Michael G. O'Grady - 03 Dec 2025 Form 4/A - Amendment Insider Report for NORTHERN TRUST CORP (NTRS)

Role: Chairman and CEO, Director
Signature: David A. Serna, Attorney-In-Fact for Michael G. O'Grady
Issuer symbol: NTRS
Transactions as of: 03 Dec 2025
Net transactions value: $0
Form type: 4/A - Amendment
Filing time: 02 Feb 2026, 17:51:12 UTC
Date Of Original Report: 05 Dec 2025
Previous filing: 29 Apr 2025
Next filing: 02 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
O'Grady Michael	Chairman and CEO, Director	50 SOUTH LA SALLE ST, CHICAGO	David A. Serna, Attorney-In-Fact for Michael G. O'Grady	02 Feb 2026	0001527742

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	NTRS	Common Stock						349,068	03 Dec 2025	By Trust	F1
holding	NTRS	Common Stock						63,986	03 Dec 2025	Direct	F2
holding	NTRS	Common Stock						6,960	03 Dec 2025	By Trust fbo Child 1	F3
holding	NTRS	Common Stock						6,959	03 Dec 2025	By Trust fbo Child 2	F3
holding	NTRS	Common Stock						6,960	03 Dec 2025	By Trust fbo Child 3	F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	This amendment is being filed to correct the amount of shares reported. The share total was not updated to reflect that on July 30, 2025, the reporting person's 2023 grantor retained annuity trust ("GRAT") distributed 5,415.12 shares of the Corporation's common stock to the reporting person's existing trust as an annuity payment.
F2	Represents stock units payable automatically on a 1-for-1 basis in shares of the Corporation's common stock.
F3	The reporting person's spouse is trustee of this trust.