Form 4 for ACLS AXCELIS TECHNOLOGIES INC
Accepted 2026-05-19 17:05:10 ET · period of report 2026-05-15 · accession 0001990732-26-000006 · 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 | 2026-05-19 17:05 | 2026-05-15 | ACLS | Tatnall Christopher | EVP Gbl Customer Ops | A - Grant | $0.00 | +7,008 | 30.1K | +30% | $0 |
| M | 2026-05-19 17:05 | 2026-05-15 | ACLS | Tatnall Christopher | EVP Gbl Customer Ops | F - Tax | $155.18 | -1,259 | 28.8K | -4% | -$195.4K |
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 | 2026-05-15 | A | A | 3,504 | $0.00 | 26,548 | D | — | — | (F1) These shares are issuable on vesting of restricted stock units granted under the Company's 2012 Equity Incentive Plan on May 15, 2026. Assuming continuation of employment, these restricted stock units will vest as to one-third of the shares granted on each of May 15, 2027, May 15, 2028, and May 15, 2029. (F2) Of the shares held following this grant on May 15, 2026, 19,967 were issuable on vesting of restricted stock units granted to the executive under the 2012 Equity Incentive Plan and are subject to forfeiture. |
| 2 | Common | Common Stock | 2026-05-15 | A | A | 3,504 | $0.00 | 30,052 | D | — | — | (F3) These shares are issuable on vesting of restricted stock units granted under the Company's 2012 Equity Incentive Plan on May 15, 2026. In this grant, the executive may earn shares of common stock, ranging from zero to 200% of the granted units. The shares are earned based on the achievement of performance goals based on relative total shareholder return over a performance period of January 1, 2026 to December 31, 2028. Assuming continuation of employment, 100% of the earned shares will vest on measurement of performance in 2029. Unearned restricted stock units will forfeit at such time. (F4) Of the shares held after this grant on May 15, 2026, 23,471 shares were issuable on vesting of restricted stock units granted to the executive under the 2012 Equity Incentive Plan and are subject to forfeiture. |
| 3 | Common | Common Stock | 2026-05-15 | F | D | 744 | $155.18 | 29,308 | D | — | — | (F6) Represents the closing price of the common stock on the date of the tax withholding. (F5) This forfeiture of shares for tax withholding purposes relates to the vesting on May 15, 2026 of service vesting restricted stock units granted to the executive in May 2025. 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. (F7) Of the shares held after this vesting event on May 15, 2026, 21,934 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture. |
| 4 | Common | Common Stock | 2026-05-15 | F | D | 345 | $155.18 | 28,963 | D | — | — | (F6) Represents the closing price of the common stock on the date of the tax withholding. (F8) This forfeiture of shares for tax withholding purposes relates to the vesting on May 15, 2026 of service vesting restricted stock units granted to the executive in May 2024. 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. (F9) Of the shares held after this vesting event on May 15, 2026, 21,221 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture. |
| 5 | Common | Common Stock | 2026-05-15 | F | D | 170 | $155.18 | 28,793 | D | — | — | (F6) Represents the closing price of the common stock on the date of the tax withholding. (F10) This forfeiture of shares for tax withholding purposes relates to the vesting on May 15, 2026 of service vesting restricted stock units granted to the executive in May 2023. 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. (F11) Of the shares held after this vesting event on May 15, 2026, 20,871 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture. |