SEER · Seer, Inc.

Shares subject to the option vest on the earlier of (i) July 28, 2027 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

The reported shares are represented by restricted stock units, or RSUs, which vest on the earlier of (i) July 28, 2027 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

The reported shares are represented by restricted stock units, or RSUs, which vest on the earlier of (i) July 28, 2027 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

Shares subject to the option vest on the earlier of (i) July 28, 2027 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

Shares subject to the option vest on the earlier of (i) July 28, 2027 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

The reported shares are represented by restricted stock units, or RSUs, which vest on the earlier of (i) July 28, 2027 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

Shares subject to the option vest on the earlier of (i) July 28, 2027 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

The reported shares are represented by restricted stock units, or RSUs, which vest on the earlier of (i) July 28, 2027 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

The reported shares are represented by restricted stock units, or RSUs, which vest on the earlier of (i) July 28, 2027 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

Shares subject to the option vest on the earlier of (i) July 28, 2027 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

The reported shares are represented by restricted stock units, or RSUs, which vest on the earlier of (i) July 28, 2027 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

Shares subject to the option vest on the earlier of (i) July 28, 2027 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 8, 2025 to cover tax obligations upon the vesting and settlement of restricted stock units.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.17 to $2.22, inclusive. The reporting person undertakes to provide 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.

The reported shares were sold to satisfy the reporting person's tax obligations in connection with the vesting of restricted stock units, or RSUs.

One-fourth of the shares subject to the option vest on May 4, 2027 and 1/48th vest monthly thereafter.

The reported shares are represented by restricted stock units, or RSUs, which vest in four equal annual installments beginning on May 15, 2027.

The reported shares were sold to satisfy the reporting person's tax obligations in connection with the vesting of restricted stock units, or RSUs.

The reported shares were sold to satisfy the reporting person's tax obligations in connection with the vesting of restricted stock units, or RSUs.

The reported shares are represented by restricted stock units, or RSUs, which vest in 16 equal quarterly installments beginning on May 15, 2026.

One-fourth of the shares subject to the option vest on February 3, 2027 and 1/48th of the shares vest monthly thereafter.

The reported shares are represented by restricted stock units, or RSUs, which vest in 16 equal quarterly installments beginning on May 15, 2026.

One-fourth of the shares subject to the option vest on February 3, 2027 and 1/48th of the shares vest monthly thereafter.

Pursuant to the Issuer's amended and restated certificate of incorporation, as amended, each share of the Issuer's Class B Common Stock automatically converted into one share of Class A Common Stock at the close of business on the first day following the fifth anniversary of the closing of the Issuer's initial public offering.

The reported shares are held of record by SAF-BND Trust for which the reporting person's spouse serves as trustee. The reporting person disclaims beneficial ownership of these securities, except to the extent of any pecuniary interest therein, and the filing of this report is not an admission that the reporting person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.

Pursuant to the Issuer's amended and restated certificate of incorporation, as amended, each share of the Issuer's Class B Common Stock automatically converted into one share of Class A Common Stock at the close of business on the first day following the fifth anniversary of the closing of the Issuer's initial public offering.

Pursuant to the Issuer's amended and restated certificate of incorporation, as amended, each share of the Issuer's Class B Common Stock automatically converted into one share of Class A Common Stock at the close of business on the first day following the fifth anniversary of the closing of the Issuer's initial public offering.

The reported shares are held of record by Strong Bridge, LLC for which the Reporting Person serves as an operating manager.

Pursuant to the Issuer's amended and restated certificate of incorporation, as amended, each share of the Issuer's Class B Common Stock automatically converted into one share of Class A Common Stock at the close of business on the first day following the fifth anniversary of the closing of the Issuer's initial public offering.

The reported shares are held of record by SAF-BND Trust for which the reporting person's spouse serves as trustee. The reporting person disclaims beneficial ownership of these securities, except to the extent of any pecuniary interest therein, and the filing of this report is not an admission that the reporting person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.

Pursuant to the Issuer's amended and restated certificate of incorporation, as amended, each share of the Issuer's Class B Common Stock automatically converted into one share of Class A Common Stock at the close of business on the first day following the fifth anniversary of the closing of the Issuer's initial public offering.

The reported shares are held of record by Strong Bridge, LLC for which the Reporting Person serves as an operating manager.

Pursuant to the Issuer's amended and restated certificate of incorporation, as amended, each share of the Issuer's Class B Common Stock automatically converted into one share of Class A Common Stock at the close of business on the first day following the fifth anniversary of the closing of the Issuer's initial public offering.

Includes 1,303,478 shares previously reported as held of record by Dynamics Group LLC for which the reporting person serves as the sole member ("Dynamics") which were re-registered on September 25, 2024 and are now held of record by the reporting person.

The reported shares were sold to satisfy the reporting person's tax obligations in connection with the vesting of restricted stock units, or RSUs.

The reported shares were sold to satisfy the reporting person's tax obligations in connection with the vesting of restricted stock units, or RSUs.

The reported shares are represented by restricted stock units, or RSUs, which vest in three equal annual installments beginning on September 2, 2026.

The shares subject to the option vest in three equal annual installments beginning on September 2, 2026.

The reported shares were sold to satisfy the reporting person's tax obligations in connection with the vesting of restricted stock units, or RSUs.

The reported shares were sold to satisfy the reporting person's tax obligations in connection with the vesting of restricted stock units, or RSUs.

The reported shares are represented by restricted stock units, or RSUs, which vest on the earlier of (i) July 7, 2026 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

Shares subject to the option vest on the earlier of (i) July 7, 2026 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

Shares subject to the option vest on the earlier of (i) July 7, 2026 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

The reported shares are represented by restricted stock units, or RSUs, which vest on the earlier of (i) July 7, 2026 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

Shares subject to the option vest on the earlier of (i) July 7, 2026 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

The reported shares are represented by restricted stock units, or RSUs, which vest on the earlier of (i) July 7, 2026 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

Shares subject to the option vest on the earlier of (i) July 7, 2026 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

The reported shares are represented by restricted stock units, or RSUs, which vest on the earlier of (i) July 7, 2026 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

The reported shares are represented by restricted stock units, or RSUs, which vest on the earlier of (i) July 7, 2026 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

Shares subject to the option vest on the earlier of (i) July 7, 2026 or (ii) the day prior to the date of the Issuer's next annual meeting of stockholders.

The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 4, 2024.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.055 to $2.10, inclusive. The reporting person undertakes to provide 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.

The reported shares were sold to satisfy the reporting person's tax obligations in connection with the vesting of restricted stock units, or RSUs.

The reported shares were sold to satisfy the reporting person's tax obligations in connection with the vesting of restricted stock units, or RSUs.

The reported shares were withheld to satisfy the reporting person's tax liability in connection with the vesting of restricted stock units, or RSUs.