ATER · Aterian, Inc.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

The reported award was granted outside of the Company's regular annual equity grant cycle and was approved by the Compensation Committee for retention purposes.

On April 27, 2026, David E. Lazar (the "Reporting Person") and Aterian, Inc. (the "Company") entered into a Securities Purchase Agreement (the "Purchase Agreement") pursuant to which the Reporting Person acquired 1,750,000 shares of Series AA Convertible Non-Redeemable Preferred Stock (the "Series AA Preferred Shares"), at a price of $2.00 per share, for a total purchase price of $3,500,000. Pursuant to the Purchase Agreement, the Reporting Person will also acquire, at a subsequent closing promptly following the receipt of Stockholder Approval (as defined below), 1,750,000 shares of Series AAA Convertible Non-Redeemable Preferred Stock (the "Series AAA Preferred Shares" and, together with the Series AA Preferred Shares, the "Preferred Shares"), at a price of $2.00 per share, for an additional purchase price of $3,500,000.

The Preferred Shares are not convertible into common stock until stockholders approve the issuance of common stock upon conversion in compliance with Nasdaq rules and an increase in authorized common stock, and the Company files a corresponding charter amendment (the "Stockholder Approvals"). The closing on the Series AAA Preferred Shares is also subject to stockholder approval of additional matters, including the election of Reporting Person designees to the Board and a reverse stock split. Following the Stockholder Approval, each Series AA Preferred Share will be convertible into 7.7 shares of common stock, and each Series AAA Preferred Share will be convertible into a minimum of 117.63 and maximum of 135.10 shares of common stock, based on the Company's fully-diluted capitalization as determined under the Purchase Agreement.

Following receipt by the Company of the Stockholder Approval, the Preferred Shares will be convertible into shares of common stock at the option of the Reporting Person for no additional consideration.

Each class of Preferred Stock is perpetual and therefore has no expiration date.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

The reported award was granted outside of the Company's regular annual equity grant cycle and was approved by the Compensation Committee for retention purposes.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

The reported award was granted in lieu of cash compensation for the reporting person's service as a member of the Board of Directors.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

The reported award was granted outside of the Company's regular annual equity grant cycle and was approved by the Compensation Committee for retention purposes.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

The reported award was granted in lieu of cash compensation for the reporting person's service as a member of the Board of Directors.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

The reported award was granted in lieu of cash compensation for the reporting person's service as a member of the Board of Directors.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

The shares were sold by the Reporting Person for tax related purposes.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.22 to $1.23, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

The shares were sold by the Reporting Person for tax related purposes.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.22 to $1.23, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

The shares were sold by the Reporting Person for tax related purposes.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.22 to $1.23, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

The shares were sold by the Reporting Person for tax related purposes.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.32 to $1.35, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

The shares were sold by the Reporting Person for tax related purposes.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.31 to $1.35, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

The shares were sold by the Reporting Person for tax related purposes.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.32 to $1.37, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

The shares were sold by the Reporting Person for tax related purposes.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.38 to $1.40, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

The shares were sold by the Reporting Person for tax related purposes.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.40 to $1.44, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.65 to $1.71, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

Shares were automatically sold by the Reporting Person solely to satisfy tax withholding obligations upon the vesting of restricted stock awards.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.33 to $2.39, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

Shares were automatically sold by the Reporting Person solely to satisfy tax withholding obligations upon the vesting of restricted stock awards.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.33 to $2.39, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

Shares were automatically sold by the Reporting Person on a non-discretionary basis solely to satisfy tax withholding obligations upon the vesting of restricted stock awards.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.04 to $3.09, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

Shares were automatically sold by the Reporting Person on a non-discretionary basis solely to satisfy tax withholding obligations upon the vesting of restricted stock awards.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.04 to $3.12, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

Shares were automatically sold by the Reporting Person on a non-discretionary basis solely to satisfy tax withholding obligations upon the vesting of restricted stock awards.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.04 to $3.14, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

Shares were automatically sold by the Reporting Person on a non-discretionary basis solely to satisfy tax withholding obligations upon the vesting of restricted stock awards.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.04 to $3.12, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

The shares were sold by the Reporting Person for tax related purposes.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $2.99 to $3.07, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

Due to an administrative error that failed to account for the 12-1 reverse split that was affected on March 20, 2024, the total number of securities owned in the Form 4 for this Reporting Person filed on August 16, 2024 reported an incorrect number of total securities owned.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

Due to an administrative error that failed to account for the 12-1 reverse split that was affected on March 20, 2024, the total number of securities owned in the Form 4 for this Reporting Person filed on August 16, 2024 reported an incorrect number of total securities owned.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

The shares were sold by the Reporting Person for tax related purposes.

The shares were sold by the Reporting Person for tax related purposes.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.00 to $3.10, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

Comprised of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

Shares were automatically sold by the Reporting Person on a non-discretionary basis solely to satisfy tax withholding obligations upon the vesting of restricted stock awards.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.41 to $0.44, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.30 to $0.32, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

Shares were automatically sold by the Reporting Person on a non-discretionary basis solely to satisfy tax withholding obligations upon the vesting of restricted stock awards.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.29 to $0.31, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.33 to $0.35, inclusive. The reporting person undertakes to provide Aterian, Inc. the Company, any security holder of the Company, 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 herein in this footnote.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.32 to $0.38, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $0.33 to $0.38, inclusive. The reporting person undertakes to provide Aterian, Inc. (the "Company"), any security holder of the Company, 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 herein in this footnote.

Comprised solely of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.

Comprised solely of shares of restricted common stock granted pursuant to the Issuer's 2018 Equity Incentive Plan that are subject to vesting.