[Form 4] NORTHERN TRUST CORP Insider Trading Activity

Rhea-AI Filing Summary

Charles A. Tribbett, a director of Northern Trust Corporation (NTRS), reported an acquisition of 91.93 shares of the company's common stock on 10/01/2025 at a reported price of $131.2 per share. Following that transaction the filing shows beneficial ownership of 36,536.43 shares, with 2,822 shares held indirectly by trust. The Form 4 was signed by an attorney-in-fact on 10/02/2025. The filing notes the acquired units represent stock units payable 1-for-1 in shares of the corporation's common stock.

Positive

• Director acquisition: 91.93 shares acquired on 10/01/2025 at $131.2
• Documented beneficial ownership: 36,536.43 shares reported following the transaction

Negative

• None.

Insights

Corporate Governance Analyst

Insider purchase recorded: small director buy and total holdings noted.

The Form 4 discloses that Charles A. Tribbett, identified as a director, acquired 91.93 shares on 10/01/2025 at $131.2 per share. The report lists total beneficial ownership of 36,536.43 shares and 2,822 shares held indirectly by trust.

This filing documents a routine director purchase and updates public records of insider holdings; it does not include other material events such as loans, option grants, or departures.

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

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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^*

Tribbett Charles A

(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)
10/01/2025

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	10/01/2025		A		91.93	A	$131.2	36,536.43(1)	D
Common Stock								2,822	I	By Trust

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.

Remarks:

	David A. Serna, Attorney-in-Fact for Charles A. Tribbett	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 transaction did Charles A. Tribbett report on Form 4 for NTRS?

He reported an acquisition of 91.93 shares of Northern Trust common stock on 10/01/2025 at $131.2 per share.

How many Northern Trust (NTRS) shares does the reporting person beneficially own after the transaction?

The Form 4 shows beneficial ownership of 36,536.43 shares following the reported transaction.

Are any shares held indirectly for Charles A. Tribbett?

Yes, the filing discloses 2,822 shares held indirectly by trust.

When was the Form 4 for this transaction signed?

The signature block shows the form was signed by an attorney-in-fact, David A. Serna, on 10/02/2025.

Do the reported stock units convert to common shares?

Yes, the filing explains the reported stock units are payable automatically on a 1-for-1 basis in shares of the corporation's common stock.