ACLS: Tatnall Christopher discloses securities transactions

By AlphaYouPublished Sep 23, 2026Form 4

Stocks in this disclosure

Reported activity

Tatnall Christopher

Reporting filer

Tatnall Christopher reported Tax/exercise withholding in AXCELIS TECHNOLOGIES INC: 136 units of Common Stock, dated 2026-09-15. The full Form 4 contains 1 transaction entry.

Disclosed: Sep 16, 2026

Reported details

1 entry

All validated entries in this disclosure
Security	Owner	Date	Code	Action	Quantity	Price	Following holdings	Reporting delay	Filed terms and references
Common Stock	Tatnall Christopher	2026-09-15	F	Tax/exercise withholding	136	105.04	27,491	1 day	Filed terms security Title: Common Stock transaction Date: 2026-09-15 transaction Form Type: 4 transaction Code: F equity Swap Involved: 0 transaction Shares: 136 transaction Price Per Share: 105.04 id: F2 transaction Acquired Disposed Code: D id: F1 shares Owned Following Transaction: 27491 id: F3 direct Or Indirect Ownership: D nature Of Ownership:

Common Stock

Owner: Tatnall Christopher
Date: 2026-09-15
Code: F
Action: Tax/exercise withholding
Quantity: 136
Price: 105.04
Following holdings: 27,491
Reporting delay: 1 day
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: F
equity Swap Involved: 0
transaction Shares: 136
transaction Price Per Share: 105.04
id: F2
transaction Acquired Disposed Code: D
id: F1
shares Owned Following Transaction: 27491
id: F3
direct Or Indirect Ownership: D
nature Of Ownership:

Purchases, sales, grants and option exercises are different transactions. The reported code identifies the action; it does not establish a motive.

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.
Tatnall Christopher: EVP Global Customer Operations.
F1: This forfeiture of shares for tax withholding purposes relates to the vesting on September 15, 2026 of service vesting restricted stock units granted to the executive in September 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.
F2: Represents the closing price of the common stock on the date of the tax withholding.
F3: Of the shares held after this vesting event on September 15, 2026, 20,590 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture.

Original sources

SEC ownership filing

Prepared automatically from public filing data. Report a correction.

Security

Owner

Date

Code

Action

Quantity

Price

Following holdings

Reporting delay

Filed terms and references

Common Stock

Tatnall Christopher

2026-09-15

Tax/exercise withholding

136

105.04

27,491

1 day

Filed terms

security Title: Common Stock
transaction Date: 2026-09-15
transaction Form Type: 4
transaction Code: F
equity Swap Involved: 0
transaction Shares: 136
transaction Price Per Share: 105.04
id: F2
transaction Acquired Disposed Code: D
id: F1
shares Owned Following Transaction: 27491
id: F3
direct Or Indirect Ownership: D
nature Of Ownership:

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.

Tatnall Christopher: EVP Global Customer Operations.

F1: This forfeiture of shares for tax withholding purposes relates to the vesting on September 15, 2026 of service vesting restricted stock units granted to the executive in September 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.

F2: Represents the closing price of the common stock on the date of the tax withholding.

F3: Of the shares held after this vesting event on September 15, 2026, 20,590 were issuable on vesting of restricted stock units granted to the reporting person under the 2012 Equity Incentive Plan and are subject to forfeiture.