Vanguard Portfolio Management
IRM icon

Vanguard Portfolio Management’s Iron Mountain IRM Stock Holding History

Vanguard Portfolio Management’s Portfolio IRM Stock Details IRM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$3.23B Buy
25,568,944
+553,387
+2% +$67.8M 0.15% 116
2026
Q1 		$2.56B Buy
+25,015,557
New +$2.49B 0.13% 148

Other funds holding IRM

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Cohen & Steers
Cohen & Steers New York $63.2B AUM 17.15% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Principal Financial Group
Principal Financial Group Des Moines, Iowa $204B AUM 27.99% 1-Year Est. Return
Charles Schwab
Charles Schwab San Francisco, California $751B AUM 38.74% 1-Year Est. Return
Northern Trust
Northern Trust Chicago, Illinois $860B AUM 41.15% 1-Year Est. Return

Vanguard Portfolio Management's IRM Position: Q2 2026 in Review

Vanguard Portfolio Management increased its Iron Mountain (IRM) stake by 2.2% in Q2 2026, buying an estimated $67.8M and bringing the position to 25,568,944 shares worth $3.23B. The position accounts for 0.15% of the portfolio, ranked #116.

Vanguard Portfolio Management first reported a position in IRM in Q1 2026 and has held it in 2 quarters since. 1,109 funds tracked by Wall St. Rank hold IRM as of Q2 2026.

  • Vanguard Portfolio Management held 25,568,944 shares of Iron Mountain worth $3.23B as of Q2 2026.
  • Vanguard Portfolio Management bought 553,387 Iron Mountain shares in Q2 2026, an estimated $67.8M.
  • Iron Mountain made up 0.15% of Vanguard Portfolio Management's portfolio in Q2 2026, its #116 holding.
  • Vanguard Portfolio Management first reported a position in Iron Mountain in Q1 2026 and has held it in 2 quarters since.
  • 1,109 funds tracked by Wall St. Rank held Iron Mountain as of Q2 2026.

Based on Vanguard Portfolio Management's 13F filing for Q2 2026, filed 13 Aug 2026.