Broker files Form 144 notice for 10,000 shares

Morgan Stanley Smith Barney LLC Executive Financial Services submitted a Form 144 notice reporting the proposed sale of 10,000 common shares on 07/07/2026 tied to an exercise of stock options for cash.

Rhea-AI Filing Summary

Morgan Stanley Smith Barney LLC Executive Financial Services submitted a Form 144 notice reporting the proposed sale of 10,000 common shares on 07/07/2026 tied to an exercise of stock options for cash. The filing lists recent 10b5-1 sales by Jonathan Yu: 300 shares on 06/26/2026 for $21,750, 9,700 shares on 06/22/2026 for $704,795.21, and 18,612 shares on 06/16/2026 for $1,287,800.28.

Insights

Securities Attorney

Routine Rule 144 notice for an option exercise and resale.

The filing records a 10,000-share planned sale on 07/07/2026 described as an exercise of stock options paid in cash. Rule-based resale notices like this function as compliance disclosures rather than corporate actions.

Timing and cash‑flow treatment are stated as cash; further details about who receives proceeds are not given in the excerpt. Subsequent SEC filings or broker confirmations would show execution results.

Equity Markets Analyst

Shows recent insider liquidity via 10b5-1 program followed by a planned option-related sale.

The excerpt lists three 10b5-1 disposals by Jonathan Yu totalling 28,612 shares across June 2026 with stated proceeds in the filing. The planned 10,000-share sale on 07/07/2026 is recorded as option exercise followed by cash sale.

These entries document sale activity; impact on outstanding float or ownership is not provided in the excerpt and therefore cannot be assessed here.

Key Figures

Planned sale: 10,000 shares June 16 sale: 18,612 shares June 22 sale: 9,700 shares +1 more

4 metrics

Planned sale 10,000 shares Exercise of stock options on <date>07/07/2026</date>

June 16 sale 18,612 shares 10b5-1 sale on <date>06/16/2026</date> for <money>$1,287,800.28</money>

June 22 sale 9,700 shares 10b5-1 sale on <date>06/22/2026</date> for <money>$704,795.21</money>

June 26 sale 300 shares 10b5-1 sale on <date>06/26/2026</date> for <money>$21,750</money>

Key Terms

Form 144, 10b5-1, Exercise of Stock Options

3 terms

Form 144 regulatory

"144: Securities To Be Sold — notice of proposed sale under Rule 144"

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.

10b5-1 regulatory

"10b5-1 Sales for JONATHAN YU — listed for June 2026 transactions"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Exercise of Stock Options financial

"Securities To Be Sold — Exercise of Stock Options on 07/07/2026"

FAQ

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

What does the Form 144 filed for IRON report?

The Form 144 reports a proposed sale of 10,000 common shares on 07/07/2026 tied to an exercise of stock options to be settled for cash. The notice lists recent 10b5-1 sales by Jonathan Yu in June 2026.

Who executed prior sales listed in the filing?

The filing lists prior 10b5-1 sales by Jonathan Yu on 06/16/2026, 06/22/2026, and 06/26/2026, with stated share counts and proceeds for each transaction.

How many shares and proceeds were reported for the June 16, 2026 sale?

The filing shows 18,612 shares sold on 06/16/2026 for $1,287,800.28, as recorded in the Form 144 excerpt under securities sold during the past three months.

Does the Form 144 indicate who receives the sale proceeds?

The excerpt states the method as Cash for the 07/07/2026 item, but it does not specify the recipient of proceeds in the provided text. Further transaction documents would be required for that detail.

Are the June 2026 transactions described as planned or discretionary?

The June transactions are described in the excerpt as 10b5-1 Sales, indicating they were effected under a trading plan. The filing lists dates, share counts, and proceeds for each sale.

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

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Accepted by SEC EDGAR 07/07/2026 - 04:32 PM 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	0001951849
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	Disc Medicine, Inc.
SEC File Number	001-39438
Address of Issuer	321 Arsenal Street,Suite101 Watertown MASSACHUSETTS 02472
Phone	6176749274
Name of Person for Whose Account the Securities are To Be Sold	JONATHAN YU
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	10000	770100.00	38199089	07/07/2026	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	07/07/2026	Exercise of Stock Options	Issuer			10000	07/07/2026	Cash

* 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
10b5-1 Sales for JONATHAN YU 321 Arsenal Street,Suite101 Watertown MA 02472	Common	06/26/2026	300	21750.00
10b5-1 Sales for JONATHAN YU 321 Arsenal Street,Suite101 Watertown MA 02472	Common	06/22/2026	9700	704795.21
10b5-1 Sales for JONATHAN YU 321 Arsenal Street,Suite101 Watertown MA 02472	Common	06/16/2026	18612	1287800.28

144: Remarks and Signature

Remarks	The securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale.
Date of Notice	07/07/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	03/17/2026
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/ Jonathan Yu
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)