Company: MBIO
Filing Date: 2025-01-15
Form Type: S-1
Source: 0001410578-25-000028
Chunk: 261

Company: MUSTANG BIO, INC.
Filing Date: 2025-01-15
Form: S-1
Chunk 261
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 to restricted stock of $ million, which is expected to be recognized over a weighted average period of approximately years.

F-26

Restricted Stock Units

The following table summarizes restricted stock units’ activities for the year ended December 31, 2023 and 2022:

| ​                              
 ​                              
 ​                              
 ​                              | ​ 
 ​ 
 ​ |               ​ 
               ​ 
               ​ 
 Number of Units | ​ 
 ​ 
 ​ | ​                
 Weighted Average 
 Grant Date Fair  
 Value            |     ​ |
|:-------------------------------|:--|----------------:|:--|:-----------------|------:|
| Nonvested at December 31, 2021 |   |         155,704 | ​ | $                | 49.05 |
| Granted                        |   |          98,976 | ​ |                  | 11.40 |
| Forfeited                      | ​ |         -34,333 | ​ | ​                | 37.95 |
| Vested                         | ​ |         -54,435 | ​ | ​                | 44.70 |
| Nonvested at December 31, 2022 |   |         165,912 | ​ | $                | 27.60 |
| Granted                        |   |          29,732 | ​ |                  |  5.13 |
| Forfeited                      | ​ |         -51,366 | ​ | ​                | 27.22 |
| Vested                         |   |         -49,081 | ​ |                  | 31.53 |
| Nonvested at December 31, 2023 |   |          95,197 | ​ | $                | 18.78 |

As of December 31, 2023, the Company had unrecognized stock-based compensation expense related to restricted stock units of approximately $ million, which is expected to be recognized over a weighted average period of approximately years.

The following table summarizes stock-based compensation expense for the years ended December 31, 2023 and 2022 (in thousands).

| ​                                      
 ​                                      | ​ 
 ​ 
 ​ | ​                               
 For the year ended December 31, |    ​ 
 2023 | ​ | ​ |     ​ 
  2022 |
|:---------------------------------------|:--|:--------------------------------|-----:|:--|:--|------:|
| General and administrative             | ​ | $                               |  436 | ​ | $ |