Disc Medicine director receives 6,212 stock options

Disc Medicine director Mark Chin received a new stock option grant.

Rhea-AI Filing Summary

Disc Medicine director Mark Chin received a new stock option grant. On the reported date, he was awarded options covering 6,212 shares of Disc Medicine common stock at an exercise price of $70.79 per share, expiring on June 17, 2036.

The options were granted as compensation and carry no upfront purchase cost, with a grant price of $0.00. According to the terms, the underlying shares vest on the earlier of the company’s 2027 annual shareholder meeting or the one-year anniversary of the grant date, provided he continues serving as a director.

Insider Trade Summary

Grant/Award: 6,212 shares

Grant/Award 1 txn

Insider Chin Mark

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (Right to Buy)	6,212	$0.00	$0.00

Holdings After Transaction: Stock Option (Right to Buy) — 6,212 contracts (Direct)

Footnotes (1)

1. F1. The shares underlying this option vest upon the first to occur of (i) the date of the Company's 2027 annual meeting of its stockholders, or (ii) the one-year anniversary of the grant date, subject to the Reporting Person's continued service on such vesting date.

Key Figures

Option grant size: 6,212 shares Exercise price: $70.79 per share Options expiration: June 17, 2036 +1 more

4 metrics

Option grant size 6,212 shares Stock options on common stock granted to director

Exercise price $70.79 per share Strike price for the 6,212-share option award

Options expiration June 17, 2036 Final expiration date of the option grant

Grant cost $0.00 per option Compensation award with no upfront purchase price

Key Terms

Stock Option (Right to Buy), exercise price, expiration date, underlying security, +1 more

5 terms

Stock Option (Right to Buy) financial

"security_title: "Stock Option (Right to Buy)""

exercise price financial

"conversion_or_exercise_price: "70.7900""

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

expiration date financial

"expiration_date: "2036-06-17T00:00:00.000Z""

The expiration date is the deadline after which a financial contract, such as an option or a futures agreement, is no longer valid or can be exercised. It matters to investors because it determines the timeframe during which they can take action or benefit from the contract, similar to how a coupon or a food item has a limited period of usefulness. Once the expiration date passes, the contract loses its value or ability to be used.

underlying security financial

"underlying_security_title: "Common Stock""

vest financial

"The shares underlying this option vest upon the first to occur"

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

FAQ

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

What did Disc Medicine (IRON) director Mark Chin report in this Form 4?

Mark Chin reported receiving a stock option grant for 6,212 shares of Disc Medicine common stock. These options are a compensation award, not an open-market purchase, and give him the right to buy shares at a fixed exercise price in the future.

How many Disc Medicine (IRON) shares are covered by Mark Chin’s new options?

The new stock option grant covers 6,212 shares of Disc Medicine common stock. This figure represents the maximum number of shares he can purchase under this particular option award if the options vest and are later exercised.

What is the exercise price of Mark Chin’s Disc Medicine (IRON) stock options?

The options have an exercise price of $70.79 per share. This is the fixed price at which he can buy Disc Medicine common stock if the options vest and he chooses to exercise them before the expiration date in 2036.

When do Mark Chin’s Disc Medicine (IRON) stock options vest?

The options vest on the earlier of the company’s 2027 annual shareholder meeting or the one-year anniversary of the grant date. Vesting is contingent on his continued service as a director through that vesting date, according to the award’s terms.

When do Mark Chin’s Disc Medicine (IRON) stock options expire?

The stock options expire on June 17, 2036. After this expiration date, any unexercised portion of the 6,212-share award will lapse, and he will no longer have the right to purchase shares under this specific option grant.

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

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Accepted by SEC EDGAR 06/23/2026 - 04:58 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Chin Mark

(Last) (First) (Middle)

C/O DISC MEDICINE, INC.

321 ARSENAL STREET, SUITE 101

(Street)

WATERTOWN MASSACHUSETTS 02472

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Disc Medicine, Inc. [ IRON ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/18/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	$70.79	06/18/2026		A		6,212		(1)	06/17/2036	Common Stock	6,212	$0	6,212	D

Explanation of Responses:

1. The shares underlying this option vest upon the first to occur of (i) the date of the Company's 2027 annual meeting of its stockholders, or (ii) the one-year anniversary of the grant date, subject to the Reporting Person's continued service on such vesting date.

	By: /s/ Rahul Khara, as Attorney-in-Fact	06/23/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)