[Form 4] NORTHERN TRUST CORP Insider Trading Activity

Rhea-AI Filing Summary

Northern Trust Corp director Donald Thompson reported receiving stock-based awards of common stock rather than making open-market purchases. On March 31, 2026, he acquired 268.68 shares at $139.57 per share, and on April 1, 2026, he acquired 142.85 shares at $141.41 per share as grant or award transactions.

After these awards, Thompson directly held 30,312.85 shares of Northern Trust common stock. The filing also lists an indirect holding of 1,743 shares by a trust. A footnote explains that the reported positions represent stock units payable on a 1-for-1 basis in common shares, underscoring that these are compensation-related equity units rather than discretionary market trades.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider Thompson Donald

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	142.85	$141.41	$20K
Grant/Award	Common Stock	268.68	$139.57	$37K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 30,312.85 shares (Direct); Common Stock — 1,743 shares (Indirect, By Trust)

Footnotes (1)

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Key Figures

Stock award 1: 268.68 shares at $139.57 Stock award 2: 142.85 shares at $141.41 Direct holdings after awards: 30,312.85 shares +1 more

4 metrics

Stock award 1 268.68 shares at $139.57 Grant/award acquisition on March 31, 2026

Stock award 2 142.85 shares at $141.41 Grant/award acquisition on April 1, 2026

Direct holdings after awards 30,312.85 shares Common stock directly held after April 1, 2026 award

Indirect trust holdings 1,743 shares Common stock held indirectly by trust as reported

Key Terms

stock units, grant/award acquisition, By Trust, Form 4

4 terms

stock units financial

"Represents stock units payable automatically on a 1-for-1 basis in shares"

Stock units are individual pieces of ownership in a company, like slices of a pie that together make up the whole business. They matter to investors because each unit represents a claim on the company’s assets, profits and sometimes voting power, and changes in the number or value of these units affect ownership percentages, potential dividends and share dilution — all of which influence an investment’s worth.

grant/award acquisition financial

"Transaction action identified as grant/award acquisition for common stock"

By Trust financial

"Indirect ownership nature described as By Trust for 1,743 shares"

Form 4 regulatory

"Insider transactions are disclosed in a Form 4 filing"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Form 4 Insider Transactions: What Each Field Means →

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^*

Thompson Donald

(Last) (First) (Middle)

50 SOUTH LA SALLE ST

(Street)

CHICAGO ILLINOIS 60603

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/31/2026

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
Common Stock	03/31/2026		A		268.68	A	$139.57	30,170(1)	D
Common Stock	04/01/2026		A		142.85	A	$141.41	30,312.85(1)	D
Common Stock								1,743	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 Donald Thompson	04/02/2026
	** 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)