Current position

Fidelity Investments’s Monolithic Pwr Sys Inc (MPWR) position

Reported position history, portfolio importance and verified filing changes from public SEC disclosures.

FMR LLCVerified through Q2 2026
Relationship snapshot

At a glance

The full verified relationship, including prior ownership episodes and exits where supported.

First reportedQ2 2022Earliest verified positive filing snapshot
Latest statusCurrent positionBased on the latest supported relationship state
Peak shares5.18MHighest verified quarter-end share count
Quarters reported17Verified quarters with shares above zero
What happened?

FMR LLC first reported Monolithic Pwr Sys Inc in Q2 2022. The reported position was increased and reduced across later filings. FMR LLC currently reports 5.18M shares. The latest verified filing showed: Bought 17.6% more.

Verified SEC history

Position over time

See the same verified relationship through reported shares, portfolio weight or reported value.

Metric

Gaps indicate periods that cannot be safely connected or where a verified corporate action changes the raw share scale. Stock price, when available, is market context and not a transaction price.

Key filing events

What changed

Latest filing plus the most meaningful reported changes. Unchanged quarters are collapsed by default.

Q2 2026
Bought 17.6% more+776.43K shares · 5.18M shares reported after the change
Filing context

Quarter-end price $1,382.36

Q1 2026
Bought 10.7% more+423.82K shares · 4.40M shares reported after the change
Filing context

Quarter-end price $1,093.35

Q4 2025
Bought 11.6% more+412.21K shares · 3.98M shares reported after the change
Filing context

Quarter-end price $906.36

Q3 2025
Bought 5.1% more+172.09K shares · 3.56M shares reported after the change
Filing context

Quarter-end price $920.64

Q2 2025
Sold 3.0% of the position−106.01K shares · 3.39M shares remained
Filing context

Quarter-end price $731.38

Q1 2025
Bought 12.2% more+380.56K shares · 3.50M shares reported after the change
Filing context

Quarter-end price $579.98

Portfolio importance

How important is Monolithic Pwr Sys Inc in FMR LLC’s reported portfolio?

Relative importance is measured only within the verified primary non-option reported portfolio for each quarter.

Current portfolio weight0.3%Q2 2026
Current rank#46of 5572 reported positions
Peak portfolio weight0.3%Q2 2026
Best historical rank#46Q2 2026
SEC evidence & methodology

SEC filing evidence

Market context and filing-derived values are kept separate from actual transaction prices, which 13F filings do not disclose.

Latest verified stock price$1,355.472026-09-23

Market context only; not an investor transaction price.

Latest filing quarter-end price$1,382.36Q2 2026

Derived from validated reported value and shares where supported.

Latest verified investor filingQ2 2026 · filed 2026-08-13
Open SEC filing ↗

Coverage is bounded to Fidelity’s top reported positions and material events rather than every security in each Form 13F. The consolidated FMR LLC filing includes multiple Fidelity investment managers. Source filings may contain additional securities, and 13F filings do not reveal exact trade dates or execution prices.