# MONOLITHIC PWR SYS INC COM

MONOLITHIC PWR SYS INC COM is a security (CUSIP 609839105) tracked across SEC portfolio filings. 1,222 institutional managers reported $46.6B on Form 13F as of 2026-06-30; 109 registered fund positions totaling $4.2B via N-PORT as of 2026-06-30.

## Summary

- Issuer: MONOLITHIC PWR SYS INC
- Class: COM
- CUSIP: 609839105
- Asset category: EC
- 13F holders: 1,222
- 13F value: $46.6B
- 13F period: 2026-06-30
- N-PORT fund positions: 109
- N-PORT value: $4.2B
- N-PORT report: 2026-06-30

## Top institutional holders (Form 13F)

_Showing 15 of 1,222 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| BlackRock, Inc. | New York, NY | $6.6B | 6,072,467 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $5.5B | 6,034,394 |
| FMR LLC | BOSTON, MA | $4.8B | 4,400,831 |
| STATE STREET CORP | BOSTON, MA | $2.4B | 2,188,454 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $1.6B | 1,432,066 |
| Invesco Ltd. | ATLANTA, GA | $1.1B | 1,030,894 |
| FRANKLIN RESOURCES INC | San Mateo, CA | $1.0B | 928,671 |
| MORGAN STANLEY | NEW YORK, NY | $717.6M | 656,367 |
| FIRST TRUST ADVISORS LP | Wheaton, IL | $646.6M | 591,353 |
| GOLDMAN SACHS GROUP INC | NEW YORK, NY | $621.1M | 568,064 |
| [MASSACHUSETTS FINANCIAL SERVICES CO /MA/](https://search.stillhousedata.com/firm/110045) | Boston, MA | $611.2M | 442,176 |
| BARCLAYS PLC | LONDON, X0 | $607.7M | 555,808 |
| UBS Group AG | Zurich, V8 | $592.5M | 540,413 |
| JPMORGAN CHASE & CO | NEW YORK, NY | $556.2M | 554,919 |
| NORTHERN TRUST CORP | CHICAGO, IL | $534.8M | 489,120 |

## Top fund holders (N-PORT)

_Showing 15 of 109 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [Invesco QQQ Trust, Series 1](https://search.stillhousedata.com/fund/S000101292) | Invesco QQQ Trust, Series 1 | $1.1B | 30.37% |
| State Street(R) SPDR(R) S&P 500(R) ETF Trust | State Street(R) SPDR(R) S&P 500(R) ETF Trust | $620.4M | 9.52% |
| [T. Rowe Price Mid-Cap Growth Fund, Inc.](https://search.stillhousedata.com/fund/S000002102) | T. ROWE PRICE MID-CAP GROWTH FUND, INC. | $375.6M | 166.72% |
| [T. Rowe Price Blue Chip Growth Fund, Inc.](https://search.stillhousedata.com/fund/S000002069) | T. ROWE PRICE BLUE CHIP GROWTH FUND, INC. | $369.4M | 62.83% |
| [Invesco S&P 500 Equal Weight ETF](https://search.stillhousedata.com/fund/S000060812) | Invesco Exchange-Traded Fund Trust | $254.1M | 28.92% |
| [Virtus KAR Mid-Cap Core Fund](https://search.stillhousedata.com/fund/S000025925) | Virtus Equity Trust | $207.2M | 1063.74% |
| [Fidelity Contrafund](https://search.stillhousedata.com/fund/S000006037) | Fidelity Contrafund | $159.5M | 10.11% |
| [Fidelity Growth Company Fund](https://search.stillhousedata.com/fund/S000007119) | Fidelity Mt. Vernon Street Trust | $110.7M | 11.21% |
| [T. Rowe Price Diversified Mid-Cap Growth Fund, Inc.](https://search.stillhousedata.com/fund/S000002073) | T. ROWE PRICE DIVERSIFIED MID-CAP GROWTH FUND, INC. | $78.9M | 185.27% |
| [VANGUARD U.S. GROWTH FUND](https://search.stillhousedata.com/fund/S000004444) | VANGUARD WORLD FUND | $71.4M | 15.02% |
| [THRIVENT MID CAP STOCK FUND](https://search.stillhousedata.com/fund/S000001345) | Thrivent Mutual Funds | $68.9M | 228.86% |
| [PGIM Jennison Mid-Cap Growth Fund](https://search.stillhousedata.com/fund/S000004657) | Prudential Jennison Mid-Cap Growth Fund, Inc. | $67.7M | 376.72% |
| [VALUE LINE MID CAP FOCUSED FUND, INC.](https://search.stillhousedata.com/fund/S000007570) | Value Line Mid Cap Focused Fund, Inc. | $64.2M | 478.39% |
| [T. Rowe Price Science & Technology Fund, Inc.](https://search.stillhousedata.com/fund/S000002119) | T. ROWE PRICE SCIENCE & TECHNOLOGY FUND, INC. | $44.7M | 41.61% |
| [T. Rowe Price New Horizons Fund, Inc.](https://search.stillhousedata.com/fund/S000002106) | T. ROWE PRICE NEW HORIZONS FUND, INC. | $41.7M | 32.64% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/609839105.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.