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[Form 4] NORTHERN TRUST CORP Insider Trading Activity

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

SLARK MARTIN P reported acquisition or exercise transactions in this Form 4 filing.

Northern Trust Corp director Martin P. Slark reported equity awards of common stock–linked units. On April 21, 2026, he received 989.0000 shares of Common Stock as a grant or award at $0.0000 per share and an additional 34.8900 shares at $171.7400 per share.

After these awards, Slark directly owned 22,335.4700 shares of Common Stock and indirectly held 4,769.0000 shares through a trust. A footnote states the reported amount represents stock units payable automatically on a 1-for-1 basis in Northern Trust common shares, indicating these awards function as stock-based compensation rather than open-market purchases.

Positive

  • None.

Negative

  • None.
Insider SLARK MARTIN P
Role null
Type Security Shares Price Value
Grant/Award Common Stock 34.89 $171.74 $6K
Grant/Award Common Stock 989 $0.00 --
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 21,346.47 shares (Direct, null); Common Stock — 4,769 shares (Indirect, By Trust)
Footnotes (1)
  1. [object Object]
Equity award at $0.0000 989.0000 shares Grant/award acquisition on April 21, 2026
Equity award at $171.7400 34.8900 shares Grant/award acquisition on April 21, 2026
Direct holdings after transactions 22,335.4700 shares Common Stock held directly after April 21, 2026 awards
Indirect holdings by trust 4,769.0000 shares Common Stock held indirectly by trust
Form 4 regulatory
"INSIDER FILING DATA (Form 4):"
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.
stock units financial
"Represents stock units payable automatically on a 1-for-1 basis"
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.
indirect ownership financial
"total_shares_following_transaction ... direct_or_indirect: "I""
Grant, award, or other acquisition financial
"transaction_code_description: "Grant, award, or other acquisition""
Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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*
SLARK MARTIN P
(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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
04/21/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock04/21/2026A34.89A$171.7421,346.47(1)D
Common Stock04/21/2026A989A$022,335.47(1)D
Common Stock4,769IBy 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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount 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 Martin P. Slark04/23/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR