Ostrum Asset Management’s Iron Mountain IRM Stock Holding History

Ostrum Asset 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 Q1	$942K	Buy	9,222 +8,322	+925%	+$828K	0.05%	227
2025 Q4	$74.7K	Sell	900 -300	-25%	-$28.1K	﹤0.01%	546
2025 Q3	$122K	Sell	1,200 -3,898	-76%	-$376K	0.01%	529
2025 Q2	$523K	Sell	5,098 -146	-3%	-$13.8K	0.02%	401
2025 Q1	$451K	Sell	5,244 -3,784	-42%	-$365K	0.02%	425
2024 Q4	$949K	Sell	9,028 -373	-4%	-$43.8K	0.08%	313
2024 Q3	$1.12M	Buy	9,401 +115	+1%	+$12.3K	0.09%	295
2024 Q2	$832K	Sell	9,286 -18,238	-66%	-$1.48M	0.07%	324
2024 Q1	$2.21M	Hold	27,524	–	–	0.17%	208
2023 Q4	$1.93M	Buy	27,524 +3,237	+13%	+$203K	0.17%	200
2023 Q3	$1.44M	Buy	24,287 +4,948	+26%	+$302K	0.13%	235
2023 Q2	$1.1M	Buy	19,339 +74	+0.4%	+$4.05K	0.09%	301
2023 Q1	$1.02M	Buy	+19,265	New	+$1.01M	0.09%	306

Other funds holding IRM

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Cohen & Steers New York $57.6B AUM 8.03% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Principal Financial Group Des Moines, Iowa $187B AUM 18.48% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Ostrum Asset Management's IRM Position: Q1 2026 in Review

Ostrum Asset Management increased its Iron Mountain (IRM) stake by 925% in Q1 2026, buying an estimated $828K and bringing the position to 9,222 shares worth $942K. The position accounts for 0.05% of the portfolio, ranked #227.

Ostrum Asset Management first reported a position in IRM in Q1 2023 and has held it in 13 quarters since. The position peaked at $2.21M in Q1 2024. 1,082 funds tracked by Wall St. Rank hold IRM as of Q1 2026.

Ostrum Asset Management held 9,222 shares of Iron Mountain worth $942K as of Q1 2026.
Ostrum Asset Management bought 8,322 Iron Mountain shares in Q1 2026, an estimated $828K.
Iron Mountain made up 0.05% of Ostrum Asset Management's portfolio in Q1 2026, its #227 holding.
Ostrum Asset Management first reported a position in Iron Mountain in Q1 2023 and has held it in 13 quarters since.
Ostrum Asset Management's Iron Mountain position peaked at $2.21M in Q1 2024.
1,082 funds tracked by Wall St. Rank held Iron Mountain as of Q1 2026.

Based on Ostrum Asset Management's 13F filing for Q1 2026, filed 14 May 2026.