Disc Medicine officer plans $1.9M stock sale

Disc Medicine, Inc. (IRON) has a notice from company officer Kevin J. Bitterman indicating an intention to sell up to 27,136 shares of common stock under Rule 144.

Rhea-AI Filing Summary

Disc Medicine, Inc. (IRON) has a notice from company officer Kevin J. Bitterman indicating an intention to sell up to 27,136 shares of common stock under Rule 144. The shares are to be sold through Morgan Stanley Smith Barney, with an aggregate market value of about $1,902,504.96.

The shares relate to an exercise of options under a registered plan for cash on September 11, 2026. Common shares outstanding are listed as 38,392,844, as context for the potential sale.

Key Figures

Shares to be sold: 27,136 shares Aggregate market value: $1,902,504.96 Shares outstanding: 38,392,844 shares +1 more

4 metrics

Shares to be sold 27,136 shares Maximum common shares covered by Kevin J. Bitterman’s Rule 144 notice

Aggregate market value $1,902,504.96 Aggregate market value of the 27,136 common shares to be sold

Shares outstanding 38,392,844 shares Disc Medicine common shares listed as outstanding in the Rule 144 notice

Planned sale date September 11, 2026 Date listed for the potential Rule 144 sale of common shares

Key Terms

Rule 144, Exercise of Options Under a Registered Plan, aggregate market value

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of 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.

Exercise of Options Under a Registered Plan financial

"Common | 09/11/2026 | Exercise of Options Under a Registered Plan |"

aggregate market value financial

"Common | Morgan Stanley Smith Barney LLC ... | 27136 | 1902504.96 |"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

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

What does the Form 144 filing mean for Disc Medicine (IRON)?

It indicates that officer Kevin J. Bitterman has given notice of an intent to sell up to 27,136 shares of Disc Medicine common stock under Rule 144 through a broker. It is a notice of a possible sale, not confirmation that the sale has occurred.

How many Disc Medicine (IRON) shares are covered by this Rule 144 notice?

The notice covers up to 27,136 shares of Disc Medicine common stock. These shares are associated with an exercise of options under a registered plan for cash on September 11, 2026.

What is the aggregate market value of the Disc Medicine (IRON) shares in this planned sale?

The Form 144 lists an aggregate market value of approximately $1,902,504.96 for the 27,136 shares of Disc Medicine common stock covered by the potential Rule 144 sale.

How many Disc Medicine (IRON) shares are outstanding according to the notice?

The Rule 144 notice lists 38,392,844 Disc Medicine common shares as outstanding. This figure provides context for the potential sale of 27,136 shares under the notice.

On what market and approximate date may the Disc Medicine (IRON) shares be sold?

The notice references potential sales of Disc Medicine common stock on the NASDAQ, with a listed date of sale of September 11, 2026. This reflects the timing and venue anticipated in the Rule 144 notice.

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

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Available on EDGAR 09/11/2026 - 04:12 PM Accepted by SEC EDGAR 09/11/2026 - 04:11 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	0001591747
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	KEVIN J BITTERMAN
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	27136	1902504.96	38392844	09/11/2026	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	09/11/2026	Exercise of Options Under a Registered Plan	Issuer			27136	09/11/2026	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

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	09/11/2026
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/ Kevin Bitterman
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)