Woodline Partners’s Iron Mountain IRM Stock Holding History

Woodline Partners’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	$5.91M	Buy	57,860 +7,507	+15%	+$747K	0.02%	631
2025 Q4	$4.18M	Buy	50,353 +11,395	+29%	+$1.07M	0.02%	664
2025 Q3	$3.97M	Buy	38,958 +7,119	+22%	+$686K	0.02%	610
2025 Q2	$3.27M	Buy	31,839 +7,097	+29%	+$669K	0.02%	635
2025 Q1	$2.13M	Buy	24,742 +7,193	+41%	+$693K	0.01%	657
2024 Q4	$1.84M	Buy	+17,549	New	+$2.06M	0.01%	666

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

Woodline Partners's IRM Position: Q1 2026 in Review

Woodline Partners increased its Iron Mountain (IRM) stake by 15% in Q1 2026, buying an estimated $747K and bringing the position to 57,860 shares worth $5.91M. The position accounts for 0.02% of the portfolio, ranked #631.

Woodline Partners first reported a position in IRM in Q4 2024 and has held it in 6 quarters since. 1,082 funds tracked by Wall St. Rank hold IRM as of Q1 2026.

Woodline Partners held 57,860 shares of Iron Mountain worth $5.91M as of Q1 2026.
Woodline Partners bought 7,507 Iron Mountain shares in Q1 2026, an estimated $747K.
Iron Mountain made up 0.02% of Woodline Partners's portfolio in Q1 2026, its #631 holding.
Woodline Partners first reported a position in Iron Mountain in Q4 2024 and has held it in 6 quarters since.
1,082 funds tracked by Wall St. Rank held Iron Mountain as of Q1 2026.

Based on Woodline Partners's 13F filing for Q1 2026, filed 15 May 2026.