| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ATHX | Common Stock | Tax liability | $24,754 | -15,970 | -2% | $1.55 | 768,991 | 17 Jun 2021 | Direct | F1, F2 |
| Id | Content |
|---|---|
| F1 | Shares withheld from the quarterly vesting of annual restricted stock unit awards related to the tax withholding obligation. |
| F2 | Securities beneficially owned are comprised of (1) 470,402 shares of common stock owned and (2) unvested restricted stock units aggregating 298,589 related to annual awards, which vest quarterly over a four-year period from date of grant. |