Two Sigma Investments’s Iron Mountain IRM Stock Holding History

Two Sigma Investments’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	$511K	Buy	+5,000	New	+$497K	﹤0.01%	3735
2022 Q1	–	Sell	-32,200	Closed	-$1.69M	–	3456
2021 Q4	$1.69M	Buy	32,200 +25,800	+403%	+$1.22M	﹤0.01%	2082
2021 Q3	$278K	Sell	6,400 -3,500	-35%	-$158K	﹤0.01%	3727
2021 Q2	$419K	Sell	9,900 -3,000	-23%	-$126K	﹤0.01%	3242
2021 Q1	$477K	Buy	12,900 +5,900	+84%	+$197K	﹤0.01%	2975
2020 Q4	$206K	Sell	7,000 -7,500	-52%	-$208K	﹤0.01%	3104
2020 Q3	$388K	Sell	14,500 -24,900	-63%	-$709K	﹤0.01%	2415
2020 Q2	$1.03M	Buy	39,400 +21,100	+115%	+$533K	0.01%	1524
2020 Q1	$436K	Sell	18,300 -6,300	-26%	-$191K	﹤0.01%	2044
2019 Q4	$784K	Sell	24,600 -39,700	-62%	-$1.3M	﹤0.01%	2415
2019 Q3	$2.08M	Buy	64,300 +30,400	+90%	+$955K	0.01%	1406
2019 Q2	$1.06M	Buy	33,900 +24,900	+277%	+$816K	﹤0.01%	1894
2019 Q1	$319K	Sell	9,000 -9,000	-50%	-$318K	﹤0.01%	2558
2018 Q4	$583K	Sell	18,000 -3,300	-15%	-$108K	﹤0.01%	2002
2018 Q3	$735K	Sell	21,300 -16,000	-43%	-$570K	﹤0.01%	2197
2018 Q2	$1.31M	Buy	37,300 +18,100	+94%	+$611K	﹤0.01%	1941
2018 Q1	$631K	Buy	+19,200	New	+$647K	﹤0.01%	2328
2017 Q3	–	Sell	-7,000	Closed	-$241K	–	2964
2017 Q2	$241K	Buy	+7,000	New	+$245K	﹤0.01%	2733
2017 Q1	–	Sell	-40,000	Closed	-$1.3M	–	3091
2016 Q4	$1.3M	Sell	40,000 -27,600	-41%	-$918K	0.01%	1817
2016 Q3	$2.54M	Buy	67,600 +60,200	+814%	+$2.32M	0.01%	1297
2016 Q2	$295K	Buy	+7,400	New	+$269K	﹤0.01%	2575

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

Two Sigma Investments's IRM Position: Q1 2026 in Review

Two Sigma Investments reduced its Iron Mountain (IRM) stake by 38% in Q1 2026, selling an estimated $11M and leaving 179,202 shares worth $18.3M. The position accounts for 0.01% of the portfolio, ranked #1001.

Two Sigma Investments first reported a position in IRM in Q2 2013 and has held it in 22 quarters since. The position peaked at $45.3M in Q2 2016. 1,082 funds tracked by Wall St. Rank hold IRM as of Q1 2026.

Two Sigma Investments held 179,202 shares of Iron Mountain worth $18.3M as of Q1 2026.
Two Sigma Investments sold 110,958 Iron Mountain shares in Q1 2026, an estimated $11M.
Iron Mountain made up 0.01% of Two Sigma Investments's portfolio in Q1 2026, its #1001 holding.
Two Sigma Investments first reported a position in Iron Mountain in Q2 2013 and has held it in 22 quarters since.
Two Sigma Investments's Iron Mountain position peaked at $45.3M in Q2 2016.
1,082 funds tracked by Wall St. Rank held Iron Mountain as of Q1 2026.

Based on Two Sigma Investments's 13F filing for Q1 2026, filed 15 May 2026.