NTRS

NORTHERN TRUST CORP

12 superinvestors own NTRS

Based on latest 13F filings — data is 45–90 days delayed

Investor	Fund	Weight	Shares	Value	Quarter	Activity
Valley Forge Capital Management	Valley Forge Capital Management	2.01%	175,480	$10.5M	2009Q1	Reduced
Meridian / ArrowMark	Meridian Contrarian Fund	2.01%	68,000	$3.6M	2009Q4	New
Ariel Investments	Ariel Investments (Bobrinskoy & Rogers)	1.78%	1,141,118	$159.3M	2026Q1	Reduced
Thomas Gayner	Markel Group	0.44%	130,000	$8.6M	2007Q3	Held
David Katz	Matrix Asset Advisors	0.19%	12,385	$1.0M	2000Q4	New
Yacktman Asset Management	Yacktman Asset Management	0.02%	9,500	$1.3M	2026Q1	Held
Ruane Cunniff	Sequoia Fund	0.01%	11,200	$729K	2000Q2	New
Mairs & Power	Mairs & Power Growth Fund	0.00%	2,400	$335K	2026Q1	Held
Kenneth Fisher	Fisher Asset Management	0.00%	2,248	$314K	2026Q1	Reduced
Christopher Davis	Davis Selected Advisers	0.00%	30,000	$1.4M	2003Q4	Held
Bill Nygren	Oakmark Select Fund – Harris Associates	0.00%	2,652	$236K	2016Q4	Reduced
Dodge & Cox	Dodge & Cox	0.00%	8,000	$401K	2012Q4	Held

Open-market purchases (P) and sales (S) from SEC Form 4 filings · last 12 months

No open-market insider trades in the last 12 months.

Form 4 filings for option exercises and other transaction types are excluded.

STOCK Act disclosures · last 12 months

Congressional trade data coming soon.

We are sourcing STOCK Act disclosures and will display them here shortly.

What Is SEC Form 4?

Understand the insider trade filings behind NTRS activity.

What Is a 13F Filing?

How superinvestors disclose their quarterly holdings.

Insider Cluster Buying

Why multiple insiders buying together is a strong signal.

Superinvestor Consensus

The most widely held stocks across all tracked institutions.