Chan Lee files Form 144 to sell ADS at ONC (NASDAQ: ONC)

Rhea-AI Filing Summary

ONC: proposed disposition of American Depositary Shares reported on Form 144. The filing names Chan Lee and shows a proposed sale of 428 ADS on 06/10/2026 related to Restricted Stock Vesting Under a Registered Plan. The notice also lists recent sales: 871 ADS on 06/08/2026 for $235,539.13, 332 ADS on 05/13/2026 for $103,159.04, 332 ADS on 04/08/2026 for $103,447.88, and 341 ADS on 03/11/2026 for $102,300.00.

Key Figures

Proposed sale: 428 ADS Recent sale: 871 ADS Recent sale: 332 ADS +3 more

6 metrics

Proposed sale 428 ADS 06/10/2026; Restricted Stock Vesting Under a Registered Plan

Recent sale 871 ADS 06/08/2026; proceeds $235,539.13

Recent sale 332 ADS 05/13/2026; proceeds $103,159.04

Recent sale 332 ADS 04/08/2026; proceeds $103,447.88

Recent sale 341 ADS 03/11/2026; proceeds $102,300.00

Market listing NASDAQ ADS class listing as shown in the filing

Key Terms

Form 144, ADS, Restricted Stock Vesting Under a Registered Plan, Issuer

4 terms

Form 144 regulatory

"Filing header and transaction rows showing proposed disposition"

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.

ADS financial

"Multiple rows labeled ADS with dates and share counts"

Ads are paid promotional messages a company places across media — online, on TV, in print, or on social platforms — to attract customers, explain products, or shape public perception. For investors, ads matter because they drive sales growth, affect how much a company must spend to win customers, and influence brand strength and long-term value. Ads can also create regulatory or reputational risk if claims are misleading, which can affect profits and stock price.

Restricted Stock Vesting Under a Registered Plan compensation

"06/10/2026 line item describing the 428 ADS"

Issuer regulatory

"Securities To Be Sold table includes the word Issuer"

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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
ADS	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	428	110267.78	54885669	06/11/2026	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 *
ADS	06/10/2026	Restricted Stock Vesting Under a Registered Plan	Issuer			428	06/10/2026	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

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
CHAN LEE 94 Solaris Avenue, Camana Bay Grand Cayman E9 KY1 1108	ADS	06/08/2026	871	235539.13
Chan Lee 94 Solaris Avenue, Camana Bay Grand Cayman E9 KY1 1108	ADS	05/13/2026	332	103159.04
Chan Lee 94 Solaris Avenue, Camana Bay Grand Cayman E9 KY1 1108	ADS	04/08/2026	332	103447.88
Chan Lee 94 Solaris Avenue, Camana Bay Grand Cayman E9 KY1 1108	ADS	03/11/2026	341	102300.00

144: Remarks and Signature

Remarks

Date of Notice

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the ONC Form 144 filing show about Chan Lee's transactions?

The filing lists a proposed sale of 428 ADS on 06/10/2026 tied to restricted stock vesting and four recent dispositions totaling multiple ADS and dollar amounts across March–June 2026.

How many ADS did Chan Lee recently sell according to the Form 144?

Recent sales shown include 871 ADS on 06/08/2026, 332 ADS on 05/13/2026, 332 ADS on 04/08/2026, and 341 ADS on 03/11/2026, each with stated dollar proceeds.

What proceeds are reported for the listed ADS sales in the ONC filing?

The filing reports proceeds of $235,539.13 for 871 ADS (06/08/2026), $103,159.04 for 332 ADS (05/13/2026), $103,447.88 for 332 ADS (04/08/2026), and $102,300.00 for 341 ADS (03/11/2026).

Is the 06/10/2026 ADS sale part of a compensation plan for ONC (ticker ONC)?

Yes. The entry for 06/10/2026 is labeled Restricted Stock Vesting Under a Registered Plan, indicating the 428 ADS are tied to vesting under a registered plan.

Which market lists the ADS referenced in the filing?

The filing identifies the market as NASDAQ for the referenced ADS class and shows the securities as ADS in the submitted notice.