Welcome to Wall Street Prep! Use code at checkout for 15% off.
Wharton & Wall Street Prep Certificates
Now Enrolling for May 2024 for May 2024
Private EquityReal Estate Investing
Buy-Side InvestingFP&A
Wharton & Wall Street Prep Certificates:
Enrollment for May 2024 is Open
Wall Street Prep

Stock Split

Step-by-Step Guide to Understanding Stock Splits

Last Updated February 20, 2024

Learn Online Now

Stock Split

How Do Stock Splits Work?

The rationale behind stock splits is that individual shares are currently priced so high that potential shareholders are deterred from investing.

Stock splits are most often declared by companies with share prices determined as being too high, i.e. the shares are no longer accessible to individual investors.

Stock splits cause a company’s share price to become more affordable to retail investors, thereby broadening the investor base that could own equity.

More specifically, an abnormally high share price can prevent retail investors from diversifying their portfolios.

By allocating a greater percentage of their capital towards shares in one company, an individual investor takes on more risk, which is why the average everyday investor is unlikely to purchase even one high-priced share.

For instance, the share price of Alphabet (NASDAQ: GOOGL) as of the latest closing date (3/2/2022) was roughly $2,695 per share.

If an individual investor has $10k in capital to invest and purchased a single Class A share of Alphabet, the portfolio is already 26.8% concentrated in one share, meaning that the portfolio’s performance is largely dictated by Alphabet’s performance.

How Do Stock Splits Impact Share Price?

After a stock split, the number of shares in circulation increases, and the share price of each individual share declines.

However, the market value of the company’s equity and the value attributable to each existing shareholder remains unchanged.

The effects of a stock split are summarized below:

  • Number of Shares Increases
  • Reduction in Market Value Per Share
  • More Accessible Stock to Broader Range of Investors
  • Increased Liquidity

Stock splits theoretically have a neutral impact on a company’s overall valuation, despite the decline in share price, i.e. the market capitalization (or equity value) remains unchanged post-split.

But there are certain side considerations such as the increased liquidity within the markets that could benefit existing shareholders.

Once a stock split has occurred, the range of investors that can potentially purchase stocks in the company and become shareholders expands, resulting in greater liquidity (i.e. easier for existing shareholders to sell their stakes in the open markets).

Unlike issuances of new shares, stock splits are not dilutive to existing ownership interests.

A stock split can be visualized as cutting a slice of pie into more pieces.

  • The total size of the pie does NOT change (i.e. equity value remains unchanged)
  • The slice belonging to each person does NOT change (i.e. fixed equity ownership %).

However, the one detail that does, in fact, change is that more pieces can be distributed to people who may not have a slice.

Companies that have historically performed stock splits have been shown to outperform the market, but stock splits result from growth and positive investor sentiment rather than the stock split itself being the cause.

The Wharton Online
& Wall Street Prep
Buy-Side Investing Certificate Program

Fast track your career as a hedge fund or equity research professional. Enrollment is open for the May 13 - July 7 cohort.

Enroll Today

Stock Split Ratio and Split-Adjusted Price Formula

Stock Split Ratio Post-Split Shares Owned Split Adjusted Share Price
  • = Pre-Split Shares Owned × 2
  • = Pre-Split Share Price ÷ 2
  • = Pre-Split Shares Owned × 3
  • = Pre-Split Share Price ÷ 3
  • = Pre-Split Shares Owned × 4
  • = Pre-Split Share Price ÷ 4
  • = Pre-Split Shares Owned × 5
  • = Pre-Split Share Price ÷ 5

Let’s assume that you currently own 100 shares in a company with a share price of $100.

If the company declares a two-for-one stock split, you would now own 200 shares at $50 per share post-split.

  • Shares Owned Post-Split = 100 Shares × 2 = 200 Shares
  • Share Price Post-Split = $100 Share Price ÷ 2 = $50.00
Dividends and Stock Splits

If the company undergoing a stock split has a dividend, the dividends per share (DPS) issued to shareholders will be adjusted in proportion to the split.

Stock Split Calculator

We’ll now move to a modeling exercise, which you can access by filling out the form below.


Get the Excel Template!

By submitting this form, you consent to receive email from Wall Street Prep and agree to our terms of use and privacy policy.


Stock Split Calculation Example

Suppose a company’s shares are currently trading at $150 per share, and you’re an existing shareholder with 100 shares.

If we multiply the share price by the shares owned, we arrive at $15,000 as the total value of your shares.

  • Total Value of Shares = $150.00 Share Price × 100 Shares Owned = $15,000

Let’s say the company’s board decides to approve a 3-for-1 split. You now hold 300 shares, each priced at $50 each post-split.

  • Total Shares Owned = 100 × 3 = 300
  • Share Price = $150.00 ÷ 3 = $50.00

After the split, your holdings are still worth $15,000, as shown by the calculation below.

  • Total Value of Shares = $50.00 Share Price × 300 Shares Owned = $15,000

Given the reduced share price, you are more likely to sell your shares more easily because there are more potential buyers in the market.

Stock Split Calculator

Google Stock Split Example (2022)

Alphabet Inc. (NASDAQ: GOOG), the parent company of Google, stated in early February 2022 that a 20-for-1 stock split would be enacted on all three classes of their shares.

Alphabet Q4-21 Earnings Call

“The reason for the split is it makes our shares more accessible. We thought it made sense to do.”

– Ruth Porat, Alphabet CFO

As of July 1, 2022, each Alphabet shareholder will be given 19 more shares for each share already owned, which will be transferred on July 15 — shortly afterward, its shares begin trading at the split-adjusted price on the 18th.

Google Stock Split

Alphabet Q-4 2021 Results — Stock Split Commentary (Source: Q4-21 Press Release)

Alphabet has a three-class share structure:

  • Class A: Common Shares with Voting Rights (GOOGL)
  • Class B: Shares Reserved for Google Insiders (e.g. Founders, Early Investors)
  • Class C: Common Shares without Voting Rights (GOOG)

Hypothetically, if the split for GOOGL were to occur in March, as of its latest closing price of $2,695, each share post-split would be priced at approximately $135 apiece.

Since Alphabet’s announcement, many investors have urged other companies with high share prices to do the same, and many are expected to follow their lead, such as Amazon and Tesla.

Alphabet’s stock split should not have a material impact on the share of its valuation — yet, considering how long-awaited the stock split was and how its shares were trading near $3,000 per share — the influx of new investors and more volume could still affect its market value.

most voted
newest oldest
Inline Feedbacks
View all comments
February 19, 2023 12:08 pm

Very clear as to the share quantity increasing while the total Value remaining the same. Now how is a dividend factored into to the equation?

Brad Barlow
February 20, 2023 1:49 pm
Reply to  Bud

Hi, Bud,

If there is a 2-for-1 stock split, the dividend would also be cut in half, just as the share price is cut in half.


The Wall Street Prep Quicklesson Series

7 Free Financial Modeling Lessons

Get instant access to video lessons taught by experienced investment bankers. Learn financial statement modeling, DCF, M&A, LBO, Comps and Excel shortcuts.