# 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: 2026-08-29T13:48:52.515Z

## Summary

As of the most recent 13F filing period, MONOLITHIC PWR SYS INC (MPWR) is held by 4 tracked superinvestors with an aggregate position value of $127.9M representing 08510337153096593 shares.

## Top institutional holders (4)

| Rank | Manager | Fund | Shares | Value | % of Portfolio | Period |
|------|---------|------|--------|-------|----------------|--------|
| 1 | [Dan Sundheim](https://superinvestorclub.com/manager/303) | D1 Capital Partners | 85103 | $117.6M | 0.34% | 2026-06-30 |
| 2 | [Torray LLC](https://superinvestorclub.com/manager/3250) | Torray LLC | 3715 | $5.1M | 0.69% | 2026-06-30 |
| 3 | [Ray Dalio](https://superinvestorclub.com/manager/6) | Bridgewater Associates | 3096 | $4.3M | 0.02% | 2026-06-30 |
| 4 | [Lee Ainslie](https://superinvestorclub.com/manager/58) | Maverick Capital | 593 | $819,739 | 0.01% | 2026-06-30 |

## Ownership history (quarter-over-quarter)

- 2023-12-31: 1 holders, $370,899 aggregate, 0588 shares
- 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
- 2026-06-30: 4 holders, $127.9M aggregate, 08510337153096593 shares

## Recent congressional trades (10)

- 2026-06-05: Byron Donalds (Republican-FL) sale $1,001 - $15,000
- 2026-01-05: Markwayne Mullin (Republican-OK) purchase $15,001 - $50,000
- 2025-10-20: Michael Patrick Guest (R-MS) purchase $1,001 - $15,000
- 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."