ACLS Form 144: Proposed Sale of 900 Shares

ACLS filed a Form 144 reporting a proposed sale of 900 shares of Common Stock associated with restricted stock vesting under a registered plan.

Rhea-AI Filing Summary

ACLS filed a Form 144 reporting a proposed sale of 900 shares of Common Stock associated with restricted stock vesting under a registered plan. The transaction date shown is 05/15/2026 and the Form 144 entry is dated 05/22/2026. The filing lists the seller as the Issuer and identifies the market as NASDAQ.

Insights

Securities Compliance Analyst

Routine Rule 144 notice for vested restricted shares; administrative disclosure only.

The filing records a proposed disposition of 900 shares tied to restricted stock vesting under a registered plan with a transaction date of 05/15/2026. It identifies the seller role as Issuer and lists NASDAQ as the market.

Because this is a Form 144 notice, it serves as a regulatory disclosure of an intended sale rather than proof of a completed open-market trade; subsequent filings or trade reports would show execution. Review any later trade reports or Form 4/5 filings for final disposition details.

Key Figures

Shares reported: 900 shares Vesting / transaction date: 05/15/2026 Form 144 entry date: 05/22/2026

3 metrics

Shares reported 900 shares proposed sale tied to restricted stock vesting

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

Form 144 entry date 05/22/2026 date shown on the Form 144 record

Key Terms

restricted stock, registered plan, Form 144

3 terms

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.

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.

FAQ

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

What does ACLS's Form 144 report?

It reports a proposed sale of 900 shares tied to restricted stock vesting. The filing shows the transaction date 05/15/2026 and the Form 144 entry dated 05/22/2026, with the seller listed as the Issuer.

Does this Form 144 confirm shares were sold for ACLS?

No, it notifies a proposed sale under Rule 144 rather than confirming execution. The Form 144 lists the intended sale of 900 shares; completion would appear in subsequent trade or reporting filings.

What is the nature of the shares ACLS plans to sell?

The shares are from restricted stock vesting under a registered plan. The filing explicitly describes the securities as restricted stock vesting on 05/15/2026, eligible for sale under the reported notice.

Which market is listed for the proposed ACLS sale?

The filing identifies NASDAQ as the market for the securities. The Form 144 entry includes market information alongside the reported proposed sale of 900 shares.

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

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Accepted by SEC EDGAR 05/22/2026 - 04:21 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	0001339595
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	THOMAS M. ST. DENNIS
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	Director

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	900	139833.00	30733897	05/22/2026	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			900	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	05/22/2026
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/ Thomas Martin St. Dennis
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)