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This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, the Reporting Person contributed 79,723 common shares and 158,334 restricted shares to Parent in exchange for an equivalent amount of shares of common stock ("Parent Common Shares") and restricted shares, respectively, of Parent, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, the Reporting Person contributed 100,000 restricted shares to Parent in exchange for an equivalent amount of restricted shares of Parent, which restricted shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, the Reporting Person contributed 78,043 common shares and 116,667 restricted shares to Parent in exchange for an equivalent amount of shares of common stock ("Parent Common Shares") and restricted shares, respectively, of Parent, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, The Robert A. Ortenzio Descendants Trust contributed 1,000,000 common shares ("Rollover Shares") to Parent in exchange for an equivalent amount of Parent Common Shares, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

The reporting person beneficially owns the reported securities indirectly, but disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, the Reporting Person contributed 519,745 common shares and 216,667 restricted shares to Parent in exchange for an equivalent amount of shares of common stock ("Parent Common Shares") and restricted shares, respectively, of Parent, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

Pursuant to the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation, and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026). At the effective time of the merger, each of the Reporting Person's shares of common stock issued and outstanding immediately prior to the effective time of the merger was converted into the right to receive $16.50 per share in cash without interest ("Merger Consideration").

Includes unvested shares of Company common stock subject to forfeiture conditions (the "Company Restricted Shares"). Pursuant the Merger Agreement, each Company Restricted Share held by the Reporting Person that was outstanding immediately prior to the effective time vested in full as of immediately prior to the effective time of the merger and was automatically converted into the right to receive the Merger Consideration, less any applicable tax withholdings.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, The Robert A. Ortenzio 2014 Trust for Bryan A. Ortenzio contributed 280,415 common shares to Parent in exchange for an equivalent amount of Parent Common Shares, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

The reporting person beneficially owns the reported securities indirectly, but disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.

Pursuant to the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation, and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026). At the effective time of the merger, each of the Reporting Person's shares of common stock issued and outstanding immediately prior to the effective time of the merger was converted into the right to receive $16.50 per share in cash without interest ("Merger Consideration").

Includes unvested shares of Company common stock subject to forfeiture conditions (the "Company Restricted Shares"). Pursuant the Merger Agreement, each Company Restricted Share held by the Reporting Person that was outstanding immediately prior to the effective time vested in full as of immediately prior to the effective time of the merger and was automatically converted into the right to receive the Merger Consideration, less any applicable tax withholdings.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, the Reporting Person contributed 2,634 common shares to Parent in exchange for an equivalent amount of shares of Parent Common Shares, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

The reporting person beneficially owns the reported securities indirectly, but disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, the Reporting Person contributed 6,674,010 common shares and 407,778 restricted shares to Parent in exchange for an equivalent amount of shares of common stock ("Parent Common Shares") and restricted shares, respectively, of Parent, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

At the effective time of the merger, each of the Reporting Person's shares of common stock reported in this row of this Form 4 issued and outstanding immediately prior to the effective time of the merger was converted into the right to receive $16.50 per share in cash without interest.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, the Reporting Person contributed 2,634 common shares to Parent in exchange for an equivalent amount of shares of Parent Common Shares, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

The reporting person beneficially owns the reported securities indirectly, but disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, The Robert A. Ortenzio 2014 Trust for Madeline G. Ortenzio contributed 280,415 common shares to Parent in exchange for an equivalent amount of Parent Common Shares, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

The reporting person beneficially owns the reported securities indirectly, but disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, the Reporting Person contributed 31,751 common shares and 103,333 restricted shares to Parent in exchange for an equivalent amount of shares of common stock ("Parent Common Shares") and restricted shares, respectively, of Parent, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

Pursuant to the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation, and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026). At the effective time of the merger, each of the Reporting Person's shares of common stock issued and outstanding immediately prior to the effective time of the merger was converted into the right to receive $16.50 per share in cash without interest ("Merger Consideration").

