COMP · Compass, Inc.

Automatic sales by The Ruth Reffkin Family Trust pursuant to a Rule 10b5-1 plan adopted on March 3, 2026.

The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $12.22 to $12.68 per share, inclusive. The Ruth Reffkin Family Trust undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Represents (i) 4,148,000 shares of Class A Common Stock owned by the 2021 Reffkin Remainder Interest Trust, (ii) 3,190,870 shares of Class A Common Stock owned by the Reffkin Investment II Corp, (iii) 364,199 shares of Class A Common Stock owned by The Ruth Reffkin Family Trust and (iv) 78,135 shares of Class A Common Stock owned by the Reffkin 2022 Family Trust.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSU award vests as to 8.33% on December 15, 2025, 6.25% quarterly thereafter through June 15, 2029, and 4.17% on August 15, 2029, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs vest as to 6.25% of the total shares on December 15, 2025 and 6.25% quarterly thereafter, with 100% of the total shares vested on September 15, 2029, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs vest as to 6.25% of the total shares on June 15, 2026 and 6.25% quarterly thereafter, with 100% of the total shares vested on March 15, 2030, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs vest as to 25% of the total shares on each of December 15, 2025, March 15, 2026, June 15, 2026 and September 15, 2026, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

Represents shares withheld by Issuer to satisfy tax withholding obligations on the vesting of RSUs.

Represents shares withheld by Issuer to satisfy tax withholding obligations on the vesting of RSUs.

Represents shares withheld by Issuer to satisfy tax withholding obligations on the vesting of RSUs.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs vest as to 36,895 shares on March 15, 2026; 27,671 shares on each of June 15, 2026 and September 15, 2026; 27,672 shares on December 15, 2026; 23,243 shares on March 15, 2027; 23,244 shares on each of June 15, 2027, September 15, 2027, and December 15, 2027; 15,864 shares on March 15, 2028; and 15,865 shares on each of June 15, 2028, September 15, 2028, and December 15, 2028; and 7,010 shares on each of March 15, 2029, June 15, 2029, September 15, 2029, and December 15, 2029, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

Represents a bona fide gift to McCarter Living Trust.

Represents a bona fide gift to McCarter Living Trust.

The Reporting Person and his spouse are both trustees and beneficiaries of McCarter Living Trust.

Automatic sales by The Ruth Reffkin Family Trust pursuant to a Rule 10b5-1 plan adopted on March 3, 2026.

The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.27 to $8.30 per share, inclusive. The Ruth Reffkin Family Trust undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Represents (i) 4,148,000 shares of Class A Common Stock owned by the 2021 Reffkin Remainder Interest Trust, (ii) 3,190,870 shares of Class A Common Stock owned by the Reffkin Investment II Corp, (iii) 387,655 shares of Class A Common Stock owned by The Ruth Reffkin Family Trust and (iv) 78,135 shares of Class A Common Stock owned by the Reffkin 2022 Family Trust.

Automatic sales by The Ruth Reffkin Family Trust pursuant to a Rule 10b5-1 plan adopted on March 3, 2026.

The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $7.27 to $8.26 per share, inclusive. The Ruth Reffkin Family Trust undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

Represents (i) 4,148,000 shares of Class A Common Stock owned by the 2021 Reffkin Remainder Interest Trust, (ii) 3,190,870 shares of Class A Common Stock owned by the Reffkin Investment II Corp, (iii) 388,255 shares of Class A Common Stock owned by The Ruth Reffkin Family Trust and (iv) 78,135 shares of Class A Common Stock owned by the Reffkin 2022 Family Trust.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs shall vest 100% on the earlier of (i) the date of the next annual meeting of the Company's stockholders and (ii) May 22, 2026.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs shall vest 100% on the earlier of (i) the date of the next annual meeting of the Company's stockholders and (ii) May 22, 2026.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs shall vest 100% on the earlier of (i) the date of the next annual meeting of the Company's stockholders and (ii) May 14, 2027.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs shall vest 100% on the earlier of (i) the date of the next annual meeting of the Company's stockholders and (ii) May 14, 2027.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs shall vest as to 25% of the total shares on each of August 1, 2026, November 1, 2026, February 1, 2027, and May 1, 2027; and if not fully vested, will vest in full on the date of the next annual meeting of the Company's stockholders.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs shall vest 100% on the earlier of (i) the date of the next annual meeting of the Company's stockholders and (ii) May 14, 2027.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs shall vest 100% on the earlier of (i) the date of the next annual meeting of the Company's stockholders and (ii) May 22, 2026.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The Reporting Person has elected to defer receipt of 100% of the RSUs reported herein pursuant to the Compass, Inc. Deferred Compensation Plan for Directors and Employees. The deferred RSUs will be settled in shares of Class A Common Stock in accordance with the terms of the Plan and the Reporting Person's deferral election.

