Monolithic Power Systems Inc. – Investors and Politicians Who Own It
MPWR
Investors who own it
7 tracked investors, $237.7M in shares, each from their latest 13F.
| Investor | Value | Share of portfolio |
|---|---|---|
Dan SundheimD1 Capital Partners, Q2 2026 | $117.6M | 0.34% |
| $87.8M | 0.06% | |
| $25.3M | 0.43% | |
Ray DalioBridgewater Associates, Q2 2026 | $4.3M | 0.02% |
Jeremy GranthamGMO (Grantham Mayo Van Otterloo), Q2 2026 | $1.5M | 0.00% |
Lee AinslieMaverick Capital, Q2 2026 | $819.7K | 0.01% |
Barry RitholtzRitholtz Wealth Management, Q2 2026 | $381.8K | 0.01% |
Politicians who own it
Estimated from annual disclosures and trades; values are rough estimates.
| Politician | Est. value | Share of portfolio |
|---|---|---|
Markwayne MullinR-OK · Senate | $138.5K | 1.35% |
Robert P. Bresnahan, Jr.R-PA · House | $12.7K | 0.07% |
Michael GuestR-MS · House | $11.1K | 2.05% |
Byron DonaldsR-FL · House | $9.8K | 1.30% |
Investors buying and selling
| Investor | Action | Shares now |
|---|---|---|
| National Pension Service (Korea) | Added +2.4% | 79,014 |
| Jeremy Grantham | New | 1,408 |
Politicians trading it
Latest Congress trades disclosed under the STOCK Act; amounts are ranges.
| Politician | Action | Traded |
|---|---|---|
Byron DonaldsSpouseR-FL · House | Sold part$1K–$15K | Jun 5, 2026disclosed Jul 15, 2026 |
Byron DonaldsR-FL · House | Sold part$1K–$15K | Jun 5, 2026disclosed Jul 15, 2026 |
Markwayne MullinJointR-OK · Senate | Bought$15K–$50K | Feb 4, 2026disclosed Mar 2, 2026 |
Markwayne MullinSpouseR-OK · Senate | Bought$15K–$50K | Jan 5, 2026disclosed Feb 4, 2026 |
Markwayne MullinR-OK · Senate | Bought$15K–$50K | Jan 5, 2026disclosed Feb 4, 2026 |
Michael GuestChildR-MS · House | Bought$1K–$15K | Oct 20, 2025disclosed Nov 19, 2025 |
Robert P. Bresnahan, Jr.R-PA · House | Bought$1K–$15K | Apr 8, 2025disclosed May 8, 2025 |
Robert P. Bresnahan, Jr.JointR-PA · House | Sold$1K–$15K | Jan 13, 2025disclosed Feb 13, 2025 |
Tommy TubervilleJointR-AL · Senate | Sold$1K–$15K | May 3, 2024disclosed Aug 5, 2026 |
Tommy TubervilleJointR-AL · Senate | Sold$1K–$15K | May 3, 2024disclosed Jun 14, 2024 |
Tommy TubervilleJointR-AL · Senate | Bought$1K–$15K | Oct 17, 2023disclosed Nov 16, 2023 |
Tommy TubervilleJointR-AL · Senate | Sold part$1K–$15K | Apr 3, 2023disclosed May 12, 2023 |
Tommy TubervilleJointR-AL · Senate | Sold part$1K–$15K | Apr 3, 2023disclosed May 12, 2023 |
Tommy TubervilleJointR-AL · Senate | Sold part$1K–$15K | Apr 3, 2023disclosed May 11, 2023 |
Tommy TubervilleJointR-AL · Senate | Sold part$1K–$15K | Apr 3, 2023disclosed May 11, 2023 |
Tommy TubervilleJointR-AL · Senate | Bought$1K–$15K | Sep 30, 2021disclosed Oct 15, 2021 |