Insider Trading Arrangements

3 Months Ended

Sep. 30, 2026

shares

Mr. Stephen W. Beard

Trading Arrangements, by Individual

Material Terms of Trading Arrangement

On September 14, 2026, Mr. Stephen W. Beard, Covista’s Chairman and Chief Executive Officer, adopted a 10b5-1 Preset Diversification Program (the “New 10b5-1 Plan”). Mr. Beard’s New 10b5-1 Plan is a continuation of his current 10b5-1 Plan entered into on December 10, 2025, which expires on November 30, 2026 (the “Current Plan”). The New 10b5-1 Plan provides for the sale of Covista common stock that has not been sold under Mr. Beard’s Current Plan. Mr.

Beard’s New 10b5-1 Plan is intended to satisfy the affirmative defense of Rule 10b5-1(c). Trades under Mr. Beard’s New 10b5-1 Plan are subject to the required “cooling-off” period with the estimated first sale date under Mr. Beard’s New 10b5-1 Plan to occur not before December 15, 2026, after the expiration of his Current Plan. Mr. Beard’s New 10b5-1 Plan expires on May 28, 2027. The New 10b5-1 Plan governs Mr. Beard’s sale of 112,859 shares of Covista common stock. After such sales, Mr. Beard would continue to satisfy the stock ownership requirements for our executive officers. Transactions under the New 10b5-1 Plan will be disclosed publicly through Form 144 and Form 4 filings with the SEC to the extent required by law.

Name

Mr. Stephen W. Beard

Title

Chairman and Chief Executive Officer

Rule 10b5-1 Arrangement Adopted

true

Adoption Date

September 14, 2026

Expiration Date

May 28, 2027

Aggregate Available

112,859

Mr. Robert Phelan

Trading Arrangements, by Individual

Material Terms of Trading Arrangement

On September 14, 2026, Mr. Robert Phelan, Covista’s Senior Vice President and Chief Financial Officer, adopted a 10b5-1 Plan. Mr. Phelan’s 10b5-1 Plan is intended to satisfy the affirmative defense of Rule 10b5-1(c). Trades under Mr. Phelan’s 10b5-1 Plan are subject to the required “cooling-off period” with the estimated first sale date under Mr. Phelan’s 10b5-1 Plan to occur not before December 15, 2026. Mr. Phelan’s 10b5-1 Plan expires on September 24, 2027. The 10b5-1 Plan governs Mr. Phelan’s sale of 22,000 shares of Covista common stock. After such sales, Mr. Phelan would continue to satisfy the stock ownership requirements for our executive officers. Transactions under the 10b5-1 Plan will be disclosed publicly through Form 144 and Form 4 filings with the SEC to the extent required by law.

Name

Mr. Robert Phelan

Title

Senior Vice President and Chief Financial Officer

Rule 10b5-1 Arrangement Adopted

true

Adoption Date

September 14, 2026

Expiration Date

September 24, 2027

Aggregate Available

22,000