Welcome to our dedicated page for MONOLITHIC POWER SYSTEMS SEC filings (Ticker: MPWR), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Our SEC filing database is enhanced with expert analysis from Rhea-AI, providing insights into the potential impact of each filing on MONOLITHIC POWER SYSTEMS's stock performance. Each filing includes a concise AI-generated summary, sentiment and impact scores, and end-of-day stock performance data showing the actual market reaction. Navigate easily through different filing types including 10-K annual reports, 10-Q quarterly reports, 8-K current reports, proxy statements (DEF 14A), and Form 4 insider trading disclosures.
Designed for fundamental investors and regulatory compliance professionals, our page simplifies access to critical SEC filings. By combining real-time EDGAR feed updates, Rhea-AI's analytical insights, and historical stock performance data, we provide comprehensive visibility into MONOLITHIC POWER SYSTEMS's regulatory disclosures and financial reporting.
MONOLITHIC POWER SYSTEMS INC director Jeff Zhou sold 1,514 shares of Common Stock in open-market transactions. The sales occurred on May 5 and May 6, 2026, at prices between $1,574.48 and $1,650.00 per share. After these transactions, Zhou directly holds 4,286 shares of Monolithic Power Systems common stock.
Jeff Zhou reported proposed sales of 500 shares of Common Stock under Rule 144 and disclosed recent dispositions. The filing lists 500 restricted shares (originally dated 02/07/2013) as the securities to be sold and shows 1,014 shares sold on 05/05/2026 for $1,609,285.29.
Monolithic Power Systems EVP Maurice Sciammas reported an indirect open-market sale of 380 shares of common stock at $1,583.81 per share through the Rosalind Sciammas Brokerage Account on May 5, 2026, leaving 919 shares in that account. The filing also lists multiple indirect trust and GRAT holdings and shows a separate direct holding of 178,644 common shares as of the same date.
MONOLITHIC POWER SYSTEMS INC EVP Maurice Sciammas reported a small pre-planned stock sale by a family trust. On May 4, 2026, the Clement Sciammas Trust sold 30 shares of MPWR common stock at $1,588.73 per share in an open-market transaction.
After this sale, the Clement Sciammas Trust held 1,209 shares. The filing also shows other indirect holdings in various Sciammas family trusts and GRATs, and 178,644 shares held directly. The sale was executed under a Rule 10b5-1 trading plan adopted on November 19, 2025, indicating it was pre-arranged.
Morgan Stanley Smith Barney LLC submitted a Form 144 notifying the SEC of proposed sales of Common Stock of MPWR.
The filing is dated 05/05/2026 and lists NASDAQ as the market. The header shows the figures 1609285.29 and 49130000. The securities to be sold are listed as Restricted Stock with example lot sizes including 227 (02/07/2013) and 348 (02/06/2025).
MPWR filed a Rule 144 notice reporting the intended sale of 400 shares of Common Stock. The filing lists two GRAT distributions to Maurice Sciammas dated 08/19/2025 (80 shares from 05/02/2018 and 320 shares from 05/07/2014) and names UBS Financial Services Inc. as the broker.
Theodore Bernhard Blegen filed a Form 144 reporting a proposed sale of 3,000 common shares. The filing also lists recent dispositions by Blegen during the prior three months: 3,000 shares on 04/01/2026, 3,000 shares on 03/02/2026, 21,725 shares on 02/06/2026, and 3,000 shares on 02/02/2026, each with the dollar amounts shown in the filing.