Director sale: 590 ADS filed for ONC (NASDAQ: ONC) — recent Chan Lee trades

Rhea-AI Filing Summary

ONC proposes the sale of 590 ADSs under a registered plan vesting on 06/15/2026. The Form 144 lists the security as ADS and notes the disposition method as "Restricted Stock Vesting Under a Registered Plan." The filing also shows recent ADS dispositions by Chan Lee on 06/11/2026 (428 ADS, $110,267.78) and 06/08/2026 (871 ADS, $235,539.13), plus two trades of 332 ADS each on 05/13/2026 and 04/08/2026 with proceeds of $103,159.04 and $103,447.88.

Insights

Securities Compliance Analyst

Routine Form 144 notice for ADSs tied to restricted stock vesting; recent insider dispositions are disclosed.

The filing registers 590 ADS as the proposed sale amount under a registered plan vesting on 06/15/2026. It identifies the security as ADS and cites "Restricted Stock Vesting Under a Registered Plan" as the disposition reason.

Recent transactions by Chan Lee are listed as separate dispositions on 04/08/2026, 05/13/2026, 06/08/2026, and 06/11/2026. Cash‑flow treatment and any lockups or transfer restrictions beyond the stated vesting are not detailed in the excerpt.

Key Figures

Registered ADS to be sold: 590 ADS Disposition by Chan Lee: 428 ADS Disposition by Chan Lee: 871 ADS +2 more

5 metrics

Registered ADS to be sold 590 ADS registered sale under plan vesting on 06/15/2026

Disposition by Chan Lee 428 ADS trade on 06/11/2026 with proceeds <money>$110,267.78</money>

Disposition by Chan Lee 871 ADS trade on 06/08/2026 with proceeds <money>$235,539.13</money>

Disposition by Chan Lee 332 ADS trade on 05/13/2026 with proceeds <money>$103,159.04</money>

Disposition by Chan Lee 332 ADS trade on 04/08/2026 with proceeds <money>$103,447.88</money>

Key Terms

Form 144, ADS, Restricted Stock Vesting

3 terms

Form 144 regulatory

"144: Securities To Be Sold"

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

"144: Securities Information ADS | Morgan Stanley Smith Barney LLC"

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 financial

"Restricted Stock Vesting 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.

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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	590	156925.25	54885669	06/16/2026	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	06/15/2026	Restricted Stock Vesting Under a Registered Plan	Issuer			590	06/15/2026	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

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	06/11/2026	428	110267.78
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

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 ONC's Form 144 disclose about the sale?

The filing proposes the sale of 590 ADSs under a registered plan vesting on 06/15/2026. It lists the disposition method as "Restricted Stock Vesting Under a Registered Plan" and identifies recent ADS transactions by Chan Lee.

Who executed recent ADS dispositions shown in the filing for ONC?

The filing shows recent ADS dispositions executed by Chan Lee on 04/08/2026, 05/13/2026, 06/08/2026, and 06/11/2026, with per‑trade proceeds reported in the filing.

How many ADS were sold on 06/08/2026 in the excerpt?

The excerpt reports a sale of 871 ADS on 06/08/2026 with proceeds of $235,539.13, as listed in the selling activity section of the filing.

Does the Form 144 state who receives the proceeds from the 590 ADS sale?

The excerpt labels the disposition as tied to an issuer plan vesting event but does not state who receives the proceeds for the proposed sale; cash‑flow treatment is not specified in the provided excerpt.

Are the listed ADS trades part of the registered offering or separate dispositions?

The filing lists the proposed registration of 590 ADS and separately shows prior ADS dispositions by Chan Lee; the excerpt does not aggregate these numbers or state they are all part of the same registered offering.