Disc Medicine holder plans sale of 54 shares

Disc Medicine, Inc. (IRON) received a notice of proposed sale of restricted shares under Rule 144 by Atlas Venture Fund XII.

Rhea-AI Filing Summary

Disc Medicine, Inc. (IRON) received a notice of proposed sale of restricted shares under Rule 144 by Atlas Venture Fund XII. The filing covers 54 shares of Common Stock, originally acquired in a private placement on May 1, 2020, with the shares listed on Nasdaq.

Key Figures

Shares to be sold under Rule 144: 54 shares Aggregate market value reference: $4,322.70 Shares outstanding: 38,392,844 shares +2 more

5 metrics

Shares to be sold under Rule 144 54 shares Common Stock of Disc Medicine, Inc. covered by this notice

Aggregate market value reference $4,322.70 Figure presented alongside the 54 shares of Common Stock

Shares outstanding 38,392,844 shares Common Stock outstanding as referenced in the notice dated September 3, 2026

Acquisition date of securities May 1, 2020 Date the 54 shares were acquired in a private placement for cash

Date of Rule 144 notice September 3, 2026 Date the notice of proposed sale was signed and filed

Key Terms

Rule 144, Private Placement, Common Stock, Nasdaq

4 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.

Common Stock financial

"Common Stock | Merrill Lynch One Bryant Park New York NY 10036"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Nasdaq market

"38392844 | 09/03/2026 | 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 filed for Disc Medicine (IRON) disclose?

It discloses that Atlas Venture Fund XII has filed a notice of proposed sale under Rule 144 for 54 shares of Disc Medicine, Inc. common stock, which were originally acquired in a private placement on May 1, 2020.

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

The notice covers 54 shares of Disc Medicine, Inc. common stock. The filing is a regulatory step indicating potential sales under Rule 144 rather than a confirmation that all shares have been sold.

Who is selling Disc Medicine (IRON) shares under this Form 144?

The selling holder is Atlas Venture Fund XII. The shares are being sold for that fund’s account under Rule 144, which governs resales of restricted and control securities in the public markets.

How and when were the Disc Medicine (IRON) shares originally acquired?

The 54 shares of common stock covered by the notice were originally acquired on May 1, 2020 in a private placement from the issuer, Disc Medicine, Inc., for cash consideration.

On which market are the Disc Medicine (IRON) shares listed in this filing?

The filing states that the Disc Medicine, Inc. common stock covered by the notice is listed on Nasdaq, with Merrill Lynch identified in the broker information section.

How many Disc Medicine (IRON) shares were outstanding as referenced in the notice?

The filing references 38,392,844 shares of Disc Medicine, Inc. common stock as outstanding in connection with the Rule 144 notice dated September 3, 2026.

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

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Available on EDGAR 09/03/2026 - 05:38 PM Accepted by SEC EDGAR 09/03/2026 - 05:09 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	54	4322.7	38392844	09/03/2026	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			54	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	09/03/2026
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)