Harbor Capital Advisors’s Iron Mountain IRM Stock Holding History

Harbor Capital Advisors’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	–	Sell	-1,297	Closed	-$108K	–	1363
2025 Q4	$108K	Buy	1,297 +1,035	+395%	+$96.9K	0.01%	676
2025 Q3	$27K	Sell	262 -3	-1%	-$289	﹤0.01%	749
2025 Q2	$27K	Sell	265 -1	-0.4%	-$94	﹤0.01%	761
2025 Q1	$23K	Sell	266 -369	-58%	-$35.6K	﹤0.01%	784
2024 Q4	$67K	Sell	635 -35	-5%	-$4.11K	﹤0.01%	720
2024 Q3	$80K	Buy	+670	New	+$71.7K	﹤0.01%	727

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

Harbor Capital Advisors's IRM Position: Q1 2026 in Review

Harbor Capital Advisors sold out of Iron Mountain (IRM) in Q1 2026, closing a stake of 1,297 shares — an estimated $108K sold.

Harbor Capital Advisors first reported a position in IRM in Q3 2024 and held it in 6 quarters. The position peaked at $108K in Q4 2025. 1,082 funds tracked by Wall St. Rank hold IRM as of Q1 2026.

Harbor Capital Advisors reported no remaining Iron Mountain position as of Q1 2026 after selling out during the quarter.
Harbor Capital Advisors sold 1,297 Iron Mountain shares in Q1 2026, an estimated $108K.
Harbor Capital Advisors first reported a position in Iron Mountain in Q3 2024 and held it in 6 quarters.
Harbor Capital Advisors's Iron Mountain position peaked at $108K in Q4 2025.
1,082 funds tracked by Wall St. Rank held Iron Mountain as of Q1 2026.

Based on Harbor Capital Advisors's 13F filing for Q1 2026, filed 28 Apr 2026.