Question 1

How many shares of MPWR does CONGRESS ASSET MANAGEMENT CO own?

Accepted Answer

As of 2026-Q2, CONGRESS ASSET MANAGEMENT CO holds 80,425 shares of MPWR (MONOLITHIC POWER SYSTEMS INC).

Question 2

What is CONGRESS ASSET MANAGEMENT CO's MPWR position worth?

Accepted Answer

As of 2026-Q2, CONGRESS ASSET MANAGEMENT CO's MPWR position is worth $111.2M.

Question 3

Is CONGRESS ASSET MANAGEMENT CO buying or selling MPWR?

Accepted Answer

In 2026-Q2, CONGRESS ASSET MANAGEMENT CO decreased their MPWR position (-3.5% change in shares).

Question 4

When did CONGRESS ASSET MANAGEMENT CO first buy MPWR?

Accepted Answer

Based on available 13F filings, CONGRESS ASSET MANAGEMENT CO first reported a position in MPWR in 2024-Q3. They have held the position across 30 quarters.

Quarter	Action	Shares	Change	Value	Weight	Price	Conviction
2026-Q2 Latest	Decreased	80,425	-3.5%	$111.2M	0.7%	$1,382.36	0
2026-Q1	Decreased	83,343	-8.1%	$91.1M	0.7%	$1,074.37	0
2025-Q4	Decreased	90,686	-16.2%	$82.2M	0.6%	$922.35	0
2025-Q3	Decreased	108,271	-13.5%	$99.7M	0.7%	$883.54	0
2025-Q2	Increased	125,169	+2.0%	$91.5M	0.6%	$731.94	43
2025-Q1	Decreased	122,660	-6.2%	$71.1M	0.5%	$575.12	0
2024-Q4	Decreased	130,702	-9.4%	$77.3M	0.5%	$597.44	0
2024-Q3	Decreased	144,238	-40.7%	$133.3M	0.9%	$914.24	0