RHUMBLINE ADVISERS

CIK

1115418

City

BOSTON

State / Country

Stock

MLAB — Mesa Laboratories Inc /Co/

Top Portfolio Positions

3,465 positions · $113,756,740,880 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	$578,885	6,547	-1.1%	Shares	Sole	2026-05-12
2025-12-31	$519,434	6,617	-12.2%	Shares	Sole	2026-02-13
2025-09-30	$505,255	7,540	-41.1%	Shares	Sole	2025-11-06
2025-06-30	$1,205,356	12,793	-6.1%	Shares	Sole	2025-08-12
2025-03-31	$1,617,098	13,628	+4.4%	Shares	Sole	2025-05-29
2024-12-31	$1,721,958	13,058	-2.5%	Shares	Sole	2025-05-29
2024-09-30	$1,739,474	13,395	-0.4%	Shares	Sole	2024-11-12
2024-06-30	$1,166,535	13,444	-19.2%	Shares	Sole	2024-08-01
2024-03-31	$1,825,468	16,636	+3.0%	Shares	Sole	2024-05-09
2023-12-31	$1,692,664	16,156	+3.7%	Shares	Sole	2024-02-08
2023-09-30	$1,637,515	15,585	+2.2%	Shares	Sole	2023-11-09
2023-06-30	$1,960,010	15,253	+2.2%	Shares	Sole	2023-08-08
2023-03-31	$2,608,544	14,929	+6.4%	Shares	Sole	2023-05-11
2022-12-31	$2,331,427	14,027	+1.6%	Shares	Sole	2023-02-14
2022-09-30	$1,944,439	13,807	+1.5%	Shares	Sole	2022-11-10
2022-06-30	$2,773,176	13,598	-3.4%	Shares	Sole	2022-08-11
2022-03-31	$3,586,926	14,073	+0.7%	Shares	Sole	2022-05-12
2021-12-31	$4,586,698	13,980	+2.1%	Shares	Sole	2022-02-10
2021-09-30	$4,138,703	13,688	-9.5%	Shares	Sole	2021-11-12
2021-06-30	$4,099,819	15,119	+10.7%	Shares	Sole	2021-08-05
2021-03-31	$3,324,992	13,655	+2.3%	Shares	Sole	2021-05-06
2020-12-31	$3,825,784	13,347	+7.5%	Shares	Sole	2021-02-10
2020-09-30	$3,163,100	12,416	+7.3%	Shares	Sole	2020-11-12
2020-06-30	$2,508,376	11,570	-5.7%	Shares	Sole	2020-08-13
2020-03-31	$2,773,446	12,267	—	Shares	Sole	2020-05-06
No 13F history on record for this holder in this stock.