M&G plc
IRM icon

M&G plc’s Iron Mountain IRM Stock Holding History

M&G plc’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
Q3 		$576K Hold
5,193
– – ﹤0.01% 306
2026
Q2 		$654K Hold
5,193
– – ﹤0.01% 325
2026
Q1 		$530K Buy
5,193
+230
+5% +$22.9K ﹤0.01% 342
2025
Q4 		$412K Buy
+4,963
New +$464K ﹤0.01% 338
2025
Q2 		– Sell
-4,376
Closed -$376K – 446
2025
Q1 		$376K Buy
+4,376
New +$422K ﹤0.01% 391

Other funds holding IRM

Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.92T AUM 36.1% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.32T AUM 44.66% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $551B AUM 33.95% 1-Year Est. Return
Principal Financial Group
Principal Financial Group Des Moines, Iowa $195B AUM 21.17% 1-Year Est. Return
Nuveen
Nuveen Charlotte, North Carolina $420B AUM 34.97% 1-Year Est. Return
Deutsche Bank
Deutsche Bank Frankfurt Am Main Ge, Germany $362B AUM 34.89% 1-Year Est. Return
Daiwa Securities Group
Daiwa Securities Group Tokyo, Japan $53.6B AUM 32.29% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $608B AUM 32.77% 1-Year Est. Return
Amundi
Amundi Paris, France $496B AUM 35.36% 1-Year Est. Return
Duff & Phelps Investment Management
Duff & Phelps Investment Management Chicago, Illinois $9.7B AUM 5.22% 1-Year Est. Return

M&G plc's IRM Position: Q3 2026 in Review

M&G plc held its Iron Mountain (IRM) position steady in Q3 2026 at 5,193 shares worth $576K. The position accounts for ﹤0.01% of the portfolio, ranked #306.

M&G plc first reported a position in IRM in Q1 2025 and has held it in 5 quarters since. The position peaked at $654K in Q2 2026. 732 funds tracked by Wall St. Rank hold IRM as of Q3 2026.

  • M&G plc held 5,193 shares of Iron Mountain worth $576K as of Q3 2026.
  • M&G plc left its Iron Mountain share count unchanged in Q3 2026.
  • Iron Mountain made up ﹤0.01% of M&G plc's portfolio in Q3 2026, its #306 holding.
  • M&G plc first reported a position in Iron Mountain in Q1 2025 and has held it in 5 quarters since.
  • M&G plc's Iron Mountain position peaked at $654K in Q2 2026.
  • 732 funds tracked by Wall St. Rank held Iron Mountain as of Q3 2026.

Based on M&G plc's 13F filing for Q3 2026, filed 4 Nov 2026.