BETA Technologies, Inc.

Trading Arrangements

On August 14, 2026, The Godric’s Hollow Trust, an entity affiliated with Kyle Clark, the Company’s Chief Executive Officer and President, entered into a trading plan (the “August Trading Plan”) intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act that provides for the potential sale of up to 300,000 shares of Class A common stock, subject to certain conditions, from November 13, 2026 through December 14, 2026 (after the completion or expiration of the earlier-commencing arrangements previously disclosed in the Company’s Quarterly Reports on Form 10-Q for the three and six months ended March 31, 2026 and June 30, 2026, respectively). On September 11, 2026, The Godric’s Hollow Trust entered into a trading plan (the “September 11 Trading Plan”) intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act that provides for the potential sale of up to 250,000 shares of Class A common stock, subject to certain conditions, from December 15, 2026 through January 11, 2027 (after the completion or expiration of the earlier-commencing arrangements, including the August Trading Plan and those previously disclosed in the Company’s Quarterly Reports on Form 10-Q for the three and six months ended March 31, 2026 and June 30, 2026, respectively). Additionally, on September 29, 2026, Mr. Clark entered into trading plans on behalf of himself and The Godric’s Hollow Trust intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act (collectively, the “September 29 Trading Plans”). The September 29 Trading Plans provide for the potential sale of up to 270,000 shares of Class A common stock, with 27.5% of the shares to be sold by Kyle Clark and 72.5% of the shares to be sold by The Godric’s Hollow Trust, subject to certain conditions, from January 12, 2027 through February 22, 2027 (after the completion or expiration of the earlier-commencing arrangements, including the September 11 Trading Plan and those previously disclosed in the Company’s Quarterly Reports on Form 10-Q for the three and six months ended March 31, 2026 and June 30, 2026, respectively).

On August 17, 2026, Herman Cueto, the Company’s Chief Financial Officer, entered into a trading plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) under the Exchange Act. Mr. Cueto’s trading plan provides for the potential sale of up to 216,661 shares of Class A common stock, including upon the vesting of RSUs and PSUs and net of any shares sold to satisfy applicable tax-withholding obligations, subject to certain conditions, from on or about November 16, 2026 through April 30, 2027.

During the three months ended September 30, 2026, no other director or officer of BETA adopted, modified, orterminated any Rule 10b5-1 trading arrangement or any non-Rule 10b5-1 trading arrangement, as each term is defined in Item 408(a) and (c) of Regulation S-K.