Company: MBIO
Filing Date: 2025-12-03
Form Type: DEF 14A
Source: 0001104659-25-118122
Chunk: 56

Company: MUSTANG BIO, INC.
Filing Date: 2025-12-03
Form: DEF 14A
Chunk 56
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 date (less any amount paid for the stock), and we will typically be allowed a corresponding federal income tax deduction, subject to limitations in certain circumstances at that time. Any future appreciation in the stock will be taxable to the participant at capital gains rates. However, if the stock is later forfeited, the participant will not be able to recover the tax previously paid pursuant to the Section 83(b) election. To the extent unrestricted dividends are paid during the restricted period under the applicable award agreement, any such dividends will be taxable to the participant at ordinary income tax rates and will be deductible by us unless the participant has made a Section 83(b) election, in which case the dividends will thereafter be taxable to the participant as dividends and will not be deductible by us.

Stock Units.A participant typically will not recognize income, and we will not be allowed a tax deduction, at the time a stock unit award is granted. Upon receipt of shares of our common stock (or the equivalent value in cash) in settlement of a stock unit award, a participant will recognize ordinary income equal to the fair market value of our common stock or other property as of that date, and we will typically be allowed a corresponding federal income tax deduction at that time, subject to limitations in certain circumstances.

Cash-Based Performance Awards.A participant will not recognize income, and we will not be allowed a tax deduction, at the time a cash-based performance award is granted (for example, when the performance goals are established). Upon receipt of cash in settlement of the award, the participant will recognize ordinary income equal to the cash received, and we will typically be allowed a corresponding federal income tax deduction at that time, subject to limitations in certain circumstances.**

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Existing Plan Benefits Awards under the EIP are at the discretion of the Compensation Committee. Accordingly, future awards under the EIP are not determinable. The table below shows the number of shares issued or subject to awards granted under the EIP through September 30, 2025, to our named executive officers and the other individuals and groups indicated.

| ​                                                                      | ​ |                  ​ | ​ |                   ​ |
| ​                                                                      |   |          Aggregate |   |           Aggregate |
| ​                                                                      | ​ |   Number of Shares | ​ |           Number of |
| ​                                                                      | ​ | Subject to Options | ​ |   Shares Subject to |
| ​                                                                      | ​ |            Granted | ​ | Restricted Stock or |
| ​                                                                      | ​ |      under the EIP | ​