Immuneering officer buys 2,298 shares at $4.57

Immuneering Corp's Chief Scientific Officer, Brett Matthew Hall, reported buying Class A Common Stock in an insider transaction.

Rhea-AI Filing Summary

Immuneering Corp's Chief Scientific Officer, Brett Matthew Hall, reported buying Class A Common Stock in an insider transaction. On January 15, 2026, he purchased 2,298 shares at a weighted average price of $4.57 per share through a broker-dealer.

After this purchase, Hall directly beneficially owns 376,496 shares of Immuneering Class A Common Stock. The trade was executed in multiple lots at prices ranging from $4.57 to $4.571, with the weighted average price reported in the filing.

Insider Trade Summary

Net Buyer: 2,298 shares

Net Buy 1 txn

Insider Hall Brett Matthew

Role CHIEF SCIENTIFIC OFFICER

Bought 2,298 shs ($11K)

Type	Security	Shares	Price	Value
Purchase	Class A Common Stock	2,298	$4.57	$11K

Holdings After Transaction: Class A Common Stock — 376,496 shares (Direct)

Footnotes (1)

1. F1. This transaction was executed in multiple trades through a broker-dealer at prices ranging from $4.57 to $4.571. The price reported in this column reflects the weighted average purchase price. Upon request, the reporting person will provide to the SEC staff full information regarding the number of shares acquired at each price.

FAQ

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

What insider transaction did IMRX report for Brett Matthew Hall?

Immuneering Corp (IMRX) reported that Chief Scientific Officer Brett Matthew Hall purchased 2,298 shares of Class A Common Stock on January 15, 2026.

At what price did the Immuneering CSO buy IMRX shares?

The reported weighted average purchase price was $4.57 per share, with individual trades executed between $4.57 and $4.571.

How many Immuneering (IMRX) shares does Brett Matthew Hall own after this trade?

Following the reported transaction, Brett Matthew Hall beneficially owns 376,496 shares of Immuneering Class A Common Stock directly.

What type of security did the Immuneering insider purchase?

The insider purchased Class A Common Stock of Immuneering Corp.

Was the IMRX insider transaction executed in a single trade or multiple trades?

The purchase was executed in multiple trades through a broker-dealer, with prices ranging from $4.57 to $4.571 per share.

What SEC form reported Brett Matthew Hall’s IMRX share purchase?

The transaction was reported on a Form 4, which discloses changes in beneficial ownership by company insiders.

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

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 01/16/2026 - 04:07 PM 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^*

Hall Brett Matthew

(Last) (First) (Middle)

245 MAIN STREET

SECOND FLOOR

(Street)

CAMBRIDGE MA 02142

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Immuneering Corp [ IMRX ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
01/15/2026

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

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

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

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
Class A Common Stock	01/15/2026		P		2,298	A	$4.57(1)	376,496	D

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

Explanation of Responses:

1. This transaction was executed in multiple trades through a broker-dealer at prices ranging from $4.57 to $4.571. The price reported in this column reflects the weighted average purchase price. Upon request, the reporting person will provide to the SEC staff full information regarding the number of shares acquired at each price.

Remarks:

	/s/ Michael D. Bookman, Attorney-in-Fact for Brett Matthew Hall	01/16/2026
	** 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.