ACLS affiliate files Form 144 to sell 1,166 shares

ACLS affiliate files a Form 144 to sell common stock.

Rhea-AI Filing Summary

ACLS affiliate files a Form 144 to sell common stock. The filing lists 1,166 shares of Common stock associated with restricted stock vesting under a registered plan on 05/15/2026. The Form 144 notice was recorded on 05/20/2026, and the sale is described as tied to restricted stock vesting under a registered plan.

Insights

Corporate Governance Analyst

Routine affiliate resale tied to vesting; administrative notice of proposed sale.

The filing documents a proposed resale of 1,166 shares related to restricted stock vesting under a registered plan on 05/15/2026. This appears procedural: Form 144 notifies the market of an intended sale by an affiliate rather than reporting an open-market transaction.

Cash‑flow treatment and selling method are not stated in the excerpt; subsequent broker filings or Form 4/5 may show execution details.

Key Figures

Form filed: Form 144 Shares indicated: 1,166 shares Vesting date: 05/15/2026 +1 more

4 metrics

Form filed Form 144 Notice of proposed sale

Shares indicated 1,166 shares Common stock tied to vesting under a registered plan on <date>05/15/2026</date>

Vesting date 05/15/2026 Restricted stock vesting under a registered plan

Form recorded 05/20/2026 Form 144 filing date

Key Terms

Form 144, restricted stock, registered plan

3 terms

Form 144 regulatory

"Filer Information | 144: Filer Information"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

restricted stock financial

"Restricted stock vesting under a registered plan"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

registered plan regulatory

"Restricted stock vesting under a registered plan"

A registered plan is a savings or investment account that a government recognizes for special tax treatment and rules, such as limits on how much you can put in and conditions for withdrawals. For investors it matters because those rules change how much of your gains are taxed, how quickly your money can be accessed and what strategies make sense — like a labeled jar that gives tax breaks but comes with rules about when and how you can take the money out.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does ACLS's Form 144 disclose?

The Form 144 discloses a proposed sale of 1,166 shares of Common stock tied to restricted stock vesting on 05/15/2026. It is a notice of intent to sell by an affiliate, recorded on 05/20/2026.

Does the filing state who will receive proceeds from the sale for ACLS?

The excerpt does not state proceeds recipients. It lists the transaction as connected to restricted stock vesting under a registered plan; specific cash‑flow treatment is not provided in the provided content.

Is the ACLS sale already completed per the Form 144?

No. Form 144 is a notice of a proposed resale by an affiliate. The excerpt records the vesting date 05/15/2026 and the filing date 05/20/2026, but does not confirm completion of any sale.

What type of securities are covered in the ACLS Form 144?

The filing covers Common stock issued under a registered plan and describes the shares as resulting from restricted stock vesting. The quantity shown is 1,166 shares.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/20/2026 - 04:13 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001990732
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	AXCELIS TECHNOLOGIES, INC.
SEC File Number	000-30941
Address of Issuer	108 Cherry Hill Drive Beverly MASSACHUSETTS 01915
Phone	978-787-4000
Name of Person for Whose Account the Securities are To Be Sold	CHRISTOPHER TATNALL
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	1166	174608.50	30734000	05/20/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	05/15/2026	Restricted stock vesting under a registered plan	Issuer			1166	05/15/2026	Not Applicable

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	05/20/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/S/ Christopher Tatnall
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)