Yorktown Management & Research Co Inc

Position in MPWR — Monolithic Power Systems, Inc.

CIK 1313559 Forest, VA

Position in MPWR

as of Jun 30, 2026 · filed Jul 23, 2026 Compact

Position Value

$898,534

+$187,857 QoQ

Shares Held

650

0.0% QoQ

Ownership

0.001%

of shares outstanding

% of Portfolio

0.59%

of 13F equity value

Holder Rank

#660

of 1,236 holders

Holding Since

Mar 2020

26 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Technology · as of Jun 30, 2026

Yorktown Management & Research Co Inc holds $4,171,642 across 5 Semiconductors names. MPWR ranks #2 (21.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	SMTC	Semtech Corp	6,850	$1,108,672
2	MPWR	Monolithic Power Systems, Inc. This page	650	$898,534
3	ALGM	Allegro Microsystems, Inc.	11,300	$786,706
4	CRDO	Credo Technology Group Holding Ltd	2,650	$720,667
5	RMBS	Rambus Inc	4,950	$657,063

26 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$898,534	650	0.0%	Shares	Sole	2026-07-23
2026-03-31	$710,677	650	0.0%	Shares	Sole	2026-04-20
2025-12-31	$589,134	650	0.0%	Shares	Sole	2026-01-23
2025-09-30	$598,416	650	0.0%	Shares	Sole	2025-10-29
2025-06-30	$475,397	650	0.0%	Shares	Sole	2025-08-04
2025-03-31	$376,987	650	0.0%	Shares	Sole	2025-04-23
2024-12-31	$384,605	650	0.0%	Shares	Sole	2025-01-27
2024-09-30	$600,925	650	0.0%	Shares	Sole	2024-10-25
2024-06-30	$534,092	650	0.0%	Shares	Sole	2024-07-30
2024-03-31	$440,323	650	0.0%	Shares	Sole	2024-04-26
2023-12-31	$410,007	650	0.0%	Shares	Sole	2024-01-26
2023-09-30	$300,300	650	-50.0%	Shares	Sole	2023-10-26
2023-06-30	$702,299	1,300	0.0%	Shares	Sole	2023-07-28
2023-03-31	$650,702	1,300	0.0%	Shares	Sole	2023-04-21
2022-12-31	$459,693	1,300	0.0%	Shares	Sole	2023-01-26
2022-09-30	$472,420	1,300	0.0%	Shares	Sole	2022-11-04
2022-06-30	$499,252	1,300	0.0%	Shares	Sole	2022-07-29
2022-03-31	$631,384	1,300	0.0%	Shares	Sole	2022-04-29
2021-12-31	$641,329	1,300	0.0%	Shares	Sole	2022-02-09
2021-09-30	$630,084	1,300	0.0%	Shares	Sole	2021-11-04
2021-06-30	$485,485	1,300	-56.7%	Shares	Sole	2021-08-03
2021-03-31	$1,059,630	3,000	0.0%	Shares	Sole	2021-05-11
2020-12-31	$1,098,690	3,000	0.0%	Shares	Sole	2021-02-11
2020-09-30	$838,830	3,000	0.0%	Shares	Sole	2020-11-06
2020-06-30	$711,000	3,000	-36.2%	Shares	Sole	2020-08-11
2020-03-31	$787,062	4,700	—	Shares	Sole	2020-04-29
No filing history on record for this holder in this stock.