How many times has Comcast (CMCSA) split its stock?

Our data shows 12 stock splits for Comcast (CMCSA). See the table on this page for dates and ratios.

What is a stock split?

A stock split increases the number of shares outstanding while proportionally lowering the share price, so market capitalization is unchanged. Chart and return tools often use split-adjusted prices. The split table on this page refreshes daily from our corporate-actions data.

What is the cumulative split multiple for CMCSA?

Multiplying each split factor in chronological order gives a cumulative multiple of about 230.6602 from the oldest split through the most recent one in our table.

Does a stock split change the value of my CMCSA investment?

A split does not change the total market value of your holding by itself; you own more shares at a lower per-share price. Dividends per share and some per-share metrics are often adjusted for splits.

Stock split history for Comcast (CMCSA)

Comcast stock (symbol: CMCSA) underwent a total of 12 stock splits.

The most recent stock split occurred on February 21, 2017.

One CMCSA share bought prior to May 16, 1980 would equal 230.6602 CMCSA shares today.

The same share count applies to one share bought at IPO on March 17, 1980.

Comcast

CMCSA

Stock splits history (since IPO on March 17, 1980)

Cumulative multiple is the running product of split factors from the chronologically oldest row through each date. Rows are listed newest-first, so the cumulative column reads forward in time from the bottom of the table toward the top.

Date	Type	Split	Multiple	Cumulative multiple	Pre-split price	Post-split price
February 21, 2017	Stock split	2:1	x2	x230.6602	$75.32	$38.03
February 22, 2007	Stock split	3:2	x1.5	x115.3301	$41.70	$27.86
May 6, 1999	Stock split	2:1	x2	x76.8867	$73.32	$36.57
February 3, 1994	Stock split	3:2	x1.5	x38.4434	$31.59	$21
October 25, 1989	Stock split	3:2	x1.5	x25.6289	$27.54	$18.63
April 11, 1988	Stock split	3:2	x1.5	x17.0859	$27.34	$18.50
December 19, 1986	Stock split	3:2	x1.5	x11.3906	$27	$18.25
June 28, 1985	Stock split	3:2	x1.5	x7.5938	$30.13	$20.88
September 19, 1984	Stock split	3:2	x1.5	x5.0625	$27.75	$19.13
January 6, 1983	Stock split	3:2	x1.5	x3.375	$27	$19.25
April 13, 1981	Stock split	3:2	x1.5	x2.25	$32.75	$21.75
May 16, 1980	Stock split	3:2	x1.5	x1.5	$26.50	$18.75

February 21, 2017

Type: Stock split
Split: 2:1
Multiple: x2
Cumulative multiple: x230.6602
Pre-split price: $75.32
Post-split price: $38.03

February 22, 2007

Type: Stock split
Split: 3:2
Multiple: x1.5
Cumulative multiple: x115.3301
Pre-split price: $41.70
Post-split price: $27.86

May 6, 1999

Type: Stock split
Split: 2:1
Multiple: x2
Cumulative multiple: x76.8867
Pre-split price: $73.32
Post-split price: $36.57

February 3, 1994

Type: Stock split
Split: 3:2
Multiple: x1.5
Cumulative multiple: x38.4434
Pre-split price: $31.59
Post-split price: $21

October 25, 1989

Type: Stock split
Split: 3:2
Multiple: x1.5
Cumulative multiple: x25.6289
Pre-split price: $27.54
Post-split price: $18.63

April 11, 1988

Type: Stock split
Split: 3:2
Multiple: x1.5
Cumulative multiple: x17.0859
Pre-split price: $27.34
Post-split price: $18.50

December 19, 1986

Type: Stock split
Split: 3:2
Multiple: x1.5
Cumulative multiple: x11.3906
Pre-split price: $27
Post-split price: $18.25

June 28, 1985

Type: Stock split
Split: 3:2
Multiple: x1.5
Cumulative multiple: x7.5938
Pre-split price: $30.13
Post-split price: $20.88

September 19, 1984

Type: Stock split
Split: 3:2
Multiple: x1.5
Cumulative multiple: x5.0625
Pre-split price: $27.75
Post-split price: $19.13

January 6, 1983

Type: Stock split
Split: 3:2
Multiple: x1.5
Cumulative multiple: x3.375
Pre-split price: $27
Post-split price: $19.25

April 13, 1981

Type: Stock split
Split: 3:2
Multiple: x1.5
Cumulative multiple: x2.25
Pre-split price: $32.75
Post-split price: $21.75

May 16, 1980

Type: Stock split
Split: 3:2
Multiple: x1.5
Cumulative multiple: x1.5
Pre-split price: $26.50
Post-split price: $18.75

Pre-split price is the final regular-session close on a trading day strictly before the split calendar date. Post-split price is the first session open on or after that date. Both values come from unadjusted end-of-day bars for the company's primary listing.

The Type column reflects the data feed's event category (for example stock split vs stock dividend). When the feed labels a generic split but the ratio is reverse (e.g. 1:10), we show reverse stock split. Optional editorial context for a row appears next to the split ratio as an info icon (hover or keyboard focus on desktop; tap on mobile). The same text is listed under Row notes when that block is expanded.

Wondering why some rows show ratios like 51:50 or 2000:1973? Read: stock split ratios explained →How the cumulative column is computed: cumulative split multiplier explained. For ratios driven by spin-offs, see spin-offs explained. Or read the methodology for how prices and cumulative multiples are computed.

Stock splits for companies in the Communication Services sector

8 peers sorted by market cap

Compare split histories across large names in the same sector. Each ticker links to its own split table; the list excludes ETFs and funds and follows our daily company snapshot.

Ticker	Company	Market cap
GOOGL	Alphabet Inc.	$4.23T
META	Meta Platforms, Inc.	$1.70T
NFLX	Netflix, Inc.	$388.53B
TMUS	T-Mobile US, Inc.	$205.74B
VZ	Verizon Communications Inc.	$199.24B
T	AT&T Inc.	$181.99B
DIS	The Walt Disney Company	$179.77B
SPOT	Spotify Technology S.A.	$89.39B

Frequently asked questions

How many times has Comcast (CMCSA) split its stock?: Our data shows 12 stock splits for Comcast (CMCSA). See the table on this page for dates and ratios.
What is a stock split?: A stock split increases the number of shares outstanding while proportionally lowering the share price, so market capitalization is unchanged. Chart and return tools often use split-adjusted prices. The split table on this page refreshes daily from our corporate-actions data.
What is the cumulative split multiple for CMCSA?: Multiplying each split factor in chronological order gives a cumulative multiple of about 230.6602 from the oldest split through the most recent one in our table.
Does a stock split change the value of my CMCSA investment?: A split does not change the total market value of your holding by itself; you own more shares at a lower per-share price. Dividends per share and some per-share metrics are often adjusted for splits.