COYA · Coya Therapeutics, Inc.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Subject to continuous service through each vesting date, the shares underlying the option will vest in monthly installments over the next 36 months. Upon a change in control of the Issuer, the shares underlying the option will vest and the option will become immediately exercisable pursuant to the Issuer's 2021 Equity Incentive Plan, as amended and restated effective November 17, 2022.

Subject to continuous service through each vesting date, the shares underlying the option will vest in monthly installments over the next 36 months. Upon a change in control of the Issuer, the shares underlying the option will vest and the option will become immediately exercisable pursuant to the Issuer's 2021 Equity Incentive Plan, as amended and restated effective November 17, 2022.

Subject to continuous service through each vesting date, the shares underlying the option will vest in monthly installments over the next 36 months. Upon a change in control of the Issuer, the shares underlying the option will vest and the option will become immediately exercisable pursuant to the Issuer's 2021 Equity Incentive Plan, as amended and restated effective November 17, 2022.

Subject to continuous service through each vesting date, the shares underlying the option will vest in monthly installments over the next 36 months. Upon a change in control of the Issuer, the shares underlying the option will vest and the option will become immediately exercisable pursuant to the Issuer's 2021 Equity Incentive Plan, as amended and restated effective November 17, 2022.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

This option is fully vested.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

The option will vest in monthly installments over 36 months commencing on February 9, 2025, subject to continuous service on each vesting date.

The option will vest in monthly installments over 36 months commencing on February 9, 2025, subject to continuous service on each vesting date.

The option will vest in monthly installments over 36 months commencing on February 9, 2025, subject to continuous service on each vesting date.

The option will vest in monthly installments over 36 months commencing on February 9, 2025, subject to continuous service on each vesting date.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Subject to continuous service, the shares subject to the option vest in equal monthly installments over a period of 36 months, commencing on July 3, 2024.

Subject to continuous service, the shares subject to the option vest in equal monthly installments over a period of 36 months, commencing on July 3, 2024.

Subject to continuous service, the shares subject to the option vest in equal monthly installments over a period of 36 months, commencing on July 3, 2024.

The option will vest in 36 equal monthly installments commencing February 29, 2024, subject to continuous service on each vesting date.

The option will vest in 36 equal monthly installments commencing February 29, 2024, subject to continuous service on each vesting date.

The option will vest in 36 equal monthly installments commencing February 29, 2024, subject to continuous service on each vesting date.

The option will vest as to 24,689 shares on July 11, 2024, with the remaining shares vesting in 24 equal monthly installments.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of appointment.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Subject to continuous service, 100% of the option will vest on the first anniversary of the date of grant.

Represents the weighted average purchase price. The actual purchase prices range from $3.59 to $3.63 per share. The Reporting Person will supply the SEC, the Issuer, or a security holder of the Issuer, with full information regarding the number of shares at each price upon request.

Subject to continuous service, 24,689 of the shares subject to the option will vest on July 17, 2024, and the remaining shares will vest in equal monthly installments over a period of 24 months commencing on August 17, 2024.

Subject to continuous service, the shares subject to the option vest in equal monthly installments over a period of 36 months commencing on March 27, 2023.