Includes unvested shares of Company common stock subject to forfeiture conditions (the "Company Restricted Shares"). Pursuant the Merger Agreement, each Company Restricted Share held by the Reporting Person that was outstanding immediately prior to the effective time vested in full as of immediately prior to the effective time of the merger and was automatically converted into the right to receive the Merger Consideration, less any applicable tax withholdings.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, the Reporting Person contributed 16,334 restricted shares ("Rollover Shares") to Parent in exchange for an equivalent amount of shares of common stock ("Parent Common Shares") and restricted shares, respectively, of Parent, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

Surrender of shares to satisfy tax withholding obligation incident to vesting of restricted stock.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, The Robert A. Ortenzio 2014 Trust for Kevin M. Ortenzio contributed 280,415 common shares to Parent in exchange for an equivalent amount of Parent Common Shares, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

The reporting person beneficially owns the reported securities indirectly, but disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.

Pursuant to the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation, and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026). At the effective time of the merger, each of the Reporting Person's shares of common stock issued and outstanding immediately prior to the effective time of the merger was converted into the right to receive $16.50 per share in cash without interest ("Merger Consideration").

Includes unvested shares of Company common stock subject to forfeiture conditions (the "Company Restricted Shares"). Pursuant the Merger Agreement, each Company Restricted Share held by the Reporting Person that was outstanding immediately prior to the effective time vested in full as of immediately prior to the effective time of the merger and was automatically converted into the right to receive the Merger Consideration, less any applicable tax withholdings.

Surrender of shares to satisfy tax withholding obligation incident to vesting of restricted stock.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, the Reporting Person contributed 40,000 restricted shares to Parent in exchange for an equivalent amount of shares restricted shares of Parent, which restricted shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, the Reporting Person contributed 2,634 common shares to Parent in exchange for an equivalent amount of shares of Parent Common Shares, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

The reporting person beneficially owns the reported securities indirectly, but disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

At the effective time of the merger, each of the shares of common stock reported in this row of this Form 4 issued and outstanding immediately prior to the effective time of the merger was converted into the right to receive $16.50 per share in cash without interest.

The reporting person beneficially owns the reported securities indirectly, but disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, the Reporting Person contributed 610,035 common shares (including 14,035 restricted shares which vested immediately prior to the effective time of the merger) to Parent in exchange for an equivalent amount of shares of common stock ("Parent Common Shares") of Parent, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

At the effective time of the merger, each of the Reporting Person's shares of common stock reported in this row of this Form 4 issued and outstanding immediately prior to the effective time of the merger was converted into the right to receive $16.50 per share in cash without interest ("Merger Consideration").

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, the Reporting Person contributed 203,037 common shares and 158,333 restricted shares to Parent in exchange for an equivalent amount of shares of common stock ("Parent Common Shares") and restricted shares, respectively, of Parent, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, the Reporting Person contributed 175,042 common shares and 216,667 restricted shares to Parent in exchange for an equivalent amount of shares of common stock ("Parent Common Shares") and restricted shares, respectively, of Parent, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, the reporting person contributed 1,138,754 common shares and 244,667 restricted shares to Parent in exchange for an equivalent amount of shares of common stock ("Parent Common Shares") and restricted shares, respectively, of Parent, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

Immediately prior to the effective time of the merger, the Reporting Person contributed 2,634 common shares to Parent in exchange for an equivalent amount of shares of Parent Common Shares, which Parent Common Shares were then exchanged for an equivalent amount of interests in Stallion Group Parent, LP.

The reporting person beneficially owns the reported securities indirectly, but disclaims beneficial ownership of the reported securities except to the extent of his pecuniary interest therein.

Pursuant to the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation, and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026). At the effective time of the merger, each of the Reporting Person's shares of common stock issued and outstanding immediately prior to the effective time of the merger was converted into the right to receive $16.50 per share in cash without interest ("Merger Consideration").

Includes unvested shares of Company common stock subject to forfeiture conditions (the "Company Restricted Shares"). Pursuant the Merger Agreement, each Company Restricted Share held by the Reporting Person that was outstanding immediately prior to the effective time vested in full as of immediately prior to the effective time of the merger and was automatically converted into the right to receive the Merger Consideration, less any applicable tax withholdings.

