IRON Form 144: RSU Vesting 13,264 Shares

IRON Form 144 filing reports proposed sales of Common shares tied to an RSU vesting and prior 10b5-1 activity.

Rhea-AI Filing Summary

IRON Form 144 filing reports proposed sales of Common shares tied to an RSU vesting and prior 10b5-1 activity. The filing shows 13,264 Common shares associated with RSU Vesting dated 02/15/2026 and a prior 10b5-1 sale by John Quisel of 40,000 Common shares on 12/11/2025, with a listed value of $742,120.80.

FAQ

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

What does the IRON Form 144 disclose about scheduled RSU vesting?

The filing lists 13,264 Common shares tied to an RSU vesting event dated 02/15/2026. These shares are identified in the securities-to-be-sold section and linked to the issuer.

Who is the reporting person in the IRON Form 144 and what prior sales are shown?

The filing shows prior 10b5-1 sales by John Quisel, including a sale of 40,000 Common shares on 12/11/2025. The 10b5-1 sales entry includes an associated value of $3,721,932.17 in the row.

Which broker/dealer is named on the IRON Form 144?

The Form 144 names Morgan Stanley Smith Barney LLC with an address at 1 New York Plaza, 8th Floor, New York, NY 10004 as the broker/dealer handling the transactions.

What dates are important in the IRON Form 144 filing?

Key dates shown are the RSU vesting date 02/15/2026 and the prior 10b5-1 sale date 12/11/2025. The filing header also lists a Form date of 02/17/2026.

What monetary amounts appear in the IRON Form 144 excerpt?

The excerpt includes $742,120.80 adjacent to the 13,264 share line and $3,721,932.17 associated with the 40,000 share 10b5-1 sale entry.

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

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Accepted by SEC EDGAR 02/17/2026 - 08:38 PM EST 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	0001586788
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 Suite 101 Watertown MASSACHUSETTS 02472
Phone	617-674-9274
Name of Person for Whose Account the Securities are To Be Sold	Quisel John D
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
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	13264	742120.80	37750162	02/17/2026	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	02/15/2026	RSU Vesting	Issuer			13264	02/15/2026	N/A

* 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 JOHN QUISEL 321 Arsenal Street Suite 101 Watertown MA 02472	Common	12/11/2025	40000	3721932.17

144: Remarks and Signature

Remarks	Represents sale of shares to cover tax withholding obligations in connection with the vesting of certain restricted stock units previously granted to the Reporting Person. This sale is a "sell to cover" transaction and does not represent a discretionary transaction by the Reporting Person.
Date of Notice	02/17/2026
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/ John Quisel, J.D., Ph.D.
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)