The RSUs shall vest 100% on the earlier of (i) the date of the next annual meeting of the Company's stockholders and (ii) May 14, 2027.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs shall vest 100% on the earlier of (i) the date of the next annual meeting of the Company's stockholders and (ii) May 14, 2027.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs shall vest 100% on the earlier of (i) the date of the next annual meeting of the Company's stockholders and (ii) May 22, 2026.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs shall vest 100% on the earlier of (i) the date of the next annual meeting of the Company's stockholders and (ii) May 22, 2026.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs shall vest 100% on the earlier of (i) the date of the next annual meeting of the Company's stockholders and (ii) May 22, 2026.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs shall vest 100% on the earlier of (i) the date of the next annual meeting of the Company's stockholders and (ii) May 14, 2027.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs shall vest 100% on the earlier of (i) the date of the next annual meeting of the Company's stockholders and (ii) May 14, 2027.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs shall vest 100% on the earlier of (i) the date of the next annual meeting of the Company's stockholders and (ii) May 22, 2026.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs shall vest as to 25% of the total shares on each of August 1, 2025, November 1, 2025, February 1, 2026, and May 1, 2026; and if not fully vested, will vest in full on the date of the next annual meeting of the Company's stockholders.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs vest as to 100% of the total shares on December 31, 2027, subject to the Reporting Person's provision of service to the Issuer through that date.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs vest as to 50% of the total shares on each of February 28, 2027 and February 28, 2028, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

Each PSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The financial metrics of the PSUs were certified as being achieved on March 23, 2026 and the stock price condition requiring that the arithmetic average of the volume weighted average trading price of the Issuer's Class A Common Stock exceeds $10.575 in any 30 trading-day window was certified on February 6, 2026. The PSUs vested as to 50% of the total shares on March 23, 2026 and the remaining 50% will vest on August 15, 2027, subject to the Reporting Person's provision of service to the Issuer through that date.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs vest as to 100% of the total shares on February 22, 2027, subject to the Reporting Person's provision of service to the Issuer through that date.

Each PSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The financial metrics of the PSUs were certified as being achieved on March 23, 2026 and the stock price condition requiring that the arithmetic average of the volume weighted average trading price of the Issuer's Class A Common Stock exceeds $10.575 in any 30 trading-day window was certified on February 6, 2026. The PSUs vested as to 50% of the total shares on March 23, 2026 and the remaining 50% will vest on August 15, 2027, subject to the Reporting Person's provision of service to the Issuer through that date.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs vest as to 25% of the total shares on each of March 15, 2027, March 15, 2028, March 15, 2029 and March 15, 2030, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

Represents shares withheld by Issuer to satisfy tax withholding obligations on the vesting of PSUs.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs vest as to 6.25% of the total shares on June 15, 2026 and 6.25% quarterly thereafter, with 100% of the total shares vested on March 15, 2030, subject to the Reporting Person's provision of service to the Issuer on each vesting date.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs vest as to 100% of the total shares on December 31, 2026, subject to the Reporting Person's provision of service to the Issuer through that date.

Each RSU represents a contingent right to receive one (1) share of the Issuer's Class A Common Stock upon settlement.

The RSUs vest as to 25% of the total shares on each of March 15, 2027, March 15, 2028, March 15, 2029 and March 15, 2030, subject to the Reporting Person's provision of service to the Issuer on each vesting date.