RHUMBLINE ADVISERS

CIK

1115418

City

BOSTON

State / Country

Stock

IRM — Iron Mountain Inc

Top Portfolio Positions

3,471 positions · $113,674,413,224 total · as of Mar 31, 2026

Ticker	Company	Shares	Value (USD)	% of Portfolio
NVDA	Nvidia Corp Technology	42,003,171	$7,325,353,022	6.44%
AAPL	Apple Inc. Technology	25,818,857	$6,552,567,718	5.76%
MSFT	Microsoft Corp Technology	12,999,925	$4,812,182,237	4.23%
AMZN	Amazon Com Inc Consumer Cyclical	16,587,340	$3,454,645,301	3.04%
GOOGL	Alphabet Inc. Communication Services	10,138,654	$2,915,471,344	2.56%
AVGO	Broadcom Inc. Technology	8,207,022	$2,540,155,379	2.23%
META	Meta Platforms, Inc. Communication Services	3,836,760	$2,195,125,498	1.93%
TSLA	Tesla, Inc. Consumer Cyclical	4,844,884	$1,801,085,627	1.58%
BRK-B	Berkshire Hathaway Inc Financial Services	2,848,515	$1,365,008,388	1.20%
JPM	Jpmorgan Chase & Co Financial Services	4,613,123	$1,356,996,261	1.19%

25 quarters · across all stocks

25 quarters on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$59,092,382	578,543	-2.0%	Shares	Sole	2026-05-12
2025-12-31	$48,985,293	590,540	-1.0%	Shares	Sole	2026-02-13
2025-09-30	$60,821,175	596,637	-3.8%	Shares	Sole	2025-11-06
2025-06-30	$63,582,527	619,894	-6.6%	Shares	Sole	2025-08-12
2025-03-31	$57,130,646	664,001	+4.2%	Shares	Sole	2025-05-29
2024-12-31	$66,976,722	637,206	-4.8%	Shares	Sole	2025-05-29
2024-09-30	$79,553,833	669,476	-0.4%	Shares	Sole	2024-11-12
2024-06-30	$60,252,242	672,308	+5.5%	Shares	Sole	2024-08-01
2024-03-31	$51,136,682	637,535	+0.1%	Shares	Sole	2024-05-09
2023-12-31	$44,582,368	637,073	-1.5%	Shares	Sole	2024-02-08
2023-09-30	$38,467,657	647,059	-0.3%	Shares	Sole	2023-11-09
2023-06-30	$36,883,737	649,133	-1.4%	Shares	Sole	2023-08-08
2023-03-31	$34,824,938	658,192	+5.4%	Shares	Sole	2023-05-11
2022-12-31	$31,120,457	624,282	+7.5%	Shares	Sole	2023-02-14
2022-09-30	$25,542,920	580,917	+2.7%	Shares	Sole	2022-11-10
2022-06-30	$27,531,030	565,435	+9.2%	Shares	Sole	2022-08-11
2022-03-31	$28,679,163	517,581	-3.7%	Shares	Sole	2022-05-12
2021-12-31	$28,130,985	537,569	+3.5%	Shares	Sole	2022-02-10
2021-09-30	$22,571,058	519,472	+0.9%	Shares	Sole	2021-11-12
2021-06-30	$21,794,080	514,983	-4.7%	Shares	Sole	2021-08-05
2021-03-31	$20,004,719	540,522	-9.6%	Shares	Sole	2021-05-06
2020-12-31	$17,618,427	597,640	+0.7%	Shares	Sole	2021-02-10
2020-09-30	$15,892,872	593,239	-1.4%	Shares	Sole	2020-11-12
2020-06-30	$15,700,481	601,551	+2.7%	Shares	Sole	2020-08-13
2020-03-31	$13,943,420	585,858	—	Shares	Sole	2020-05-06
No 13F history on record for this holder in this stock.