Costar Group (CSGP) stock split history
Costar Group has split its stock once since 2021. The latest was a 10-for-1 split on 28 Jun 2021: each share held before became 10 shares. The close on 25 Jun 2021 was $882.65 and the first close on or after the effective date, 28 Jun 2021, was $84.92 (prices as traded). Below: every split, what it did to the share count, and the chart with splits marked.
All CSGP stock splits
| Effective date | Split | Close before | First close after | Shares today per 1 held before |
|---|---|---|---|---|
| 28 Jun 2021 | 10-for-1 | $882.65 | $84.92 | 10 |
Split is new shares for old shares: in a 10-for-1 split one share becomes ten. Close before is the last close before the effective date and first close after is the first close on or after it, both as traded in CSGP's own history (not adjusted), so the two differ by about the split ratio plus that day's market move. Shares today shows how many shares one share held just before that split has become after it and every later split. Dates and ratios: EODHD.
CSGP price chart with splits marked
The chart shows split-adjusted prices, so the price does not jump on a split date; each split is marked on the date axis. Use the buttons to change the range.
How to read CSGP's split history
A stock split changes the number of shares and the price per share by the same factor, so the value of a holding stays the same on the day. Costar Group's 10-for-1 split on 28 Jun 2021 is the latest in our data: each share held before became 10 shares.
A split does not change what a company earns or what it is worth. Per-share figures such as earnings and dividends per share are restated by the ratio, which is why old prices look different in an adjusted chart than in the newspaper of the day. The CSGP stock page has the current score and fair value range, and the CSGP price history lists daily prices with both as-traded and adjusted closes.
Recent splits in the same sector: Real Estate
| Company | Latest split | Date |
|---|---|---|
| IRM Iron Mountain | 3-for-2 | 3 Jan 2007 |
| CBRE Cbre Group | 3-for-1 | 2 Jun 2006 |
| KIM Kimco Realty | 2-for-1 | 24 Aug 2005 |
| O Realty Income | 2-for-1 | 3 Jan 2005 |
| DOC Healthpeak Properties | 2-for-1 | 2 Mar 2004 |
| VMRK Vivmark Residential | 2-for-1 | 12 Oct 2001 |
| UDR UDR | 2-for-1 | 6 May 1993 |
Frequently asked questions
When did Costar Group last split its stock?
The last CSGP stock split in our data took effect on 28 Jun 2021. It was a 10-for-1 split: each share held before became 10 shares. The close on 25 Jun 2021 was $882.65 and the first close on or after the effective date, 28 Jun 2021, was $84.92 (prices as traded).
How many times has Costar Group split its stock?
Costar Group (CSGP) has had 1 stock split since 28 Jun 2021 in our data, which goes back to 1990. One share held just before it is 10 shares today.
Has Costar Group announced a new stock split?
Our data lists no split for CSGP after 28 Jun 2021 and no announced future one as of 22 Oct 2026. A company announces a split first, usually together with earnings or in a filing, and the split takes effect weeks later. The company's 8-K filings and press releases are the primary source.
What does a 10-for-1 split mean for shareholders?
In a 10-for-1 split the number of shares goes up and the price per share goes down by the same factor: each share held before became 10 shares. The total value of a holding is not changed by the split itself; it only changes with the market price afterwards.
Does a stock split change what a company is worth?
No. A split cuts the same company into more (or fewer) pieces, so market value, earnings and dividends per share are all restated by the ratio. Charts and per-share figures in our data are adjusted for splits so that past and present prices can be compared.
Where does this split data come from?
Split dates and ratios come from EODHD. The closing prices around each split are the as-traded closes in our database. Feed entries that are only price-adjustment factors for spin-offs or special distributions are not counted as splits.
Related
Educational information, not financial advice. Split data to 22 Oct 2026; a company can announce a split at any time.