Percentage of purchase price of company's common stock to the market price

COSTAR GROUP, INC.NOTES TO CONSOLIDATED FINANCIAL STATEMENTS  
or commission is earned. The Company granted 40,960 and 33,840 DSUs during the years 2021 and 2020, respectively. The expense related to the Matching RSUs is recognized over the four-year vesting period following the grant date.   
The following tables presents the Matching RSU activity for the year ended December 31, 2021:

|  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
|  |  |  |  |  |  |  |  |  |  |  |  |
|   | Number of Matching RSUShares(1) |  | Weighted-AverageGrant DateFair Value per Share(1) |
| Unvested MSPP restricted stock units at December 31, 2020 | 93,170  |  |  | $ | 53.12  |  |
| Granted | 40,960  |  |  | $ | 83.79  |  |
|  |  |  |  |
| Canceled | (18,040) |  |  | $ | 61.36  |  |
| Unvested MSPP restricted stock units at December 31, 2021 | 116,090  |  |  | $ | 62.66  |  |

(1) Prior period amounts have been retroactively adjusted to reflect the ten-for-one stock split effected in the form of a stock dividend in June 2021.  
Employee 401(k) Plan  
The Company maintains a 401(k) Plan (the “401(k)”) as a defined contribution retirement plan for all eligible employees. The 401(k) provides for tax-deferred contributions of employees’ salaries, limited to a maximum annual amount as established by the IRS. In addition to the traditional 401(k), effective January 1, 2015, eligible employees have the option of making an after-tax contribution to a Roth 401(k) plan or a combination of both. In 2021, 2020 and 2019, the Company matched 100% of employee contributions up to a maximum of 4% of total compensation. Amounts contributed to the 401(k) by the Company to match employee contributions for the years ended December 31, 2021, 2020 and 2019 were approximately $18 million, $15 million and $12 million, respectively. The Company had no administrative expenses in connection with the 401(k) plan for the years ended December 31, 2021, 2020 and 2019. Employee Pension Plan The Company maintains a Group Personal Pension Plan (the “Plan”) for all eligible employees in the Company’s U.K. offices. The Plan is a defined contribution plan. Employees are eligible to contribute a portion of their salaries, subject to a maximum annual amount as established by Her Majesty's Revenue and Customs. In 2021, 2020 and 2019, the Company's matching contribution was based on the percentage contributed by the employee, up to a maximum of 6% of total compensation. Amounts contributed to the Plan by the Company to match employee contributions for the years ended December 31, 2021, 2020 and 2019, were approximately $0.9 million, $0.9 million and $0.6 million, respectively.  
Registered Retirement Savings Plan  
As of January 1, 2015, the Company introduced a registered retirement savings plan (“RRSP”) for all eligible employees in the Company’s Canadian offices. In 2021, 2020 and 2019, the Company matched 100% of employee contributions up to a maximum of 4% of total compensation. Amounts contributed to the RRSP by the Company to match employee contributions were approximately $0.1 million for the years ended December 31, 2021, 2020 and 2019.  
 Employee Stock Purchase Plan As of August 1, 2006, the Company introduced an Employee Stock Purchase Plan (“ESPP”), pursuant to which eligible employees participating in the plan authorize the Company to withhold specified amounts from the employees’ compensation and use the withheld amounts to purchase shares of the Company's common stock at 90% of the market price. Participating employees are able to purchase common stock under this plan during each offering period. An offering period begins the second Saturday before each of the Company’s regular pay dates and ends on each of the Company’s regular pay dates. On June 2, 2021, the Company’s stockholders approved an amendment to the ESPP to increase the number of shares available for purchase under the ESPP by 1 million shares. The Company registered the issuance of these additional shares under the ESPP pursuant to the registration statement filed on July 28, 2021. There were 1,233,863 and 385,910 shares available for purchase under the ESPP as of December 31, 2021 and 2020, respectively, and approximately 152,047 and 129,930 shares of the Company’s common stock were purchased under the ESPP during 2021 and 2020, respectively.   
F-4