Form 4 for ACLS AXCELIS TECHNOLOGIES INC
Accepted 2026-05-20 17:05:11 ET · period of report 2026-05-18 · accession 0002101601-26-000010 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M | 2026-05-20 17:05 | 2026-05-18 | ACLS | Mahoney Robert John | EVP Gbl Ops | F - Tax | $146.24 | -312 | 15.6K | -2% | -$45.6K |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-05-18 | F | D | 182 | $146.24 | 15,695 | D | — | — | (F2) Represents the closing price of the common stock on the date of the tax withholding. (F1) This forfeiture of shares for tax withholding purposes relates to the vesting on May 16, 2026 of service vesting restricted stock units granted to the executive in May 2022. The shares issued to the executive on the vesting were reduced by a number of shares having a value equal to the executive's tax withholding obligation with respect to the vested restricted stock units. (F3) Of the shares held after this vesting event on May 16, 2026, 12,846 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture. |
| 2 | Common | Common Stock | 2026-05-18 | F | D | 130 | $146.24 | 15,565 | D | — | — | (F2) Represents the closing price of the common stock on the date of the tax withholding. (F1) This forfeiture of shares for tax withholding purposes relates to the vesting on May 16, 2026 of service vesting restricted stock units granted to the executive in May 2022. The shares issued to the executive on the vesting were reduced by a number of shares having a value equal to the executive's tax withholding obligation with respect to the vested restricted stock units. (F4) Of the shares held after this vesting event on May 16, 2026, 12,578 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture. |