Disc Medicine holder may sell 18 shares

Disc Medicine, Inc. (IRON) received a Rule 144 notice covering a small planned resale of its common stock by Atlas Venture Fund XII.

Rhea-AI Filing Summary

Disc Medicine, Inc. (IRON) received a Rule 144 notice covering a small planned resale of its common stock by Atlas Venture Fund XII. The filing reports that 18 shares of common stock may be sold through Merrill Lynch, with an aggregate market value of $1,428.66, on or about September 4, 2026, on Nasdaq.

The shares were originally acquired in a Private Placement from the issuer for cash on May 1, 2020. The notice also refers to an attached schedule describing additional sales over the prior three months.

Key Figures

Shares to be sold under Rule 144: 18 shares Aggregate market value of shares to be sold: $1,428.66 Shares outstanding: 38,392,844 shares +3 more

6 metrics

Shares to be sold under Rule 144 18 shares Planned resale of Disc Medicine, Inc. common stock by Atlas Venture Fund XII

Aggregate market value of shares to be sold $1,428.66 Value reported for the 18 shares covered by the notice

Shares outstanding 38,392,844 shares Number of Disc Medicine, Inc. common shares outstanding listed in the notice

Original acquisition date May 1, 2020 Date the shares were acquired in a Private Placement for cash

Approximate sale date September 4, 2026 Approximate date of sale noted for the Rule 144 transaction

Date of Rule 144 notice September 4, 2026 Date the Form 144 notice was signed and submitted

Key Terms

Rule 144, Private Placement, Nasdaq

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.

Private Placement financial

"Common Stock | 05/01/2020 | Private Placement | Issuer"

A private placement is a sale of securities directly to a selected group of investors, typically institutions or accredited investors, instead of through a public offering. It lets a company raise money faster and with fewer regulatory steps; for existing shareholders it matters because the newly issued shares, often sold at a discount, increase the share count and can dilute their ownership.

Nasdaq market

"38392844 | 09/04/2026 | Nasdaq"

The Nasdaq is a stock exchange where many companies' shares are bought and sold, functioning much like a marketplace for investments. It matters to investors because it provides a platform to buy and sell ownership stakes in companies, helping them track the value of those companies and make informed decisions. As one of the largest and most technology-focused markets, it also reflects trends and developments in the business world.

FAQ

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

The Form 144 notice states that Atlas Venture Fund XII may sell 18 shares of Disc Medicine, Inc. common stock under Rule 144 through Merrill Lynch on Nasdaq, with reported aggregate market value of $1,428.66. It is a disclosure of potential resale by an existing holder.

How many IRON shares are covered by this Rule 144 notice?

The notice covers a potential sale of 18 shares of Disc Medicine, Inc. common stock. The filing also references an attached table for prior three-month sales, but only the 18 shares are explicitly quantified in this disclosure.

What is the reported market value of the Disc Medicine (IRON) shares in this Form 144?

The Form 144 reports an aggregate market value of $1,428.66 for the 18 shares of Disc Medicine, Inc. common stock that may be sold under this notice.

When were the IRON shares originally acquired by the selling holder?

The shares covered by the notice were acquired on May 1, 2020 in a Private Placement directly from Disc Medicine, Inc., with the consideration described as cash.

How many Disc Medicine (IRON) shares are outstanding according to the Form 144?

The Form 144 lists 38,392,844 shares of Disc Medicine, Inc. common stock as outstanding. This figure is presented in the securities information section as the number of shares or units outstanding.

On which exchange may the Disc Medicine (IRON) shares be sold under this notice?

The notice indicates that the 18 shares of Disc Medicine, Inc. common stock may be sold on the Nasdaq market, with Merrill Lynch named as the broker handling the potential transaction.

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

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Available on EDGAR 09/04/2026 - 04:37 PM Accepted by SEC EDGAR 09/04/2026 - 04:36 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	0001812049
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	Atlas Venture Fund XII, LP
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	Shareholder

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 Stock	Merrill Lynch One Bryant Park New York NY 10036	18	1428.66	38392844	09/04/2026	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 Stock	05/01/2020	Private Placement	Issuer			18	05/01/2020	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	See attached Table II for sales of securities over the last three months.
Date of Notice	09/04/2026
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	Ommer Chohan
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)