[Form 4] NORTHERN TRUST CORP Insider Trading Activity

Rhea-AI Filing Summary

Northern Trust Corporation (NTRS) reporting person Dean M. Harrison recorded non-derivative purchases of the company’s common stock in late 2025. On 09/30/2025 he acquired 334.32 shares at $134.6 and on 10/01/2025 he acquired 154.72 shares at $131.2, increasing his direct beneficial holdings to 32,538.56 shares. The filing also shows 1,000 shares owned indirectly by a trust and 47 shares indirectly by an LLC. The form corrects an earlier reporting error for an April 1, 2025 amount (actual 171.60 shares vs previously reported 168.49).

Positive

• Purchased 334.32 shares on 09/30/2025 at $134.6
• Purchased 154.72 shares on 10/01/2025 at $131.2
• Maintains indirect holdings of 1,000 (trust) and 47 (LLC) shares
• Filed a correction to previously reported April 1, 2025 share amount

Negative

• Previously filed April 24, 2025 Form 4 contained an incorrect share amount (168.49 reported vs actual 171.60)

10/02/2025 - 04:18 PM

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
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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).

1. Name and Address of Reporting Person^*

Harrison Dean M

(Last) (First) (Middle)

50 SOUTH LA SALLE ST

(Street)

CHICAGO IL 60603

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
NORTHERN TRUST CORP [ NTRS ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
09/30/2025

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
Common Stock	09/30/2025		A		334.32	A	$134.6	32,383.84(1)(2)	D
Common Stock	10/01/2025		A		154.72	A	$131.2	32,538.56(1)(2)	D
Common Stock								1,000	I	By Trust
Common Stock								47	I	By LLC

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. Represents stock units payable automatically on a 1-for-1 basis in shares of the Corporation's common stock.

2. Reflects a correction to the amount of shares on April 1, 2025, previously reported on a Form 4 filed April 24, 2025. The actual amount on such date was 171.60 shares, rather than the 168.49 shares originally reported.

Remarks:

	David A. Serna, Attorney-in-Fact for Dean M. Harrison	10/02/2025
	** 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.

FAQ

What trades did Dean M. Harrison report for NTRS?

He reported purchases of 334.32 shares on 09/30/2025 at $134.6 and 154.72 shares on 10/01/2025 at $131.2.

How many NTRS shares does the reporting person beneficially own after these transactions?

The filing reports 32,538.56 shares beneficially owned following the reported transactions.

Are there any indirect holdings disclosed in the Form 4 for NTRS?

Yes. The filing shows 1,000 shares held indirectly by a trust and 47 shares held indirectly by an LLC.

Was there a correction in this Form 4 filing?

Yes. It corrects an April 1, 2025 amount previously reported on a Form 4 filed April 24, 2025: the actual amount was 171.60 shares, not 168.49.

What is the reporting relationship of Dean M. Harrison to Northern Trust?

The form indicates the reporting person is a Director of Northern Trust Corporation.