Pursuant to the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation, and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026). At the effective time of the merger, each of the Reporting Person's shares of common stock issued and outstanding immediately prior to the effective time of the merger was converted into the right to receive $16.50 per share in cash without interest ("Merger Consideration").

Includes unvested shares of Company common stock subject to forfeiture conditions (the "Company Restricted Shares"). Pursuant the Merger Agreement, each Company Restricted Share held by the Reporting Person that was outstanding immediately prior to the effective time vested in full as of immediately prior to the effective time of the merger and was automatically converted into the right to receive the Merger Consideration, less any applicable tax withholdings.

Pursuant to the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation, and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026). At the effective time of the merger, each of the Reporting Person's shares of common stock issued and outstanding immediately prior to the effective time of the merger was converted into the right to receive $16.50 per share in cash without interest ("Merger Consideration").

Includes unvested shares of Company common stock subject to forfeiture conditions (the "Company Restricted Shares"). Pursuant the Merger Agreement, each Company Restricted Share held by the Reporting Person that was outstanding immediately prior to the effective time vested in full as of immediately prior to the effective time of the merger and was automatically converted into the right to receive the Merger Consideration, less any applicable tax withholdings.

This Form 4 reports securities disposed of under the Agreement and Plan of Merger (the "Merger Agreement"), entered into on March 2, 2026, by and among the Issuer, Stallion Intermediate Corporation ("Parent"), and Stallion MergerSub Corporation (filed as Exhibit 2.1 to the Form 8-K filed with the Securities and Exchange Commission on March 3, 2026).

At the effective time of the merger, each of the Reporting Person's shares of common stock reported in this row of this Form 4 issued and outstanding immediately prior to the effective time of the merger was converted into the right to receive $16.50 per share in cash without interest ("Merger Consideration").

Includes unvested shares of Company common stock subject to forfeiture conditions (the "Company Restricted Shares"). Pursuant the Merger Agreement, each Company Restricted Share (other than Rollover Shares) held by the Reporting Person that was outstanding immediately prior to the effective time vested in full as of immediately prior to the effective time of the merger and was automatically converted into the right to receive the Merger Consideration, less any applicable tax withholdings.

Surrender of shares to satisfy tax withholding obligation incident to vesting of restricted stock.

Surrender of shares to satisfy tax withholding obligation incident to vesting of restricted stock.

This grant of restricted stock was issued to the reporting person pursuant to the Select Medical Holdings Corporation 2020 Equity Incentive Plan in lieu of a quarterly retainer of $18,000.

This grant of restricted stock was issued to the reporting person pursuant to the Select Medical Holdings Corporation 2020 Equity Incentive Plan in lieu of a quarterly retainer of $18,000.

Surrender of shares to satisfy tax withholding obligation incident to vesting of restricted stock.

Surrender of shares to satisfy tax withholding obligation incident to vesting of restricted stock.

This grant of restricted stock was issued to the reporting person pursuant to the Select Medical Holdings Corporation 2020 Equity Incentive Plan in lieu of a quarterly retainer of $18,000.

Grant of restricted stock, which subject to certain exceptions, will vest in full on October 28, 2029, the fourth anniversary of the grant date.

Grant of restricted stock, which subject to certain exceptions, will vest in full on October 28, 2029, the fourth anniversary of the grant date.

Surrender of shares to satisfy tax withholding obligation incident to vesting of restricted stock.

Surrender of shares to satisfy tax withholding obligation incident to vesting of restricted stock.

Surrender of shares to satisfy tax withholding obligation incident to vesting of restricted stock.

Surrender of shares to satisfy tax withholding obligation incident to vesting of restricted stock.

Surrender of shares to satisfy tax withholding obligation incident to vesting of restricted stock.

Surrender of shares to satisfy tax withholding obligation incident to vesting of restricted stock.

Grant of restricted stock which will vest in equal annual installments over three years.

Grant of restricted stock which, subject to certain exceptions, will vest in full on July 29, 2028, the third anniversary of the grant date.