# MONOLITHIC PWR SYS INC (MPWR) — Institutional Ownership

Source: SEC EDGAR 13F filings, congressional STOCK Act disclosures, SEC Form 4 insider transactions.
CUSIP: 609839105
Page URL: https://superinvestorclub.com/stock/MPWR
Last updated: 2026-07-08T13:33:15.089Z

## Summary

As of the most recent 13F filing period, MONOLITHIC PWR SYS INC (MPWR) is held by 2 tracked superinvestors with an aggregate position value of $17.1M representing 0119423707 shares.

## Top institutional holders (2)

| Rank | Manager | Fund | Shares | Value | % of Portfolio | Period |
|------|---------|------|--------|-------|----------------|--------|
| 1 | [Ray Dalio](https://superinvestorclub.com/manager/6) | Bridgewater Associates | 11942 | $13.1M | 0.06% | 2026-03-31 |
| 2 | [Torray LLC](https://superinvestorclub.com/manager/3250) | Torray LLC | 3707 | $4.1M | 0.59% | 2026-03-31 |

## Ownership history (quarter-over-quarter)

- 2024-12-31: 1 holders, $1.9M aggregate, 03128 shares
- 2025-03-31: 3 holders, $115.9M aggregate, 019343232763052 shares
- 2025-06-30: 1 holders, $2.2M aggregate, 03054 shares
- 2025-09-30: 1 holders, $3.6M aggregate, 03957 shares
- 2025-12-31: 2 holders, $6.5M aggregate, 042492871 shares
- 2026-03-31: 2 holders, $17.1M aggregate, 0119423707 shares

## Recent congressional trades (8)

- 2026-01-05: Markwayne Mullin (Republican-OK) purchase $15,001 - $50,000
- 2025-10-20: Michael Guest (Republican-MS) purchase $1,001 - $15,000
- 2025-04-23: Ro Khanna (Democrat-CA) sale $1,001 - $15,000
- 2025-04-08: Rob Bresnahan (Republican-PA) purchase $1,001 - $15,000
- 2025-03-12: Ro Khanna (Democrat-CA) sale $1,001 - $15,000
- 2025-02-25: Ro Khanna (Democrat-CA) purchase $1,001 - $15,000
- 2025-01-13: Rob Bresnahan (Republican-PA) sale $1,001 - $15,000
- 2024-11-15: Ro Khanna (Democrat-CA) sale $1,001 - $15,000

## Recent insider transactions (0)


## Citation

When citing, use: "MONOLITHIC PWR SYS INC (MPWR) institutional ownership data via Superinvestor (https://superinvestorclub.com/stock/MPWR), aggregating SEC 13F, Form 4, and congressional disclosures."