[Form 4] Northern Trust Corp Insider Trading Activity

Rhea-AI Filing Summary

Northern Trust Corp. (NTRS) filed a Form 4 disclosing two open-market purchases by director Donald Thompson.

• 06/30/2025: 293.49 common shares acquired at $126.79.
• 07/01/2025: 140.49 common shares acquired at $127.99.

After these transactions Thompson directly owns 29,053.86 shares and indirectly controls 1,743 shares via a trust. No derivative activity or dispositions were reported. The Form 4 was signed on 07/02/2025 by an attorney-in-fact.

The combined purchase of roughly 434 shares (about $55,000 at the reported prices) modestly increases the director’s stake and represents routine board compensation or personal investment, rather than a material insider move.

Positive

• Director insider purchase: Two purchases totalling ~434 shares suggest incremental confidence and no selling pressure.

Negative

• Immaterial size: Purchase value (~$55k) is insignificant relative to Northern Trust’s market capitalization, limiting informational value.

Insights

Equity Analyst

TL;DR: Small insider buy; signals mild confidence but immaterial to valuation.

The acquisition totals fewer than 500 shares—less than 0.001% of NTRS’s outstanding stock. While insider purchases are generally encouraging, the dollar value (~$55k) is too small to alter earnings outlooks or capital-allocation assumptions. No derivative exercises or sales occurred, so there is no adverse signal. Overall, the filing is a routine update with negligible impact on investment thesis.

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 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)
06/30/2025

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	06/30/2025		A		293.49	A	$126.79	28,913.37(1)	D
Common Stock	07/01/2025		A		140.49	A	$127.99	29,053.86(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	07/02/2025
	** 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

How many NTRS shares did director Donald Thompson buy?

He purchased a combined 433.98 shares over two days.

What prices were paid for the NTRS shares?

Shares were bought at $126.79 and $127.99, respectively.

What is Donald Thompson’s total NTRS holding after the transactions?

He now directly owns 29,053.86 shares and indirectly owns 1,743 shares via a trust.

Did the Form 4 report any NTRS share sales?

No. The filing lists only acquisitions; there were no dispositions.

Does this insider purchase materially affect Northern Trust’s outlook?

Given its small size, analysts view the impact as neutral.