ETF premium/discount analysis there shows the percentages of days on which the ETF Shares' market price was above or below the NAV.

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Growth Index Fund

Fund Allocation

As of December 31, 2020

Basic Materials

1.3%

Consumer Discretionary

23.0

Consumer Staples

1.2

Energy

0.3

Financials

2.6

Health Care

8.4

Industrials

13.0

Real Estate

2.7

Technology

46.2

Telecommunications

1.1

Utilities

0.2

The table reflects the fund's investments, except for short-term investments and derivatives. Sector categories are based on the Industry Classification Benchmark ("ICB"), except for the "Other" category (if applicable), which includes securities that have not been provided an ICB classification as of the effective reporting period.

The fund may invest in derivatives (such as futures and swap contracts) for various reasons, including, but not limited to, attempting to remain fully invested and tracking its target index as closely as possible.

The Industry Classification Benchmark ("ICB") is owned by FTSE. FTSE does not accept any liability to any person for any loss or damage arising out of any error or omission in the ICB.

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