GRIZZLE J DAVID

SEC source: 0001628280-26-044077 · wk-form4_1781742180.xml · nonDerivative · entry 3

GRIZZLE J DAVID · CIK 0001194088 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 218,795

F1 · kind: As part of the Issuer's CEO transition plan, on June 15, 2026, Mr. Grizzle ceased to serve as CEO, while retaining his position as chairman of the Issuer's Board of Directors; in connection therewith, the Issuer's Compensation Committee approved the accelerated vesting of equity awards held by Mr. Grizzle.

F4 · kind: Represents shares of common stock withheld by the Issuer to pay taxes applicable to accelerated vesting of PSUs reported herein.

SEC source: 0001628280-26-044077 · wk-form4_1781742180.xml · nonDerivative · entry 2

GRIZZLE J DAVID · CIK 0001194088 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 276,750

F1 · kind: As part of the Issuer's CEO transition plan, on June 15, 2026, Mr. Grizzle ceased to serve as CEO, while retaining his position as chairman of the Issuer's Board of Directors; in connection therewith, the Issuer's Compensation Committee approved the accelerated vesting of equity awards held by Mr. Grizzle.

F3 · kind: In connection with accelerated vesting of previously granted restricted stock units, subject to performance-based vesting conditions ("PSUs"), the PSUs, which were not previously reported, were deemed earned at an assumed multiple of target and settled into shares of common stock on a one-for-one basis.

SEC source: 0001628280-26-044077 · wk-form4_1781742180.xml · nonDerivative · entry 1

GRIZZLE J DAVID · CIK 0001194088 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 148,245

F1 · kind: As part of the Issuer's CEO transition plan, on June 15, 2026, Mr. Grizzle ceased to serve as CEO, while retaining his position as chairman of the Issuer's Board of Directors; in connection therewith, the Issuer's Compensation Committee approved the accelerated vesting of equity awards held by Mr. Grizzle.

F2 · kind: Represents shares of common stock withheld by the Issuer to pay taxes applicable to accelerated vesting of restricted stock, related to awards previously reported and subject to vesting based on time or achievement of two remaining specified operational milestones.

SEC source: 0001193125-26-254068 · ownership.xml · nonDerivative · entry 1

GRIZZLE J DAVID · CIK 0001194088 · Director · CEO and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 229,221

F1 · kind: Represents shares of common stock withheld by the Issuer to pay taxes applicable to vesting of restricted stock in connection with the certification of achievement of a specified operational milestone related to an award previously reported.

SEC source: 0001193125-25-302785 · ownership.xml · nonDerivative · entry 2

GRIZZLE J DAVID · CIK 0001194088 · Director · CEO and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 234,974

F1 · price: On November 25, 2025, pursuant to that Agreement, Plan of Conversion and Plan of Merger (the "Merger Agreement") dated as of April 4, 2025, by and between Mesa Air Group, Inc. ("Mesa") and Republic Airways Holdings Inc. ("Republic"), among other things, (i) Republic merged with and into Mesa, with Mesa as the surviving corporation in the merger (the "Merger"), (ii) Mesa was converted from a Nevada corporation to a Delaware corporation, and (iii) Mesa was renamed Republic Airways Holdings Inc. (following the Merger, the "Issuer").

F3 · price: Pursuant to the Merger Agreement, immediately prior to the Effective Time, each outstanding Republic restricted stock unit ("Republic RSU") that was not vested in accordance with its terms, was assumed by the Issuer and converted into the right to receive an award of restricted shares of Issuer common stock (rounded up to the next whole share of Issuer common stock) equal to the product obtained by multiplying (x) 38.9933 by (y) the total number of shares of Republic Common Stock subject to such unvested Republic RSU immediately prior to the Effective Time. Each unvested Republic RSU assumed and converted into a share of Issuer restricted stock shall continue to have, and shall be subject to, the same terms and conditions (including with respect to vesting) as applied to the corresponding Republic RSU as of immediately prior to the Effective Time.

F4 · price: These shares of Issuer restricted stock vest as follows, in each case, subject to continued service through the applicable vesting date: with respect to 16,845 shares, in equal installments on each of December 31, 2025, December 31, 2026, and December 31, 2027; and with respect to 191,185 shares, 35% of such shares will vest on each of November 25, 2028 and November 25, 2029, and 30% of such shares will vest in one-third tranches upon the achievement of specified operational milestones.

SEC source: 0001193125-25-302785 · ownership.xml · nonDerivative · entry 1

GRIZZLE J DAVID · CIK 0001194088 · Director · CEO and Chairman

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,944

F1 · price: On November 25, 2025, pursuant to that Agreement, Plan of Conversion and Plan of Merger (the "Merger Agreement") dated as of April 4, 2025, by and between Mesa Air Group, Inc. ("Mesa") and Republic Airways Holdings Inc. ("Republic"), among other things, (i) Republic merged with and into Mesa, with Mesa as the surviving corporation in the merger (the "Merger"), (ii) Mesa was converted from a Nevada corporation to a Delaware corporation, and (iii) Mesa was renamed Republic Airways Holdings Inc. (following the Merger, the "Issuer").

F2 · price: Pursuant to the Merger Agreement, at the effective time of the Merger ("Effective Time"), each share of Republic common stock ("Republic Common Stock"), issued and outstanding immediately prior to the Effective Time of the Merger was automatically converted into the right to receive 38.9933 validly issued, fully paid, and nonassessable shares of Issuer common stock and cash payable in lieu of fractional shares, without interest and subject to any applicable withholding taxes (the "Merger Consideration").