One Stop Systems (OSS) Proxy Filing summary

Board of directors and corporate governance

• Kenneth Potashner, Chairman since 2019 and director since 2006, will not stand for re-election and will serve until the May 14, 2025 Annual Meeting.

• The Board will not nominate a replacement for Mr. Potashner; all other nominees remain as stated.

• Votes for or against Mr. Potashner will be disregarded at the Annual Meeting.

• A new bylaw requires any director receiving more 'against' than 'for' votes to tender their resignation.

Voting matters and shareholder proposals

• Proxy cards and voting instructions remain valid except for Mr. Potashner's nomination, which is withdrawn.

• No other proposals in the Proxy Statement are affected by this supplement.

Shareholder rights and capital structure

• The Board reviewed super-majority voting requirements and decided to retain the two-thirds threshold in bylaws and the certificate of incorporation.

• Removing super-majority requirements would require amending and restating both governing documents.