ICON plc holder plans Rule 144 stock sale

A holder of ICON plc (ICLR) common stock filed a notice to sell 915 shares on the NASDAQ under Rule 144.

Rhea-AI Filing Summary

A holder of ICON plc (ICLR) common stock filed a notice to sell 915 shares on the NASDAQ under Rule 144. The shares arise from restricted stock vesting on 08/10/2026 under a registered plan, with brokerage handled by Morgan Stanley Smith Barney LLC Executive Financial Services.

Key Figures

Shares to be sold: 915 shares Aggregate market value: $150,327.45 Trade venue: NASDAQ +1 more

4 metrics

Shares to be sold 915 shares Common stock planned for sale under Rule 144

Aggregate market value $150,327.45 Reported value for the 915 shares covered by the notice

Trade venue NASDAQ Planned market for the sale of the common stock

Vesting date 08/10/2026 Date of restricted stock vesting under a registered plan

Key Terms

Rule 144, Restricted Stock Vesting, Registered Plan, Executive Financial Services

4 terms

Rule 144 regulatory

"A holder of ICON plc common stock filed a notice to sell under Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting financial

"shares arise from restricted stock vesting on 08/10/2026 under a registered plan"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

Registered Plan financial

"restricted stock vesting on 08/10/2026 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.

Executive Financial Services financial

"handled by Morgan Stanley Smith Barney LLC Executive Financial Services"

FAQ

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

What does the ICLR Form 144 filing disclose?

The filing discloses that a holder of ICON plc (ICLR) common stock intends to sell 915 restricted shares on the NASDAQ under Rule 144, following restricted stock vesting on 08/10/2026 under a registered plan.

How many ICLR shares are covered by this Form 144?

The Form 144 covers 915 shares of ICON plc common stock. These shares are associated with restricted stock vesting on 08/10/2026 under a registered compensation plan and may be sold on the NASDAQ market.

What is the reported market value of the ICLR shares in this Form 144?

The filing reports an aggregate market value of $150,327.45 for the 915 shares of ICON plc common stock. This value is used for the Rule 144 notice and reflects the securities planned for potential sale.

What is the origin of the ICLR shares being sold under this Form 144?

The 915 ICON plc shares come from restricted stock vesting on 08/10/2026 under a registered plan. The filing identifies the nature of acquisition as compensation for services rendered by the holder.

Which broker is handling the potential sale of ICLR shares in this Form 144?

The potential sale is to be handled through Morgan Stanley Smith Barney LLC Executive Financial Services, based at 1 New York Plaza, 8th Floor, New York, NY 10004, as disclosed in the Form 144 details.

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

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Accepted by SEC EDGAR 08/11/2026 - 05:02 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	0001630299
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	ICON PUBLIC LIMITED COMPANY
SEC File Number	333-08704
Address of Issuer	South County Business Park Leopardstown Dublin 18 IRELAND D18 X5R3
Phone	353-1-291-2000
Name of Person for Whose Account the Securities are To Be Sold	JULIE ANN O'NEILL
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	915	150327.45	77154209	08/11/2026	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	08/10/2026	Restricted Stock Vesting Under a Registered Plan	Issuer			915	08/10/2026	Services Rendered

* 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	Represents the number of shares required to be sold to cover tax withholding obligations in connection with the vesting of compensatory equity awards. These sales are "sell to cover" transactions mandated by the applicable award agreement to satisfy the applicable tax withholding obligation and do not represent discretionary trades by the Reporting Person.
Date of Notice	08/11/2026
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/ JULIE ANN O'NEILL
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)