FACTORY MUTUAL INSURANCE CO

Insurance

Position in MPWR — Monolithic Power Systems, Inc.

CIK 887818 WALTHAM, MA

Position in MPWR

as of Jun 30, 2026 · filed Jul 21, 2026 Compact

Position Value

$49,014,338

+$5,310,952 QoQ

Shares Held

35,457

-11.3% QoQ

Ownership

0.072%

of shares outstanding

% of Portfolio

0.66%

of 13F equity value

Holder Rank

#133

of 1,236 holders

Holding Since

Sep 2023

12 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Technology · as of Jun 30, 2026

FACTORY MUTUAL INSURANCE CO holds $1,476,568,197 across 12 Semiconductors names. MPWR ranks #7 (3.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	NVDA	Nvidia Corp	2,833,098	$566,874,578
2	AVGO	Broadcom Inc.	720,520	$272,176,430
3	MU	Micron Technology Inc	151,095	$174,407,447
4	TSM	Taiwan Semiconductor Manufacturing Co Ltd	316,675	$151,234,479
5	AMD	Advanced Micro Devices Inc	211,572	$122,904,290
6	MRVL	Marvell Technology, Inc.	197,209	$58,746,589
7	MPWR	Monolithic Power Systems, Inc. This page	35,457	$49,014,338
8	TXN	Texas Instruments Inc	108,650	$32,385,305

12 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$49,014,338	35,457	-11.3%	Shares	Sole	2026-07-21
2026-03-31	$43,703,386	39,972	+1.8%	Shares	Sole	2026-05-05
2025-12-31	$35,594,569	39,272	-1.8%	Shares	Sole	2026-01-23
2025-09-30	$36,799,822	39,972	0.0%	Shares	Sole	2025-11-10
2025-06-30	$29,234,721	39,972	0.0%	Shares	Sole	2025-08-07
2025-03-31	$23,182,960	39,972	+27.8%	Shares	Sole	2025-04-17
2024-12-31	$18,503,642	31,272	+132.1%	Shares	Sole	2025-01-24
2024-09-30	$12,454,864	13,472	+96.5%	Shares	Sole	2024-10-10
2024-06-30	$5,633,438	6,856	0.0%	Shares	Sole	2024-07-23
2024-03-31	$4,644,391	6,856	0.0%	Shares	Sole	2024-04-12
2023-12-31	$4,324,627	6,856	0.0%	Shares	Sole	2024-01-23
2023-09-30	$3,167,472	6,856	—	Shares	Sole	2023-11-07
No filing history on record for this holder in this stock.